A concrete pavement structure and its construction method

Abstract

The present invention provides a concrete pavement structure and a construction method thereof, which solve the problems that the method of using a pre-buried warm air duct installation layer to heat and de-ice an icy road has a low energy utilization efficiency during use, and the warm air duct installation layer is relatively close to the ground surface and is easily damaged. The present invention includes a natural compaction base layer, a heat source layer is laid above the natural compaction base layer, the heat source layer includes a plurality of precast heat source plates spliced one by one in the left-right direction, and an electric heating component is arranged in the precast heat source plate; a load-bearing protection layer is laid above the heat source layer, the load-bearing protection layer includes a plurality of precast protection plates spliced one by one in the left-right direction, the precast protection plates are arranged to cover the joints between two adjacent precast heat source plates, so that the joints of the load-bearing protection layer are offset left and right from the joints of the heat source layer; heat conduction tubes are pre-buried in the precast protection plates, and the heat conduction tubes correspond one by one vertically to the heat source points formed by the electric heating components; a road surface layer is laid above the load-bearing protection layer.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, in particular to a concrete pavement structure and a construction method thereof. Background Art

[0002] Most of my country is covered with ice and snow, and the problem of snow and ice accumulation on the road surface (i.e. asphalt concrete road surface) is relatively common. Especially in early winter and early spring, the snow on the road is prone to form thin ice on the road surface under the influence of temperature changes and vehicle loads, which affects road traffic safety. According to analysis, ice and snow greatly reduce the road adhesion coefficient, significantly reduce the adhesion, and the braking stability and steering stability of the vehicle will deteriorate. In addition, driving on ice and snow roads can easily blur the driver's vision due to long-term strong light reflection stimulation, which leads to frequent traffic accidents. The traffic accident rate on ice and snow days has increased significantly.

[0003] In order to realize automatic snow removal on roads, the patent document with application number 2017102398500 discloses a method for the construction of asphalt concrete pavement on municipal roads, in which a warm air pipe installation layer is added between the road base and the asphalt surface to achieve the purpose of heating and deicing. However, this method still has the following disadvantages: (1) Since the heat source of this method is to heat the air externally and then transport the hot air to the warm air pipe installation layer pre-buried under the road surface through a pipeline, in actual use, due to the low temperature of the road icy weather, when the hot air is transported to the warm air pipe installation layer through the pipeline, the heat loss is large, the energy utilization efficiency is low, and the operating cost is high; (2) The warm air pipe installation layer is close to the ground surface. After the road surface is damaged, the warm air pipe installation layer is easily damaged, resulting in pipe damage and leakage. Summary of the invention

[0004] In order to solve the problems in the background technology of using a pre-buried warm air pipe installation layer to heat and de-ice icy roads, such as low energy utilization efficiency during use, and the warm air pipe installation layer is close to the ground surface and is easily damaged, the present invention proposes a concrete pavement structure and a construction method thereof.

[0005] The technical solution of the present invention is: a concrete pavement structure, comprising a natural compacted base, a heat source layer is laid on the natural compacted base, and the heat source layer comprises a plurality of prefabricated heat source plates spliced ​​one by one along the left and right directions;

[0006] An electric heating component is provided in the prefabricated heat source plate, and the electric heating component forms a plurality of heat source points in the prefabricated heat source plate, and the heat source points are evenly distributed in the prefabricated heat source plate; the electric heating component is electrically connected to a temperature control system, and the temperature control system is located outside the road, and the temperature control system is connected to a municipal power grid point;

[0007] A load-bearing protection layer is laid above the heat source layer. The load-bearing protection layer includes a number of precast protection plates spliced one by one in the left-right direction. The precast protection plates are arranged to cover the joints between adjacent two precast heat source plates, so that the joints of the load-bearing protection layer are horizontally offset from the joints of the heat source layer.

[0008] A number of vertically penetrating heat conduction tubes are embedded in the precast protection plates. The heat conduction tubes correspond one by one vertically to the heat source points formed by the electric heating components. A heat conduction sealing plate is provided at the top of the heat conduction tube to seal the top port of the heat conduction tube.

