Disclosure of Invention
Accordingly, the present invention is directed to a method for constructing a deep foundation pit supporting component based on BIM technology and a supporting component thereof, so as to solve the technical problems mentioned in the prior art.
The construction method of the medium-deep foundation pit supporting component based on the BIM technology is characterized by comprising the following steps of:
Obtaining actual measurement data of a foundation pit site, constructing a three-dimensional foundation pit model according to the actual measurement data, analyzing the soil structure of the foundation pit site to obtain soil structure data, and configuring the soil structure model of the three-dimensional foundation pit model based on the soil structure data;
reading running water segment division data and earthwork calculation recorded in foundation pit engineering construction, and carrying out earthwork excavation simulation on the basis of an earthwork structure model according to the divided running water segments to obtain deformation data of deformation of an earthwork structure caused by earthwork excavation;
Performing secondary correction on the three-dimensional foundation pit model based on the soil structure model according to the deformation data to obtain a foundation pit simulation model;
Carrying out supporting structure construction simulation on the foundation pit simulation model according to the defined flow section by using soil structure data to obtain preliminary simulation data, laying a supporting structure model in the foundation pit simulation model according to the preliminary simulation data, and configuring a supporting structure model corresponding to the supporting structure model;
Performing structural collision inspection on the support structure model in the foundation pit simulation model to obtain collision points among the support structure model, the foundation pit simulation model and the support structure model, and judging the rationality of the support structure model and the support structure model based on the interval among the collision points so as to determine layout data of the support structure model and the support structure model;
and guiding the installation of the deep foundation pit supporting component in the site by using the layout data.
Further, reference data during middle-deep foundation pit exploration are determined, and elevation points or contour lines obtained through exploration in the middle-deep foundation pit based on the reference data are used as actual measurement data of foundation pit sites.
The three-dimensional foundation pit model is divided into a plurality of flowing water sections according to the flowing water section division data, three-dimensional scanning data of the foundation pit excavation side face of a foundation pit site in each flowing water section are obtained, the three-dimensional scanning data of each flowing water section are encoded and used as basic input of an earth structure model, the earth structure is trained and analyzed through constructing a neural network model with multiple convolution channels, corresponding earth structure characteristics are obtained, the earth structure characteristics are extracted to obtain a structure prediction model, flowing water section division data and earth calculation amount recorded in foundation pit engineering construction are read, a closed equivalent surface is generated for the structure prediction model, a soil layer entity block is formed, and the earth structure model is generated by taking the soil layer entity block as a reference.
Further, the method for obtaining deformation data of deformation of the soil structure caused by earth excavation through earth excavation simulation comprises the following steps:
Reading running water segment division data recorded in foundation pit engineering construction, and dividing a middle-deep foundation pit into a plurality of running water segments;
At least one flowing water section is selected as a monitoring section, a plurality of displacement sensors are sequentially arranged outwards along the edge of the excavation surface of the middle-deep foundation pit, and displacement and strain data of adjacent retaining wall structures during soil excavation are collected through the displacement sensors;
Generating a foundation pit deformation form and a deformation value of a critical area through a finite element analysis model according to the displacement and strain data;
And obtaining a pit deformation form, extracting form features of the pit deformation form, generating a deformation prediction model according to the deformation value of the critical area corresponding to each form feature, and predicting other flowing water sections in the deep foundation pit by using the deformation prediction model to obtain deformation data of the whole soil structure model.
Further, collision points between the foundation pit simulation model and the support structure model are used as references for judging the rationality of the support structure model and the support structure model by using the point positions with the distance smaller than 20mm being smaller than or equal to 3.
