Subway prefabricated rubber spring floating slab digital laying construction method

Abstract

The invention discloses a digital laying construction method for subway prefabricated rubber spring floating slabs, and relates to the technical field of rail transit. Comprising the following steps: S1, construction preparation; s2, binding and pouring steel bars of a base; s3, measuring the flatness of the substrate; s4, digitally measuring and positioning a floating slab line; s5, roughly paving the floating slabs; s6, primarily measuring the jacking amount of the floating slab vibration isolator; s7, the floating slab is finely adjusted; S8, an adjusting base plate is installed, and limiting boss steel bars are bound and poured; and S9, steel rail fastener installation and rail fine adjustment. The digital laying technology is adopted for controlling all links of laying, the problems existing in floating slab track bed construction are effectively solved, accurate positioning of the floating slabs is achieved, the track precision is improved, the situation that due to floating slab laying precision deviation, a large amount of rework is caused, and the smoothness index cannot meet the requirement in the operation period is avoided, and the construction efficiency is improved. The construction period and cost are saved for construction, the maintenance cost within the guarantee period is reduced, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit, and in particular to a digital laying construction method for a subway prefabricated rubber spring floating slab. Background Art

[0002] Urban rail transit has been rapidly developed in major cities due to its advantages such as speed, comfort and large passenger capacity. Among them, prefabricated rubber spring floating slabs, as a new form of special vibration and noise reduction for subway tracks, have been gradually promoted and applied in many cities across the country. The laying accuracy of floating slabs plays a decisive role in the safety and comfort of train operation. In the past, the method of simply using track inspection instruments instead of track fine-tuning to prefabricate slabs was prone to a series of problems such as uneven force on the isolators, misalignment of the slabs, large amount of later rail fine-tuning, and poor driving comfort.

[0003] The construction process in the prior art is: pouring the base → measuring the flatness of the base → laying out the edge of the floating plate → rough laying of the floating plate → installing rail buckle accessories → fine-tuning the floating plate rails → installing vibration isolators and locking → pouring the limit bosses. The construction method using the prior art has the following problems: installing rails and rail buckles on the laid prefabricated plates, fine-tuning the tracks, and there are errors relative to the laying of the floating plates after fine-tuning. Since all the floating plates are prefabricated in the form of straight plates, there are serious misalignments of the floating plates after the adjustment of the rails in the curved sections, and the rails of each plate are twisted. During the fine-tuning process, the tracks have false data due to the buckle pressure and the influence of the rails of the front and rear plates, resulting in a large amount of fine-tuning during the later operation of the adjusted floating plates, unevenness, and shaking of the car. Summary of the invention

[0004] The main purpose of the present invention is to provide a digital laying construction method for subway prefabricated rubber spring floating plates, so as to overcome the problems existing in the prior art, realize the precise positioning of the floating plates, improve the accuracy of the tracks, avoid a large amount of rework caused by the precision deviation of the laying of the floating plates and the failure to meet the smoothness index requirements during operation, save construction time and cost, reduce maintenance costs during the warranty period, and reduce operation and maintenance costs.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A digital laying construction method for a subway prefabricated rubber spring floating slab comprises the following steps:

[0007] S1. Construction preparation;

[0008] S2, base reinforcement binding and pouring;

[0009] S3, substrate flatness measurement;

[0010] S4. Digital measurement and positioning of floating slab lines: Use digital slab laying software to calculate the design parameters of each floating slab, use instruments to accurately measure the slab lines, and lay out the center line, slab end line and both side lines of each floating slab. After the measurement, use ink lines to mark the outline of each slab as a reference line before the rough laying of the rubber spring floating slab;

[0011] S5, rough laying of floating slab;

[0012] S6. Preliminary measurement of the lifting amount of the floating plate isolator;

[0013] S7, floating plate fine adjustment:

[0014] S71. The total station is set up near the center line of the line, in the middle of the track foundation control points to be observed. The instrument is leveled and atmospheric correction is performed before installation. The track foundation control points to be observed are not less than three pairs. After changing the measuring station, the adjacent measuring stations shall have at least one pair of overlapping control points.