[0009] A road surface layer is laid above the load-bearing protection layer.

[0010] Preferably, an anti-disengagement hook structure is provided at the joint of adjacent precast heat source plates. The anti-disengagement hook structure is used to hook and connect adjacent precast heat source plates in the left-right direction to prevent adjacent precast heat source plates from separating from each other in the left-right direction.

[0011] Preferably, there are two precast protection plates in the front-back direction of the load-bearing protection layer. One end of each of the two precast protection plates close to each other is connected to the second limit connecting piece. The second limit connecting piece is used to prevent the two adjacent precast protection plates in the front-back direction from separating from each other in the front-back direction.

[0012] Preferably, a second heat insulation tube is embedded in the precast heat source plate. The upper port of the second heat insulation tube communicates with the outside. The lower port of the second heat insulation tube corresponds vertically to the heat source point. The upper port of the second heat insulation tube corresponds vertically to the lower port of the heat conduction tube.

[0013] Preferably, the electric heating component includes a number of electric heating tubes arranged at intervals in the left-right direction. The electric heating tubes extend in the front-back direction.

[0014] A number of first heat insulation tubes are embedded in the precast heat source plate. The first heat insulation tubes extend in the front-back direction. One end of the first heat insulation tube is inserted into the precast heat source plate, and the other end of the first heat insulation tube is flush with the rear side surface of the precast heat source plate to form an external leakage port.

[0015] The electric heating tube is inserted into the first heat insulation tube, and a sealing plate is provided at the external leakage port of the first heat insulation tube.

[0016] The lower end of the second heat insulation tube is fixedly connected to the first heat insulation tube, and the lower port of the second heat insulation tube communicates with the inside of the first heat insulation tube.

[0017] Preferably, the first heat insulation tube includes a steel pipe and a heat insulation layer wrapped outside the steel pipe. The second heat insulation tube has the same structure as the first heat insulation tube.

[0018] Preferably, a first steel bar framework is embedded in the precast heat source plate. Both the first heat insulation tube and the second heat insulation tube are located between the spaces of the first steel bar framework.

[0019] The precast protection board is embedded with a second steel bar framework, and the heat conduction pipes are located between the second steel bar frameworks.

[0020] Preferably, a plurality of first positioning holes penetrating up and down are provided on the precast heat source board, and second positioning holes corresponding to the first positioning holes one by one up and down are provided on the precast protection board. A positioning drill rod is inserted into the second positioning hole and the first positioning hole, and the lower end of the positioning drill rod is inserted into the natural compacted base layer.

[0021] Preferably, the precast protection board is provided with a groove grid, the groove grid is an upward-opening and criss-cross grid-shaped strip groove, the upper ports of the heat conduction pipes are located at the cross nodes of the groove grid, and the second positioning holes are located in the grid gaps of the groove grid;

[0022] The grooves of the groove grid are filled with heat conduction grid strip plates, the heat conduction grid strip plates are pressed above the heat conduction sealing plate, and the bottom of the heat conduction grid strip plate is in contact with the top of the heat conduction sealing plate, and the top of the heat conduction grid strip plate is flush with the top surface of the precast protection board.

[0023] A construction method for a concrete pavement structure includes the following steps: S1~Compacting the natural soil base to form a natural compacted base layer;

[0024] S2~Install the electric heating component into the precast heat source board, and then sequentially lay the precast heat source boards along the left-right direction on the natural compacted base layer to form a heat source layer;

[0025] S3~On the heat source layer, cover and arrange the precast protection board above the joints of two adjacent precast heat source boards, adjust the position of the precast protection board so that the heat conduction pipes in the precast protection board correspond to the heat source points formed by the electric heating components one by one up and down, and then sequentially lay the precast protection boards along the left-right direction to form a load-bearing protection layer;

[0026] S4~Pave asphalt or concrete on the load-bearing protection layer to form a road surface layer;

[0027] S5~Electrically connect the electric heating component to the temperature control system outside the road, and connect the temperature control system to the municipal power grid point.

