A lattice pavement structure, repair method and construction method

Abstract

The present invention relates to the technical field of road traffic, and provides a lattice pavement structure, a repair method and a construction method; a lattice pavement structure includes a driving lane slab and a steel lattice; the top surface of the steel lattice is connected to the bottom surface of the driving lane slab; the bottom surface of the steel lattice is used to connect to the base layer; the steel lattice includes longitudinal supports and transverse supports; the longitudinal supports are arranged along the longitudinal direction of the road; the longitudinal supports are distributed at intervals along the transverse direction of the road; the transverse supports are arranged along the transverse direction of the road; the transverse supports are distributed at intervals along the longitudinal direction of the road. Using this lattice pavement structure can solve the problem that the existing pavement structure is prone to corresponding random deformation when the base layer undergoes random settlement, thereby having an adverse impact on vehicle traffic.

Description

Technical Field

[0001] The present invention relates to the technical field of road traffic, and particularly to a lattice pavement structure, a repair method and a construction method. Background Art

[0002] The pavement structure is an important part of road engineering. Common pavement structures generally include a surface layer, a base layer and a subbase layer. The surface layer is the structural layer that directly bears the repeated action of wheel loads and the influence of natural factors. Commonly used surface layer structures are asphalt concrete and cement concrete. The base layer is located below the surface layer and is in close contact with the surface layer. It is mainly used to bear the load from the surface layer and transfer the load to a lower layer. Commonly used base layer materials include crushed stones, sandy soils, clay, etc. The design and construction quality of the base layer and the surface layer directly affect the service life, driving safety and operation efficiency of the pavement structure.

[0003] In actual application scenarios, such as in the alpine permafrost environment, the base layer is prone to random settlement due to the frost heaving and thaw settlement of the underlying permafrost. After a small range of random settlement occurs in the base layer, it can cause cracking of the surface layer asphalt concrete and affect durability. After a large range of random settlement occurs in the base layer, it can cause random deformation of the surface layer asphalt concrete and slab breakage of the cement concrete surface layer, which has an adverse impact on the driving comfort and safety of vehicles and reduces the road traffic service level. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the existing pavement structure is prone to corresponding random deformation when the base layer has random settlement, thereby having an adverse impact on vehicle passage, and to provide a lattice pavement structure, a repair method and a construction method.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A lattice pavement structure includes a driving lane slab and a steel lattice. The top surface of the steel lattice is connected to the bottom surface of the driving lane slab. The bottom surface of the steel lattice is used to connect to the base layer. The steel lattice includes longitudinal supports and transverse supports. The longitudinal supports are arranged along the longitudinal direction of the road. The longitudinal supports are spaced apart along the transverse direction of the road. The transverse supports are arranged along the transverse direction of the road. The transverse supports are spaced apart along the longitudinal direction of the road.

[0007] The driving lane slab can be made by various construction methods, such as on-site casting or factory prefabrication. Correspondingly, the steel lattice can also be in the form of on-site assembly or factory prefabrication.

[0008] The specific dimensions, quantities and distributions of the longitudinal supports and transverse supports depend on the actual load conditions. The structures at the connections of the steel lattice to the driving lane slab and the base layer are determined according to the specific requirements of the engineering construction site and can adopt various methods such as wing plates, bases or bottom plates.

[0009] The pavement structure of this scheme is composed of steel lattice and driving lane slab, so it has good bearing capacity and rigidity. When irregular settlement occurs in the base layer and various potholes are generated on the top surface of the base layer, this scheme can rely on its own rigidity to resist small-scale deformation caused by the potholes on the top surface of the base layer, that is, filter small-scale deformation, so that the deformation of the overall pavement structure caused by irregular settlement of the base layer is smoother, thereby reducing the adverse effects of irregular settlement of the base layer on vehicle traffic; at the same time, the steel lattice structure also has good processability, which is easy to make into a modular structure. During construction, each component is transported to the construction site separately and assembled, thereby reducing the difficulty of transportation, and it is also convenient to prefabricate in the factory, and even all components of the pavement structure, such as driving lane slabs and asphalt pavement, are prefabricated together with the steel lattice, thereby reducing the assembly and pouring workload at the construction site, and is more suitable for environments where large-scale construction or maintenance is not convenient, such as plateau environments.

[0010] The steel lattice structure also has good permeability. Compared with the existing physical road structure that absorbs and stores heat, this solution is not easy to store heat, and it is more difficult to conduct heat between the roadway slab and the base layer. If holes are opened in the side walls of the steel lattice, air convection can occur inside and outside the steel lattice, and heat can be removed from the roadbed in a timely and active manner, thereby preventing the base layer from absorbing and accumulating too much heat transferred from the roadway slab and causing diseases such as freeze-thaw. It is more suitable for frozen soil areas where freeze-thaw diseases need to be avoided.

[0011] At the same time, the main steel lattice material of the pavement structure of this scheme is steel, which can be recycled and reused when necessary, such as when the pavement structure needs to be replaced. It is an environmentally friendly material and is more conducive to achieving low-carbon construction.

[0012] As a preferred embodiment of the present invention, the bottom surface of the steel lattice also includes a closed bottom plate; a grouting repair system is also arranged in the steel lattice; the grouting repair system includes a horizontal conveying pipe and a vertical grouting pipe; the horizontal conveying pipe is arranged in the horizontal direction; at least one end of the horizontal conveying pipe extends out of the outer side surface of the steel lattice; the vertical grouting pipes are spaced apart along the length direction of the horizontal conveying pipe; one end of the vertical grouting pipe is connected to the horizontal conveying pipe, and the other end of the vertical grouting pipe passes through the closed bottom plate to the top of the base layer.

[0013] This scheme adds a closed bottom plate at the bottom of the steel lattice structure, so that the longitudinal support, transverse support and closed bottom plate are combined into a steel box structure, specifically a steel box structure with an open top surface, so that the structure bears the load together with the roadway slab. The roadway slab is compressed, the transverse support and longitudinal support of the steel box are sheared, and the closed bottom plate is tensile. The material utilization rate is high and the bearing capacity is strong, so that this scheme can resist or adapt to a wider range of voids occurring under the closed bottom plate.

[0014] On the other hand, when random settlement occurs in the base course, a closed void cavity will be formed under the closed base plate, which can be repaired through a grouting repair system.

[0015] The grouting repair system is arranged inside the steel lattice, which can avoid increasing the thickness of the road surface structure; when setting the grouting repair system, it is necessary to pay attention to avoiding interference with the steel lattice, and interference can be avoided by means of opening holes in the steel lattice. At least one end of the horizontal conveying pipe extends out of the steel lattice to facilitate grouting into the vertical grouting pipe from outside the steel lattice; when through holes are provided on the longitudinal support, the horizontal conveying pipe can directly extend out of the ventilation holes.

[0016] The horizontal conveying pipe and the vertical grouting pipe can be evenly distributed on the closed base plate, or can be selectively distributed in key areas where settlement is likely to occur according to the actual geological conditions; the specific size, shape and distribution of the horizontal conveying pipe are determined according to the layout of the vertical grouting pipe, for example, it can be composed of multiple independent pipes arranged horizontally along the road and spaced longitudinally along the road.

[0017] When random settlement occurs in the base course, a closed void cavity will be formed under the closed base plate. Therefore, a grouting repair system is introduced in this solution. The grouting repair system includes a horizontal conveying pipe distributed longitudinally along the road and a vertical grouting pipe distributed along the length direction of the horizontal conveying pipe. Coupled with the fact that the slurry has a certain flow range, it is possible to realize grouting at any position of the base course under the closed base plate; when it is detected that a void cavity appears under the closed base plate, grout is injected into the vertical grouting pipe at the void cavity from the horizontal conveying pipe at the corresponding position, so that the slurry can enter the void cavity through the corresponding vertical grouting pipe to achieve the repair of the base course.

[0018] As a preferred solution of the present invention, the grouting repair system further includes a grouting control short pipe; the grouting control short pipe has a grouting inner cavity; at least one end of the grouting inner cavity in the axial direction of the grouting control short pipe is provided with a grouting inlet; a grouting outlet is provided on the side wall of the grouting inner cavity; the grouting control short pipe can move along the length direction of the horizontal conveying pipe to connect or stagger the grouting outlet with the vertical grouting pipe.

[0019] The sliding connection between the grouting control short pipe and the inner wall of the horizontal conveying pipe can adopt various forms, such as making the outer wall of the grouting control short pipe and the inner wall of the grouting pipe have a clearance fit, or introducing a traveling mechanism such as a pulley.