The invention also provides a middle-deep foundation pit supporting component, which is designed by the construction method of the middle-deep foundation pit supporting component based on the BIM technology, and comprises the following steps:
The substrate models are arranged on two opposite sides of the side wall of the foundation pit in the foundation pit simulation model;
Simulating the drainage capacity of one side of the substrate model adjacent to the soil structure model according to the actual measurement data and the soil structure data of the foundation pit field corresponding to the foundation pit simulation model, and calculating drainage capacity data;
A plurality of groups of water drainage hole units are formed on the substrate model along a preset installation interval according to water drainage capacity data;
And a supporting structure model is arranged between the opposite substrate models in the foundation pit simulation model, and the supporting structure model comprises:
The fixing rod assemblies comprise a first rod body unit and a second rod body unit which are connected in a sliding mode along the axis direction of the fixing rod assemblies, opposite two ends of the first rod body unit and the second rod body unit extend to be connected with the substrate models positioned on two opposite sides of the side wall of the foundation pit model respectively, locking piece assemblies are arranged at adjacent ends of the first rod body unit and the second rod body unit, and the locking piece assemblies are used for reversely locking the fixing rod assemblies when the fixing rod assemblies are stretched;
The fixing piece assembly is arranged between two adjacent groups of substrate models, and is used for driving the two adjacent groups of substrate models to move towards opposite directions to be closely attached to two opposite sides of the side wall of the foundation pit model, and stretching the fixing rod assembly to synchronously fix the substrate models;
The inside of two piece at least stock subassemblies, the inside of stock subassembly is hollow structure, just be provided with the packing unit in the stock subassembly, a plurality of groups inlet opening unit have been seted up to the periphery of stock subassembly, the one end of stock subassembly extends to all around and is provided with the tip unit, just the stock subassembly is close to the wash port unit has been seted up to the one end of tip unit, the stock subassembly is kept away from the one end of tip unit is passed the wash port unit and is inserted in the lateral wall of foundation ditch model, the stock subassembly is used for right fixed spacing and will be carried out to the mounted position of base plate model the water in the soil of foundation ditch model week side is passed through the inlet opening unit is collected to in the stock subassembly and follow the wash port unit discharges.
Further, each two of the fixing rod assemblies between two adjacent groups of the substrate models is provided with one group of the fixing member assemblies, and the fixing member assemblies comprise:
the two opposite sides of the first connecting plate unit extend to be connected with the peripheries of the first rod body units of the two fixed rod assemblies respectively;
the two opposite sides of the second connecting plate unit extend to be connected with the peripheries of the second rod body units of the two fixed rod assemblies respectively;
And the driving piece assembly is connected with the first connecting plate unit and the second connecting plate unit so as to drive the first connecting plate unit and the second connecting plate unit to move towards opposite directions, so that the fixing rod assembly is stretched or contracted.
Further, the driving piece comprises a screw unit, the periphery of the screw unit is in threaded connection with any one of the first connecting plate unit and the second connecting plate unit, one end of the screw unit extends to be in rotational connection with the rest one of the first connecting plate unit and the second connecting plate unit, one side, far away from the rotational position of the screw unit, of the other end of the screw unit extends to be provided with a control unit, and the control unit is used for controlling the screw unit to rotate to adjust the interval between the first connecting plate unit and the second connecting plate unit.
Further, the latch assembly includes:
The rack unit is arranged at one end of the first rod body unit;
the sliding groove unit is arranged at one end of the second rod body unit and is in sliding connection with the rack unit;
the pawl unit is arranged on one side of the opening of the chute unit, one end of the pawl unit is rotatably arranged at the end part of the second rod body unit through a torsion spring, and the other end of the pawl unit is meshed with the rack unit and used for locking the fixed rod assembly when the first rod body unit and the second rod body unit are mutually close.
Further, two adjacent groups of substrate models are connected in a plugging manner;
The edge side of one group of the substrate models is provided with slot units, and one side of each slot unit, which is close to the fixing piece assembly, is provided with guide opening units which are opened towards two sides;
The other group of the substrate models is provided with a cylindrical inserting block unit towards the edge of the inserting groove unit, the position of the inserting block unit is matched with the inserting groove unit, and the axial direction of the inserting block unit is perpendicular to the opening direction of the guiding opening unit.
According to the method, deformation data caused by the foundation pit simulation model in the construction process can be effectively simulated in a modeling mode, the supporting structure model can be reasonably laid according to the construction simulation, and the supporting structure model is reasonably laid so as to enhance scientificity and rationality in construction.
