A prefabricated pavement structure and construction method

Abstract

A prefabricated pavement structure and construction method are provided to effectively improve the connection safety of prefabricated pavement panels, the adjustment ability and repairability of prefabricated pavement panels, facilitate the manufacture and transportation of prefabricated pavement panels, and make assembly, emergency repair and replacement construction more convenient. The prefabricated pavement panels are assembled on the roadbed to form the prefabricated pavement. The prefabricated pavement panels adopt a prestressed reinforced concrete structure. Each prefabricated pavement panel is provided with longitudinal lower grooves at intervals along the width direction at two longitudinal connection ends, and transverse lower grooves are provided at intervals along the width direction at two transverse connection ends. Two adjacent prefabricated pavement panels are provided with rod-shaped connecting components in the corresponding longitudinal lower grooves or transverse lower grooves. An isolation layer is laid on the surface of the roadbed. After the prefabricated pavement panels being assembled are leveled, self-compacting concrete is densely poured into the gap between the laid isolation layer and the prefabricated pavement panels to form an adjustment layer, and a positioning boss is formed on the adjustment layer to protrude upward and embed into each longitudinal lower groove and transverse lower groove of the prefabricated pavement panels.

Description

Technical Field

[0001] The invention relates to traffic roadbed facilities, and in particular to an assembled road surface structure and a construction method for highways and airport roads. Background Art

[0002] In the current construction of transportation projects such as highways and airport roads, cast-in-place concrete pavement structures are mostly used. The road construction process has a low degree of automation, a long on-site construction period, and is labor-intensive. It does not have the ability to be recycled and reused, and causes certain pollution to the surrounding environment during the construction process.

[0003] Prefabricated pavement is a new pavement paving concept proposed to overcome the shortcomings of traditional concrete pavement. Prefabricated pavement is prefabricated in factories and has the characteristics of sufficient strength and rigidity, good climate stability, smooth surface, surface anti-slip, durability and rapid repairability. Therefore, it has gradually received more and more attention from the engineering community at home and abroad in recent years.

[0004] Prefabricated pavement was used earlier in the United States, and there are two main forms. Post-tensioned prestressed assembled pavement panels are mainly used for new pavement paving. The advantages are that the panels are small in size and the applied prestress can effectively control the cracks between the panels. The main disadvantages are that post-tensioning is used on site, which increases the construction process and there are many transverse joints. Once a certain panel is damaged, the panels in the entire prestressed unit will fail. Non-prestressed prefabricated pavement panels are mainly used for pavement repair. The panels are large in size and thick in thickness, requiring special transportation vehicles and are difficult to transport. There are two types of panels, A and B. The A panel is prefabricated with a dowel rod, and the B panel is provided with a corresponding slot. When installing, it is necessary to consider how to lay it out. The A panel with the dowel rod must be placed horizontally, and the length and width of the panel are limited.

[0005] The application of prefabricated pavements in my country was relatively late, and the related prefabricated prestressed reinforced concrete pavement structures and design methods are still immature. Prefabricated pavements have only been used in the emergency repair of some highway and airport pavement projects.

[0006] In summary, the existing prefabricated road panels have the following main disadvantages:

[0007] First, the connection between adjacent prefabricated road panels is mainly formed by tie rods and force transmission rods and concrete poured into their installation slots, and the connection safety is poor; and before assembly construction, only a thin layer of cement mortar is poured at the bottom of the board, and the role of this layer of mortar is limited to leveling the roadbed surface. The road surface structure lacks integrity and adjustment ability, and the repair ability is weak;

[0008] Second, the prestressing technology was not considered during design and manufacturing, resulting in thicker panels and lower transportation efficiency;

[0009] 3. The tie rod and dowel rod are fixed on the prefabricated road panel, and their extended sections occupy a certain space. During transportation, a certain space must be left for the extended sections of the tie rod and dowel rod, which affects the transportation capacity;

[0010] 4. Prefabricated road panels are usually divided into A and B panels. A panels are prefabricated with force transfer rods, and B panels are provided with corresponding slots. After installation and leveling, grouting is poured through the holes on the top of the B panel slots. The lack of interchangeability brings inconvenience to the assembly construction. Summary of the invention

[0011] The technical problem to be solved by the present invention is to provide an assembled pavement structure to effectively improve the connection safety of prefabricated pavement panels, the adjustment ability and repairability of the assembled pavement, facilitate the manufacture and transportation of prefabricated pavement panels, and make assembly, emergency repair and replacement construction more convenient.