[0020] In the grouting repair system of this solution, on the basis of the horizontal conveying pipe and the vertical grouting pipe, a grouting control short pipe is further introduced; when it is detected that there is a void cavity under the closed bottom plate, the grouting control short pipe can be set in the horizontal conveying pipe at the void, and the grouting control short pipe is moved along the horizontal conveying pipe to the vertical grouting pipe at the void, so that only the vertical grouting pipe at the void can be grouted, and the grout will not enter other vertical grouting pipes or remain in the horizontal conveying pipe; therefore, if settlement occurs again at the other vertical grouting pipes on the same horizontal conveying pipe, the grouting control short pipe can still be set in the horizontal conveying pipe and moved to the corresponding vertical grouting pipe, and then grouting can be carried out again, unlike the solution of directly grouting into the horizontal conveying pipe, which will cause the horizontal conveying pipe or other vertical grouting pipes to be blocked and unable to be used for the second time due to the grout remaining in the horizontal conveying pipe or other vertical grouting pipes.

[0021] As a preferred solution of the present invention, sealing gaskets are arranged on both sides of the vertical grouting pipe along the length direction of the horizontal conveying pipe; the sealing gaskets are used to form a seal between the outer wall of the grouting control short pipe and the inner wall of the horizontal conveying pipe.

[0022] The sealing gasket can form a seal with the grouting control short pipe for the horizontal conveying pipe, that is, when the grouting control short pipe is moved to one of the vertical grouting pipes and the grouting outlet is aligned with the vertical grouting pipe, the sealing gaskets located on both sides of the vertical grouting pipe can respectively form a seal with the corresponding positions of the grouting control short pipe, so that when grouting into the grouting control short pipe, even if the grout overflows from the grouting outlet, this part of the grout cannot reach the horizontal conveying pipe segments outside the two sealing gaskets.

[0023] This solution can reduce the grout that overflows from the grouting outlet and flows to other parts of the horizontal conveying pipe when grouting into the grouting control short pipe, and at the same time avoid this part of the grout from hindering the sliding of the grouting control short pipe relative to the horizontal conveying pipe after solidification.

[0024] As a preferred solution of the present invention, at least one variable-diameter sealing plate is arranged on the grouting control short pipe; the diameter of the variable-diameter sealing plate is adjustable; a sealing plate clamping groove corresponding to the variable-diameter sealing plate is arranged on the horizontal conveying pipe at the vertical grouting pipe; the variable-diameter sealing plate can adjust its diameter to be embedded in or disengaged from the sealing plate clamping groove.

[0025] The variable-diameter sealing plate can adopt various products that can change the diameter, such as an elastic expansion sleeve or a drum-shaped tooth expansion sleeve.

[0026] This solution can lock the relative position of the grouting control short pipe and the horizontal conveying pipe through the combination of the variable-diameter sealing plate and the sealing plate slot; when the grouting control short pipe needs to be moved, the diameter of the variable-diameter sealing plate can be reduced, so that the grouting control short pipe can be freely moved; locking the relative position of the grouting control short pipe and the horizontal conveying pipe can prevent the grouting control short pipe from deviating relative to the horizontal conveying pipe under the impact of the slurry when grouting into the grouting control short pipe, resulting in the misalignment of the grouting outlet and the vertical grouting pipe, and the situation where grouting cannot be normally carried out into the vertical grouting pipe; on the other hand, locking the position of the grouting control short pipe according to the position of the sealing plate slot can accurately stop the grouting control short pipe on the vertical grouting pipe, so that the grouting outlet is aligned with the vertical grouting pipe, which is conducive to more smoothly grouting into the vertical grouting pipe.

[0027] As a preferred solution of the present invention, the variable-diameter sealing plate includes a control lock head; rotating the control lock head can adjust the diameter of the variable-diameter sealing plate; a guide rod is detachably connected to the control lock head; rotating the guide rod can drive the control lock head to rotate and then adjust the diameter of the variable-diameter sealing plate; pushing the guide rod can drive the control lock head to move and then drive the grouting control short pipe to move.

[0028] Depending on the type or quantity of the variable-diameter sealing plates, there may be a situation where multiple guide rods are required.

[0029] This solution selects a variable-diameter sealing plate with a control lock head, and a guide rod is detachably connected to the control lock head, so that the grouting control short pipe can be pushed to a specified position on the horizontal conveying pipe by using the guide rod, and the diameter of the variable-diameter sealing plate is adjusted to be larger by rotating the guide rod, so that the variable-diameter sealing plate is connected to the sealing plate slot, and then the position of the grouting control short pipe is locked.

[0030] As a preferred solution of the present invention, the horizontal conveying pipes are distributed at intervals along the longitudinal direction of the road; the distance between two adjacent horizontal conveying pipes along the longitudinal direction of the road is DL; 0.2m ≤ DL ≤ 0.5m.

[0031] This solution recommends a specific layout method of one of the horizontal conveying pipes, that is, distributed at intervals along the longitudinal direction of the road, and recommends the distance between two adjacent horizontal conveying pipes along the longitudinal direction of the road; this distance can ensure that there will be no situation where the base settlement between the two horizontal conveying pipes cannot be repaired due to the too large distance between the horizontal conveying pipes; it can also ensure that there will be no problem that the number of horizontal conveying pipes is too large due to the too small distance between the horizontal conveying pipes, and the number of through holes that need to be provided on the corresponding closed bottom plate is also too large, resulting in great construction difficulty and high construction cost of the grouting repair system.

[0032] As a preferred solution of the present invention, a sealing cover is detachably connected to the opening of the horizontal conveying pipe.

[0033] The detachable connection between the sealing cover and the horizontal conveying pipe can be achieved in various ways, such as threaded connection or interference fit; the sealing cover can be made of various materials, such as rubber or metal.

[0034] This solution can prevent foreign objects from entering the horizontal conveying pipe when the horizontal conveying pipe is not in use, thus keeping the inside of the horizontal conveying pipe clean and unobstructed.

[0035] As a preferred solution of the present invention, the closed bottom plate comprises a plurality of bottom steel plates longitudinally distributed along the road.

[0036] The connection method of adjacent bottom steel plates refers to the prior art and can adopt methods such as welding and bolting.

[0037] In this solution, that is, the closed bottom plate is formed by splicing a plurality of bottom steel plates longitudinally distributed along the road, which can reduce the manufacturing and transportation difficulties of the closed bottom plate.

[0038] As a preferred solution of the present invention, the first engaging teeth and the second engaging teeth are respectively arranged on both sides of the bottom steel plate along the longitudinal direction of the road; the first engaging teeth can be engaged with the second engaging teeth.

[0039] The first engaging teeth and the second engaging teeth can be of various shapes, such as rectangular teeth or trapezoidal teeth, as long as they can facilitate the splicing of adjacent two bottom steel plates; the lengths of the first engaging teeth and the second engaging teeth along the corresponding side edges of the bottom steel plate are determined according to actual needs, and can be set to be of full length or not of full length; the first engaging teeth can be engaged with the second engaging teeth, that is, when a plurality of bottom steel plates are arranged side by side and face the same direction, the second engaging teeth or the first engaging teeth of the previous bottom steel plate can be engaged with the first engaging teeth or the second engaging teeth of the next bottom steel plate.

[0040] The first engaging teeth and the second engaging teeth of this solution can help quickly splice adjacent two bottom steel plates; and according to the type of the selected engaging teeth, this solution can also limit the relative displacement of adjacent two bottom steel plates; if rectangular teeth are selected, this solution can limit the relative displacement of adjacent two bottom steel plates along the transverse direction of the road; if trapezoidal teeth are selected and the long sides of the trapezoidal teeth face the outside of the bottom steel plate, this solution can limit all relative displacements of adjacent two bottom steel plates along the horizontal direction.

[0041] As a preferred solution of the present invention, a bottom plate connecting plate is arranged at the joint of adjacent two bottom steel plates; the bottom plate connecting plate is bolted to the bottom steel plates on both sides thereof respectively.

[0042] The specific dimensions and arrangements of the bottom plate connecting plate are determined according to the actual load and the specific conditions of the engineering construction site.

[0043] This solution can further enhance the connection strength of adjacent bottom steel plates.

[0044] As a preferred embodiment of the present invention, bottom stiffeners are provided on the top surface of the closed bottom plate.

[0045] The specific dimensions, quantity, and arrangement of the bottom stiffeners are determined according to the actual load conditions.

[0046] This solution can increase the load-bearing capacity and stiffness of the closed bottom plate, thereby improving the load-bearing capacity and stiffness of the steel box structure composed of the closed bottom plate, longitudinal supports, and transverse supports, and further improving the load-bearing capacity and stiffness of the overall structure composed of the steel box structure and the driving lane slab, making this solution have a stronger ability to resist random settlement.

[0047] As a preferred embodiment of the present invention, the driving lane slab is a concrete member; a steel top plate is provided between the driving lane slab and the steel lattice; the steel top plate and the driving lane slab are combined into a steel-concrete structure.

