Construction method of subway anti-vibration pad prefabricated slab ballast bed

Abstract

The invention discloses a subway anti-vibration pad prefabricated slab ballast bed construction method which comprises the steps that S1, it is ensured that the ground is flat before construction, a special tool is used for fixing an anti-vibration pad to a platform, and it is ensured that the position of the anti-vibration pad is accurate; s2, the prefabricated plate is turned over through a gantry crane, the bottom face of the prefabricated plate faces upwards, after the bottom face of the prefabricated plate is polished and cleaned, an anti-vibration pad is pasted to the bottom face of the prefabricated plate, the periphery of the prefabricated plate is sealed, the prefabricated plate is turned back after sealing is completed, and the prefabricated plate and the anti-vibration pad are firmly pressed through a pressing device in the tool; keeping the compressed state for a period of time to ensure the preliminary bonding between the anti-vibration pad and the prefabricated slab; according to the construction method of the subway anti-vibration pad prefabricated slab ballast bed, the problems that in the prior art, the construction time is increased, site construction management is complicated, and the anti-vibration effect is not ideal are solved.

Description

Technical Field

[0001] The invention relates to the technical field of track engineering, and in particular to a method for constructing a subway vibration damping pad prefabricated slab roadbed. Background Art

[0002] In existing subway construction, cast-in-place monolithic ballast has been widely used. However, this traditional process has significant disadvantages. First, the construction period of cast-in-place monolithic ballast is long, requiring complex processes such as steel bar binding, formwork erection and concrete pouring to be completed on site. The requirements for the construction environment are also relatively high, and it is easily affected by external factors such as weather and construction site conditions. In addition, during the cast-in-place construction process, the labor intensity of construction workers is high, and the quality control is difficult, which easily leads to uneven construction quality, thereby affecting the overall stability and durability of the subway track.

[0003] In response to these problems, new prefabricated slab roadbeds with vibration damping pads have gradually been used in subway construction. However, the traditional construction method of prefabricated slab roadbeds with vibration damping pads still has some shortcomings. The traditional method requires the tying of panel steel bars and the laying of vibration damping pads at the construction site, which not only increases the construction time but also complicates the on-site construction management. In addition, when laying vibration damping pads at the construction site, it is easily affected by factors such as uneven ground and complex construction environment, resulting in unsatisfactory vibration reduction effects, and may even have an adverse effect on the comfort and safety of subway operations. These defects show that although the existing prefabricated slab roadbeds with vibration damping pads have improved the shortcomings of cast-in-place integral roadbeds to a certain extent, there is still room for improvement in construction efficiency and construction quality control. Summary of the invention

[0004] The purpose of the present invention is to provide a method for constructing a subway vibration-damping pad prefabricated slab roadbed, so as to solve the problem that the prior art requires the tying of panel steel bars and the laying of vibration-damping pads at the construction site, which not only increases the construction time but also complicates the on-site construction management. When laying vibration-damping pads at the construction site, it is easily affected by factors such as uneven ground and complex construction environment, resulting in unsatisfactory vibration reduction effect, and may even have an adverse effect on the comfort and safety of subway operations.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for constructing a subway vibration damping pad prefabricated slab roadbed, the method comprising:

[0006] S1: Make sure the ground is flat before construction, and use special tooling to fix the vibration damping pad on the platform to ensure its accurate position;

[0007] S2: Use the gantry crane to turn over the prefabricated board so that the bottom of the prefabricated board faces upwards. After the bottom of the prefabricated board is polished and cleaned, a vibration-damping pad is pasted on the bottom of the prefabricated board and the surroundings are sealed. After the sealing is completed, the prefabricated board is turned back, and the prefabricated board and the vibration-damping pad are firmly pressed together using the pressing device in the tooling. The pressing state is maintained for a period of time to ensure the initial bonding between the vibration-damping pad and the prefabricated board.