[0015] S72. After the free station setting of the total station is completed, a measuring frame is installed on the second rail support fastener sleeve at both ends of the floating plate, and a prism is installed on the measuring frame, and the reflecting surface of the prism faces the total station;

[0016] S73, four jacking holes are reserved on the surface of each rubber spring floating plate to prevent the vibration isolator from being affected and reducing the work efficiency during jacking. The hydraulic jacking regulator is used to jack up four points at the same time according to the position of the jacking holes;

[0017] S74. When fine-tuning, adjust the horizontal position first, then adjust the elevation. When adjusting the height, add the prefabricated rubber spring floating plate and the vibration isolator adjustment gasket at one time, and then make a preliminary measurement. Adjust the floating plate according to the measurement data displayed on the computer or the instructions issued. When adjusting the elevation, avoid stress on a single adjuster. When adjusting the level, adjust the left and right sides in the same direction. If the fine-tuned floating plate is continued to operate continuously, the previous floating plate must be overlapped and rechecked. The relative height difference of the top surface of the rail support platform at the joint of adjacent floating plates should not exceed 0.5mm, and then fine-tune the next floating plate.

[0018] S75. Install the vibration isolator and height adjustment shims. When the floating plate is adjusted to the right position, use the positioning plate with holes to drill holes in the positioning pin drill position, and drive the positioning pin into the center of each vibration isolator. After the positioning pin is installed, put the vibration isolator in. According to the measurement data, use the depth gauge to measure the number of adjustment shims, and then operate the regulator to insert the adjustment shims. Repeat the measurement of the floating plate rail support platform elevation 1 to 2 times, and use the adjustment shims to make up the elevation difference until the elevation meets the design requirements.

[0019] After the vibration isolator is installed, check the gap on the upper part of the vibration isolator to ensure that it is filled tightly. After the floating plate is accurately in place, the four lifting holes of each plate are lifted synchronously and pushed forward in parallel;

[0020] S8. Install the adjustment pad, limit boss reinforcement binding and pouring;

[0021] S9. Installation of rail fasteners and track fine-tuning.

[0022] Furthermore, the construction preparation in step S1 specifically includes the following contents:

[0023] S11. Review the design drawing parameters of the rubber spring floating slab, edit the main design parameters of the slab layout software, including the data required for line and track calculations, calculate the floating slab base and floating slab laying data, and compare with the expansion joints, drainage ditches, and civil air defense doors to avoid conflicts;

[0024] S12. The track foundation control network is measured and reported to a third party for measurement and evaluation;

[0025] S13. Design and manufacture matching measuring tooling equipment according to the drawings, and check the completed measuring tooling;

[0026] S14. Investigate the construction site and use the reserved feed openings of civil engineering as transportation channels for floating slabs, concrete, rails, fasteners, steel bars, and vibration isolators to ensure material supply;

[0027] S15. Organize management personnel and technical personnel to conduct training and explanation of the design drawings, master the requirements of each process in the design, perform actual operations on site, improve their proficiency, and meet the requirements for track laying.

[0028] Furthermore, the base reinforcement binding and pouring in step S2 specifically include the following contents:

[0029] The track foundation control network and track laying comprehensive diagram are used to measure the base control piles. Two pairs of elevation control piles are buried according to the length of the slab. The reinforcement binding and formwork installation are carried out with reference to the measured control piles. The roadbed base is set super high in the tunnel curve section. The surface flatness of the roadbed base is controlled during construction. The string wire mesh leveling method is used to level the base surface during concrete pouring. When the flatness of the previous base surface meets the requirements, move back and so on until the construction is completed.

[0030] Furthermore, the substrate flatness measurement in step S3 specifically includes the following contents:

[0031] After the base is poured, the elevation and levelness of the base section are re-measured, and the unsatisfactory parts are polished or chiseled off to ensure that the construction meets the flatness requirements of the rubber spring floating plate integral roadbed base.

[0032] Furthermore, step S5 of rough laying of floating slab specifically includes the following contents:

[0033] The floating slab is laid using a new energy track laying machine, using the four outer sleeves of the floating slab's vibration isolators as lifting points, equipped with lifting tools and four steel wire ropes connected together for lifting;

[0034] The precast slab is roughly laid on the floating slab according to the measured and laid-out position of the base. When laying, the base limiting boss steel bars are ensured in the curved section to avoid collision with the precast slab. The position of the precast slab edge line and the contour line of the base layout is controlled by a steel ruler. The rough laying accuracy error requires that the longitudinal and lateral positioning errors are within 3 to 5 mm.