[0048] The way the steel top plate and the driving lane slab form a steel-concrete structure refers to the prior art and can be connected by shear connectors such as stud bolts, thereby being combined into a steel-concrete structure.

[0049] In this solution, a steel top plate is provided between the steel lattice and the driving lane slab, and the steel top plate and the driving lane slab are combined into a steel-concrete structure, so that the steel top plate can bear the load from vehicles together with the driving lane slab, and the steel top plate is in tension and the driving lane slab is in compression, with strong load-bearing capacity and high material utilization rate.

[0050] As a preferred embodiment of the present invention, the steel top plate comprises multiple top steel plates; two adjacent top steel plates are welded together; the weld seams of the steel top plate are staggered from the longitudinal supports and transverse supports.

[0051] The specific design of the weld seams of the steel top plate meets the corresponding requirements of the steel structure design and processing specifications.

[0052] This solution staggeres the splicing seams of the steel top plate from the longitudinal supports and transverse supports, that is, avoids the splicing seams of the steel top plate from coinciding with the longitudinal supports and transverse supports to meet the specification requirements.

[0053] As a preferred embodiment of the present invention, both ends of the steel lattice along the road width do not extend beyond the base course; the longitudinal supports located at the leftmost and rightmost ends along the road width are at least one meter away from the corresponding edges of the base course.

[0054] In this solution, the distance between the left side surface of the side plate located at the leftmost end and the right side surface of the side plate located at the rightmost end along the road width is narrower than the width of the base course along the road width, and the left side surface of the longitudinal support located at the leftmost end along the road width is at least one meter away from the left edge of the base course, and the right side surface of the longitudinal support located at the rightmost end along the road width is at least one meter away from the right edge of the base course.

[0055] This solution prevents the edge of the longitudinal support from coinciding with the edge of the base layer, avoiding the direct transfer of load by the longitudinal support to the weak zone at the edge of the base layer.

[0056] As a preferred solution of the present invention, the longitudinal support and / or the transverse support includes a flange plate; the flange plate on the longitudinal support is arranged at the top and / or bottom of the longitudinal support; the flange plate on the transverse support is arranged at the top and / or bottom of the transverse support.

[0057] The specific width and thickness of the flange plate are determined according to the actual load; if there is a need to set shear connectors on the flange plate, the arrangement of the shear connectors also needs to be considered; for steel lattice girders, the flange plate can be arranged only along the longitudinal support, or only along the transverse support, or can be arranged along both the longitudinal support and the transverse support; for the longitudinal support, the flange plate can be arranged at the top of the longitudinal support, or at the bottom of the longitudinal support, or can be arranged at both the top and bottom of the longitudinal support; for the transverse support, the flange plate can be arranged at the top of the transverse support, or at the bottom of the transverse support, or can be arranged at both the top and bottom of the transverse support.

[0058] When the flange plate is arranged at the top of the longitudinal support and / or the transverse support, this solution can increase the area at the top of the steel lattice girder, thereby increasing the connection area between the steel lattice girder and the carriageway slab, making the connection between the steel lattice girder and the carriageway slab more reliable; at the same time, this solution can also facilitate the setting of shear connectors such as stud bolts on the top surface of the steel lattice girder, further enhancing the connection strength between the steel lattice girder and the carriageway slab, making the connection between the steel lattice girder and the carriageway slab more reliable.

[0059] When the flange plate is arranged at the bottom of the longitudinal support and / or the transverse support, this solution can increase the area at the bottom of the steel lattice girder, thereby increasing the connection area between the steel lattice girder and its underlying structure, such as the base layer, making the connection between the steel lattice girder and its underlying structure more reliable.

[0060] As a preferred solution of the present invention, ventilation holes for ventilation are provided on the longitudinal support.

[0061] The ventilation holes can be of various shapes, such as array honeycomb or oblong; the specific number and arrangement of the ventilation holes are determined according to the ventilation requirements, and at the same time, the structural strength and stiffness requirements of the longitudinal support should also be met.

[0062] This solution provides ventilation holes for ventilation on the longitudinal support, which is conducive to the gas exchange on both sides of the longitudinal support to form cold and hot air convection, thereby promoting the heat dissipation of the base layer, and can avoid the accumulation of heat in the base layer, and is applicable to frozen soil areas where freeze-thaw diseases need to be avoided.

[0063] As a preferred solution of the present invention, a leveling layer is further provided between the steel lattice girder and the base layer.

[0064] The specific materials and thickness of the leveling layer can refer to the prior art, and materials such as mortar and concrete can be used.

[0065] This solution is used to ensure the close contact between the steel lattice and the base layer, and at the same time can also prevent the random settlement of the base layer from directly affecting the steel lattice, thereby reducing the corresponding deformation of the steel lattice when the base layer undergoes random settlement, and further reducing the deformation of the driving lane slab; at the same time, the leveling layer can also reduce the corrosion caused by the capillary water rising of the base layer to the steel lattice, thereby extending the service life of the steel lattice.

[0066] The leveling layer can also be used as a reinforcement layer for the base layer to improve the bearing capacity and stability of the base layer, thereby further improving the overall stability and durability of the road surface structure.

[0067] As a preferred solution of the present invention, the driving lane slab includes a concrete layer; shear connectors are provided on the top of the steel lattice; the steel lattice is connected to the concrete layer through the shear connectors.

[0068] The shear connectors refer to the prior art and can be in the form of stud bolts or other shear connectors.

[0069] This solution can ensure the connection strength and stiffness between the steel lattice and the driving lane slab, thereby reducing the possibility of the connection between the driving lane slab and the steel lattice failing under external loads and even causing the separation or relative slip of the driving lane slab and the steel lattice.

[0070] As a preferred solution of the present invention, the driving lane slab further includes an asphalt pavement.

[0071] The specific thickness and material selection of the asphalt pavement are determined according to actual needs.

[0072] The asphalt pavement can be laid on site or precast together with the driving lane slab, thereby reducing the workload of on-site construction and being beneficial to obtaining higher construction quality for the asphalt pavement.

[0073] The driving lane slab of this solution includes an asphalt pavement, which can improve the flatness of the driving lane slab, is beneficial to obtaining higher driving comfort, and can also absorb impacts and reduce traffic noise.

[0074] A method for repairing a road surface structure, applied to a lattice-type road surface structure of the present invention, includes the following steps:

[0075] A. Inject grout into the corresponding vertical grouting pipe at the void position through a horizontal delivery pipe until the predetermined grouting requirements are met.

[0076] The method for detecting the void under the closed bottom plate refers to the prior art, and methods such as vibration testing method, probe method, and seismic exploration method can be used.

[0077] In step A, grout can be injected only into the vertical grouting pipes corresponding to the void positions. For example, a soft grouting pipe can be inserted into the horizontal conveying pipe, and the soft grouting pipe can be bent at the vertical grouting pipe at the corresponding position so that the soft grouting pipe enters the vertical grouting pipe at the corresponding position, thereby enabling the void area to be grouted through the vertical grouting pipe at the corresponding position; or the horizontal conveying pipe at the corresponding position can be directly grouted. However, if this repair method is adopted, the grout will remain in the horizontal conveying pipe and other vertical grouting pipes and block the horizontal conveying pipe and other vertical grouting pipes after solidification, making the corresponding horizontal conveying pipe and vertical grouting pipe unable to be reused.

[0078] In step A, the specific value of the predetermined grouting volume is determined according to the actual settlement situation; it is advisable to take a value that can fill the void cavity with grout and not overflow from the vertical grouting pipe; if the synchronous deflection of the road surface structure is large, before grouting, the upper road surface structure can be mechanically lifted or replaced to the design elevation and then repaired.

[0079] This solution is for the case where the lattice road surface structure includes a grouting repair system; when random settlement occurs in the base layer and a void cavity is generated under the closed bottom plate, grout is injected into the vertical grouting pipes at the void cavity. When the grout enters the void cavity and solidifies, the void cavity can be eliminated and the repair of the base layer can be achieved.

[0080] As a preferred solution of the present invention, when the lattice road surface structure further includes a grouting control short pipe, step A includes the following steps:

[0081] A1. Move the grouting control short pipe along the horizontal conveying pipe to the vertical grouting pipe at the corresponding void position, and align the grouting outlet with the vertical grouting pipe;

[0082] A2. Fix the position of the grouting control short pipe; inject grout into the grouting inlet until the predetermined grouting requirement is met;

[0083] A3. Release the fixation of the grouting control short pipe; move the grouting control short pipe out of the horizontal conveying pipe.