[0008] S3: hoist the precast panel slowly to the predetermined position of the roadbed, perform preliminary positioning, check the height of the precast panel, if the height does not meet the requirements, make fine adjustments, check the horizontality of the precast panel, if the height does not meet the requirements, make fine adjustments, make fine adjustments to the inclination of the four corners of the precast panel, and re-measure after adjustment;

[0009] S4: After the precast panels are fine-tuned, temporary fixing devices are installed immediately to prevent the precast panels from moving or tilting during subsequent construction, and then the precast panels are permanently fixed.

[0010] Preferably, in step S1, the step of ensuring the flatness of the ground includes measuring the ground height difference using a laser level, and adjusting the ground flatness according to the measurement result so that the ground height difference is controlled within ±5 mm.

[0011] Preferably, the special tooling in step S1 comprises a positioning device and a clamping device, wherein the positioning device fixes the position of the vibration damping pad, and the clamping device firmly fixes the vibration damping pad on the platform.

[0012] Preferably, in step S2, the pressing device is a hydraulic pressing device, and the applied pressure ranges from 0.5 to 1.5 MPa.

[0013] Preferably, in step S3, the height adjustment of the prefabricated board is fine-tuned by using a tool, and the height adjustment is performed so that the height error of the prefabricated board is controlled within ±3 mm.

[0014] Preferably, in step S3, the levelness of the prefabricated board is detected by combining a level ruler and a laser measuring instrument, and the goal of adjusting the levelness is to control the level error of the prefabricated board within ±2 mm.

[0015] Preferably, in step S4, permanent fixing includes fixing the prefabricated panels on the ballast base with high-strength expansion bolts or embedded parts, and filling and sealing the fixing points with concrete.

[0016] Preferably, in step S3, the inclination of the prefabricated panel is detected and adjusted by the diagonal height difference, and the adjustment of the inclination controls the diagonal height difference within ±1 mm.

[0017] Preferably, during the fine adjustment process of step S3, a feeler gauge with an accuracy of 0.01 mm is used to detect the surface flatness of the prefabricated board to ensure that the surface flatness error of the prefabricated board does not exceed ±1 mm.

[0018] Preferably, the steps of fine-tuning the height, levelness and inclination are respectively completed by independent adjustment mechanisms, and the adjustment mechanisms include a hydraulic jack, a level adjustment pad and a precision adjustment bolt.

[0019] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0020] The subway vibration-damping pad prefabricated slab roadbed construction method greatly shortens the construction time and significantly improves the construction efficiency by eliminating the on-site steel bar binding and concrete pouring processes. The close fit between the vibration-damping pad and the prefabricated slab reduces the impact of uneven ground and environmental complexity, ensuring the consistency of the roadbed construction quality. Since the vibration-damping pad is directly connected to the prefabricated slab, the vibration-damping effect is more ideal, thereby improving the comfort and safety of subway operation. The problem that the prior art requires panel steel bar binding and vibration-damping pad laying at the construction site, which not only increases the construction time but also complicates on-site construction management, and that when laying the vibration-damping pad at the construction site, it is easily affected by factors such as uneven ground and complex construction environment, resulting in unsatisfactory vibration-damping effect, and may even have an adverse effect on the comfort and safety of subway operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, a method for constructing a subway vibration damping pad prefabricated slab roadbed comprises:

[0024] S1: Before construction, use a laser level to measure the ground height difference, and adjust the ground flatness according to the measurement results to ensure that the ground height difference is controlled within ±5mm. Then, use a special tool to fix the vibration damping pad on the platform to ensure that the position of the vibration damping pad is accurate. The special tool includes a positioning device and a clamping device. The positioning device is used to fix the position of the vibration damping pad, and the clamping device firmly fixes the vibration damping pad on the platform.

[0025] S2: Use the gantry crane to flip the precast panel so that the bottom of the precast panel faces upwards. After the bottom of the precast panel is polished and cleaned, a vibration-damping pad is pasted on the bottom of the precast panel and sealed on all sides. After the sealing is completed, the precast panel is flipped back and the clamping device in the tooling is used to firmly press the precast panel and the vibration-damping pad. Keep the clamping state for a while to ensure the initial bonding between the vibration-damping pad and the precast panel.