[0028] Advantages of the present invention: (1) In the present invention, a load-bearing protection layer is erected between the heat source layer and the road surface layer. First, it avoids the problem that the heat source layer is easily damaged due to being close to the ground surface layer. Second, it further isolates the heat source layer from the external air, so as to form an "underground" environment around the heat source layer, reduce the influence of the external temperature difference on the heat source layer, reduce the energy loss of the heat source, and improve the energy utilization efficiency.

[0029] (2) The heat conduction pipes installed in the precast protection board are used for: first, directly conducting most of the heat upward along the heat conduction pipes to heat and de-ice the road surface; second, dissipating a small part of the heat to the surrounding concrete in the precast protection board through the pipe wall of the heat conduction pipes, increasing the temperature of the precast protection board, reducing the probability of crack formation caused by thermal expansion and contraction of the precast protection board 18 due to excessive temperature difference, and improving the structural stability of the precast protection board.

[0030] (3) Installing the electric heating component directly in the heat source layer under the road, greatly shortening the path length of the heat transfer pipeline, reducing the frictional heat loss, and improving the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a partial internal structure diagram of a vertical section during use in Embodiment 1;

[0033] Figure 2 For Figure 1 the internal structure schematic diagram of the precast heat source board in

[0034] Figure 3 For Figure 1 the external structure schematic diagram from a top view angle of

[0035] Figure 4 For Figure 1 the structure schematic diagram from a top view angle of the heat source layer in

[0036] Figure 5 For Figure 1 the internal structure schematic diagram of the precast protection board in

[0037] Figure 6 For Figure 5 the external structure schematic diagram from a top view angle of (without installing the heat conduction grid strip board);

[0038] Figure 7 For Figure 1 the structure schematic diagram from a top view angle of the load-bearing protection layer in (after installing the heat conduction grid strip board);

[0039] Figure 8 For Figure 4 the partial structure schematic diagram from a right view angle of the first limiting connector in

[0040] In the figure, 1 is the natural compaction base layer, 2 is the prefabricated heat source plate, 3 is the first steel bar framework, 4 is the upper clamping plate, 5 is the lower hook plate, 6 is the first heat insulation pipe, 7 is the electric heating pipe, 8 is the second heat insulation pipe, 9 is the filter screen, 10 is the first positioning hole, 11 is the first dovetail groove, 12 is the first limiting connecting piece, 1201 is the connecting plate, and 1202 is the dovetail-shaped wedge bar.

[0041] 13 is the wire, 14 is the branch cable, 15 is the temperature controller, 16 is the temperature sensor, 17 is the municipal cable, 18 is the prefabricated protection plate, 19 is the second steel bar framework, 20 is the heat conduction pipe, 21 is the heat conduction sealing plate, 22 is the pressing groove grid, 23 is the heat conduction grid strip plate, 24 is the second dovetail groove, 25 is the second connecting strip, 26 is the second positioning hole, 27 is the positioning drill rod, and 28 is the road surface surface layer. Specific implementation mode

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Embodiment 1: A concrete road surface structure, as Figure 1 shown, includes a natural compaction base layer 1, and a heat source layer is laid above the natural compaction base layer 1. The heat source layer includes a plurality of prefabricated heat source plates 2 spliced one by one in the left-right direction. A plurality of first positioning holes 10 penetrating up and down are provided on the prefabricated heat source plates 2.

[0044] An anti-disengagement hook structure is provided at the splicing position of adjacent prefabricated heat source plates 2. The anti-disengagement hook structure is used to hook and connect adjacent prefabricated heat source plates 2 in the left-right direction to prevent adjacent prefabricated heat source plates 2 from separating from each other in the left-right direction.

[0045] Specifically, as Figure 1 and Figure 2 shown, the anti-disengagement hook structure includes an upper clamping plate 4 and a lower hook plate 5, and both the upper clamping plate 4 and the lower hook plate 5 are L-shaped plate structures. The upper clamping plate 4 is fixedly arranged on the left side of the prefabricated heat source plate 2, and the lower hook plate 5 is fixedly arranged on the right side of the prefabricated heat source plate 2. Adjacent upper clamping plates 4 and lower hook plates 5 are hooked and connected in the left-right direction.