[0084] In step A1, various methods can be used to push the grouting device, such as pushing the grouting device through a rod-shaped part, or pulling the grouting device with a rod-shaped or rope-shaped part. If a guide rod is detachably connected to the control lock of the grouting device, the guide rod can be used to push the grouting device along the horizontal conveying pipe;

[0085] To determine whether the grouting outlet is aligned with the vertical grouting pipe, it can be achieved in various ways. For example, sensors can be installed on the grouting device to confirm the current position of the grouting device; or the position of the grouting device can be calculated by measuring the length of the part that pushes or pulls the grouting device extending into the horizontal conveying pipe. If a guide rod is used to push the grouting device, the length of the part of the guide rod extending into the horizontal conveying pipe can be calculated by measuring the length of the part of the guide rod outside the horizontal conveying pipe, and thus the position of the grouting device relative to the horizontal conveying pipe can be indirectly obtained.

[0086] In step A2, the method of fixing the grouting device depends on the specific structure of the grouting device. If no special limiting structure is provided on the grouting device itself, the position of the grouting device can be restricted by inserting limiting parts into the horizontal conveying pipe. For example, struts can be inserted from both ends of the horizontal conveying pipe to fix the grouting device. If a special limiting structure is provided on the grouting device, the grouting device can be fixed in a corresponding manner.

[0087] In step A3, the method of releasing the fixation of the grouting device depends on the specific structure of the grouting device. If the method of inserting struts from both ends of the horizontal conveying pipe to fix the grouting device is adopted, the struts need to be removed in this step. If a special limiting structure is provided on the grouting device, the fixation can be released in a corresponding manner. To move the grouting device out of the horizontal conveying pipe, various methods can be used, such as pushing the grouting device with a rod-shaped part or pulling the grouting device with a rod-shaped or rope-shaped part. If a guide rod is detachably connected to the control lock head of the grouting device, the guide rod can be used to push the grouting device along the horizontal conveying pipe.

[0088] In step A3, when grouting into the vertical grouting pipe, in this solution, it is advisable to grout into the vertical grouting pipe through the grouting inlet. The grout can be injected into the vertical grouting pipe by connecting a grouting pipe to the vertical grouting pipe in advance, or after the grouting control short pipe is moved into place and fixed, the grouting pipe can be inserted into the grouting inlet for grouting.

[0089] This solution also includes the case of the grouting control short pipe corresponding to the steel lattice pavement structure, which is used to accurately control the grouting position through the grouting control short pipe, so that the grout can only enter the vertical grouting pipe aligned with the grouting outlet through the grouting inlet, and will not enter the vertical grouting pipes in other positions, nor will it enter the horizontal conveying pipes on both sides of the grouting control short pipe, thus preventing the blockage of the vertical grouting pipes that do not need to be grouted and the blockage of the horizontal conveying pipes. If settlement occurs again at the other vertical grouting pipes on the same horizontal conveying pipe, the grouting control short pipe can still be set in the horizontal conveying pipe and moved to the corresponding vertical grouting pipe, and then re-grouting can be carried out, so that the grouting repair system can be reused.

[0090] As a preferred embodiment of the present invention, when the grouting control short pipe further includes a reduced-diameter sealing plate, and a corresponding sealing plate slot is provided in the horizontal conveying pipe,

[0091] Step A2 further includes the following steps:

[0092] i. Enlarge the diameter of the reduced-diameter sealing plate to connect with the sealing plate slot; when a guide rod is detachably connected to the control lock head, rotate the guide rod to enlarge the diameter of the reduced-diameter sealing plate;

[0093] Step A3 further includes the following steps:

[0094] ii. Reduce the diameter of the reduced-diameter sealing plate to separate it from the sealing plate slot; when the guide rod is detachably connected to the control lock head, rotate the guide rod to reduce the diameter of the reduced-diameter sealing plate.

[0095] In step i, the method of adjusting the diameter of the reduced-diameter sealing plate depends on the specific structure of the reduced-diameter sealing plate; if an expansion sleeve is selected for the reduced-diameter sealing plate, the diameter of the reduced-diameter sealing plate can be adjusted by rotating the expansion sleeve bolt; if the reduced-diameter sealing plate includes a control lock head and a guide rod, the diameter of the reduced-diameter sealing plate can be adjusted by rotating the guide rod.

[0096] In step ii, the method of adjusting the diameter of the reduced-diameter sealing plate is the same as that in step i, but in this step, the diameter of the reduced-diameter sealing plate needs to be adjusted in the direction of decrease so that the reduced-diameter sealing plate can be separated from the sealing plate slot, thereby releasing the relative fixation between the grouting control short pipe and the horizontal conveying pipe.

[0097] This solution is for a grouting repair system that includes a grouting control short pipe with a reduced-diameter sealing plate, and a corresponding closed slot is provided in the horizontal conveying pipe, which is used to fix the grouting control short pipe relative to the horizontal conveying pipe or release the fixation of the grouting control short pipe relative to the horizontal conveying pipe. Compared with the method of using other temporary structures for fixation, such as inserting struts from both ends of the horizontal conveying pipe to fix the grouting device, this solution is simpler and more reliable.

[0098] A pavement structure construction method, applied to a lattice pavement structure of the present invention, includes the following steps:

[0099] S1. Prefabricate a steel lattice; the width of the steel lattice matches the width of the road; the length of the steel lattice is less than the length of the road; prefabricate corresponding driving lane slabs; connect the steel lattice and the driving lane slabs;

[0100] S2. Arrange the steel lattice and the driving lane slabs continuously along the longitudinal direction of the road; connect two adjacent steel lattices; pour wet joints between two adjacent driving lane slabs.

[0101] In step S1, the specific length of the prefabricated steel lattice is determined according to the specific conditions of the factory construction site, such as transportation conditions or hoisting conditions; the size of the prefabricated carriageway slab corresponds to the size of the steel lattice, that is, after adjacent steel lattices are connected to each other, there is a splicing joint enough for pouring wet joints between the corresponding adjacent two carriageway slabs; if the carriageway slab includes asphalt paving, it can be selected whether to prefabricate it together in this step according to the actual situation of the project construction site.

[0102] The specific connection method between the steel lattice and the carriageway slab refers to the prior art, and a connection method such as setting shear studs on the top surface of the steel lattice can be adopted.

[0103] In step S2, the connection method between two adjacent steel lattices is determined according to the specific structure of the steel lattice, and connection methods such as welding or bolting can be adopted. When there are more than two steel lattices along the longitudinal direction of the road, all the steel lattices can be connected to each other first, and then the wet joints are poured uniformly; or the wet joints can be poured together after connecting every two adjacent steel lattices.

[0104] In the construction method of this solution, both the steel lattice and the carriageway slab are prefabricated components and are connected before being transported to the construction site. Then, after being transported to the construction site and positioned, only adjacent steel lattices need to be connected, and wet joints are poured between the adjacent two carriageway slabs, which can reduce the workload at the construction site, improve the construction efficiency, and is more suitable for construction sites with harsh construction conditions, such as plateaus or mountainous areas.

[0105] As a preferred solution of the present invention, in step S1, the following steps are further included:

[0106] S1-1. Set a rubber water stop strip on the top surface of the steel lattice; apply epoxy mortar between the steel lattice and the carriageway slab.

[0107] The specific layout and cross-sectional size of the rubber water stop strip on the steel lattice are determined according to the specific structure and actual requirements of the steel lattice; if there are flange plates on the steel lattice, the rubber water stop strip can be set along the edges on both sides of the flange plate; the specific thickness of the epoxy mortar is determined according to actual requirements.

[0108] This solution sets a rubber water stop strip on the steel lattice and applies epoxy mortar between the steel lattice and the carriageway slab; when the carriageway slab is connected to the steel lattice, under the self-weight of the carriageway slab, the rubber water stop strip can be tightly pressed between the carriageway slab and the steel lattice, and the upper and lower surfaces of the epoxy mortar are in full contact with the carriageway slab and the steel lattice respectively, thereby realizing the sealing between the steel lattice and the carriageway slab.

[0109] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0110] 1. The pavement structure of this scheme is composed of steel lattice and driving lane slab, so it has good bearing capacity and rigidity. When irregular settlement occurs in the base layer and various potholes are generated on the top surface of the base layer, this scheme can resist the small-scale deformation caused by the potholes on the top surface of the base layer by its own rigidity, that is, filter the small-scale deformation, so that the deformation of the pavement structure as a whole due to the irregular settlement of the base layer is smoother, thereby reducing the adverse effects of irregular settlement of the base layer on vehicle traffic; at the same time, the steel lattice structure also has good processability, which is easy to make into a modular structure. During construction, each component is transported to the construction site separately and assembled, thereby reducing the difficulty of transportation, and it is also convenient to prefabricate in the factory, and even all components of the pavement structure, such as driving lane slab and asphalt pavement, are prefabricated together with the steel lattice, thereby reducing the assembly and pouring workload at the construction site, and is more suitable for environments where large-scale construction or maintenance is inconvenient, such as plateau environments.