[0035] Furthermore, step S6 of initially measuring the lifting amount of the floating plate isolator specifically includes the following contents:

[0036] After the floating plate is initially in place, open the isolator cover and use a total station to measure the base height of the isolator position. After the measurement is completed, import the isolator position base measurement data into the isolator position table provided by the prefabricated rubber spring floating plate track layout system, and configure the corresponding number of height adjustment pads for each isolator based on the deviation of the two sets of data.

[0037] Furthermore, step S8 of installing the adjustment pad, tying and pouring the limit boss reinforcement specifically includes the following contents:

[0038] S81. After fine-tuning each floating plate, place the locking pad and install the locking bolts. Apply butter on the bolt rod when installing the locking bolts. If the locking bolts are difficult to install, use fine-tuning gaskets and vibration isolators to solve the problem.

[0039] S82. Install the sealing strips on both sides and the seams of the plates. Before installing the sealing strips of the floating plates and the isolator cover, clean the garbage on both sides and the bottom of the plates. Use an endoscope to check the bottom of the plates one by one. Clean up the garbage and other objects in time. After cleaning, seal the sealing strips on both sides and the seams of the plates and install the isolator cover.

[0040] S83. Installation of elastic pads and casting of limit bosses. After the reinforcement is tied, install the elastic pads of the floating slab limit bosses, then tie the limit boss stirrups, seal the bottom with repair grouting material, and finally cast the limit bosses. The height of the limit bosses should be flush with the ballast bed surface.

[0041] Furthermore, step S9 of rail fastener installation and track fine-tuning specifically includes the following contents:

[0042] S91. Provide the initial height and level adjustment of each rail support fastener of the floating plate in the curved section according to the plate layout software, install non-standard track gauge blocks and height adjustment pads before track fine-tuning to improve the efficiency of track fine-tuning;

[0043] S92. When installing rails, special elevation control is performed on the transition curve section. In the transition curve section, the outer superelevation gradient changes, and the plate should be in a twisted state. Since the floating plate is prefabricated according to a plane, the floating plate is supported at three points. Adjustments are made through the pads under the rail or the pads under the plate to eliminate the stepped gradient of the superelevation of adjacent floating plates in the transition curve section, thereby achieving the smoothness of the track surface.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The quality problem of laying rubber spring floating slabs was effectively solved. The digital laying technology was mainly used to control each link of laying, which effectively solved the problems existing in the operation of floating slab ballast construction, saved the investment of personnel, materials and equipment for construction, and effectively guaranteed the construction nodes.

[0046] It achieves precise positioning of the floating plate, improves the accuracy of the track, avoids large amounts of rework caused by precision deviation in floating plate laying and failure to meet smoothness requirements during operation, saves construction time and costs, completes construction with high quality, reduces maintenance costs during the warranty period, and reduces operating and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is the overall construction flow chart of the present invention.

[0048] Figure 2 It is a schematic diagram of the string-net leveling control base of the present invention.

[0049] Figure 3 This is the measurement standard installation method and fine-tuning software usage process of the present invention.

[0050] Figure 4 It is a schematic diagram of the height adjustment amount of the fasteners of the floating slab support rail platform in the transition curve section of the present invention. DETAILED DESCRIPTION

[0051] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0052] Combination Figures 1 to 4 This embodiment provides a digital laying construction method for a subway prefabricated rubber spring floating slab, comprising the following steps:

[0053] S1. Construction preparation;

[0054] S2, base reinforcement binding and pouring;

[0055] S3, substrate flatness measurement;

[0056] S4. Digital measurement and positioning of floating slab lines: Use digital slab laying software to calculate the design parameters of each floating slab, use instruments to accurately measure the slab lines, and lay out the center line, slab end line and both side lines of each floating slab. After the measurement, use ink lines to mark the outline of each slab as a reference line before the rough laying of the rubber spring floating slab;

[0057] The rough laying parameters provided by the prefabricated rubber spring floating slab track layout system are as follows:

[0058]

[0059] S5, rough laying of floating slab;

[0060] S6. Preliminary measurement of the lifting amount of the floating plate isolator:

[0061] S7, floating plate fine adjustment:

[0062] S71. The total station is set up near the center line of the line, in the middle of the track foundation control points to be observed. The instrument is leveled and atmospheric correction is performed before installation. The track foundation control points to be observed are not less than three pairs. After changing the measuring station, the adjacent measuring stations shall have at least one pair of overlapping control points.