[0026] S3: The precast panels are slowly hoisted and placed at the predetermined position of the roadbed. After preliminary positioning, the height of the precast panels is fine-tuned using a hydraulic jack to control the height error within ±3mm. Afterwards, the levelness of the precast panels is detected and adjusted using a combination of a level ruler and a laser measuring instrument, with the goal of controlling the level error within ±2mm. In addition, the inclination of the precast panels is detected and adjusted by the diagonal height difference to ensure that the diagonal height difference after the inclination adjustment is controlled within ±1mm. Finally, during the fine-tuning process, a feeler gauge with an accuracy of 0.01mm is used to detect the surface flatness of the precast panels to ensure that the surface flatness error does not exceed ±1mm.

[0027] S4: After the precast panel is fine-tuned, install temporary fixings immediately to prevent the precast panel from moving or tilting during subsequent construction. Finally, use high-strength expansion bolts or embedded parts to permanently fix the precast panel to the ballast base, and fill and seal the fixing points with concrete.

[0028] This construction method ensures the installation accuracy of the subway vibration damping pad prefabricated slab roadbed by using precise measuring and adjusting equipment. Each step in the construction process is strictly controlled in height, level and inclination to ensure the overall flatness and stability of the roadbed. The initial bonding of the vibration damping pad and the prefabricated slab is achieved by a hydraulic clamping device, which not only ensures the vibration damping effect, but also ensures the stable installation of the prefabricated slab. Through this method, the installation accuracy of the subway vibration damping pad prefabricated slab roadbed is significantly improved, especially in terms of height, level and inclination control, ensuring the flatness and stability of the roadbed. At the same time, the use of special tooling and hydraulic clamping devices improves construction efficiency, reduces manual operation errors, and reduces the difficulty of later maintenance. In addition, the use of high-strength expansion bolts or embedded parts for permanent fixation improves the overall structural strength and service life of the roadbed.

[0029] Furthermore, in the present invention, different materials or equipment can be used for adjustment. For example, the pressure range of the hydraulic clamping device can be adjusted according to actual needs, or other types of clamping devices can be used in specific cases. In addition, the equipment for adjusting height, level and inclination can also be selected in different types according to specific construction requirements, such as using a mechanical adjustment device instead of a hydraulic jack, a level adjustment pad or a precision adjustment bolt.

[0030] In step S1, the step of ensuring the flatness of the ground includes measuring the ground height difference using a laser level, and adjusting the ground flatness according to the measurement results, so that the ground height difference is controlled within ±5mm. This embodiment uses a laser level to accurately measure the ground height difference before construction to obtain the flatness information of the ground. The ground flatness is adjusted according to the measurement data so that the ground height difference can be controlled within ±5mm. This can ensure that the basic conditions are stable when the vibration damping pads and prefabricated panels are installed later, thereby reducing the installation errors caused by uneven ground and ensuring the installation accuracy of the roadbed. Using a laser level to measure and adjust the ground flatness can significantly improve the construction accuracy and ensure that the ground flatness meets the requirements. This not only helps the subsequent accurate installation of vibration damping pads and prefabricated panels, but also reduces the workload of later adjustments and improves construction efficiency. In addition, this method reduces the risk of installation defects caused by uneven ground and ensures the long-term stability and durability of the roadbed.

[0031] Furthermore, in this embodiment, the use of the laser level can be adjusted according to specific construction requirements. For example, in some special occasions, other measuring devices such as an optical level or an electronic level can be used to replace the laser level. At the same time, the method of adjusting the flatness of the ground according to the measurement results can also be achieved by different tools or equipment, such as using a mechanical leveling device or a manual tool for fine adjustment.