[0111] 2. The steel lattice structure of this scheme also has good permeability. Compared with the existing physical road structure that absorbs and stores heat, this scheme is not easy to store heat, and it is more difficult to conduct heat between the roadway slab and the base layer. If holes are opened in the side walls of the steel lattice, air convection can occur inside and outside the steel lattice, and heat can be removed from the roadbed in a timely and active manner, thereby preventing the base layer from absorbing and accumulating too much heat transferred from the roadway slab and causing diseases such as freeze-thaw. It is more suitable for frozen soil areas where freeze-thaw diseases need to be avoided.

[0112] 3. The main steel lattice material of the pavement structure of this scheme is steel, which can be recycled and reused when necessary, such as when the pavement structure needs to be replaced. It is an environmentally friendly material and is more conducive to achieving low-carbon construction.

[0113] 4. The repair method of this scheme is aimed at the situation where the lattice pavement structure includes a grouting repair system; when the base layer undergoes random settlement and a hollow cavity is generated under the closed bottom plate, grouting is injected into the vertical grouting pipe at the hollow cavity. When the slurry enters the hollow cavity and solidifies, the hollow cavity can be eliminated and the base layer can be repaired.

[0114] 5. When the steel lattice pavement structure of the present scheme also includes a grouting control short pipe, the grouting position can be accurately controlled by the grouting control short pipe, so that the slurry can only enter the vertical grouting pipe aimed at the grouting outlet through the grouting inlet, and will not enter the vertical grouting pipes at other positions, nor will it enter the horizontal conveying pipes located on both sides of the grouting control short pipe, thereby preventing the vertical grouting pipes that do not need grouting from being blocked, and preventing the horizontal conveying pipes from being blocked. If settlement occurs again at the remaining vertical grouting pipes on the same horizontal conveying pipe, the grouting control short pipe can still be set in the horizontal conveying pipe and moved to the corresponding vertical grouting pipe, and then grouting can be carried out again, so that the grouting repair system can be reused.

[0115] 6. In the construction method of this solution, both the steel lattice and the driving lane slab are prefabricated components and are connected before being transported to the construction site. Therefore, after being transported to the construction site and positioned, only the adjacent steel lattices need to be connected, and a wet joint is poured between two adjacent driving lane slabs, which can reduce the workload at the construction site, improve the construction efficiency, and is more suitable for construction sites with harsh conditions, such as plateaus or mountainous areas. Description of the Drawings

[0116] Figure 1 is a partial perspective sectional view of a lattice pavement structure of the present invention;

[0117] Figure 2 is a partial perspective sectional view of a lattice pavement structure of the present invention;

[0118] Figure 3 is a partial perspective view of the steel lattice;

[0119] Figure 4 is a partial perspective view of the steel lattice with a grouting repair system installed and the lateral support hidden;

[0120] Figure 5 is a partial perspective view of a lattice pavement structure of the present invention at the closed bottom plate joint;

[0121] Figure 6 is a top view of the closed bottom plate;

[0122] Figure 7 is a perspective view of the combined structure of the horizontal conveying pipe and the vertical grouting pipe;

[0123] Figure 8 is a partial sectional perspective view of the connection between the horizontal conveying pipe and the vertical grouting pipe;

[0124] Figure 9 is a partial sectional perspective view of the grouting control short pipe;

[0125] Figure 10 is a sectional perspective view of the grouting control short pipe installed on the horizontal conveying pipe and connected to the guide rod;

[0126] Figure 11 is a sectional perspective view of the grouting control short pipe installed on the horizontal conveying pipe and connected to the guide rod;

[0127] Figure 12 is a partial perspective sectional view of a lattice pavement structure in Embodiment 5;

[0128] Figure 13It is a side view schematic diagram of a lattice pavement structure in Embodiment 5;

[0129] Figure 14 It is a partial sectional perspective view of a lattice pavement structure in Embodiment 5;

[0130] Figure 15 It is a schematic diagram of the deformation effect caused by the random settlement of the base layer in a conventional asphalt road structure;

[0131] Figure 16 It is a schematic diagram of the deformation effect caused by the random settlement of the base layer in a lattice pavement structure of the present invention;

[0132] Icons: 1 - base layer; 2 - carriageway slab; 3 - steel lattice; 4 - grouting repair system; 5 - leveling layer; 6 - conventional asphalt road structure; 7 - grouting pipe; 21 - concrete layer; 22 - asphalt paving; 31 - longitudinal support; 32 - transverse support; 33 - flange plate; 34 - steel top plate; 36 - closed bottom plate; 321 - ventilation hole; 361 - grouting through hole; 362 - bottom stiffener; 363 - first tooth; 364 - second tooth; 365 - bottom plate connecting plate; 41 - horizontal conveying pipe; 42 - vertical grouting pipe; 43 - grouting control short pipe; 44 - reducing sealing plate; 45 - guide rod; 411 - sealing plate slot; 431 - grouting cavity; 432 - grouting outlet; 433 - grouting inlet; 441 - control lock head. Detailed implementation manners

[0133] The present invention will be described in detail below with reference to the accompanying drawings.

[0134] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0135] Embodiment 1

[0136] As Figures 1 to 5 shown, a lattice pavement structure adopted in this embodiment includes a steel lattice 3; the top surface of the steel lattice 3 is connected to the bottom surface of the carriageway slab 2; the bottom surface of the steel lattice 3 is used to connect to the base layer 1; the steel lattice 3 includes a longitudinal support 31 and a transverse support 32; the plate surfaces of the longitudinal support 31 and the transverse support 32 are both in the vertical direction; the longitudinal support 31 is arranged along the longitudinal direction of the road; the longitudinal support 31 is distributed at intervals along the transverse direction of the road; the transverse support 32 is arranged along the transverse direction of the road; the transverse support 32 is distributed at intervals along the longitudinal direction of the road.

[0137] Specifically, the driving lane slab 2 includes a concrete layer 21 and an asphalt pavement 22 , wherein the bottom surface of the concrete layer 21 is connected to the top surface of the steel lattice 3 through shear connectors such as bolts; and the asphalt pavement 22 is arranged on the top surface of the concrete layer 21 .

[0138] The top and / or bottom of the steel lattice 3 are provided with flange plates 33. The flange plates 33 provided at the top of the steel lattice 3 are used to increase the contact area between the top surface of the steel lattice 3 and the bottom surface of the concrete layer 21, and can also facilitate the setting of shear connectors. The flange plates 33 provided at the bottom of the steel lattice 3 are used to increase the contact area between the bottom surface of the steel lattice 3 and the base layer 1. The flange plates 33 can also increase the overall bending bearing capacity and stiffness of the pavement structure of this embodiment.

[0139] The steel grid 3 can be set to the same width as the base layer 1, but for this embodiment, the longitudinal supports 31 located at the leftmost and rightmost ends along the transverse direction of the road are at least one meter away from the corresponding edge of the base layer 1 to prevent the longitudinal supports 31 from directly transferring the load to the weak area at the edge of the base layer 1.

[0140] The carriageway slab 2 can be cast on the top of the steel lattice 3 according to the actual situation of the construction site, but it is better to be prefabricated together with the steel lattice 3, so that the construction can be completed by assembling on site and processing the joints, which can avoid disassembling the formwork for cast-in-place and reduce the work of on-site pouring and maintenance, thereby reducing the construction period. It is more suitable for construction sites with harsh working environments and inconvenient pouring and maintenance, such as plateau areas.

[0141] When integrally prefabricated carriageway slabs 2 and steel lattices 3 are used, the specific length of each section of the prefabricated carriageway slabs 2 and steel lattices 3 is determined according to the actual conditions of the construction site and the transportation conditions; the connection method between adjacent prefabricated carriageway slabs 2 and steel lattices 3 can refer to the existing technology and be connected by methods such as wet joints and threaded connections. Specifically, for this embodiment, a plurality of U-shaped longitudinal ribs are extended from both ends of the road slab 2 along the longitudinal direction of the road, and the U-shaped longitudinal ribs are distributed in the transverse direction of the road; when two adjacent road slabs 2 are installed at the specified position, the U-shaped longitudinal ribs of the two road slabs 2 are aligned in the transverse direction of the road and staggered in the vertical direction of the road, and the two adjacent road slabs 2 can be relatively fixed by inserting positioning pins in the vertical direction into the U-shaped longitudinal ribs; the transverse support 32 of the steel lattice 3 is also provided with shear nails at the joints of the two adjacent road slabs 2. After the reinforcement at the joints of the two adjacent road slabs 2 is completed on site, concrete and asphalt are cast in place at the joints of the two adjacent road slabs 2, thereby connecting the two adjacent road slabs 2 as a whole.

[0142] A leveling layer 5 may be provided between the steel lattice 3 and the base layer 1 to allow the bottom surface of the steel lattice 3 to be in full contact with the base layer 1, thereby preventing the bottom surface of the steel lattice 3 from being unable to fit closely with the base layer 1 due to the unevenness of the base layer 1; in this embodiment, the leveling layer 5 is made of concrete.