[0046] In order to reduce the self-weight of the prefabricated heat source plate 2 and improve the construction speed of the transportation and position adjustment of the prefabricated heat source plate 2, as Figure 7 shown, in this embodiment, two prefabricated heat source plates 2 are provided in the front-rear direction in the heat source layer, so that the prefabricated heat source plate 2 exactly corresponds to the oncoming lane above during use.

[0047] During installation, in order to enhance the stability of the two prefabricated heat source plates 2 in the front-rear direction after installation, one end of each of the two prefabricated heat source plates 2 close to each other is connected to the first limit connecting member 12, and the first limit connecting member 12 is used to prevent two adjacent prefabricated heat source plates 2 from separating from each other in the front-rear direction.

[0048] Specifically, as Figure 3 and Figure 8 shown, first dovetail grooves 11 are formed at the tops of the opposite ends of two adjacent prefabricated heat source plates 2 in the front-rear direction. Correspondingly, as Figure 8 shown, the first limit connecting member 12 in this embodiment includes a connecting plate 1201 and two dovetail-shaped wedges 1202 fixedly arranged at intervals in the front-rear direction at the bottom of the connecting plate 1201, and the dovetail-shaped wedges 1202 are inserted into the first dovetail grooves 11.

[0049] An electric heating component is provided in the prefabricated heat source plate 2, and the electric heating component includes a plurality of electric heating tubes 7 arranged at intervals in the left-right direction, and the electric heating tubes 7 extend in the front-rear direction.

[0050] In order to reduce the loss of heat energy generated by the electric heating component during heating in the prefabricated heat source plate 2, as Figure 2 shown, a plurality of first heat-insulating tubes 6 are embedded in the prefabricated heat source plate 2, the first heat-insulating tubes 6 extend in the front-rear direction, one end of the first heat-insulating tube 6 is inserted into the prefabricated heat source plate 2, and the other end of the first heat-insulating tube 6 is flush with the rear side surface of the prefabricated heat source plate 2 to form an external leakage port.

[0051] The electric heating tubes 7 are inserted into the first heat-insulating tubes 6, and the inner diameter of the first heat-insulating tubes 6 is larger than the outer diameter of the electric heating tubes 7 to provide a smooth flow space for the air heated in the first heat-insulating tubes 6. A sealing plate is provided at the external leakage port of the first heat-insulating tube 6 to prevent external rainwater from entering the first heat-insulating tube 6.

[0052] A plurality of second heat-insulating tubes 8 are embedded in the prefabricated heat source plate 2, the lower ends of the second heat-insulating tubes 8 are fixedly connected to the first heat-insulating tubes 6, and the lower ports of the second heat-insulating tubes 8 are communicated with the interiors of the first heat-insulating tubes 6, so that the heat after the electric heating tubes 7 are heated in the first heat-insulating tubes 6 can be directly conducted upward through the second heat-insulating tubes 8. The upper ports of the second heat-insulating tubes 8 are communicated with the outside, so that the upper ports of the second heat-insulating tubes 8 form heat source points.

[0053] The first heat-insulating tube 6 includes a steel pipe and a heat-insulating layer wrapped outside the steel pipe, and the second heat-insulating tube 8 has the same structure as the first heat-insulating tube 6. The steel pipes in the second heat-insulating tube 8 and the first heat-insulating tube 6 can not only protect the electric heating tubes 7 and prevent the electric heating tubes 7 from being squeezed, but also the steel pipes in the second heat-insulating tube 8 and the first heat-insulating tube 6 can also enhance the structural strength of the prefabricated heat source plate 2.

[0054] To further enhance the structural strength of the prefabricated heat source plate 2, a first steel bar framework 3 is embedded in the prefabricated heat source plate 2, and both the first heat insulation pipe 6 and the second heat insulation pipe 8 are located between the gaps of the first steel bar framework 3.

[0055] To prevent large particle debris from falling into the second heat insulation pipe 8 during construction, thereby blocking the heat conduction channel formed by the second heat insulation pipe 8, as Figure 2 and Figure 3 shown, in this embodiment, a filter screen 9 is fixedly provided at the top of the second heat insulation pipe 8.