[0012] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0013] The present invention provides an assembled pavement structure, which is formed by assembling prefabricated pavement panels on a roadbed, and is characterized in that: the prefabricated pavement panels adopt a prestressed reinforced concrete structure, and each prefabricated pavement panel is provided with longitudinal lower grooves at intervals along the width direction at two longitudinal connecting ends, and transverse lower grooves at intervals along the width direction at two transverse connecting ends; two adjacent prefabricated pavement panels are provided with rod-shaped connecting components in the corresponding longitudinal lower grooves or transverse lower grooves; an isolation layer is laid on the surface of the roadbed, and after the prefabricated pavement panels being assembled are leveled, self-compacting concrete is densely poured into the gap between the laid isolation layer and the prefabricated pavement panels to form an adjustment layer, and a positioning boss is formed on the adjustment layer, which protrudes upward and is embedded in the longitudinal lower grooves and transverse lower grooves of the prefabricated pavement panels.

[0014] Another technical problem to be solved by the present invention is to provide a construction method of the above-mentioned assembled road surface structure, which comprises the following steps:

[0015] S01. Treat the roadbed base to ensure that its flatness and compaction meet the design requirements;

[0016] S02. Laying an isolation layer on the surface of the roadbed base;

[0017] S03. Accurately stake out the road surface to be paved on the isolation layer, accurately divide it into independent warehouse roads and filling warehouse road edges that are staggered horizontally and extend vertically, and mark the stakeout lines;

[0018] S04. The pallet truck transports the prefabricated road panels to the site and feeds the panels to the road panel paving machine;

[0019] S05. Install the mounting rings and fine-adjustment screws on the top and bottom surfaces of the prefabricated road panels for independent warehouse road assembly, install the fixed force transmission rod in the longitudinal lower groove on one side of the longitudinal assembly seam, and install the fixed pull rod in the transverse lower groove on one side of the transverse assembly seam;

[0020] S06. Use the pavement panel paving machine to feed the panels and accurately install the prefabricated pavement panels used for paving the independent warehouse pavement between the marked layout lines;

[0021] S07. Pave each independent warehouse road in sequence, and quickly fine-tune the three-dimensional coordinates of each prefabricated road panel;

[0022] S08. Install mortar retaining strips and pour self-compacting concrete into the independent silo. The number of poured slabs is determined according to the rhythm of the flow operation;

[0023] S09. After the self-compacting concrete of the independent silo roads reaches a certain strength, the silo filling roads between the independent silo roads are roughly paved using a road panel paving machine, and the prefabricated road panels used for paving the silo filling roads are installed between the marked stakeout lines;

[0024] S10. Pave each filling road in sequence and quickly fine-tune each prefabricated road panel;

[0025] S11. Install the grouting strips and pour the self-compacting concrete into the filling channel. The number of pouring plates is determined according to the rhythm of the flow operation;

[0026] S12. Repeat the above steps S04 to S12, and formulate the construction process according to the rhythm of the assembly line operation until the entire paved road surface is assembled and the entire adjustment layer is poured.

[0027] The beneficial effects of the present invention are mainly reflected in the following aspects:

[0028] 1. An isolation layer is set between the roadbed surface and the bottom surface of the assembled prefabricated road panel, and a self-compacting concrete is densely poured to form an adjustment layer, and a positioning boss is formed on the adjustment layer to protrude upward and embed into the longitudinal lower grooves and transverse lower grooves of the prefabricated road panel. The positioning boss and the adjustment layer are an integral structure, and the positioning boss and the rod-shaped connecting member buried therein form an integral connection structure, which can effectively improve the connection safety of the prefabricated road panel, enhance the adjustment ability and repairability of the assembled road surface, and the assembled road surface has the characteristics of high strength and good flatness;

[0029] Second, the prefabricated road panel adopts the method of applying prestress in the longitudinal and transverse directions of the panel body, which can effectively reduce the thickness of the panel body for easy transportation and effectively control the cracking of the panel body;

[0030] 3. The rod-shaped connecting components are assembled with the prefabricated road panels at the construction site, which effectively solves the problems of manufacturing and transportation. At the same time, the prefabricated road panels are uniformly of one type and can be installed in a certain direction during the construction process. The assembly construction is extremely convenient and is conducive to improving construction efficiency.