[0143] As shown Figure 5 in the figure, ventilation holes 321 for ventilation are also provided on the longitudinal support 31; the ventilation holes 321 in this embodiment are oblong holes, but can also be other shapes according to actual needs, such as circular, trapezoidal, and array honeycomb shapes. The ventilation holes 321 are arranged at intervals along the longitudinal direction of the road.

[0144] For the pavement structure of this embodiment, as shown Figure 16 in the figure, when random settlement occurs in the base layer 1, the steel lattice 3 can resist deformation through its own stiffness, thereby transforming the random potholes at the top of the base layer 1 into relatively smooth deformations, avoiding the deformation corresponding to the random settlement of the base layer 1 as in the conventional asphalt road structure 6 in Figure 15 and reducing the adverse effects of the random settlement of the base layer 1 on the comfort and safety of vehicle driving.

[0145] Embodiment 2

[0146] As shown Figures 1 to 5 in the figure, on the basis of Embodiment 1, a closed bottom plate 36 is provided between the steel lattice 3 and the base layer 1; a grouting repair system 4 is also provided in the steel lattice 3; as shown Figure 7 in the figure, the grouting repair system includes a horizontal conveying pipe 41 and a vertical grouting pipe 42; the horizontal conveying pipe 41 is arranged horizontally; at least one end of the horizontal conveying pipe 41 extends out of the steel lattice 3; the vertical grouting pipes 42 are distributed at intervals along the length direction of the horizontal conveying pipe 41; one end of the vertical grouting pipe 42 is communicated with the horizontal conveying pipe 41, and the other end of the vertical grouting pipe 42 passes through the closed bottom plate 36 and is communicated to the top surface of the base layer 1;

[0147] Specifically, grouting through holes 361 are provided on the closed bottom plate 36; the vertical grouting pipes 42 pass through the grouting through holes 361 and are communicated with the top surface of the base layer 1; the gap between the grouting through holes 361 and the vertical grouting pipes 42 is sealed to prevent the slurry from overflowing from the gap between the grouting through holes 361 and the vertical grouting pipes 42.

[0148] As shown Figure 4 in the figure, the horizontal conveying pipe 41 is a straight pipe arranged transversely along the road; both ends of the horizontal conveying pipe 41 extend out of the corresponding longitudinal support 31 to facilitate grouting operation; detachable sealing caps are connected to both ends of the horizontal conveying pipe 41 extending out of the longitudinal support 31 to protect the inside of the horizontal conveying pipe 41 when it is not in use; the sealing caps are threadedly connected to the ends of the horizontal conveying pipe 41; each horizontal conveying pipe 41 is distributed at intervals along the longitudinal direction of the road; the distance between two adjacent horizontal conveying pipes 41 along the longitudinal direction of the road is DL; 0.2m ≤ DL ≤ 1.2m.

[0149] For the closed bottom plate 36, in this embodiment, it is a spliced structure, and the closed bottom plate 36 is longitudinally spliced by multiple bottom steel plates along the road; and as Figure 6 shown, first teeth 363 and second teeth 364 are respectively arranged on both sides of the bottom steel plate along the longitudinal direction of the road; the first teeth 363 can be joined with the second teeth 364, so as to facilitate the rapid assembly and fixation of adjacent bottom steel plates; specifically, the shape of the first teeth 363 is a dovetail shape, and the long side of the dovetail shape is located outside the bottom steel plate; the shape of the second teeth 364 corresponds to that of the first teeth 363, so that when the first teeth 363 and the second teeth 364 are joined, it can not only limit the freedom of movement of adjacent two bottom steel plates along the transverse direction of the road, but also limit the freedom of movement of adjacent two bottom steel plates along the longitudinal direction of the road, thereby avoiding accidental separation of adjacent two bottom steel plates under external force.

[0150] In addition to the first teeth 363 and the second teeth 364, as Figure 2 and Figure 5 shown, in this embodiment, a bottom plate connecting plate 365 is further arranged at the joint of two adjacent bottom steel plates; the bottom plate connecting plate 365 is bolted to the bottom steel plates on both sides of it respectively; according to different actual requirements and loads, the bottom plate connecting plate 365 can also be welded to the bottom steel plate, or the bottom plate connecting plate 365 is not provided.

[0151] Bottom stiffening ribs 362 can also be arranged on the top surface of the closed bottom plate 36; in this embodiment, a number of bottom stiffening ribs 362 along the longitudinal direction of the road are welded on the top surface of the closed bottom plate 36; the setting of the bottom stiffening ribs 362 depends on the actual load situation. If the overall combination of the steel lattice 3, the closed bottom plate 36 and the driving lane plate 2 already has sufficient strength, the bottom stiffening ribs 362 can also not be provided.

[0152] Embodiment 3

[0153] On the basis of Embodiment 2, the grouting repair system 4 further includes a grouting control short pipe 43; the grouting control short pipe 43 can be slidably connected to the inner wall of the horizontal conveying pipe 41; as Figure 9 shown, the grouting control short pipe 43 has a grouting inner cavity 431; a grouting inlet 433 is arranged at one end of the grouting inner cavity 431 along the length direction of the horizontal conveying pipe 41; a grouting outlet 432 is arranged on the side of the grouting inner cavity 431 close to the closed bottom plate 36; moving the grouting control short pipe 43 along the length direction of the horizontal conveying pipe 41 can make the grouting outlet 432 communicate with the vertical grouting pipe 42.

[0154] Specifically, as Figure 9 shown, the main body of the grouting control short pipe 43 is a tubular member that can be in clearance fit with the inner wall of the horizontal conveying pipe 41; variable diameter sealing plates 44 are arranged at both ends of the grouting control short pipe 43, and the diameter of the variable diameter sealing plates 44 is adjustable; as Figure 8As shown, the horizontal conveying pipe 41 is provided with a sealing plate slot 411 corresponding to the variable-diameter sealing plate 44 at the vertical grouting pipe 42; as Figure 10 and Figure 11 shown, when the grouting control short pipe 43 moves to the vertical grouting pipe 42 and the grouting outlet 432 communicates with the vertical grouting pipe 42, the variable-diameter sealing plate 44 can increase its diameter and be connected to the sealing plate slot 411.

[0155] For this embodiment, the variable-diameter sealing plate 44 includes a control lock head 441; rotating the control lock head 441 can adjust the diameter of the variable-diameter sealing plate 44; a guide rod 45 is detachably connected to the control lock head 441; rotating the guide rod 45 can drive the control lock head 441 to rotate and thus adjust the diameter of the variable-diameter sealing plate 44; pushing the guide rod 45 can drive the control lock head 441 to move and thus drive the grouting control short pipe 43 to move; specifically, since a clearance hole corresponding to the grouting inlet 433 is opened at the center of the variable-diameter sealing plate 44 near the grouting inlet 433, so as Figure 9 shown, an internal hexagonal groove is provided on the control lock head 441 far from the grouting inlet 433, and a corresponding external hexagonal structure is provided on the corresponding guide rod 45 for detachable connection therewith; an external hexagonal structure is provided on the control lock head 441 near the grouting inlet 433, and a corresponding internal hexagonal groove is provided on the corresponding guide rod 45 for detachable connection therewith; the guide rods 45 corresponding to the external hexagonal structure and the internal hexagonal groove respectively can be two independent guide rods 45, or the same guide rod 45 but with a replaceable connection structure.

[0156] A sealing gasket is further provided in the sealing plate slot 411, and when the variable-diameter sealing plate 44 is connected to the sealing plate slot 411, the sealing gasket can form a seal between the outer wall of the grouting control short pipe 43 and the inner wall of the horizontal conveying pipe 41; specifically, for this embodiment, since variable-diameter sealing plates 44 are provided at both ends of the grouting control short pipe 43, so after the variable-diameter sealing plate 44 and the corresponding sealing gasket form a seal, when grouting into the grouting control short pipe 43, even if the grout overflows from the vertical grouting pipe 42, it cannot enter the horizontal conveying pipe 41 outside the two sealing gaskets, thus preventing the horizontal conveying pipe 41 from being blocked.

[0157] Embodiment 4

[0158] A pavement structure repair method, applied to any one of the lattice pavement structures in Embodiments 2-3, comprises the following steps:

[0159] A0. Detect the position of the void under the closed bottom plate 36;

[0160] The method for detecting the void under the closed bottom plate 36 refers to the prior art and can adopt methods such as vibration testing method, probe method, seismic exploration method, etc.

