CN112284460A - Subway evacuation platform limit detection device and using method thereof - Google Patents

Abstract

The invention discloses a subway evacuation platform limit detection device and a using method thereof, and the subway evacuation platform limit detection device comprises rollers, a track gauge and displacement sensor (4), an ultrahigh sensor (20), a data processor (19) and an infrared distance meter (18), wherein the rollers, the track gauge and displacement sensor (4) and the ultrahigh sensor (20) are arranged on a bottom structure, and the bottom structure consists of a left half frame structure and a right half frame structure and can adjust the left-right distance; supporting structure is installed to bottom structure both sides, and telescopic superstructure is installed at the supporting structure top, and superstructure comprises the skeleton that the interval is adjustable of the left and right halves, and superstructure goes up installation data processor (19) and infrared range finder (18). The invention can conveniently realize the actual measurement of the geometric dimension of the subway track line and the accurate limit value of the installation of the subway evacuation platform, and has the characteristics of simple structure and safe and rapid operation and use.

Description

Subway evacuation platform limit detection device and using method thereof

Technical Field

The invention relates to installation of a subway evacuation platform, in particular to a subway evacuation platform limit detection device and a use method thereof, and belongs to the technical field of installation and construction of subway evacuation platforms.

Background

In the operation of urban rail transit, the scientific and reasonable evacuation mode and the plan can ensure that passengers can be evacuated and rescued timely, safely and efficiently in an emergency, and the evacuation platform which is unblocked is arranged in the subway tunnel not only provides an evacuation path for the passengers, but also becomes one of important fire-fighting and anti-terrorist facilities of the subway system. According to the requirement that a longitudinal evacuation platform is required to be arranged in a subway design fire protection specification (GB 51298-2018) 5.4.3 passenger carrying operation underground section, evacuation platforms are arranged in subway section tunnels in areas such as Beijing, Shanghai, Guangzhou, Chengdu, Chongqing and the like at present.

The evacuation platform is used as a lifeline project, the installation quality is particularly important, but the construction of the evacuation platform at present is generally low in one-time installation qualification rate and high in later-stage rectification and repair cost due to the fact that no professional construction specifications and standards exist. After the general evacuation platform is installed, the phenomenon of limit invasion is very easy to occur, the influence on the overall installation quality of the evacuation platform due to later-stage cutting and rectification is very large, and the service life of the evacuation platform is seriously influenced, so that the problem that how to solve the problem that the limit measurement and calculation of the evacuation platform become to be solved urgently in the installation and construction of the evacuation platform is solved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the invention provides a subway evacuation platform limit detection device, which can conveniently realize the accurate limit value of the actual subway evacuation platform installation by matching an evacuation platform limit detection trolley skeleton with an infrared horizontal distance meter, a track gauge and displacement sensor, an ultrahigh sensor and a data processor.

The utility model provides an evacuation platform boundary limit detection device of subway, includes gyro wheel, gauge and displacement sensor, superelevation sensor, data processor and infrared ray distancer, its characterized in that: the roller, the gauge and displacement sensor and the ultrahigh sensor are arranged on a bottom structure, and the bottom structure consists of a left half frame structure and a right half frame structure and can adjust the left-right spacing; supporting structure is installed to bottom structure both sides, and telescopic superstructure is installed at the supporting structure top, and superstructure comprises the adjustable skeleton of two halves interval about, and data processor, infrared range finder are installed to superstructure.

The gauge and displacement sensor comprises a hydraulic support rod and a data line.

The ultra-high sensor includes a data line.

The bottom structure comprises a bottom structure longitudinal skeleton, a bottom structure transverse thick skeleton and a bottom structure transverse thin skeleton, the bottom structure transverse thick skeleton and the bottom structure transverse thin skeleton are arranged in pairs, the two ends of the bottom structure longitudinal skeleton are welded respectively to form a bottom structure frame, and the bottom structure transverse thin skeleton is inserted into the bottom structure transverse thick skeleton and is fixed through a positioning pin.

The supporting structure comprises supporting structure vertical framework sleeves, supporting structure vertical frameworks and supporting structure transverse connecting frameworks, the supporting structure transverse connecting frameworks are connected between the two supporting structure vertical frameworks, the lower ends of the supporting structure vertical frameworks are connected with the supporting structure vertical framework sleeves, the supporting structure vertical framework sleeves are sleeved on the bottom structure vertical frameworks and fixed through positioning pins,

the vertical supporting structure formed by combining the supporting structure vertical framework sleeve, the supporting structure vertical framework and the supporting structure transverse connecting framework can be folded in a rotating mode through the supporting structure vertical framework sleeve.