[0031] 4. Prefabricated road panels are prefabricated in factories, which can realize multiple functions such as hoisting, fine adjustment and grouting. It is very convenient to assemble adjacent prefabricated road panels.

[0032] 5. The assembly of prefabricated pavement panels adopts the "skip warehouse method" construction, with multiple lines and processes in parallel flow operation, which can be carried out in parallel at multiple points, forming a balanced, continuous, large-scale construction, reducing the construction difficulty in the harsh environment of high altitude and cold plateau, and improving the construction efficiency of pavement engineering;

[0033] 6. High-precision and high-efficiency assembly construction design of the pavement has been achieved, especially solving problems such as difficult quality assurance, many construction restrictions, long maintenance period, and high resource consumption in extremely harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] This specification includes the following nineteen drawings:

[0035] Figure 1 It is a plan view of a prefabricated pavement structure embodiment 1 of the present invention;

[0036] Figure 2 is along Figure 1 Partial cross-sectional view along line AA;

[0037] Figure 3 is along Figure 1 Partial cross-sectional view of the middle BB line;

[0038] Figure 4 It is a top view of a prefabricated road panel in an assembled road surface structure of the present invention;

[0039] Figure 5 It is a bottom view of a prefabricated road surface panel in an assembled road surface structure of the present invention;

[0040] Figure 6 It is a side view of a prefabricated road surface panel in an assembled road surface structure of the present invention;

[0041] Figure 7 It is a plan view of a second embodiment of an assembled pavement structure of the present invention;

[0042] Figure 8 It is a top view of a prefabricated road panel in an assembled road surface structure of the present invention;

[0043] Fig. 97 is a schematic diagram of a transverse connection method of adjacent prefabricated road panels in Embodiment 2 of an assembled road surface structure of the present invention;

[0044] Fig.10 is along Figure 7 Partial cross-sectional view of the CC line;

[0045] Fig.11 It is a partial cross-sectional view of a prefabricated road surface panel in a prefabricated road surface structure of the present invention at the construction auxiliary hole position;

[0046] Fig.12 It is a structural schematic diagram of a dowel bar in an assembled pavement structure of the present invention;

[0047] Fig.13 It is a structural schematic diagram of a tension rod of a force transmission rod in an assembled pavement structure of the present invention;

[0048] Fig.14 It is another structural schematic diagram of a pull rod of a force transmission rod in an assembled pavement structure of the present invention;

[0049] Fig.15 It is a structural schematic diagram of an elastic buckle in an assembled pavement structure of the present invention;

[0050] Fig.16 -19 is a schematic diagram of the construction steps of an assembled pavement structure of the present invention.

[0051] The figure shows the components and corresponding marks: roadbed 10, isolation layer 11, adjustment layer 20, positioning boss 21, prefabricated road panel 30, longitudinal lower groove 31a, transverse lower groove 31b, tie rod head slot 31c, connecting sleeve 32, exhaust hole 33, construction auxiliary hole 34, grouting hole 35, fine-adjusting screw 36, spiral sleeve 37, lifting ring 38, gate-shaped steel bar 39, force transmission rod 41, tie rod 42, step-shaped head 42a, elastic buckle 43, independent bin E, filling bin F. DETAILED DESCRIPTION

[0052] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0053] Reference Figure 1 and Figure 7The present invention provides an assembled pavement structure, wherein prefabricated pavement panels 30 are assembled on a roadbed 10 to form an assembled pavement. The prefabricated pavement panels 30 adopt a prestressed reinforced concrete structure, and each prefabricated pavement panel 30 is provided with longitudinal lower grooves 31a at intervals along the width direction at two longitudinal connection ends, and transverse lower grooves 31b at intervals along the width direction at two transverse connection ends. Two adjacent prefabricated pavement panels 30 are provided with rod-shaped connecting components in the corresponding longitudinal lower grooves 31a or transverse lower grooves 31b. An isolation layer 11 is laid on the surface of the roadbed 10, and after the prefabricated pavement panels 30 being assembled are leveled, self-compacting concrete is densely poured into the gap between the laid isolation layer 11 and the prefabricated pavement panels 30 to form an adjustment layer 20, and a positioning boss 21 is formed on the adjustment layer 20, which protrudes upward and is embedded in each longitudinal lower groove 31a and transverse lower groove 31b of the prefabricated pavement panel 30. Since the positioning boss 21 and the adjustment layer 20 are an integral structure, and the positioning boss 21 and the rod-shaped connecting member buried therein form an integral connection structure, the connection safety of the prefabricated road panel 30 can be effectively improved, the adjustment ability and repairability of the assembled road surface can be enhanced, and the assembled road surface has the characteristics of high strength and good flatness.