[0161] A. Inject grout into the corresponding vertical grouting pipe 42 at the void position until the predetermined grouting volume is reached;

[0162] In this step, the soft grouting pipe 7 can be inserted into the horizontal conveying pipe 41, and the soft grouting pipe 7 can be bent at the vertical grouting pipe 42 at the corresponding position so that the soft grouting pipe 7 enters the vertical grouting pipe 42 at the corresponding position, and then the void area can be grouted through the vertical grouting pipe 42 at the corresponding position; alternatively, the horizontal conveying pipe 41 at the corresponding position can be directly grouted. However, if this repair method is adopted, the grout will remain in the horizontal conveying pipe 41 and block the horizontal conveying pipe 41 after solidification, making the horizontal conveying pipe 41 unable to be used continuously.

[0163] If the lattice pavement structure further includes a grouting control short pipe 43, step A may further include the following steps:

[0164] A1. Move the grouting control short pipe 43 along the horizontal conveying pipe 41 to the vertical grouting pipe 42 at the corresponding void position, and align the grouting outlet 432 with the vertical grouting pipe 42;

[0165] Various methods can be used to push the grouting control short pipe 43, such as pushing the grouting control short pipe 43 through a rod-shaped part, or pulling the grouting control short pipe 43 with a rod-shaped or rope-shaped part. If a guide rod 45 is detachably connected to the control lock 441 of the grouting control short pipe 43, the guide rod 45 can be used to push the grouting control short pipe 43 along the horizontal conveying pipe 41;

[0166] Determining whether the grouting outlet 432 is aligned with the vertical grouting pipe 42 can be achieved in various ways. For example, a sensor can be installed on the grouting control short pipe 43 to confirm the current position of the grouting control short pipe 43; alternatively, the position of the grouting control short pipe 43 can be calculated by measuring the length of the part of the part that pushes or pulls the grouting control short pipe 43 extending into the horizontal conveying pipe 41. For example, if the guide rod 45 is used to push the grouting control short pipe 43, the length of the part of the guide rod 45 located outside the horizontal conveying pipe 41 can be measured to calculate the length of the part of the guide rod 45 extending into the horizontal conveying pipe 41, and then the position of the grouting control short pipe 43 relative to the horizontal conveying pipe 41 can be indirectly obtained.

[0167] A2. Fix the position of the grouting control short pipe 43; inject grout into the grouting inlet 433 until the predetermined grouting volume is reached;

[0168] The method of fixing the grouting control short pipe 43 depends on the specific structure of the grouting control short pipe 43; if the grouting control short pipe 43 itself does not have any special limiting structure, the position of the grouting control short pipe 43 can be restricted by inserting a limiting part into the horizontal conveying pipe 41, such as inserting struts from both ends of the horizontal conveying pipe 41 to fix the grouting control short pipe 43;

[0169] If a special limiting structure is provided on the grouting control short pipe 43, the grouting control short pipe 43 can be fixed in a corresponding manner; for example, when a reduced-diameter sealing plate 44 is provided on the grouting control short pipe 43 and a corresponding sealing plate clamping groove 411 is provided in the horizontal conveying pipe 41, when it is confirmed that the grouting outlet 432 of the grouting control short pipe 43 is aligned with the corresponding vertical grouting pipe 42, so that the reduced-diameter sealing plate 44 and the sealing plate clamping groove 411 are aligned, the diameter of the reduced-diameter sealing plate 44 can be enlarged to make the reduced-diameter sealing plate 44 extend into the sealing plate clamping groove 411 to complete the limitation of the grouting control short pipe 43;

[0170] The diameter adjustment method of the reduced-diameter sealing plate 44 depends on the specific structure of the reduced-diameter sealing plate 44; for example, for the reduced-diameter sealing plate 44 in Embodiment 3, the external hexagonal structure or internal hexagonal groove of the guide rod 45 can be docked with the corresponding internal hexagonal groove or external hexagonal structure on the control lock head 441, so as to adjust the diameter of the reduced-diameter sealing plate 44 by rotating the guide rod 45 and make the reduced-diameter sealing plate 44 extend into the sealing plate clamping groove 411, and then fix the position of the grouting control short pipe 43;

[0171] When grouting into the vertical grouting pipe 42, for the case including the grouting control short pipe 43, it is advisable to grout into the vertical grouting pipe 42 through the grouting inlet 433; it can be grouted into the vertical grouting pipe 42 by connecting the grouting pipe 7 to the vertical grouting pipe 42 in advance as shown in Figure 11 As shown, or after the grouting control short pipe 43 is moved into place and fixed, the grouting pipe 7 can be extended into the grouting inlet 433 for grouting.

[0172] The specific value of the predetermined grouting volume depends on the actual settlement situation; but it is advisable to take a value that can make the slurry fill the void cavity and will not overflow from the vertical grouting pipe 42; if the synchronous deflection of the road surface structure is large, before grouting, the upper road surface structure can be lifted or replaced to the design elevation by machinery, and then the repair operation of this embodiment can be carried out; or by setting a sealing switch for the vertical grouting pipe 42, a certain pressure can be formed for the slurry from the vertical grouting pipe 42 to the upper part of the base layer 1, so as to be able to lift the road surface structure to a certain extent.

[0173] A3. Release the fixation of the grouting control short pipe 43; remove the grouting control short pipe 43 from the horizontal conveying pipe 41.

[0174] The method for releasing the fixation of the grouting control short pipe 43 depends on the specific structure of the grouting control short pipe 43; if the method of inserting struts from both ends of the horizontal conveying pipe 41 to fix the grouting control short pipe 43 is adopted, the struts need to be removed in this step; if a special limiting structure is provided on the grouting control short pipe 43, the fixation can be released through corresponding methods; for example, for the variable-diameter sealing plate 44 in Embodiment 3, the external hexagonal structure or internal hexagonal groove of the guide rod 45 can be docked with the corresponding internal hexagonal groove or external hexagonal structure on the control lock head 441, so as to adjust the diameter of the variable-diameter sealing plate 44 by rotating the guide rod 45 and make the variable-diameter sealing plate 44 withdraw from the sealing plate card slot 411, thereby releasing the fixation of the grouting control short pipe 43;

[0175] The grouting control short pipe 43 can be removed from the horizontal conveying pipe 41 in various ways, such as pushing the grouting control short pipe 43 through a rod-shaped part, or pulling the grouting control short pipe 43 through a rod-shaped or rope-shaped part. If the guide rod 45 is detachably connected to the control lock head 441 of the grouting control short pipe 43, the guide rod 45 can be used to push the grouting control short pipe 43 along the horizontal conveying pipe 41.

[0176] Embodiment 5

[0177] As Figures 12 to 14 shown, on the basis of Embodiment 1, a steel top plate 34 is provided between the steel lattice 3 and the carriageway slab 2. The steel top plate 34 is connected to the concrete layer 21 of the carriageway slab 2 through shear connectors, so as to form a steel-concrete structure with the carriageway slab 2; a flange plate 33 is provided at the bottom of the steel lattice 3.

[0178] Top stiffeners can also be provided on the bottom surface of the steel top plate 34; in this embodiment, a number of top stiffeners along the longitudinal direction of the road are welded on the bottom surface of the steel top plate 34; the setting of the top stiffeners depends on the actual load conditions. If the overall combination of the steel lattice 3, the steel top plate 34 and the carriageway slab 2 already has sufficient strength, the top stiffeners can also not be provided.

[0179] Specifically, the steel top plate 34 is formed by welding multiple top steel plates; and the splicing joints of the steel top plate 34 are staggered from the longitudinal support 31 and the transverse support 32; welding connections are adopted between the steel top plate 34 and the longitudinal support 31, and between the steel top plate 34 and the transverse support 32.

[0180] Since the closed bottom plate 36 is not provided in this embodiment, if a leveling layer 5 needs to be provided between the steel lattice 3 and the base layer 1, the leveling layer 5 can be provided only along the flange plate 33 at the bottom of the steel lattice 3, so as to form a grid-shaped foundation as Figure 12 shown.