The upper structure comprises a transverse fine framework of the upper structure, a transverse coarse framework of the upper structure, a vertical supporting framework of the upper structure and an upper structure connecting bent pipe, the vertical supporting framework of the upper structure is inserted on the vertical framework of the supporting structure and is fixed through a positioning pin, the upper end of the vertical supporting framework of the upper structure is provided with the transverse fine framework of the upper structure or the transverse coarse framework of the upper structure through the upper structure connecting bent pipe, and the transverse fine framework of the upper structure is inserted into the transverse coarse framework of the upper structure in opposite direction and is fixed through the positioning pin.

The upper structure is provided with a bearing platform steel plate, one end of the bottom surface of the bearing platform steel plate is provided with a steel groove and a transverse fine framework of the upper structure on one side, the steel groove and the transverse fine framework of the upper structure on one side are matched and fixed through a positioning pin, the other end of the bearing platform steel plate is lapped on the transverse fine framework of the upper structure on the other side, and the infrared range finder is arranged on the bearing.

The infrared distance measuring instrument and the data processor are placed on the mounting hole of the bearing platform steel plate and are fixed and leveled through the fixing and leveling system of the infrared distance measuring instrument, and the data processor is responsible for processing and recording the relative displacement, the track gauge and the superelevation of the trolley.

The gyro wheel includes work limit wheel pair and rail face wheel pair, the four corners outside at the substructure is installed to the rail face wheel pair, the work limit wheel pair passes through gauge and displacement sensor and installs at the substructure downside, control and connect through the hydraulic pressure vaulting pole between two gauge and the displacement sensor, the hydraulic pressure vaulting pole passes the horizontal thick skeleton of substructure and the horizontal thin skeleton of substructure, the horizontal thick skeleton of substructure and the horizontal thin skeleton of substructure are the tubular structure, the hydraulic pressure vaulting pole props the work limit wheel pair toward outer, ensure that rail work limit wheel pair hugs closely the rail all the time.

And the ultrahigh sensor, the compression degree of the hydraulic support rod and the set starting point relative displacement are transmitted into the data processor through the data line, and the track gauge data at the mileage position are comprehensively calculated through the data processor.

A method for using a subway evacuation platform clearance detection device comprises the following steps:

after the construction of laying short rails of the subway is completed, assembling and fixing the limit detection device of the adjustable subway evacuation platform, installing the limit detection device on a rail of a track line, installing a gauge and displacement sensor, an ultrahigh sensor, an infrared horizontal distance meter and a data processor, and leveling and fixing the infrared horizontal distance meter according to the designed gauge of the track and the designed elevation value of the evacuation platform.

And secondly, opening the infrared horizontal distance meter, emitting a horizontal line and a longitudinal vertical line on the wall surface, marking the two vertical lines as the height points of the evacuation platform to be measured on the wall surface by using tools such as a stone pen, a signal pen and the like, lofting and marking the wall surface according to the designed length of the single evacuation platform, recording the actually measured distance from each marked point to the center of the track line, and recording the specific mileage data and inclination angle data of each measuring point.

And thirdly, calculating a limit value of each position through a line design vehicle model, a design speed per hour, line superelevation and a corresponding equipment limit calculation formula, subtracting a theoretical limit value from a limit actual measurement record value to obtain limit widths of the evacuation platform footplate and the evacuation platform bracket, collecting and arranging related data, and transmitting the data to an evacuation platform manufacturer for transportation to a construction site for installation after the evacuation platform footplate is produced.

The invention has the beneficial effects that: compared with the prior art, the design scheme of the device structure provided by the invention can conveniently and quickly realize the actual measurement of the geometric dimension of the subway track and the accurate limit value of the installation of the subway evacuation platform, and improves the production and installation efficacy of accessories of the evacuation platform; the device is safe and simple to operate, and the structure processing and manufacturing cost is low. The invention can conveniently realize the actual measurement of the geometric dimension of the subway track line and the accurate limit value of the installation of the subway evacuation platform through the improved small flat car, the gauge and displacement sensor, the ultrahigh sensor, the data processor and the infrared horizontal distance meter, and has the characteristics of simple structure, safe and rapid operation and use.