[0054] Reference Figure 4 , Figure 5 and 7 The surface shape of the prefabricated road panel 30 is rectangular or square, and longitudinal and transverse steel bars for applying prestress are arranged in the panel body. The prestressed reinforced concrete structure can effectively reduce the thickness of the panel body for easy transportation, and can effectively control the cracking of the panel body. In general, the panel width of the prefabricated road panel 30 should be 2.5m, the aspect ratio should be 1:1~1:2, the panel thickness is 140mm~250mm, and the prestress value applied to the panel body is determined based on the road surface load and temperature load. Chamfers are provided on the top and bottom of the panel. The chamfer of the top of the panel should be 5mm, and the chamfer of the bottom of the panel should be 10mm. As a typical configuration method, the prefabricated road panel 30 can generally be adopted in two sizes of 2.5m×5m and 2.5m×2.5m. The two types of prefabricated road panels 30 can be easily connected, and arc transitions can be achieved through different combinations.

[0055] Reference Figures 1 to 6 In the embodiment 1 shown, the rod-shaped connecting member includes a force transmission rod 41 arranged at two longitudinal connection ends of the prefabricated road panel 30, and a tension rod 42 arranged at two transverse connection ends of the prefabricated road panel 30. Fig.12 The main body of the force transmission rod 41 is a plain round steel bar, with a threaded section at one end and a sleeve at the other end. One end of the threaded section is threadedly connected to the connecting sleeve 32 embedded in the prefabricated road panel 30, and one end of the sleeve extends into the corresponding longitudinal lower groove 31a. Fig.13The main body of the pull rod 42 is a ribbed steel bar with a threaded section at one end. One end of the threaded section is threadedly connected to a connecting sleeve 32 embedded in the prefabricated road panel 30, and the other end extends into the corresponding lower transverse groove 31b.

[0056] Reference Figures 7 to 10 In the embodiment 2 shown, the rod-shaped connecting member includes a force transmission rod 41 arranged at two longitudinal connection ends of the prefabricated road panel 30, and a tension rod 42 arranged at two transverse connection ends of the prefabricated road panel 30. Fig.12 The main body of the force transmission rod 41 is a plain round steel bar, with a threaded section at one end and a sleeve at the other end. One end of the threaded section is threadedly connected to the connecting sleeve 32 embedded in the prefabricated road panel 30, and one end of the sleeve extends into the corresponding longitudinal lower groove 31a. Fig.14 The main body of the pull rod 42 is a ribbed steel bar with stepped heads 42a at both ends. Figure 8 The inner end of the lower transverse groove 31b is provided with a tie rod head slot 31c. Fig. 9 and Fig.10 The step-shaped heads 42a at both ends of the pull rod 42 are respectively located in the laterally adjacent pull rod head slots 31c, and are positioned by elastic buckles 43 installed on the step-shaped heads 42a and located in the pull rod head slots 31c. The rear end of the step-shaped heads 42a acts on the interface between the laterally lower groove 31b and the pull rod head slots 31c.

[0057] Reference by Figure 5 , Figure 6 The embodiment 1 shown and the Figure 8 , Fig.10 In the embodiment 2 shown, gate-shaped steel bars 39 are arranged at intervals on the bottom surface of the prefabricated road panel 30, and the upper part of each gate-shaped steel bar 39 extends into the body of the prefabricated road panel 30 and is fixedly connected with its reinforcement, that is, the gate-shaped steel bars 39 are pre-embedded when the road panel 30 is prefabricated, and the exposed lower part of the gate-shaped steel bars 39 is consolidated into one with the adjustment layer 20 after pouring the self-compacting concrete, which can effectively prevent the prefabricated road panel 30 from buckling, and at the same time further enhance the integrity of the prefabricated road panel 30 and the adjustment layer 20 and the flatness of the road surface. The thickness of the adjustment layer 20 is preferably 50 to 100 mm, and the specifications and configuration quantity of the gate-shaped steel bars 39 are determined according to calculations. Through finite element simulation and field test tests, the steel bar pull-out resistance of 60 to 100 kN can be obtained, which can effectively prevent the plate body from warping. Through calculation and field test, the positioning boss 21 under each prefabricated road panel 30 can provide a shear strength of 360 kN, the formed assembled road surface has a strong integrity, and the connection safety between the prefabricated road panels 30 is good. The isolation layer 11 is more convenient for the disassembly, replacement and maintenance of the prefabricated road panels 30.