Constructing a foundation pit simulation model, carrying out construction simulation of a supporting structure on the foundation pit simulation model according to a defined flowing water section by using soil structure data to obtain preliminary simulation data, laying the supporting structure model in the foundation pit simulation model according to the preliminary simulation data, configuring the supporting structure model corresponding to the supporting structure model, carrying out structural collision check on the supporting structure model in the foundation pit simulation model to obtain collision points among the supporting structure model, the foundation pit simulation model and the supporting structure model, judging rationality of the supporting structure model and the supporting structure model based on the interval among the collision points to determine laying data of the supporting structure model and the supporting structure model, and guiding the installation of deep foundation pit supporting components in the field by using the laying data.
Under the guidance of the invention, compared with the traditional construction mode of positioning and mounting by adopting the profile steel in the construction process, the construction method not only reduces the damage degree of the pit wall of the foundation pit, but also can randomly adjust the mounting position of each group of base plate models in the construction process so as to match the base of the foundation pit model for positioning and mounting, and does not need to carry out secondary perforating processing on the base plate, thereby obviously reducing the construction difficulty and the construction cost.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The construction method of the medium-deep foundation pit supporting component based on the BIM technology is characterized by comprising the following steps of:
Obtaining actual measurement data of a foundation pit site, constructing a three-dimensional foundation pit model according to the actual measurement data, analyzing the soil structure of the foundation pit site to obtain soil structure data, and configuring the soil structure model of the three-dimensional foundation pit model based on the soil structure data;
reading running water segment division data and earthwork calculation recorded in foundation pit engineering construction, and carrying out earthwork excavation simulation on the basis of an earthwork structure model according to the divided running water segments to obtain deformation data of deformation of an earthwork structure caused by earthwork excavation;
Performing secondary correction on the three-dimensional foundation pit model based on the soil structure model according to the deformation data to obtain a foundation pit simulation model;
Carrying out supporting structure construction simulation on the foundation pit simulation model according to the defined flow section by using soil structure data to obtain preliminary simulation data, laying a supporting structure model in the foundation pit simulation model according to the preliminary simulation data, and configuring a supporting structure model corresponding to the supporting structure model;
Performing structural collision inspection on the support structure model in the foundation pit simulation model to obtain collision points among the support structure model, the foundation pit simulation model and the support structure model, and judging the rationality of the support structure model and the support structure model based on the interval among the collision points so as to determine layout data of the support structure model and the support structure model;
and guiding the installation of the deep foundation pit supporting component in the site by using the layout data.
Further, reference data during middle-deep foundation pit exploration are determined, and elevation points or contour lines obtained through exploration in the middle-deep foundation pit based on the reference data are used as actual measurement data of foundation pit sites.
The three-dimensional foundation pit model is divided into a plurality of flowing water sections according to the flowing water section division data, three-dimensional scanning data of the foundation pit excavation side face of a foundation pit site in each flowing water section are obtained, the three-dimensional scanning data of each flowing water section are encoded and used as basic input of an earth structure model, the earth structure is trained and analyzed through constructing a neural network model with multiple convolution channels, corresponding earth structure characteristics are obtained, the earth structure characteristics are extracted to obtain a structure prediction model, flowing water section division data and earth calculation amount recorded in foundation pit engineering construction are read, a closed equivalent surface is generated for the structure prediction model, a soil layer entity block is formed, and the earth structure model is generated by taking the soil layer entity block as a reference.
Further, the method for obtaining deformation data of deformation of the soil structure caused by earth excavation through earth excavation simulation comprises the following steps:
Reading running water segment division data recorded in foundation pit engineering construction, and dividing a middle-deep foundation pit into a plurality of running water segments;
At least one flowing water section is selected as a monitoring section, a plurality of displacement sensors are sequentially arranged outwards along the edge of the excavation surface of the middle-deep foundation pit, and displacement and strain data of adjacent retaining wall structures during soil excavation are collected through the displacement sensors;
Generating a foundation pit deformation form and a deformation value of a critical area through a finite element analysis model according to the displacement and strain data;
And obtaining a pit deformation form, extracting form features of the pit deformation form, generating a deformation prediction model according to the deformation value of the critical area corresponding to each form feature, and predicting other flowing water sections in the deep foundation pit by using the deformation prediction model to obtain deformation data of the whole soil structure model.