[0063] S72. After the free station setting of the total station is completed, a measuring frame is installed on the second rail support fastener sleeve at both ends of the floating plate, and a prism is installed on the measuring frame, and the reflecting surface of the prism faces the total station;

[0064] S73, four jacking holes are reserved on the surface of each rubber spring floating plate to prevent the vibration isolator from being affected and reducing the work efficiency during jacking. The hydraulic jacking regulator is used to jack up four points at the same time according to the position of the jacking holes;

[0065] S74. When fine-tuning, adjust the horizontal position first, then adjust the elevation. When adjusting the height, add the prefabricated rubber spring floating plate and the vibration isolator adjustment gasket at one time, and then make a preliminary measurement. Adjust the floating plate according to the measurement data displayed on the computer or the instructions issued. When adjusting the elevation, avoid stress on a single adjuster. When adjusting the level, adjust the left and right sides in the same direction. If the fine-tuned floating plate is continued to operate continuously, the previous floating plate must be overlapped and rechecked. The relative height difference of the top surface of the rail support platform at the joint of adjacent floating plates should not exceed 0.5mm, and then fine-tune the next floating plate.

[0066] S75. Install the vibration isolator and height adjustment shims. When the floating plate is adjusted to the right position, use the positioning plate with holes to drill holes in the positioning pin drill position, and drive the positioning pin into the center of each vibration isolator. After the positioning pin is installed, put the vibration isolator in. According to the measurement data, use the depth gauge to measure the number of adjustment shims, and then operate the regulator to insert the adjustment shims. Repeat the measurement of the floating plate rail support platform elevation 1 to 2 times, and use the adjustment shims to make up the elevation difference until the elevation meets the design requirements.

[0067] After the vibration isolator is installed, check the gap on the upper part of the vibration isolator to ensure that it is filled tightly. After the floating plate is accurately in place, the four lifting holes of each plate are lifted synchronously and pushed forward in parallel;

[0068] S8. Install the adjustment pad, limit boss reinforcement binding and pouring;

[0069] S9. Installation of rail fasteners and fine-tuning of tracks.

[0070] This solution places strict demands on the laying accuracy of prefabricated floating plates to ensure track accuracy and high smoothness. Digital laying technology is used to accurately adjust and position the prefabricated rubber spring floating plates, thereby solving the problems of isolator stress, precise positioning of prefabricated plates, and reducing the amount of track fine-tuning, thereby improving track accuracy and driving comfort.

[0071] In this embodiment, the construction preparation in step S1 specifically includes the following contents:

[0072] S11. Review the design drawing parameters of the rubber spring floating slab, edit the main design parameters of the slab layout software, including the data required for line and track calculations, calculate the floating slab base and floating slab laying data, and compare with the expansion joints, drainage ditches, and civil air defense doors to avoid conflicts;

[0073] S12. The track foundation control network is measured and reported to a third party for measurement and evaluation;

[0074] S13. Design and process the matching measuring tooling equipment according to the drawings, and check the completed measuring tooling;

[0075] S14. Investigate the construction site and use the reserved feed openings of civil engineering as transportation channels for floating slabs, concrete, rails, fasteners, steel bars, and vibration isolators to ensure material supply;

[0076] S15. Organize management personnel and technical personnel to conduct training and explanation of the design drawings, master the requirements of each process in the design, perform actual operations on site, improve their proficiency, and meet the requirements for track laying.

[0077] In this embodiment, the base reinforcement binding and pouring in step S2 specifically includes the following contents:

[0078] The track foundation control network and track laying comprehensive diagram are used to measure the base control piles. Two pairs of elevation control piles are buried according to the length of the plate. The reinforcement binding and template installation are constructed with reference to the measured control piles. The roadbed base is set superelevated in the tunnel curve section. The surface flatness of the roadbed base is controlled during construction. The string wire net leveling method is used to level the base surface during the concrete pouring process. When the flatness of the previous section of the base surface meets the requirements, move back and so on until the construction is completed. Figure 2 shown.

[0079] In this embodiment, the substrate flatness measurement in step S3 specifically includes the following contents:

[0080] After the base is poured, the elevation and levelness of the base section are re-measured, and the unsatisfactory parts are polished or chiseled off to ensure that the construction meets the flatness requirements of the rubber spring floating plate integral roadbed base.