[0032] The special tooling described in step S1 includes a positioning device and a clamping device, wherein the positioning device fixes the position of the vibration damping pad, and the clamping device firmly fixes the vibration damping pad on the platform. This embodiment uses special tooling during the installation of the vibration damping pad to achieve accurate positioning and firm fixation of the position of the vibration damping pad. The positioning device ensures that the vibration damping pad does not shift during installation, thereby ensuring the precise alignment of the vibration damping pad with the prefabricated plate. The clamping device firmly fixes the vibration damping pad on the platform by applying pressure, ensuring that the vibration damping pad will not move or deform due to external force during installation, thereby affecting the construction quality. The use of a special tooling including a positioning device and a clamping device effectively improves the accuracy and stability of the installation of the vibration damping pad. The positioning device ensures the position accuracy of the vibration damping pad, while the clamping device ensures the firmness of the fixation of the vibration damping pad, which not only improves the overall construction efficiency, but also reduces the quality problems caused by the displacement or loosening of the vibration damping pad in the later stage. At the same time, this method reduces the reliance on manual precision and reduces the risk of errors during the construction process.

[0033] Furthermore, in this embodiment, the design of the special tooling can be adjusted according to specific construction requirements. For example, the structure and type of the positioning device can be diversified, such as using an adjustable clamp or positioning pin to replace a fixed device. The clamping device can also use different clamping methods according to different installation requirements, such as mechanical clamping or pneumatic clamping, to adapt to different working conditions and vibration damping pad material requirements.

[0034] In step S2, the clamping device is a hydraulic clamping device, and the applied pressure range is 0.5-1.5MPa. During the construction process, the vibration damping pad and the prefabricated board are uniformly pressed by using the hydraulic clamping device. The device can be flexibly adjusted within the pressure range of 0.5-1.5MPa to ensure that a firm initial bond is formed between the vibration damping pad and the prefabricated board. The pressure adjustment function of the hydraulic clamping device allows construction personnel to select appropriate pressure values ​​according to different material properties and construction requirements, thereby ensuring that the bonding effect is as expected. The use of the hydraulic clamping device can achieve precise control of the pressure between the vibration damping pad and the prefabricated board to ensure the initial bonding effect between the two. This not only ensures the quality of construction, but also improves the safety and efficiency during the construction process. By adjusting the pressure range, it can adapt to the needs of different construction environments and materials, reducing the risk of poor bonding or excessive pressing. In addition, the hydraulic device is easy to operate and can significantly improve the degree of automation of the construction process.

[0035] Furthermore, the hydraulic clamping device can be replaced by other types of clamping devices, such as pneumatic clamping devices or mechanical clamping devices. These alternative devices can be selected and used according to the actual construction conditions and material properties. At the same time, the applied pressure range can also be adjusted according to specific construction requirements to ensure that the bonding effect between the vibration damping pad and the prefabricated panel is optimal. In addition, the structural form of the clamping device can also be diversified to adapt to different construction conditions.

[0036] In step S3, the height adjustment of the prefabricated panel is fine-tuned by using a tool, and the height adjustment controls the height error of the prefabricated panel within ±3mm. During the construction process, in order to ensure the height accuracy of the prefabricated panel installation, a hydraulic jack is used to fine-tune its height. The hydraulic jack can apply precise lifting force so that the prefabricated panel can be gradually adjusted to the ideal height during the installation process. Through this fine-tuning, the height error of the prefabricated panel can be controlled within ±3mm, ensuring the overall flatness and stability of the roadbed. The use of a hydraulic jack for height fine-tuning helps to accurately control the installation height of the prefabricated panel, thereby significantly improving the flatness and stability of the roadbed. This method can effectively reduce the later maintenance costs caused by height errors and ensure the smoothness of the subway train operation. In addition, the hydraulic jack is easy to operate, and the fine-tuning process is fast and efficient, which helps to shorten the construction period and improve the construction quality.

[0037] Furthermore, in addition to hydraulic jacks, other height adjustment devices such as mechanical jacks or electric lifts can be used to fine-tune the height of prefabricated panels. These alternative devices can also achieve precise control of the height of prefabricated panels, and appropriate equipment can be selected according to specific construction conditions. In addition, the adjustment accuracy and error range can also be further optimized according to actual needs to meet the requirements of different engineering projects.