Further, collision points between the foundation pit simulation model and the support structure model are used as references for judging the rationality of the support structure model and the support structure model by using the point positions with the distance smaller than 20mm being smaller than or equal to 3.
The invention also provides a middle-deep foundation pit supporting component, which is designed by the construction method of the middle-deep foundation pit supporting component based on the BIM technology, and comprises the following steps:
The substrate models are arranged on two opposite sides of the side wall of the foundation pit in the foundation pit simulation model;
Simulating the drainage capacity of one side of the substrate model adjacent to the soil structure model according to the actual measurement data and the soil structure data of the foundation pit field corresponding to the foundation pit simulation model, and calculating drainage capacity data;
A plurality of groups of water drainage hole units are formed on the substrate model along a preset installation interval according to water drainage capacity data;
And a supporting structure model is arranged between the opposite substrate models in the foundation pit simulation model, and the supporting structure model comprises:
The fixing rod assemblies comprise a first rod body unit and a second rod body unit which are connected in a sliding mode along the axis direction of the fixing rod assemblies, opposite two ends of the first rod body unit and the second rod body unit extend to be connected with the substrate models positioned on two opposite sides of the side wall of the foundation pit model respectively, locking piece assemblies are arranged at adjacent ends of the first rod body unit and the second rod body unit, and the locking piece assemblies are used for reversely locking the fixing rod assemblies when the fixing rod assemblies are stretched;
The fixing piece assembly is arranged between two adjacent groups of substrate models, and is used for driving the two adjacent groups of substrate models to move towards opposite directions to be closely attached to two opposite sides of the side wall of the foundation pit model, and stretching the fixing rod assembly to synchronously fix the substrate models;
The inside of two piece at least stock subassemblies, the inside of stock subassembly is hollow structure, just be provided with the packing unit in the stock subassembly, a plurality of groups inlet opening unit have been seted up to the periphery of stock subassembly, the one end of stock subassembly extends to all around and is provided with the tip unit, just the stock subassembly is close to the wash port unit has been seted up to the one end of tip unit, the stock subassembly is kept away from the one end of tip unit is passed the wash port unit and is inserted in the lateral wall of foundation ditch model, the stock subassembly is used for right fixed spacing and will be carried out to the mounted position of base plate model the water in the soil of foundation ditch model week side is passed through the inlet opening unit is collected to in the stock subassembly and follow the wash port unit discharges.
Further, each two of the fixing rod assemblies between two adjacent groups of the substrate models is provided with one group of the fixing member assemblies, and the fixing member assemblies comprise:
the two opposite sides of the first connecting plate unit extend to be connected with the peripheries of the first rod body units of the two fixed rod assemblies respectively;
the two opposite sides of the second connecting plate unit extend to be connected with the peripheries of the second rod body units of the two fixed rod assemblies respectively;
And the driving piece assembly is connected with the first connecting plate unit and the second connecting plate unit so as to drive the first connecting plate unit and the second connecting plate unit to move towards opposite directions, so that the fixing rod assembly is stretched or contracted.
Further, the driving piece comprises a screw unit, the periphery of the screw unit is in threaded connection with any one of the first connecting plate unit and the second connecting plate unit, one end of the screw unit extends to be in rotational connection with the rest one of the first connecting plate unit and the second connecting plate unit, one side, far away from the rotational position of the screw unit, of the other end of the screw unit extends to be provided with a control unit, and the control unit is used for controlling the screw unit to rotate to adjust the interval between the first connecting plate unit and the second connecting plate unit.
Further, the latch assembly includes:
The rack unit is arranged at one end of the first rod body unit;
the sliding groove unit is arranged at one end of the second rod body unit and is in sliding connection with the rack unit;
the pawl unit is arranged on one side of the opening of the chute unit, one end of the pawl unit is rotatably arranged at the end part of the second rod body unit through a torsion spring, and the other end of the pawl unit is meshed with the rack unit and used for locking the fixed rod assembly when the first rod body unit and the second rod body unit are mutually close.
Further, two adjacent groups of substrate models are connected in a plugging manner;
The edge side of one group of the substrate models is provided with slot units, and one side of each slot unit, which is close to the fixing piece assembly, is provided with guide opening units which are opened towards two sides;
The other group of the substrate models is provided with a cylindrical inserting block unit towards the edge of the inserting groove unit, the position of the inserting block unit is matched with the inserting groove unit, and the axial direction of the inserting block unit is perpendicular to the opening direction of the guiding opening unit.
