Prestressing force counter-tension reaction frame and surcharge preloading structureTechnical Field
The utility model relates to the technical field of engineering construction, in particular to a pre-stress counter-tension reaction frame and a preloading structure.
Background
In bridge and building construction, hanging basket preloading is a common construction method used for simulating actual construction load and checking bearing capacity and stability of a structure. The hanging basket needs to be pre-pressed before being used, and the traditional hanging basket pre-pressing mode is to pile up existing materials of a building site on the hanging basket so as to achieve the pre-pressing effect on the hanging basket. The hanging basket preloading method is characterized in that the hanging basket preloading method is used for hanging the hanging basket preloading objects at the high altitude, and the hanging basket preloading method is characterized in that the hanging basket preloading method is used for hanging the hanging basket preloading objects at the high altitude.
Disclosure of utility model
In view of the above, the present utility model provides a pre-stress counter-tension reaction frame and a preloading structure for shortening the construction period and reducing the construction strength.
The utility model solves the problems by the following technical means:
The utility model discloses a pre-stress anti-tensioning reaction frame which comprises an upper group of first embedded parts and a lower group of first embedded parts, wherein the upper group and the lower group of first embedded parts are pre-buried at the inner side edge of a No. 0 concrete block of a main bridge box girder, the second embedded parts are used for connecting and fixing the upper group and the lower group of first embedded parts, a triangular bracket fixed on the side surface of the No. 0 concrete block through the two groups of first embedded parts, a plurality of jacks arranged at the bottom of the triangular bracket, and a folding section stiffness framework arranged at the lower end of the jacks through steel wedge blocks.
Preferably, the tripod comprises a triangular structure fixed by the first embedded part and having the same number as the jacks, and a connecting bottom beam arranged at the bottom of the joint of the triangular structures, wherein the jacks and the triangular structures are arranged at the bottom of the connecting bottom beam in one-to-one correspondence.
Preferably, the triangular structure comprises a horizontal bottom beam and an inclined strut, wherein the inclined strut is welded at the free end of the horizontal bottom beam and is close to the middle, and the inclined strut and the other end of the horizontal bottom beam are respectively connected and fixed on the upper embedded part and the lower embedded part through flange steel plates.
Preferably, the horizontal bottom beam, the diagonal braces and the connecting bottom beam are all 45b I-steel.
Preferably, a plurality of the horizontal bottom beams are fixedly connected by one of the flange steel plates, and a plurality of the diagonal braces are fixedly connected by the other flange steel plate.
The utility model discloses a preloading structure, which comprises the prestress anti-tensioning reaction frame, a hanging basket with an isosceles triangle cross section, a support fixing block, a bottom support plate, a steel cable, a folding section stiffness framework and a support fixing block, wherein the hanging basket is fixed at one side of the upper end of No. 0 concrete through a mounting base, the cross section of the hanging basket is isosceles triangle, the support fixing block is arranged at the middle part of the No. 0 concrete and horizontally extends to the hanging basket side and is used for tensioning and fixing the mounting base, one end of the support fixing block is connected with the end of the hanging basket through the steel cable, the other end of the support fixing block is fixed at the bottom of the No. 0 concrete through a fixing connecting piece, the steel cable passes through the support fixing block and is connected with the bottom support plate, and the folding section stiffness framework of the reaction frame is positioned on the bottom support plate.
Preferably, the hanging basket comprises a left bracket and a right bracket, wherein the upper ends of the left bracket and the right bracket are connected together and are symmetrically arranged, a middle bracket is supported at the joint of the left bracket and the right bracket, the middle bracket is connected with the left bracket and the bottom bracket at the bottom of the middle bracket, the mounting base is connected and fixed with the corresponding parts of the bottom bracket and the left bracket, and the corresponding parts of the bottom bracket and the right bracket are suspended.
Preferably, a wood plate layer is paved on the bottom supporting plate, and a steel plate is paved on the wood plate layer.
Preferably, the wood board layer is formed by fully paving square wood with the thickness of 10cm x 10 cm.
According to the technical scheme, the utility model has the following beneficial effects:
According to the pre-stress anti-tensioning reaction frame, the second embedded part is adopted to carry out traction fixation on the end part of the first embedded part in the No. 0 concrete, so that the fixation strength of the first embedded part is enhanced, the condition that the first embedded part loosens or even falls off due to the stress of the tripod is avoided, and the installation stability of the tripod is ensured;
According to the preloading structure, the hanging basket is arranged to be of an isosceles triangle structure with one side suspended, so that the preloading structure has better structural stability and high safety, the bottom is doubly fixed through the mounting base and the supporting and fixing block, the mounting is firmer and safer, and the preloading operation is performed by matching with the prestress counter-tension reaction frame, so that the preloading effect of the hanging basket is ensured.
Drawings
FIG. 1 is a schematic structural view of a pre-stressed counter-tension reaction frame of the present utility model;
FIG. 2 is a side view of the pre-stressed counter-tension reaction frame of the present utility model;
FIG. 3 is a schematic structural view of a tripod of the pre-stressed counter-tension reaction frame of the present utility model;
FIG. 4 is a schematic illustration of the installation of the pre-stressed counter-tension reaction frame of the present utility model;
Fig. 5 is a schematic structural view of a preloading structure of the present utility model.
1-5, A No. 0 block concrete-1, a prestress anti-tensioning reaction frame-2, a first embedded part-21, a second embedded part-22, a triangular bracket-23, a horizontal bottom beam-231, an inclined strut-232, a connecting bottom beam-233, a flange steel plate-24, a jack-25, a steel wedge block-26, a closure segment stiffness skeleton-27, a mounting base-3, a hanging basket-4, a left bracket-41, a right bracket-42, a middle bracket-43, a bottom bracket-44, a steel rope-45, a protective fence-46, a supporting and fixing block-5, a fixed connecting part-6 and a bottom supporting plate-7.