[0038] In step S3, the levelness of the prefabricated board is detected by combining a level ruler and a laser measuring instrument. The goal of the level adjustment is to control the horizontal error of the prefabricated board within ±2mm. During the installation of the prefabricated board, in order to ensure that its level meets the design requirements, a level ruler and a laser measuring instrument are used to perform a joint detection. The level ruler provides a basic level reference, while the laser measuring instrument can accurately measure the slight inclination of the prefabricated board. Through the combined use of the two, the construction personnel can finely adjust the levelness of the prefabricated board, and finally control its level error within ±2mm. The combination of the level ruler and the laser measuring instrument for levelness detection can greatly improve the accuracy and construction efficiency of the prefabricated board installation. By strictly controlling the horizontal error, the flatness and structural stability of the roadbed are ensured, thereby improving the safety and stability of train operation. In addition, this detection method is relatively simple and easy to operate, which helps to reduce errors caused by human factors during the construction process.

[0039] Furthermore, the level detection equipment can be replaced or supplemented according to the actual construction conditions. For example, a total station or electronic level can be used instead of a laser measuring instrument to perform a more accurate level detection. In addition, the control target of the level error can be appropriately adjusted according to the specific project requirements. For example, in some cases, the level error can be controlled within a stricter range to meet specific accuracy requirements.

[0040] In the step S4, permanent fixation includes fixing the precast panel on the ballast bed base with high-strength expansion bolts or embedded parts, and filling and sealing the fixed points with concrete. After the final positioning and fine adjustment of the precast panel are completed, the precast panel is firmly fixed on the ballast bed base by using high-strength expansion bolts or embedded parts. The expansion bolts are fastened in the reserved holes through the expansion principle to provide a strong fixing force, while the embedded parts are pre-buried during the ballast bed construction and directly connected to the precast panel during installation to ensure stability. In order to further enhance the fixing effect, concrete is also used to fill and seal the fixed points during the construction process, which can prevent loosening and displacement, and improve the overall structural strength and durability of the ballast bed. The fixing method of high-strength expansion bolts or embedded parts combined with concrete filling and sealing can significantly improve the connection strength between the precast panel and the ballast bed base, and ensure the stability and durability of the ballast bed in long-term use. This fixing method not only improves the reliability of the overall structure, but also effectively prevents loosening problems caused by external vibration or long-term use. In addition, this method has strong tensile and shear resistance and is suitable for various complex subway operation environments.

[0041] Furthermore, in this embodiment, in addition to using high-strength expansion bolts or embedded parts, other types of fixing methods, such as chemical anchors or mechanical anchors, can also be used to select a suitable fixing solution according to specific construction requirements and substrate materials. At the same time, the filling material can also be replaced according to environmental conditions, such as using anti-crack mortar or corrosion-resistant filling materials in special environments to further improve the durability and environmental corrosion resistance of the fixing point.

[0042] In the step S3, the inclination of the prefabricated board is detected and adjusted by the height difference of the diagonal line. The adjustment of the inclination controls the height difference of the diagonal line within ±1mm. During the installation of the prefabricated board, in order to ensure that its inclination meets the design requirements, the diagonal height difference detection method is used for adjustment. The specific operation is to judge its inclination by measuring the height difference between the two diagonals of the prefabricated board. According to the detection results, corresponding adjustments are made to ensure that the height difference of the diagonal line is controlled within ±1mm, so that the surface of the prefabricated board remains horizontal, and the overall flatness and stability of the roadbed are ensured. The diagonal height difference detection and adjustment method can effectively control the inclination of the prefabricated board and ensure the accuracy of its installation. This method has the advantages of simple operation and high detection accuracy, can significantly reduce the installation error caused by the inclination, ensure the flatness and stability of the roadbed, and thus improve the safety and stability of the subway train operation. In addition, this method can quickly adjust the inclination, improve construction efficiency, and reduce the risk of rework caused by inclination problems.