[0081] Table 1 Substrate surface flatness requirements

[0082] Serial number project Allowable error 1 Base top elevation (general position) 0~-5mm 2 Base top elevation (vibration isolation support position) +0mm~-5mm 3 Base flatness (general position) ±4mm / m 4 Base flatness (vibration isolation support position) ±2mm

[0083] In this embodiment, step S5 of rough laying of floating slab specifically includes the following contents:

[0084] The floating slab is laid using a new energy track laying machine, using the four outer sleeves of the floating slab's vibration isolators as lifting points, equipped with lifting tools and four steel wire ropes connected together for lifting;

[0085] The precast slab is roughly laid on the floating slab according to the measured and laid-out position of the base. When laying, the base limiting boss steel bars are ensured in the curved section to avoid collision with the precast slab. The position of the precast slab edge line and the contour line of the base layout is controlled by a steel ruler. The rough laying accuracy error requires that the longitudinal and lateral positioning errors are within 3 to 5 mm.

[0086] In this embodiment, step S6 of initially measuring the lifting amount of the floating plate isolator specifically includes the following contents:

[0087] After the floating plate is initially in place, open the isolator cover and use a total station to measure the base height of the isolator position. After the measurement is completed, import the isolator position base measurement data into the isolator position table provided by the prefabricated rubber spring floating plate track layout system, and configure the corresponding number of height adjustment pads for each isolator based on the deviation of the two sets of data.

[0088] In this embodiment, step S8 of installing the adjustment pad, tying and pouring the limit boss reinforcement specifically includes the following contents:

[0089] S81. After fine-tuning each floating plate, place the locking pad and install the locking bolts. Apply butter on the bolt rod when installing the locking bolts. If the locking bolts are difficult to install, use fine-tuning gaskets and vibration isolators to solve the problem.

[0090] S82. Install the sealing strips on both sides and the seams of the plates. Before installing the sealing strips of the floating plates and the isolator cover, clean the garbage on both sides and the bottom of the plates. Use an endoscope to check the bottom of the plates one by one. Clean up the garbage and other objects in time. After cleaning, seal the sealing strips on both sides and the seams of the plates and install the isolator cover.

[0091] S83. Installation of elastic pads and casting of limit bosses. After the reinforcement is tied, install the elastic pads of the floating slab limit bosses, then tie the limit boss stirrups, seal the bottom with repair grouting material, and finally cast the limit bosses. The height of the limit bosses should be flush with the ballast bed surface.

[0092] In this embodiment, step S9 of rail fastener installation and track fine-tuning specifically includes the following contents:

[0093] S91. Provide the initial height and level adjustment of each rail support fastener of the floating plate in the curved section according to the plate layout software, install non-standard track gauge blocks and height adjustment pads before track fine-tuning to improve the efficiency of track fine-tuning;

[0094] S92. When installing rails, special elevation control is performed on the transition curve section. In the transition curve section, the outer superelevation gradient changes, and the plate should be in a twisted state. Since the floating plate is prefabricated according to a plane, the floating plate is supported at three points. Adjustments are made through the pads under the rail or the pads under the plate to eliminate the stepped gradient of the superelevation of adjacent floating plates in the transition curve section, thereby achieving the smoothness of the track surface.

[0095] The construction method of this embodiment is adopted. First, the theoretical data such as the floating plate configuration, base measurement and layout data, rough laying of the floating plate, and fine adjustment of the floating plate are calculated using the track layout. The base control piles and limit boss point positions are measured using the total station using the arbitrary station control network after the measurement and evaluation are completed. Then, the floating plate roadbed base is constructed and the limit boss steel bars are embedded, the center ditch template is installed, the base is poured and the base flatness is re-measured after pouring. After the base flatness is qualified, the floating plate is hoisted to the track area through the ground and roughly laid in place using the track laying machine. After the rough laying is completed, the total station and positioning prism system are used to measure and control the floating plate fine adjustment. The fine adjustment software data is imported into the laptop in advance to realize the data communication between the computer and the total station, and the digital control fine adjustment is realized. The on-site fine adjustment operation uses special vertical jacking and lateral hydraulic electric equipment to realize the precise positioning of the prefabricated plate, and then the vibration isolator is installed. After the re-measurement results are evaluated to be qualified, the vibration isolator is locked, the rail fasteners are installed, the limit boss is poured, and finally the prefabricated plate ditch observation hole cover and the sealing strips on both sides are installed. The retest data qualification rate of the rubber spring floating plate is 100%, the track TQI value is less than 6, and the track dynamic test passes the owner's acceptance at one time, which also has social and economic benefits.