Compared with the prior device, the detection device has the advantages that:

firstly, after the short rail of the subway is laid, the geometric dimension of the rail only meets the operation of an engineering working rail car, the geometric dimension of the rail at the stage is larger than the limit, the existing limit measuring device of the evacuation platform only can measure the limit of the evacuation platform under the central line of the rail at the stage, the limit of each evacuation platform is different, but the limit value cannot be accurately positioned by using the existing limit measuring equipment, the rail line at the later stage also needs to be accurately adjusted, particularly, after the short rail is laid, seamless line long rail welding is needed, after a plurality of construction procedures, and finally delivery operation is carried out, the change of the geometric dimension of the rail after the accurate adjustment and the geometric dimension of the rail before the accurate adjustment is larger, after the evacuation platform is installed according to the limit value of the evacuation platform actually measured under the geometric dimension of the rail at the original short rail laying stage, the measurement error of the limit value of the evacuation platform, the deviation of the geometric dimension of the rail, When the evacuation platform limit is detected, the risk of line invasion exists. By the subway evacuation platform limit detection device, relevant data of the track geometric dimension (including track gauge, superelevation and mileage position) in the short track laying stage can be measured actually, a theoretical evacuation platform limit value under the condition of the designed track geometric dimension is calculated, the limit value is accurately positioned, the risk of line intrusion of an evacuation platform is completely avoided, and the installation precision of the evacuation platform is improved.

The detection device can be applied to the use requirements under different scenes, the transverse distance of the device is adjustable, the steel rail working edge wheel pair is convenient to install on the steel rail, and meanwhile, the detection device can also be applied to steel rails with different gauges. The height of the device can be adjusted up and down, and the position of the infrared horizontal distance meter can be adjusted transversely. The disassembly is convenient after the use is finished, and each assembly can be folded after the disassembly, thereby only occupying a small space. The conventional evacuation platform limit measuring device cannot be telescopically adjusted, and compared with the evacuation platform limit measuring device, the evacuation platform limit measuring device is limited in use scene, large in occupied space and inconvenient to transport.

Drawings

FIG. 1 is a perspective view of the structure of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a side view of the present invention.

FIG. 4 is a top view of the present invention.

FIG. 5 is a structural view of a steel plate for a bearing platform according to the present invention.

Fig. 6 is a plan view of the cap steel plate.

Fig. 7 is an adjusting and mounting view of the upper telescopic frame of the present invention.

FIG. 8 is an adjusting and mounting view of the base telescopic frame of the present invention.

FIG. 9 is a structural mounting diagram of the gauge and displacement sensor of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1: as shown in fig. 1-8, a subway evacuation platform limit detection device comprises aroller 1, aroller 2, a track gauge anddisplacement sensor 4, anultrahigh sensor 20, adata processor 19 and aninfrared distance meter 18, wherein theroller 1, theroller 2, the track gauge anddisplacement sensor 4 and theultrahigh sensor 20 are arranged on a bottom structure, the bottom structure is composed of a left half frame structure and a right half frame structure, and the left and right spacing can be adjusted; supporting structures are installed on two sides of the bottom structure, a telescopic upper structure is installed on the top of the supporting structure, the upper structure is composed of a framework with an adjustable distance between a left half and a right half, and adata processor 19 and aninfrared range finder 18 are installed on the upper structure.

Further, the gauge anddisplacement sensor 4 includes ahydraulic stay 22 and adata line 21.

Further, theultra-high sensor 20 includes adata line 21.

Further, the bottom structure includes the horizontal thick skeleton ofbottom structure 6, the horizontalthick skeleton 11 of bottom structure and the horizontalthin skeleton 5 of bottom structure, and the horizontalthick skeleton 11 of bottom structure and the horizontalthin skeleton 5 of bottom structure lay in pairs, and thevertical skeleton 6 of bottom structure is welded respectively at both ends, constitutes the bottom structure frame, and the horizontalthin skeleton 5 of bottom structure inserts in the horizontalthick skeleton 11 of bottom structure and fixes through locatingpin 3.