[0058] Reference Figure 4 , Figure 5 and Fig. 9 The central part of the prefabricated road panel 30 is provided with grouting holes 35 at intervals in the longitudinal direction, and the grouting holes 35 are connected to the upper and lower panels. The longitudinal lower groove 31a and the transverse lower groove 31b are provided with exhaust holes 33 that connect the top wall thereof with the top surface of the prefabricated road panel 30. The grouting holes 35 are used to exhaust the gas in the longitudinal lower groove 31a and the transverse lower groove 31b when the adjustment layer 20 is poured, so that the self-compacting concrete can fully fill the cavity to form the positioning boss 21. The corners of the longitudinal lower groove 31a and the transverse lower groove 31b are both chamfered.

[0059] Reference Figure 4 , Figure 5 and Fig.11 , construction auxiliary holes 34 are arranged at intervals in the vertical and horizontal directions on the surface of the prefabricated road panel 30, and the construction auxiliary holes 34 can be used for the hoisting, leveling and grouting of the prefabricated road panel 30. The auxiliary holes 34 can be reserved in the intelligent manufacturing stage of the factory, so as to facilitate the construction hoisting, initial paving and grouting, further improve the construction efficiency, and realize the assembly construction. The spiral sleeve 37 is embedded in the auxiliary hole 34, and the upper part of the embedded spiral sleeve 37 is used to install the lifting ring 28, and the lower part is used to install the fine adjustment screw 36. The top surface of the prefabricated road panel 30 adopts a roughening structure, and the roughening is prefabricated in strips or diamonds. Its width, depth, etc. are based on the relevant specifications of the airport pavement. In addition, the prefabricated road panel 30 can also reserve a navigation light hole for the installation of the navigation light, and its prefabricated position, geometric dimensions, etc. are based on the relevant specifications of the airport pavement. A foam pad can be set on the bottom surface of the prefabricated road panel 30 to control the grouting of the bottom of the board and prevent collision damage between the board bodies.

[0060] Reference Figures 16 to 19 The present invention provides a construction method for an assembled pavement structure, comprising the following steps:

[0061] S01. Treat the roadbed 10 base layer to ensure that its flatness and compaction meet the design requirements;

[0062] S02. Laying an isolation layer 11 on the surface of the base of the roadbed 10;

[0063] S03. The road surface to be paved is precisely laid out on the isolation layer 11, and is precisely divided into the side lines of each independent warehouse road E and the filling warehouse road F that are staggered horizontally and vertically extending, and the layout lines are marked;

[0064] S04. The prefabricated road panel 30 is transported to the site by a pallet truck and fed to the road panel paving machine;

[0065] S05. The prefabricated road panel 30 for independent warehouse road assembly is installed on the top and bottom surfaces of the installation ring 28 and the fine adjustment screw 36, and the dowel rod 41 is installed in the longitudinal lower groove 31a on one side of the longitudinal assembly seam, and the fixed pull rod 42 is installed in the transverse lower groove 31b on one side of the transverse assembly seam;

[0066] S06. The prefabricated road panel 30 for paving the independent warehouse road E is accurately installed between the marked layout lines using a road panel paving machine for feeding the board;

[0067] S07. Sequentially pave each independent warehouse road E, and quickly fine-tune the three-dimensional coordinates of each prefabricated road panel 30;

[0068] S08. Install the retaining strips and pour the self-compacting concrete into the independent silo E. The number of poured slabs is determined according to the rhythm of the flow operation;

[0069] S09. After the self-compacting concrete of the independent warehouse road E reaches a certain strength, the road panel paving machine is used to roughly pave the filling road F between the independent warehouse roads E, and the prefabricated road panel 30 for paving the filling road F is installed between the marked layout lines;

[0070] S10. Pave each filling channel F in sequence, and quickly fine-tune each prefabricated channel panel 30;

[0071] S11. Install the mortar retaining strip and pour the self-compacting concrete into the filling channel F. The number of poured slabs is determined according to the rhythm of the flow operation;

[0072] S12. Repeat the above steps S04 to S12, and formulate the construction process according to the rhythm of the assembly line operation, until the entire paved road surface is assembled and the entire adjustment layer 20 is poured.