[0096] Social benefits: The track engineering construction technology of digital laying of rubber spring floating plates has been summarized and improved, filling the gap in the improvement of construction accuracy of rubber spring floating plates. A group of technical backbones of digital laying of floating plates for track engineering construction have been cultivated, and a construction team with strong skills, strong sense of responsibility, hard work and good training has been trained. The laying accuracy of rubber spring floating plates has been improved, providing technical support for the development of the overall roadbed construction field of rubber spring floating plates in the future.

[0097] Economic benefits: The results of this study are directly used to guide actual engineering construction, ensuring the track construction quality of the Ningbo Rail Transit Line 3 Phase II project. The track accuracy is greatly improved, costs are saved, and work efficiency is improved.

[0098] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A digital laying construction method for subway prefabricated rubber spring floating slab, characterized in that: The following steps are involved: S1. Construction preparation; S2, base reinforcement binding and pouring; S3, substrate flatness measurement; S4. Digital measurement and positioning of floating slab lines: Use digital slab laying software to calculate the design parameters of each floating slab, use instruments to accurately measure the slab lines, and lay out the center line, slab end line and both side lines of each floating slab. After the measurement, use ink lines to mark the outline of each slab as a reference line before the rough laying of the rubber spring floating slab; S5, rough laying of floating slab; S6. Preliminary measurement of the lifting amount of the floating plate isolator; S7, floating plate fine adjustment: S71. The total station is set up near the center line of the line, in the middle of the track foundation control points to be observed. The instrument is leveled and atmospheric correction is performed before installation. The track foundation control points to be observed are not less than three pairs. After changing the measuring station, the adjacent measuring stations shall have at least one pair of overlapping control points. S72. After the free station setting of the total station is completed, a measuring frame is installed on the second rail support fastener sleeve at both ends of the floating plate, and a prism is installed on the measuring frame, and the reflecting surface of the prism faces the total station; S73, four jacking holes are reserved on the surface of each rubber spring floating plate to prevent the vibration isolator from being affected and reducing the work efficiency during jacking. The hydraulic jacking regulator is used to jack up four points at the same time according to the position of the jacking holes; S74. When fine-tuning, adjust the horizontal position first, then adjust the elevation. When adjusting the height, add the prefabricated rubber spring floating plate and the vibration isolator adjustment gasket at one time, and then make a preliminary measurement. Adjust the floating plate according to the measurement data displayed on the computer or the instructions issued. When adjusting the elevation, avoid stress on a single adjuster. When adjusting the level, adjust the left and right sides in the same direction. If the fine-tuned floating plate is continued to operate continuously, the previous floating plate must be overlapped and rechecked. The relative height difference of the top surface of the rail support platform at the joint of adjacent floating plates should not exceed 0.5mm, and then fine-tune the next floating plate. S75. Install the vibration isolator and height adjustment shims. When the floating plate is adjusted to the right position, use the positioning plate with holes to drill holes in the positioning pin drill position, and drive the positioning pin into the center of each vibration isolator. After the positioning pin is installed, put the vibration isolator in. According to the measurement data, use the depth gauge to measure the number of adjustment shims, and then operate the regulator to insert the adjustment shims. Repeat the measurement of the floating plate rail support platform elevation 1 to 2 times, and use the adjustment shims to make up the elevation difference until the elevation meets the design requirements. After the vibration isolator is installed, check the gap on the upper part of the vibration isolator to ensure that it is filled tightly. After the floating plate is accurately in place, the four lifting holes of each plate are lifted synchronously and pushed forward in parallel; S8. Install the adjustment pad, limit boss reinforcement binding and pouring; S9. Installation of rail fasteners and fine-tuning of tracks.

2. A digital laying construction method for subway prefabricated rubber spring floating slab according to claim 1, characterized in that: The construction preparation in step S1 specifically includes the following contents: S11. Review the design drawing parameters of the rubber spring floating slab, edit the main design parameters of the slab layout software, including the data required for line and track calculations, calculate the floating slab base and floating slab laying data, and compare with the expansion joints, drainage ditches, and civil air defense doors to avoid conflicts; S12. The track foundation control network is measured and reported to a third party for measurement and evaluation; S13. Design and manufacture matching measuring tooling equipment according to the drawings, and check the completed measuring tooling; S14. Investigate the construction site and use the reserved feed openings of civil engineering as transportation channels for floating slabs, concrete, rails, fasteners, steel bars, and vibration isolators to ensure material supply; S15. Organize management personnel and technical personnel to conduct training and explanation of the design drawings, master the requirements of each process in the design, perform actual operations on site, improve their proficiency, and meet the requirements for track laying.