Detailed Description
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
As shown in fig. 1 to 4, the pre-stress counter-tension reaction frame 2 in this embodiment includes an upper and a lower sets of first embedded parts 21 embedded in the inner side of the main bridge box girder No. 0 concrete 1, a second embedded part 22 for connecting and fixing the upper and the lower sets of first embedded parts 21, a tripod 23 fixed on the side of the No. 0 concrete 1 through the two sets of first embedded parts 21, a plurality of jacks 25 arranged at the bottom of the tripod 23, and a folding section stiffness frame 27 mounted at the lower ends of the jacks 25 through steel wedges 26.
In the concrete installation, as shown in fig. 4, two pre-stress counter-tension reaction frames 2 are symmetrically arranged on two sides of the No. 0 concrete block 1.
The pre-stress counter-tension reaction frame 2 of the embodiment adopts the second embedded part 22 to carry out traction fixation on the end part of the first embedded part 21 in the No. 0 block concrete 1, thereby enhancing the fixation strength of the first embedded part 21, avoiding the condition that the first embedded part 21 loosens or even breaks away due to the stress of the tripod 23, ensuring the installation stability of the tripod 23, adopting the jack 25 arranged at the lower end of the tripod 23 to carry out pre-compression operation, and compared with the traditional pre-compression operation, the pre-compression reaction frame has the advantages of less operation personnel, less hoisting operation amount, convenient installation, clear and controllable pre-compression load value, no need of high-altitude hoisting of piled objects, improving the construction efficiency, reducing the construction strength and also ensuring the safety of construction.
As a preferred implementation manner of this embodiment, as shown in fig. 3, the tripod 23 includes a triangle structure fixed by the first embedded part 21 and having the same number as the jacks 25, and a connection bottom beam 233 disposed at the bottom of the intersection of the triangle structures, specifically, the triangle structure includes a horizontal bottom beam 231 made of 45b i-steel and a diagonal brace 232 welded to the free end of the horizontal bottom beam 231 near the middle, and the jacks 25 are disposed at the bottom of the connection bottom beam 233 in one-to-one correspondence with the triangle structures, so that when the jacks 25 react on the connection bottom beam 233, the acting force is dispersed and counteracted by the triangle structure, avoiding the situation that the connection bottom beam 233 is deformed due to the stress, thereby guaranteeing the pre-compression effect, and the other ends of the diagonal brace 232 and the horizontal bottom beam 231 are respectively connected and fixed to the first embedded part 21 through the flange steel plates 24, so that the stress of the diagonal brace 232 and the horizontal bottom beam 231 is dispersed to the surrounding area through the flange steel plates 24, thereby avoiding the situation that the concrete is concentrated by the flange steel plates 24, and prolonging the service life of the connection is greatly prolonged.
As a preferred embodiment of this embodiment, as shown in fig. 2, a plurality of horizontal bottom beams 231 are connected and fixed by one flange steel plate 24, and a plurality of diagonal braces 232 are connected and fixed by another flange steel plate 24, so that the connection strength is further improved, and the No. 0 concrete 1 at the connection position is also protected, so that the concrete is not easily damaged.
Example 2
As shown in FIG. 5, the preloading structure comprises the prestress counter-tensioning reaction frame 2, a hanging basket 4 with an isosceles triangle cross section, wherein the hanging basket 4 is fixed on one side of the upper end of the No. 0 concrete block 1 through a mounting base 3, a supporting fixing block 5 which is arranged in the middle of the No. 0 concrete block 1 and horizontally extends to the hanging basket 4 and is used for tensioning and fixing the mounting base 3, one end of the supporting fixing block is connected with a bottom supporting plate 7 at the bottom of the No. 0 concrete block 1 through a steel cable 45, the other end of the supporting basket 4 is fixed on the bottom supporting plate 7 through a fixing connecting piece 6, the steel cable 45 passes through the supporting fixing block 5 and is connected onto the bottom supporting plate 7, and a stiff skeleton 27 of a folding section of the reaction frame is positioned on the bottom supporting plate 7.
According to the surcharge preloading structure, the hanging basket 4 is arranged to be of an isosceles triangle structure with one side suspended, so that the structure stability is better, the safety is high, the bottom is fixed by the mounting base 3 and the supporting fixing block 5 in a double mode, the mounting is firm and safe, the preloading operation is carried out by matching with the prestress counter-tension reaction frame 2, and the preloading effect of the hanging basket 4 is guaranteed.
As a preferred implementation manner of this embodiment, the hanging basket 4 includes a left bracket 41 and a right bracket, which are connected together at upper ends and are symmetrically arranged, a middle bracket 43 supported at a connection position of the left bracket 41 and the right bracket, and a bottom bracket 44 connected to bottoms of the left bracket 41 and the right bracket 43, where the bottom bracket 44 and the left bracket 41 are connected and fixed by the mounting base 3, and a portion of the bottom bracket 44 corresponding to the right bracket are suspended.
For convenience of use, as a preferred implementation manner of this embodiment, a wood board layer (not shown in the figure) formed by fully paving 10cm square wood is paved on the bottom supporting plate 7, and a steel plate (not shown in the figure) is paved on the wood board layer, so that protection and buffering are performed on the bottom supporting plate 7, and the service life is prolonged.
As a preferred implementation manner of this embodiment, the guard rails 46 are disposed around the bottom bracket 44, so as to enhance construction safety.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.