Further, the supporting structure comprises a supporting structurevertical framework sleeve 10, supporting structurevertical frameworks 7 and a supporting structure transverse connectingframework 8, the supporting structure transverse connectingframework 8 is connected between the two supporting structurevertical frameworks 7, the lower ends of the supporting structurevertical frameworks 7 are connected with the supporting structurevertical framework sleeve 10, the supporting structurevertical framework sleeve 10 is sleeved on the bottom structurelongitudinal framework 6 and is fixed through apositioning pin 3,

furthermore, the vertical supporting structure formed by combining the supporting structurevertical framework sleeve 10, the supporting structurevertical framework 7 and the supporting structure transverse connectingframework 8 can be folded in a rotating mode through the supporting structurevertical framework sleeve 10.

Further, the superstructure includes horizontalthin skeleton 14 of superstructure, the horizontalthick skeleton 15 of superstructure, superstructurevertical support skeleton 12 and superstructureconnection return bend 13, superstructurevertical support skeleton 12 is inserted on bearing structurevertical skeleton 7 and is fixed through locatingpin 3, superstructurevertical support skeleton 12 upper end is through the horizontalthin skeleton 14 of superstructure or the horizontalthick skeleton 15 of superstructure installation of superstructureconnection return bend 13, the horizontalthin skeleton 14 of superstructure inserts in the horizontalthick skeleton 15 of subtend superstructure and fixes with locatingpin 3.

Furthermore, asteel groove 17 is arranged at one end of the bottom surface of the upper structure mounting bearingplatform steel plate 16, the upper structure transversethin framework 14 at one side is matched and fixed through thepositioning pin 3, the other end of the upper structure transversethin framework 14 at the other side is lapped on, and the infrareddistance measuring instrument 18 and thedata processor 19 are mounted on the bearingplatform steel plate 16.

Further, aninfrared distance meter 18 and adata processor 19 are placed on a mounting hole of the bearingplatform steel plate 16 and are fixed and leveled through a self-contained fixing and leveling system of theinfrared distance meter 18, and thedata processor 19 is responsible for processing and recording the relative displacement, the track gauge and the superelevation of the trolley.

Further, the roller comprises a workingedge wheel set 1 and a railface wheel set 2, the railface wheel set 2 is installed on the outer sides of four corners of the bottom structure, the workingedge wheel set 1 is installed on the lower side of the bottom structure through a rail gauge anddisplacement sensor 4, the workingedge wheel set 1 is always outwards supported through a pair of rail gauge and displacement sensorhydraulic support rods 22 perpendicular to the line direction, the steel rail workingedge wheel set 1 is guaranteed to be always attached to a steel rail, meanwhile, anultrahigh sensor 20, a compression degree of thehydraulic support rods 22 and a set starting point relative displacement are transmitted into adata processor 19 through asensor data line 21, rail gauge data of the mileage position are comprehensively calculated through thedata processor 19, theultrahigh sensor 20 is an inclination angle sensor, and ultrahigh can be calculated through measuring an inclination angle and combining with the.

A method for using a subway evacuation platform clearance detection device comprises the following steps:

after the construction of laying the short subway rails is completed, assembling and fixing the subway evacuation platform limit detection device, installing the subway evacuation platform limit detection device on a rail of a railway line, setting and adjusting the evacuation platform according to the designed elevation value of the evacuation platform relative to the rail surface, and leveling and fixing the infrared horizontal distance meter and the data processor.

And secondly, opening the infrared horizontal distance measuring instrument and the data processor, emitting a horizontal line and a longitudinal vertical line on the wall surface, marking the height points of the evacuation platform at the detected positions by two line vertical points through tools such as a stone pen, a signal pen and the like on the wall surface, setting out and marking on the wall surface according to the designed length of a single evacuation platform, recording the actual measurement distance from each mark point to the center of the track line, and recording the actual measurement distance on a computer of the data processor.

And thirdly, calculating a limit value of each position by combining the actually measured track gauge, the actually measured ultrahigh speed, the actually measured mileage and a corresponding equipment limit calculation formula through line design vehicle models, design elevation and design ultrahigh speed, and subtracting a theoretical limit value from a limit actually measured record value to obtain limit widths of the evacuation platform footplate and the evacuation platform bracket, collecting and arranging related data, and sending the data to an evacuation platform manufacturer to transport the evacuation platform footplate to a construction site for installation after the evacuation platform footplate is produced.

By adopting the device structure design scheme provided by the invention, the actual measurement of the geometrical size of the subway track and the accurate limit value of the installation of the subway evacuation platform can be conveniently and quickly realized, and the production and installation effects of the evacuation platform accessories are improved; the device is safe and simple to operate, and the structure processing and manufacturing cost is low. The invention can conveniently realize the actual measurement of the geometric dimension of the subway track line and the accurate limit value of the installation of the subway evacuation platform through the improved small flat car, the gauge and displacement sensor, the ultrahigh sensor, the data processor and the infrared horizontal distance meter, and has the characteristics of simple structure, safe and rapid operation and use.