According to the method, deformation data caused by the foundation pit simulation model in the construction process can be effectively simulated in a modeling mode, the supporting structure model can be reasonably laid according to the construction simulation, and the supporting structure model is reasonably laid so as to enhance scientificity and rationality in construction.
Constructing a foundation pit simulation model, carrying out construction simulation of a supporting structure on the foundation pit simulation model according to a defined flowing water section by using soil structure data to obtain preliminary simulation data, laying the supporting structure model in the foundation pit simulation model according to the preliminary simulation data, configuring the supporting structure model corresponding to the supporting structure model, carrying out structural collision check on the supporting structure model in the foundation pit simulation model to obtain collision points among the supporting structure model, the foundation pit simulation model and the supporting structure model, judging rationality of the supporting structure model and the supporting structure model based on the interval among the collision points to determine laying data of the supporting structure model and the supporting structure model, and guiding the installation of deep foundation pit supporting components in the field by using the laying data.
Under the guidance of the invention, compared with the traditional construction mode of positioning and mounting by adopting the profile steel in the construction process, the construction method not only reduces the damage degree of the pit wall of the foundation pit, but also can randomly adjust the mounting position of each group of base plate models in the construction process so as to match the base of the foundation pit model for positioning and mounting, and does not need to carry out secondary perforating processing on the base plate, thereby obviously reducing the construction difficulty and the construction cost.
Example 2
Example 2 is based on example 1 as a guide for the design and installation of deep foundation pit supporting components during field construction.
Referring to fig. 5, the present invention provides a deep and medium foundation pit supporting component, the supporting component includes a base plate 1 disposed on two opposite sides of a side wall of a foundation pit, a plurality of sets of drain holes 2 disposed on the base plate 1 along a preset installation interval, a plurality of fixing rods 3, a fixing member 6 and at least two anchor rods 8, wherein the fixing rods 3 include a first rod body 4 and a second rod body 5 slidingly connected along an axial direction thereof, opposite ends of the first rod body 4 and the second rod body 5 extend to be connected with the base plate 1 disposed on two opposite sides of the side wall of the foundation pit respectively, adjacent ends of the first rod body 4 and the second rod body 5 are provided with locking members 7, the locking members 7 are used for locking the fixing rods 3 reversely when the fixing rods 3 are stretched, so that the fixing rods 3 are automatically locked by the locking members 7 when the side wall of the foundation pit moves gradually approaching in the installation process of the base plate 1, the fixing rods 3 have a telescopic function, but no auxiliary facilities are required for carrying out reverse fixing after stretching to prevent retraction, and the construction efficiency can be improved, and the use cost is low; the fixing pieces 6 are arranged between two adjacent groups of base plates 1, the fixing pieces 6 are used for driving the two adjacent groups of base plates 1 to move towards opposite directions to be closely attached to two opposite sides of the side wall of a foundation pit, and stretching the fixing rods 3 to fix the base plates 1 synchronously, so that pretightening force is conveniently applied to the base plates 1, installation gaps exist between the base plates 1 and the side wall of the foundation pit, supporting effect is enhanced, as shown in figure 6, the inside of the anchor rods 8 is of a hollow structure, the inside of the anchor rods 8 is provided with filling materials, the filling materials can avoid soil loss when groundwater is discharged, soil environment at the periphery of the foundation pit is maintained, the periphery of the anchor rods 8 is provided with a plurality of groups of water inlet holes 9, one ends of the anchor rods 8 extend to the periphery and are provided with ends 11, the utility model discloses a convenient operation personnel utilizes appurtenance such as hammer to drive stock 8 into the lateral wall of foundation ditch on fixed spacing to base plate 1, and convenient follow-up dismantlement to stock 8 is changed simultaneously, can reduce intensity of labour to prevent that soil from being too hard from leading to stock 8 unable manual the inserting through the manual work, and stock 8 is close to the one end of end 11 and has seted up wash port 10, and stock 8 is kept away from the one end of end 11 and passes drain hole 2 and insert in the lateral wall of foundation ditch, and stock 8 is used for fixed spacing to the mounted position of base plate 1 and collects the water in the soil of foundation ditch week side in stock 8 through inlet port 9 and follow the wash port 10 and discharge.