[0043] Furthermore, the detection of diagonal height difference can be replaced by other methods according to actual construction needs, such as using precision measuring instruments to measure the inclination, or using a combination of a laser level and a total station to control the inclination. At the same time, the adjustment range of the inclination can be adjusted according to different engineering requirements to adapt to various construction environments and changes in the size of prefabricated panels, ensuring the final construction accuracy.

[0044] During the fine adjustment process of step S3, a feeler gauge with an accuracy of 0.01mm is used to detect the surface flatness of the prefabricated board to ensure that the surface flatness error of the prefabricated board does not exceed ±1mm. During the fine adjustment process of the prefabricated board, in order to ensure that the surface flatness meets the design requirements, a feeler gauge with an accuracy of 0.01mm is used to detect the surface of the prefabricated board. The feeler gauge is a very precise measuring tool that can detect tiny surface unevenness. During the fine adjustment process, the construction personnel use the feeler gauge to detect the surface of the prefabricated board point by point, and the error is controlled within ±1mm, thereby ensuring the overall flatness of the surface of the prefabricated board. The use of a high-precision feeler gauge for surface flatness detection can greatly improve the accuracy and quality of the installation of the prefabricated board. By strictly controlling the surface flatness error, not only can the flatness and aesthetics of the roadbed be ensured, but also the vibration and noise caused by the uneven roadbed during the operation of the train can be prevented. In addition, accurate surface flatness detection helps to reduce the frequency and cost of later maintenance and extend the service life of the roadbed.

[0045] Furthermore, in addition to using a feeler gauge with an accuracy of 0.01mm, other high-precision measuring tools such as electronic level or laser interferometer can be used to detect surface flatness. Depending on the actual construction needs and conditions, these alternative tools can provide the same or even higher measurement accuracy. In addition, the detection standard and error range can also be appropriately adjusted according to the specific project requirements to meet different quality control requirements.

[0046] The steps of fine-tuning the height, level and inclination are completed by independent adjustment mechanisms, which include hydraulic jacks, level adjustment pads and precision adjustment bolts. During the construction process, in order to ensure the installation accuracy of the prefabricated panels, independent adjustment mechanisms are used to fine-tune the height, level and inclination of the prefabricated panels. The fine-tuning of the height is achieved by hydraulic jacks, which can accurately control the height of the prefabricated panels. The adjustment of the level uses level adjustment pads, which are inserted or removed from the bottom of the prefabricated panels to fine-tune the level. The fine-tuning of the inclination relies on precision adjustment bolts, which are rotated to achieve subtle adjustments to the inclination of the prefabricated panels. This independent adjustment method can ensure that each adjustment step can meet the precise construction requirements. The use of independent adjustment mechanisms to fine-tune the height, level and inclination respectively helps to improve the accuracy and overall quality of the installation of the prefabricated panels. Each adjustment mechanism can accurately control the corresponding parameters to ensure that the installation of the prefabricated panels is in the best state and reduce the possibility of error accumulation. In addition, this adjustment method can simplify the construction process, improve construction efficiency, and reduce mutual interference during the adjustment process, thereby ensuring the flatness and stability of the roadbed.

[0047] Furthermore, the design of the independent adjustment mechanism can be replaced or deformed according to actual construction needs. For example, the hydraulic jack can be replaced by an electric lifting device, the horizontal adjustment pad can use pads of different materials or forms, and the precision adjustment bolt can use bolts of different specifications and materials according to needs. In addition, in some complex construction environments, these adjustment mechanisms can be combined with an automated control system to achieve higher precision and faster construction adjustment.

[0048] During the work process, a series of precise measurement and adjustment methods are used to ensure that the installation of the prefabricated slab roadbed achieves the best results. During the construction process, the height difference of the ground is first measured and adjusted using a laser level to ensure that the ground flatness is within the construction standard range. Subsequently, the vibration damping pad is accurately fixed on the platform using a special tool, and then the prefabricated slab and the vibration damping pad are firmly bonded using a hydraulic clamping device.