3. A digital laying construction method for subway prefabricated rubber spring floating slab according to claim 1, characterized in that: The base reinforcement binding and pouring in step S2 specifically include the following contents: The track foundation control network and track laying comprehensive diagram are used to measure the base control piles. Two pairs of elevation control piles are buried according to the length of the slab. The reinforcement binding and formwork installation are carried out with reference to the measured control piles. The roadbed base is set super high in the tunnel curve section. The surface flatness of the roadbed base is controlled during construction. The string wire mesh leveling method is used to level the base surface during concrete pouring. When the flatness of the previous base surface meets the requirements, move back and so on until the construction is completed.

4. A digital laying construction method for subway prefabricated rubber spring floating slab according to claim 1, characterized in that: The substrate flatness measurement in step S3 specifically includes the following contents: After the base is poured, the elevation and levelness of the base section are re-measured, and the unsatisfactory parts are polished or chiseled off to ensure that the construction meets the flatness requirements of the rubber spring floating plate integral roadbed base.

5. The digital laying construction method of subway prefabricated rubber spring floating slab according to claim 1 is characterized in that: Step S5 of rough laying of floating slab specifically includes the following contents: The floating slab is laid using a new energy track laying machine, using the four outer sleeves of the floating slab's vibration isolators as lifting points, equipped with lifting tools and four steel wire ropes connected together for lifting; The precast slab is roughly laid on the floating slab according to the measured and laid-out position of the base. When laying, the base limiting boss steel bars are ensured in the curved section to avoid collision with the precast slab. The position of the precast slab edge line and the contour line of the base layout is controlled by a steel ruler. The rough laying accuracy error requires that the longitudinal and lateral positioning errors are within 3 to 5 mm.

6. The digital laying construction method of subway prefabricated rubber spring floating slab according to claim 1 is characterized in that: Step S6: Initial measurement of the lifting amount of the floating plate isolator specifically includes the following contents: After the floating plate is initially in place, open the isolator cover and use a total station to measure the base height of the isolator position. After the measurement is completed, import the isolator position base measurement data into the isolator position table provided by the prefabricated rubber spring floating plate track layout system, and configure the corresponding number of height adjustment pads for each isolator based on the deviation of the two sets of data.

7. A digital laying construction method for subway prefabricated rubber spring floating slab according to claim 1, characterized in that: Step S8: installing the adjustment pad, tying and pouring the limit boss reinforcement bars, specifically includes the following contents: S81. After fine-tuning each floating plate, place the locking pad and install the locking bolts. Apply butter on the bolt rod when installing the locking bolts. If the locking bolts are difficult to install, use fine-tuning gaskets and vibration isolators to solve the problem. S82. Install the sealing strips on both sides and the seams of the plates. Before installing the sealing strips of the floating plates and the isolator cover, clean the garbage on both sides and the bottom of the plates. Use an endoscope to check the bottom of the plates one by one. Clean up the garbage and other objects in time. After cleaning, seal the sealing strips on both sides and the seams of the plates and install the isolator cover. S83. Installation of elastic pads and casting of limit bosses. After the reinforcement is tied, install the elastic pads of the floating slab limit bosses, then tie the limit boss stirrups, seal the bottom with repair grouting material, and finally cast the limit bosses. The height of the limit bosses should be flush with the ballast bed surface.

8. The digital laying construction method of subway prefabricated rubber spring floating slab according to claim 1 is characterized in that: Step S9 rail fastener installation and track fine-tuning specifically includes the following contents: S91. Provide the initial height and level adjustment of each rail support fastener of the floating plate in the curved section according to the plate layout software, install non-standard track gauge blocks and height adjustment pads before track fine-tuning to improve the efficiency of track fine-tuning; S92. When installing rails, special elevation control is performed on the transition curve section. In the transition curve section, the outer superelevation gradient changes, and the plate should be in a twisted state. Since the floating plate is prefabricated according to a plane, the floating plate is supported at three points. Adjustments are made through the pads under the rail or the pads under the plate to eliminate the stepped gradient of the superelevation of adjacent floating plates in the transition curve section, thereby achieving the smoothness of the track surface.

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