[0181] Embodiment 6

[0182] A construction method for a road structure, which is applied to any one of the lattice pavement structures in Embodiments 1 to 3 and Embodiment 5, includes the following steps:

[0183] S1. Prefabricate the steel lattice 3; the width of the steel lattice 3 matches the width of the road; the length of the steel lattice 3 is less than the length of the road; prefabricate the corresponding driving lane slab 2; connect the steel lattice 3 and the driving lane slab 2;

[0184] Specifically, for this embodiment, shear studs are also arranged on the top surface of the steel lattice 3, so as to connect with the driving lane slab 2 through the shear studs; corresponding shear studs are also arranged on the upper surface of the steel lattice 3 corresponding to the wet joint of the driving lane slab 2; when a flange plate 33 is arranged on the top surface of the steel lattice 3, the shear studs are arranged on the top surface of the flange plate 33;

[0185] A number of U-shaped longitudinal bars extend from both longitudinal ends of the driving lane slab 2; when the driving lane slab 2 has an asphalt pavement 22, the asphalt pavement 22 is also prefabricated together;

[0186] When connecting the steel lattice 3 and the driving lane slab 2, the following steps are further included:

[0187] S1-1. Set a rubber water stop strip on the top surface of the steel lattice 3; apply epoxy mortar between the steel lattice 3 and the driving lane slab 2;

[0188] Specifically, the rubber water stop strip in this embodiment adopts an ethylene propylene diene monomer rubber water stop strip; when a flange plate 33 is arranged on the upper part of the steel lattice 3, the rubber water stop strip is pasted on the upper surface of the flange plate 33 along the two side edges of the flange plate 33; the thickness of the epoxy mortar is 10 - 15 mm;

[0189] S2. Arrange the steel lattice 3 and the driving lane slab 2 continuously along the road longitudinal direction; connect two adjacent steel lattices 3; pour a wet joint between two adjacent driving lane slabs 2;

[0190] The connection method between two adjacent steel lattices 3 depends on the specific structure of the steel lattice 3, and welding or bolting can be adopted; specifically, when the steel lattice 3 has a closed bottom plate 36, and the first tooth 363 and the second tooth 364 are arranged on the closed bottom plate 36, the steel lattices 3 can be quickly assembled by the first tooth 363 and the second tooth 364 of two adjacent steel lattices 3 first, and then two adjacent steel lattices 3 are welded or bolted to achieve reliable fixation; when welding or bolting the closed bottom plates 36 of two adjacent steel lattices 3, a bottom plate connecting plate 365 can also be arranged at the splicing seam of two adjacent steel lattices 3;

[0191] Two adjacent deck slabs 2 can be initially connected by overlapping each other through U-shaped longitudinal bars and inserting positioning pins into the U-shaped longitudinal bars. Subsequently, the reinforcement at the joint of two adjacent deck slabs 2 is completed on-site, and concrete and asphalt are cast in situ at the joint of two adjacent deck slabs 2, so as to connect two adjacent deck slabs 2 into a whole;

[0192] When casting the wet joint, a concrete cross beam can also be cast along the wet joint at the corresponding joint inside the steel lattice 3, so as to further increase the bearing capacity and stiffness of the pavement structure in this embodiment; the steel bars of the concrete cross beam can be installed on-site and connected to the deck slab 2 through stud bolts, so as to form a reinforced concrete cross beam.

[0193] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lattice pavement structure, comprising a carriageway slab (2), It is characterized in that It also comprises a steel lattice (3); the top surface of the steel lattice (3) is connected to the bottom surface of the roadway slab (2); the bottom surface of the steel lattice (3) is used to connect to the base layer (1); the steel lattice (3) comprises a longitudinal support (31) and a transverse support (32); the longitudinal support (31) is arranged along the longitudinal direction of the road; the longitudinal support (31) is distributed at intervals along the transverse direction of the road; the transverse support (32) is arranged along the transverse direction of the road; the transverse support (32) is distributed at intervals along the longitudinal direction of the road; the longitudinal support (31) is provided with ventilation holes (321) for ventilation; The bottom surface of the steel lattice (3) also includes a closed bottom plate (36); a grouting repair system (4) is also provided in the steel lattice (3); the grouting repair system (4) includes a horizontal conveying pipe (41) and a vertical grouting pipe (42); the horizontal conveying pipe (41) is provided in the horizontal direction; at least one end of the horizontal conveying pipe (41) extends out of the outer side surface of the steel lattice (3); the vertical grouting pipes (42) are distributed at intervals along the length direction of the horizontal conveying pipe (41); one end of the vertical grouting pipe (42) is connected to the horizontal conveying pipe (41), and the other end of the vertical grouting pipe (42) passes through the closed bottom plate (36) to the top of the base layer (1); The grouting repair system (4) further comprises a grouting control short tube (43); the grouting control short tube (43) has a grouting inner cavity (431); at least one end of the grouting inner cavity (431) along the axial direction of the grouting control short tube (43) is provided with a grouting inlet (433); the side wall of the grouting inner cavity (431) is provided with a grouting outlet (432); the grouting control short tube (43) can move along the length direction of the horizontal conveying pipe (41) so that the grouting outlet (432) is connected to or staggered with the vertical grouting pipe (42); At least one variable diameter sealing plate (44) is provided on the grouting control short pipe (43); the diameter of the variable diameter sealing plate (44) is adjustable; the horizontal conveying pipe (41) is provided with a sealing plate clamping groove (411) corresponding to the variable diameter sealing plate (44) at the vertical grouting pipe (42); the diameter of the variable diameter sealing plate (44) can be adjusted to fit into or be separated from the sealing plate clamping groove (411); The closed bottom plate (36) comprises a plurality of bottom steel plates distributed along the longitudinal direction of the road; the bottom steel plates are respectively provided with a first latching tooth (363) and a second latching tooth (364) on both sides along the longitudinal direction of the road; the first latching tooth (363) can be assembled with the second latching tooth (364).

2. A lattice pavement structure according to claim 1, It is characterized in that The horizontal conveying pipe (41) is provided with sealing gaskets on both sides of the vertical grouting pipe (42) along its length direction; the sealing gaskets are used to form a seal between the outer wall of the grouting control short pipe (43) and the inner wall of the horizontal conveying pipe (41).

3. A lattice pavement structure according to claim 1, It is characterized in that The variable-diameter sealing plate (44) includes a control lock head (441); rotating the control lock head (441) can adjust the diameter of the variable-diameter sealing plate (44); a guide rod (45) is detachably connected to the control lock head (441); rotating the guide rod (45) can drive the control lock head (441) to rotate and thus adjust the diameter of the variable-diameter sealing plate (44); pushing the guide rod (45) can drive the control lock head (441) to move and thus drive the grouting control short pipe (43) to move.

4. A lattice pavement structure according to claim 1, characterized in that, a floor connecting plate (365) is provided at the joint of two adjacent bottom steel plates; the floor connecting plate (365) is bolted to the bottom steel plates on both sides of it respectively.

5. A lattice pavement structure according to claim 1, characterized in that, the driving lane slab (2) is a concrete member; a steel top plate (34) is provided between the driving lane slab (2) and the steel lattice (3); the steel top plate (34) and the driving lane slab (2) are combined into a steel-concrete structure.

6. A lattice pavement structure according to any one of claims 1 to 5, characterized in that, both ends of the steel lattice (3) along the transverse direction of the road do not exceed the base layer (1); the longitudinal supports (31) located at the leftmost and rightmost ends respectively along the transverse direction of the road are at least one meter away from the corresponding edges of the base layer (1).

7. A lattice pavement structure according to any one of claims 1 to 5, characterized in that, the longitudinal support (31) and / or the transverse support (32) includes a flange plate (33); the flange plate (33) on the longitudinal support (31) is arranged at the top and / or bottom of the longitudinal support (31); the flange plate (33) on the transverse support (32) is arranged at the top and / or bottom of the transverse support (32).

8. A lattice pavement structure according to any one of claims 1 to 5, characterized in that, a leveling layer (5) is further provided between the steel lattice (3) and the base layer (1).

9. A method for repairing a pavement structure, characterized in that, applied to a lattice pavement structure according to any one of claims 1 to 3, and includes the following steps: A. Inject grout into the corresponding vertical grouting pipe (42) at the void position through the horizontal delivery pipe (41) until the predetermined grouting requirement is met.

10. A method for repairing a pavement structure according to claim 9, characterized in that, when the lattice pavement structure further includes a grouting control short pipe (43), step A includes the following steps: A1. Move the grouting control short pipe (43) along the horizontal delivery pipe (41) to the vertical grouting pipe (42) at the corresponding void position, and align the grouting outlet (432) with the vertical grouting pipe (42); A2. Fix the position of the grouting control short pipe (43); inject grout into the grouting inlet (433) until the predetermined grouting requirement is met. A3. Release the fixation of the grouting control short pipe (43); remove the grouting control short pipe (43) from the horizontal conveying pipe (41).

11. A construction method of a road surface structure characterized in that it is applied to a lattice-type road surface structure described in any one of claims 1 to 8, and includes the following steps: S1. Prefabricate the steel lattice (3); the width of the steel lattice (3) matches the width of the road; the length of the steel lattice (3) is less than the length of the road; prefabricate the corresponding driving lane slab (2); connect the steel lattice (3) and the driving lane slab (2); S2. Arrange the steel lattice (3) and the driving lane slab (2) continuously along the longitudinal direction of the road; connect two adjacent steel lattices (3); pour wet joints between two adjacent driving lane slabs (2).

12. A construction method of a road surface structure according to claim 11 characterized in that step S1 further includes the following steps: S1-1. Set a rubber water stop strip on the top surface of the steel lattice (3); apply epoxy mortar between the steel lattice (3) and the driving lane slab (2).

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