[0049] During the installation of the prefabricated panels, hydraulic jacks are used to fine-tune their height to keep the height error within ±3mm. Level rulers and laser measuring instruments are used to detect the levelness to ensure that the level error does not exceed ±2mm. The inclination of the prefabricated panels is further controlled by detecting and adjusting the diagonal height difference to ensure that the inclination error is within ±1mm. In addition, high-precision feeler gauges are used to fine-tune the surface flatness of the prefabricated panels to ensure that the error does not exceed ±1mm.

[0050] In order to ensure the permanent fixation of the precast panels, high-strength expansion bolts or embedded parts are used to firmly fix the precast panels to the roadbed base, and concrete is used to fill and seal the fixing points. Independent adjustment mechanisms fine-tune the height, horizontality and inclination respectively to ensure that each parameter meets strict construction standards. Ultimately, this construction method not only improves the installation accuracy of the precast panel roadbed, but also ensures the long-term stability and durability of the roadbed, adapting to the complex subway operation environment.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for constructing a subway vibration damping pad prefabricated slab roadbed, characterized in that: The method comprises: S1: Make sure the ground is flat before construction, and use special tooling to fix the vibration damping pad on the platform to ensure its accurate position; S2: Use the gantry crane to turn over the prefabricated board so that the bottom of the prefabricated board faces upwards. After the bottom of the prefabricated board is polished and cleaned, a vibration-damping pad is pasted on the bottom of the prefabricated board and the surroundings are sealed. After the sealing is completed, the prefabricated board is turned back, and the prefabricated board and the vibration-damping pad are firmly pressed together using the pressing device in the tooling. The pressing state is maintained for a period of time to ensure the initial bonding between the vibration-damping pad and the prefabricated board. S3: hoist the precast panel slowly to the predetermined position of the roadbed, perform preliminary positioning, check the height of the precast panel, if the height does not meet the requirements, make fine adjustments, check the horizontality of the precast panel, if the height does not meet the requirements, make fine adjustments, make fine adjustments to the inclination of the four corners of the precast panel, and re-measure after adjustment; S4: After the precast panels are fine-tuned, temporary fixing devices are installed immediately to prevent the precast panels from moving or tilting during subsequent construction, and then the precast panels are permanently fixed.

2. A subway vibration damping pad prefabricated slab roadbed construction method according to claim 1, characterized in that: In step S1, the step of ensuring the flatness of the ground includes measuring the ground height difference using a laser level and adjusting the ground flatness according to the measurement result so that the ground height difference is controlled within ±5 mm.

3. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: The special tooling in step S1 includes a positioning device and a clamping device, wherein the positioning device fixes the position of the vibration damping pad, and the clamping device firmly fixes the vibration damping pad on the platform.

4. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: In step S2, the pressing device is a hydraulic pressing device, and the applied pressure ranges from 0.5 to 1.5 MPa.

5. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: In step S3, the height of the prefabricated board is fine-tuned by using a tool, and the height adjustment is performed so that the height error of the prefabricated board is controlled within ±3 mm.

6. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: In step S3, the levelness of the prefabricated board is detected by combining a level ruler and a laser measuring instrument. The goal of adjusting the levelness is to control the level error of the prefabricated board within ±2 mm.

7. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: In step S4, permanent fixing includes fixing the precast panels on the ballast bed base with high-strength expansion bolts or embedded parts, and filling and sealing the fixing points with concrete.

8. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: In step S3, the inclination of the prefabricated panel is detected and adjusted by the diagonal height difference, and the adjustment of the inclination controls the diagonal height difference within ±1 mm.

9. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: During the fine adjustment process of step S3, a feeler gauge with an accuracy of 0.01 mm is used to check the surface flatness of the prefabricated board to ensure that the surface flatness error of the prefabricated board does not exceed ±1 mm.

10. The method for constructing a subway vibration damping pad prefabricated slab roadbed according to claim 1, characterized in that: The steps of fine-tuning the height, levelness and inclination are respectively completed by independent adjustment mechanisms, which include hydraulic jacks, level adjustment pads and precision adjustment bolts.

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