In the above, as shown in fig. 6, when an operator builds a support assembly on the periphery of a foundation pit, a corresponding number of base plates 1, fixing rods 3, fixing pieces 6 and anchor rods 8 are preselected according to the depth and length of the foundation pit, and the base plates 1, the fixing rods 3 and the fixing pieces 6 are spliced into an integral structure on the construction site based on the width of the foundation pit, so as to obtain a plurality of groups of integrated support modules with adjustable width, then leveling the bottom of the foundation pit, installing a plurality of groups of integrated support modules on the bottom of the foundation pit to complete the integral positioning construction of the support assembly, fixing the base plates 1 on the side wall of the foundation pit through the anchor rods 8 in the construction process, preventing the base plates 1 from being misplaced, and then splicing and assembling the rest of the integrated support modules from the bottom of the foundation pit sequentially.
Further, as shown in fig. 6, the packing comprises a fine sand layer 12 and a filter screen layer 13 which are sequentially distributed along the central axis direction of the anchor rod 8, wherein the filter screen layer 13 is of a hollow cylindrical structure and is used for packing the fine sand layer 12 and then filling the fine sand layer into the anchor rod 8 so as to prevent the fine sand layer 12 in the anchor rod 8 from flowing out from the water inlet hole 9 or the water outlet hole 10 in the carrying process, and the normal use of the anchor rod 8 is ensured.
Further, as shown in fig. 3, each two fixing rods 3 between two adjacent groups of substrates 1 are provided with a group of fixing pieces 6, each fixing piece 6 comprises a first connecting plate 14, a second connecting plate 15 and a driving piece, opposite sides of the first connecting plate 14 extend to be connected with the peripheries of the first rod bodies 4 of the two fixing rods 3 respectively so as to reinforce the first rod bodies 4, opposite sides of the second connecting plate 15 extend to be connected with the peripheries of the second rod bodies 5 of the two fixing rods 3 respectively so as to reinforce the second rod bodies 5, and the driving piece is connected with the first connecting plate 14 and the second connecting plate 15 so as to drive the first connecting plate 14 and the second connecting plate 15 to move in opposite directions, so that stretching or shrinking of the fixing rods 3 is realized. Specifically, the driving member includes a screw 16, the periphery of the screw 16 is in threaded connection with any one of the first connecting plate 14 and the second connecting plate 15, one end of the screw 16 extends to be in rotational connection with the remaining one of the first connecting plate 14 and the second connecting plate 15, a control member 17 is arranged on one side of the other end extending to a rotating part far away from the screw 16, the control member 17 is used for controlling the screw 16 to rotate so as to adjust the interval between the first connecting plate 14 and the second connecting plate 15, so that after the fixing rod 3 stretches, the substrate 1 is mounted on the side wall of the foundation pit, the screw 16 is driven by the control member 17 to drive the first connecting plate 14 and the second connecting plate 15 to move towards the side far away from each other, so that the substrate 1 is pressed on the side wall of the foundation pit, and meanwhile, the fixing rod 3 is stretched to a limit length in the current state, so that the substrate 1 is mounted in place by means of external force, and labor intensity is reduced. The rotating part of the screw 16 is detachably connected with the first connecting plate 14 or the second connecting plate 15, so that the rotating part of the screw 16 is detached before the substrate 1 approaches to the foundation pit, the load of the control member 17 can be reduced when the screw 16 is driven to rotate, and the substrate 1 can be prevented from being axially pulled by the screw 16 when the substrate 1 is conveniently fixed on the side wall of the foundation pit through the anchor rod 8, and the substrate 1 is ensured to move towards the side wall of the foundation pit under the action of the thrust of the anchor rod 8. In the present embodiment, the control member 17 is provided as a handle or a motor. In order to increase the mounting strength, the motor may be driven to rotate by a screw 16, and as shown in fig. 4, the frame of the motor may be detachably mounted on the first connection plate 14, so that after one group of substrates 1 is fixed in place, the motor may be detached to fixedly mount the other substrates 1.