[0056] The wires 13 extending from the electric heating pipe 7 are connected to the branch cable 14 one by one. A temperature control system is provided on the branch cable 14, and the temperature control system is located outside the road. The temperature control system controls the automatic on and off of the electric heating pipe 7 by monitoring the temperature of the outside air.

[0057] Specifically, the temperature control system in this embodiment includes a temperature controller 15 and a temperature sensor 16. The temperature controller 15 is electrically connected to the branch cable 14, and the temperature controller 15 is signal-connected to the temperature sensor 16.

[0058] To ensure sufficient and stable power during power consumption, in this embodiment, the branch cable 14 is connected to the municipal cable 17 to adopt the municipal power grid for power supply.

[0059] To protect the heat source layer and prevent the heat source layer from being easily damaged due to being relatively close to the ground surface layer, in this embodiment, as Figure 1 shown, a load-bearing protective layer is laid above the heat source layer, and a road surface layer 28 is laid above the load-bearing protective layer.

[0060] As Figure 1 shown, the load-bearing protective layer includes a plurality of prefabricated protection plates 18 spliced one by one in the left-right direction. The prefabricated protection plates 18 are covered above the joints of two adjacent prefabricated heat source plates 2, so that the joints of the load-bearing protective layer are left-right misaligned with the joints of the heat source layer.

[0061] A plurality of heat conduction pipes 20 that are vertically through are embedded in the prefabricated protection plate 18, and the lower ports of the heat conduction pipes 20 correspond to the upper ports of the second heat insulation pipes 8 up and down.

[0062] To prevent asphalt or concrete from entering the heat conduction pipes 20 during the paving of the road surface layer 28, resulting in blockage of the heat conduction pipes 20 and slower heat conduction, in this embodiment, a heat conduction sealing plate 21 is provided at the top of the heat conduction pipes 20, and the heat conduction sealing plate 21 is used to seal the ports at the top of the heat conduction pipes 20.

[0063] The heat conduction pipe 20 is used to guide the heat in the second heat insulation pipe 8 in two parts: a large part of the heat continues to go upward directly along the heat conduction pipe 20, and a small part of the heat starts to be dissipated to the concrete around the precast protection plate 18 through the pipe wall of the heat conduction pipe 20, so as to increase the temperature of the precast protection plate 18, reduce the probability of cracks formed by thermal expansion and contraction of the precast protection plate 18 due to excessive temperature difference, and improve the structural stability of the precast protection plate 18.

[0064] In addition to the above functions, the precast protection plate 18 also further isolates the precast heat source plate 2 from the external air, so as to form an "underground" environment around the precast heat source plate 2, reduce the influence of the external temperature difference on the precast heat source plate 2, reduce the energy loss of the heat source, and improve the energy utilization efficiency.

[0065] To strengthen the structural strength of the precast protection plate 18, as Figure 1 and Figure 5 shown, a second steel bar skeleton 19 is embedded in the precast protection plate 18, and the heat conduction pipe 20 is located between the second steel bar skeletons 19.

[0066] In this embodiment, both the precast heat source plate 2 and the precast protection plate 18 are precast with concrete.

[0067] To improve the stability of the precast heat source plate 2 and the precast protection plate 18 during use and prevent the precast heat source plate 2 and the precast protection plate 18 from slipping, as Figure 1 、 Figure 3 and Figure 4 shown, a plurality of first positioning holes 10 penetrating up and down are provided on the precast heat source plate 2. Correspondingly, as Figure 1 and Figure 6 shown, second positioning holes 26 corresponding to the first positioning holes 10 one by one up and down are provided on the precast protection plate 18, and positioning drill rods 27 are inserted into the second positioning holes 26 and the first positioning holes 10, and the lower ends of the positioning drill rods 27 are inserted into the natural compacted base layer 1.

[0068] To increase the contact area between the heat dissipated from the upper port of the heat conduction pipe 20 and the upper road surface layer 28 and accelerate the heat conduction, as Figure 6 shown, the precast protection plate 18 is provided with a press groove grid 22. The press groove grid 22 is an upward-opening and criss-cross grid-shaped strip groove, the upper port of the heat conduction pipe 20 is located at the intersection node of the press groove grid 22, and the second positioning holes 26 are located in the grid gaps of the press groove grid 22.