Compared with the prior device, the detection device has the advantages that:

firstly, after the short rail of the subway is laid, the geometric dimension of the rail only meets the operation of an engineering working rail car, the geometric dimension of the rail at the stage is larger than the limit, the existing limit measuring device of the evacuation platform only can measure the limit of the evacuation platform under the central line of the rail at the stage, the limit of each evacuation platform is different, but the limit value cannot be accurately positioned by using the existing limit measuring equipment, the rail line at the later stage also needs to be accurately adjusted, particularly, after the short rail is laid, seamless line long rail welding is needed, after a plurality of construction procedures, and finally delivery operation is carried out, the change of the geometric dimension of the rail after the accurate adjustment and the geometric dimension of the rail before the accurate adjustment is larger, after the evacuation platform is installed according to the limit value of the evacuation platform actually measured under the geometric dimension of the rail at the original short rail laying stage, the measurement error of the limit value of the evacuation platform, the deviation of the geometric dimension of the rail, When the evacuation platform limit is detected, the risk of line invasion exists. By the subway evacuation platform limit detection device, relevant data of the track geometric dimension (including track gauge, superelevation and mileage position) in the short track laying stage can be measured actually, a theoretical evacuation platform limit value under the condition of the designed track geometric dimension is calculated, the limit value is accurately positioned, the risk of line intrusion of an evacuation platform is completely avoided, and the installation precision of the evacuation platform is improved.

The detection device can be applied to the use requirements under different scenes, the transverse distance of the device is adjustable, the steel rail working edge wheel pair is convenient to install on the steel rail, and meanwhile, the detection device can also be applied to steel rails with different gauges. The height of the device can be adjusted up and down, and the position of the infrared horizontal distance meter can be adjusted transversely. The disassembly is convenient after the use is finished, and each assembly can be folded after the disassembly, thereby only occupying a small space. The conventional evacuation platform limit measuring device cannot be telescopically adjusted, and compared with the evacuation platform limit measuring device, the evacuation platform limit measuring device is limited in use scene, large in occupied space and inconvenient to transport.

The present invention is not described in detail, but is known to those skilled in the art. Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. The utility model provides a subway evacuation platform limit detection device, includes gyro wheel, gauge and displacement sensor (4), superelevation sensor (20), data processor (19) and infrared ray distancer (18), its characterized in that: the roller, the gauge and displacement sensor (4) and the ultrahigh sensor (20) are arranged on a bottom structure, and the bottom structure consists of a left half frame structure and a right half frame structure, so that the left-right distance can be adjusted; supporting structure is installed to bottom structure both sides, and telescopic superstructure is installed at the supporting structure top, and superstructure comprises the skeleton that the interval is adjustable of the left and right halves, and superstructure goes up installation data processor (19) and infrared range finder (18).

2. The metro evacuation platform clearance detection device of claim 1, wherein: the ultra-high sensor (20) comprises a data line (21), and the track gauge and displacement sensor (4) comprises a hydraulic support rod (22) and the data line (21).

3. The metro evacuation platform clearance detection device of claim 1, wherein: the bottom structure comprises a bottom structure longitudinal skeleton (6), a bottom structure transverse thick skeleton (11) and a bottom structure transverse thin skeleton (5), the bottom structure transverse thick skeleton (11) and the bottom structure transverse thin skeleton (5) are arranged in pairs, the two ends of the bottom structure transverse thick skeleton (6) are welded respectively to form a bottom structure frame, and the bottom structure transverse thin skeleton (5) is inserted into the bottom structure transverse thick skeleton (11) and is fixed through a positioning pin (3).

4. A subway evacuation platform clearance detection device according to claim 3, wherein: the supporting structure comprises supporting structure vertical framework sleeves (10), supporting structure vertical frameworks (7) and supporting structure transverse connection frameworks (8), the supporting structure transverse connection frameworks (8) are connected between the two supporting structure vertical frameworks (7), the lower ends of the supporting structure vertical frameworks (7) are connected with the supporting structure vertical framework sleeves (10), and the supporting structure vertical framework sleeves (10) are sleeved on the bottom structure vertical frameworks (6) and are fixed through positioning pins (3).