In the above, as shown in fig. 3, the end of the screw 16 is rotatably connected with a polygonal positioning plate, and a clamping groove adapted to the polygonal positioning plate is formed on one side of the second connecting plate 15 close to the screw 16, and in the use process, the polygonal positioning plate is inserted into the clamping groove to complete positioning and installation of the screw 16 and the second connecting plate 15.
In this embodiment, in the installation process of each group of support assemblies, one group of the base plates 1 may be fixed on the side wall of the foundation pit, and then the installation space between the other group of base plates 1 and the side wall of the foundation pit may be adjusted.
Further, as shown in fig. 7, the locking member 7 includes a rack 18, a sliding groove 19 and a pawl 20, wherein the rack 18 is disposed at one end of the first rod 4, the sliding groove 19 is disposed at one end of the second rod 5 and slidably connected with the rack 18, the pawl 20 is disposed at one side of the opening of the sliding groove 19, one end of the pawl is rotatably mounted at the end of the second rod 5 through a torsion spring, and the other end of the pawl is engaged with the rack 18, so as to lock the fixing rod 3 when the first rod 4 and the second rod 5 approach each other. Specifically, in order to prevent the pawl 20 from being disengaged from the second rack 18 due to the too fast output of the driving member, at least one set of torsion springs is disposed along the rotation axis of the pawl 20, so that the rotation axis of the pawl 20 is rotationally connected with the end portion of the second rod body 5 through the torsion springs, and therefore the pawl 20 is always in a matched state with the second rack 18 under the action of the tensioning force of the torsion springs.
Further, the fixing rod 3 is detachably connected with the base plate 1, so that the fixing rod 3 or the base plate 1 with different sizes can be conveniently replaced according to construction conditions, and the damaged fixing rod 3 or the damaged base plate 1 can be replaced, so that construction cost can be saved. Specifically, the base plate 1 is provided with a plurality of positioning holes 21 for the end parts of the fixing rods 3 to pass through, the end parts of the fixing rods 3 pass through the positioning holes 21 and are connected with fastening nuts 22, and the fastening nuts 22 are embedded in the positioning holes 21 and can be used for adjusting the length of the fixing rods 3 in a proper amount so as to enhance the adaptability of the fixing rods 3.
In the above, as shown in fig. 3,5 and 7, the shape and size of the positioning hole 21 are respectively adapted to the shape and size of the fastening nut 22, so that the end of the fixing rod 3 is screwed into the fastening nut 22 by rotating the fixing rod 3 after the fastening nut 22 is mounted to the positioning hole 21, thereby achieving the assembly of the fixing rod 3 and the substrate 1. In this embodiment, the four corners of the substrate 1 are respectively provided with the fixing rods 3, and when the side wall of the foundation pit is uneven, the spacing between the corners of the substrate 1 can be adjusted by rotating the fixing rods 3, so as to finely adjust the mounting spacing of the substrate 1, thereby ensuring that the substrate 1 is in effective contact with the side wall of the foundation pit. It should be noted that, the spiral lines at the two ends of the fixing rod 3 have the same direction selection design, so that when the fixing rod 3 is rotated, the fastening nuts 22 at the two sides of the fixing rod can be screwed into the fixing rod 3 in opposite directions.
Further, as shown in fig. 3, two adjacent groups of substrates 1 are connected in a plugging manner, wherein the edge side of one group of substrates 1 is provided with a slot 23, one side of the slot 23 close to the fixing piece 6 is provided with a guide opening 24 which opens towards two sides, the edge of the other group of substrates 1 towards the slot 23 is provided with a plug block 25 with a cylindrical structure, the position of the plug block 25 is matched with the slot 23, and the axis direction of the plug block 25 is perpendicular to the opening direction of the guide opening 24. Simultaneously, a plurality of integrated supporting modules in the foundation pit can be assembled into a supporting component with an integrated structure, so that the supporting component is subdivided into a plurality of splicing modules to be spliced and assembled on site, the transportation cost can be reduced, the method is also applicable to supporting foundation pits with different sizes, and the applicability of the supporting component is improved.