[0073] The construction method of the present invention adopts the "skipping bin method" to assemble the prefabricated road panels, and the multi-line process is parallel flow-flowed, and can be advanced in parallel at multiple points to form a balanced, continuous, large-scale construction, which reduces the construction difficulty in the harsh environment of high altitude and cold, and improves the construction efficiency of the road surface project. It realizes high-precision and high-efficiency assembly construction of the road surface, especially solves the problems of difficult quality assurance, many construction restrictions, long maintenance period, and high resource consumption in extremely harsh environments.

[0074] In the step S03, the edge lines of each independent warehouse corridor E are accurately released with the help of the CPIII precision control network, and the plane positions of each prefabricated corridor panel 30 used for assembling the independent warehouse corridor E are accurately positioned;

[0075] In the step S10, the prefabricated road panel 30 in the area is adjusted in three directions by means of CPIII measurement and intelligent detection and fine adjustment claws, and the adjustment accuracy can be controlled within 1 mm.

[0076] In step S08 and step S11, the area is sealed with a template or early-strength mortar to seal the edge of the plate, and grouting is performed. After the grouting is completed, the grouting fullness is checked using intelligent grouting and density detection equipment. If it does not meet the requirements, pressurized grouting is continued until the requirements are met. In order to ensure the automatic and stable control of pressure during grouting, displacement due to inadequate pressure control during the grouting process is avoided, and the grouting at the bottom of the road panel is ensured to be densely filled. For severely cold and low-temperature areas, the greenhouse method, external heat source, addition of quick-setting antifreeze materials or heating of mixing water can be adopted to meet the requirements of low-temperature grouting and improve assembly efficiency.

[0077] After step S11, the process of embedding and pressing sealing strips and pouring silicone sealant is adopted to achieve the pavement joint treatment through three processes of cleaning, pressing strips and pouring. Grouting treatment is also performed on the construction auxiliary holes 34, the exhaust holes 33 and the grouting holes 35. The grouting material is selected from the early strength type material, which must meet the adaptability in harsh environments such as low temperature, and the material and mix ratio are determined.

[0078] The above description is only to illustrate some principles of the prefabricated pavement structure and construction method of the present invention, and is not intended to limit the present invention to the specific structure and applicable scope shown and described. Therefore, all corresponding modifications and equivalents that may be used are within the scope of the patent applied for by the present invention.

Claims

1. An assembled pavement structure, wherein prefabricated pavement panels (30) are assembled on a roadbed (10) to form an assembled pavement, wherein: The prefabricated road panel (30) adopts a prestressed reinforced concrete structure. Each prefabricated road panel (30) is provided with longitudinal lower grooves (31a) at intervals along the width direction at two longitudinal connection ends, and transverse lower grooves (31b) are provided at intervals along the width direction at two transverse connection ends; two adjacent prefabricated road panels (30) are provided with rod-shaped connecting components in the corresponding longitudinal lower grooves (31a) or transverse lower grooves (31b); an isolation layer (11) is laid on the surface of the roadbed (10); after the prefabricated road panel (30) being assembled is leveled, self-compacting concrete is densely poured into the gap between the laid isolation layer (11) and the prefabricated road panel (30) to form an adjustment layer (20), and a positioning boss (21) is formed on the adjustment layer (20) and is embedded in each longitudinal lower groove (31a) and transverse lower groove (31b) of the prefabricated road panel (30).

2. The assembled pavement structure according to claim 1, characterized in that: The rod-shaped connecting member comprises a force transmission rod (41) arranged at two longitudinal connecting ends of the prefabricated road panel (30), and a pull rod (42) arranged at two transverse connecting ends of the prefabricated road panel (30).

3. The assembled pavement structure according to claim 2, characterized in that: The main body of the force transmission rod (41) is a plain round steel bar, one end of which is provided with a threaded section and the other end of which is provided with a sleeve. One end of the threaded section is threadedly connected to a connecting sleeve (32) embedded in the prefabricated road panel (30), and one end of the sleeve extends into the corresponding longitudinal lower groove (31a).