5. The subway evacuation platform clearance detection device of claim 4, wherein: the vertical supporting structure formed by combining the supporting structure vertical framework sleeve (10), the supporting structure vertical framework (7) and the supporting structure transverse connecting framework (8) can be rotationally folded through the supporting structure vertical framework sleeve (10).

6. The subway evacuation platform clearance detection device of claim 5, wherein: the upper structure comprises an upper structure transverse thin framework (14), an upper structure transverse thick framework (15), an upper structure vertical supporting framework (12) and an upper structure connecting bent pipe (13), the upper structure vertical supporting framework (12) is inserted on a supporting structure vertical framework (7) and is fixed through a positioning pin (3), the upper structure vertical supporting framework (12) is installed at the upper end of the upper structure transverse thin framework (14) or the upper structure transverse thick framework (15) through the upper structure connecting bent pipe (13), and the upper structure transverse thin framework (14) is inserted into the opposite upper structure transverse thick framework (15) and is fixed through the positioning pin (3).

7. The subway evacuation platform clearance detection device of claim 6, wherein: the upper structure is provided with a bearing platform steel plate (16), one end of the bottom surface of the bearing platform steel plate (16) is provided with a steel groove (17) which is matched with the transverse fine framework (14) of the upper structure on one side and is fixed by a positioning pin (3), the other end of the bearing platform steel plate is lapped on the transverse fine framework (14) of the upper structure on the other side, and an infrared distance meter (18) and a data processor (19) are arranged on the bearing platform steel plate (16).

8. A subway evacuation platform clearance detection apparatus as claimed in claim 7, wherein: the infrared distance measuring instrument (18) and the data processor (19) are placed on the mounting hole of the bearing platform steel plate (16) and are fixed and leveled through the infrared distance measuring instrument (18) with a fixing and leveling system, and the data processor (19) is responsible for processing and recording the relative displacement, the track gauge and the superelevation of the trolley.

9. A subway evacuation platform clearance detection apparatus according to any one of claims 1-8, wherein: the idler wheel comprises a working edge wheel set (1) and a rail face wheel set (2), the rail face wheel set (2) is installed on the outer side of four corners of the bottom structure, the working edge wheel set (1) is installed on the lower side of the bottom structure through a gauge and displacement sensor (4), the left gauge and the right gauge and displacement sensor (4) are connected through a hydraulic support rod (22), the hydraulic support rod (22) penetrates through a bottom structure transverse thick framework (11) and a bottom structure transverse thin framework (5), the bottom structure transverse thick framework (11) and the bottom structure transverse thin framework (5) are both of tubular structures, the hydraulic support rod (22) supports the working edge wheel set (1) outwards to ensure that the rail working edge wheel set (1) is tightly attached to a rail all the time, the ultrahigh sensor (20), the compression degree and the relative displacement of a set starting point of the hydraulic support rod (22) are transmitted into the data processor (19) through a data line (, and the track gauge and the ultrahigh data at the mileage are comprehensively calculated by a data processor (19).

10. A subway evacuation platform clearance detection apparatus according to claim 9, characterized in that the method steps used are:

after the construction of laying short rails of a subway is completed, assembling and fixing a subway evacuation platform limit detection device, installing the subway evacuation platform limit detection device on a rail of a track line, installing a gauge and displacement sensor (4), an ultrahigh sensor (20), an infrared horizontal distance meter (18) and a data processor (19), and leveling and fixing the infrared horizontal distance meter (18) according to the designed gauge of the track and the designed elevation value of an evacuation platform;

turning on the infrared horizontal distance measuring instrument, emitting a horizontal line and a longitudinal vertical line on the wall surface, marking the two vertical lines as the height points of the evacuation platform to be measured on the wall surface by using tools such as a stone pen, a signal pen and the like, lofting and marking the wall surface according to the designed length of a single evacuation platform, recording the actually measured distance from each marked point to the center of the track line, and recording the specific mileage data and inclination angle data of each measuring point;

and thirdly, calculating a limit value of each position through a line design vehicle model, a design speed per hour, line superelevation and a corresponding equipment limit calculation formula, subtracting a theoretical limit value from a limit actual measurement record value to obtain limit widths of the evacuation platform footplate and the evacuation platform bracket, collecting and arranging related data, and transmitting the data to an evacuation platform manufacturer for transportation to a construction site for installation after the evacuation platform footplate is produced.

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