4. The assembled pavement structure according to claim 2, characterized in that: The main body of the pull rod (42) is a ribbed steel bar, one end of which is provided with a threaded section, one end of which is threadedly connected to a connecting sleeve (32) embedded in the prefabricated road panel (30), and the other end extends into the corresponding transverse lower groove (31b).

5. The assembled pavement structure according to claim 2, characterized in that: The main body of the pull rod (42) is a ribbed steel bar with stepped heads (42a) at both ends; a pull rod head slot (31c) is arranged at the inner end of the transverse lower groove (31b); the stepped heads (42a) at both ends of the pull rod (42) are respectively located in the laterally adjacent pull rod head slots (31c), and are positioned by elastic buckles (43) installed on the stepped heads (42a) and located in the pull rod head slots (31c); the rear end of the stepped heads (42a) acts on the interface between the transverse lower groove (31b) and the pull rod head slot (31c).

6. The assembled pavement structure according to claim 1, characterized in that: The prefabricated road panel (30) has a rectangular or square surface shape, and reinforcement is arranged inside the panel body, the reinforcement including longitudinal reinforcement and transverse reinforcement for applying prestress.

7. The assembled pavement structure according to claim 2, characterized in that: Gate-shaped steel bars (39) are arranged at intervals on the bottom surface of the prefabricated road panel (30), the upper part of each gate-shaped steel bar (39) extends into the body of the prefabricated road panel (30) and is fixedly connected with its reinforcement, and the exposed lower part is consolidated into one with the adjustment layer (20) after pouring self-compacting concrete; the thickness of the adjustment layer is preferably 50-100 mm.

8. The assembled pavement structure according to claim 6, characterized in that: Grouting holes (35) are longitudinally spaced apart in the central portion of the surface of the prefabricated road panel (30), and the grouting holes (35) are connected to the upper and lower surfaces; and exhaust holes (33) are provided in the longitudinal lower groove (31a) and the transverse lower groove (31b) to connect the top wall thereof with the top surface of the prefabricated road panel (30).

9. The assembled pavement structure according to claim 1, characterized in that: The prefabricated road panel (30) is provided with construction auxiliary holes (34) at intervals in the vertical and horizontal directions. A spiral sleeve (37) is embedded in the auxiliary hole (34). The upper part of the embedded spiral sleeve (37) is used to install the lifting ring (28), and the lower part is used to install the fine adjustment screw (36).

10. A construction method for an assembled pavement structure as claimed in any one of claims 1 to 9, comprising the following steps: S01. Treat the roadbed (10) base to ensure that its flatness and compaction meet the design requirements; S02. Laying an isolation layer (11) on the surface of the base of the roadbed (10); S03. The road surface to be paved is precisely laid out on the isolation layer (11), and is precisely divided into the side lines of each independent warehouse road (E) and the filling warehouse road (F) that are staggered horizontally and extend vertically, and the layout lines are marked; S04. The prefabricated road panel (30) is transported to the site by a pallet truck and fed to the road panel paving machine; S05. Install the mounting ring (28) and the fine adjustment screw (36) on the top and bottom surfaces of the prefabricated road panel (30) for independent warehouse road assembly, install the fixed force transmission rod (41) in the longitudinal lower groove (31a) on one side of the longitudinal assembly seam, and install the fixed pull rod (42) in the transverse lower groove (31b) on one side of the transverse assembly seam; S06. The prefabricated road panel (30) for paving the independent warehouse road (E) is accurately installed between the marked stakeout lines by using a road panel paving machine for feeding the board; S07. Pave each independent warehouse road (E) in sequence, and quickly fine-tune the three-dimensional coordinates of each prefabricated road panel (30); S08. Install the mortar retaining strip and pour the self-compacting concrete into the independent silo (E). The number of poured slabs is determined according to the rhythm of the flow operation; S09. After the self-compacting concrete of the independent silo (E) reaches a certain strength, the filling silo (F) between each independent silo (E) is roughly paved using a road panel paving machine, and the prefabricated road panel (30) for paving the filling silo (F) is installed between the marked stakeout lines; S10. sequentially paving each filling road (F), and quickly fine-tuning each prefabricated road panel (30); S11. Install the retaining strip and pour the self-compacting concrete into the filling channel (F). The number of poured plates is determined according to the rhythm of the flow operation; S12. Repeat the above steps S04 to S12, and formulate the construction process according to the rhythm of the assembly line operation until the entire paved road surface is assembled and the entire adjustment layer (20) is poured.

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