[0069] As Figure 7 shown, the grooves of the press groove grid 22 are filled with heat conduction grid strip plates 23. The heat conduction grid strip plates 23 are pressed above the heat conduction sealing plate 21, and the bottom of the heat conduction grid strip plates 23 is in contact with the top of the heat conduction sealing plate 21, and the top of the heat conduction grid strip plates 23 is flush with the top surface of the precast protection plate 18.

[0070] When the heat conducts upward from the upper port of the heat conduction pipe 20, under the adjustment of the heat conduction grid strip plate 23, a rapid heat conduction channel of point (heat conduction pipe 20) - net (heat conduction grid strip plate 23) - surface (road surface layer 28) can be formed, so that the temperature of the road surface layer 28 can be rapidly and evenly increased for deicing.

[0071] In order to reduce the self-weight of the precast protection plate 18 and improve the construction speed of the transportation and position adjustment of the precast protection plate 18, as Figure 7 shown, in this embodiment, there are two precast protection plates 18 provided in the front-back direction for the load-bearing protection layer, so as to exactly form an up-down correspondence with the oncoming lane above during use. During installation, in order to strengthen the stability of the two precast protection plates 18 in the front-back direction after installation, one end of the two precast protection plates 18 close to each other is connected to the second limit connecting piece, and the second limit connecting piece is used to prevent the two adjacent precast protection plates 18 from separating from each other in the front-back direction.

[0072] Specifically, as Figure 6 and Figure 8 shown, second dovetail grooves 24 are provided at the tops of the opposite ends of two adjacent precast protection plates 18 in the front-back direction. The second dovetail groove 24 has the same structure as the first dovetail groove 11. Correspondingly, the second limit connecting piece in this embodiment has the same structure as the first limit connecting piece 12.

[0073] When the road surface layer 28 is damaged and needs to be repaired, since the precast protection plate 18 isolates the precast heat source plate 2, when using a road breaking machine for road breaking and re-repair construction, there is no need to worry too much about damaging the electric heating components in the precast heat source plate 2.

[0074] A construction method for a concrete road surface structure includes the following steps: S1~Compacting the natural soil base to form a natural compacted base layer 1.

[0075] S2~Install the electric heating components into the precast heat source plate 2, and then lay the precast heat source plates 2 in sequence along the left-right direction on the natural compacted base layer 1 to form a heat source layer.

[0076] S3~On the heat source layer, cover and arrange the precast protection plates 18 above the joints of two adjacent precast heat source plates 2, adjust the positions of the precast protection plates 18 so that the heat conduction pipes 20 in the precast protection plates 18 correspond one by one with the heat source points formed by the electric heating components up and down, drive the lower ends of the positioning drill rods 27 into the natural compacted base layer 1 along the first positioning holes 10 and the second positioning holes 26, and then lay the precast protection plates 18 in sequence along the left-right direction to form a load-bearing protection layer.

[0077] S4~Pave asphalt or concrete on the load-bearing protective layer to form the road surface layer 28.

[0078] S5~Electrically connect the electric heating component to the temperature control system outside the road, and connect the temperature control system to the municipal power grid.

[0079] Embodiment 2: A concrete road surface structure. In this embodiment, the electric heating component is controllably connected to the controller, and the controller is controllably connected to the road monitoring equipment and temperature detection equipment installed on both sides of the road. For its specific operating principle, reference can be made to the relevant content in the published document with the application number 2017102398500. Other structures are the same as those in Embodiment 1.

[0080] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A concrete pavement structure, characterized in that: It includes a natural compacted base course (1), and a heat source layer is laid above the natural compacted base course (1). The heat source layer includes a number of precast heat source plates (2) spliced one by one in the left-right direction; An electric heating component is provided in the precast heat source plate (2). The electric heating component forms a number of heat source points in the precast heat source plate (2), and the heat source points are evenly distributed in the precast heat source plate (2); The electric heating component is electrically connected to a temperature control system. The temperature control system is located outside the road, and the temperature control system is connected to the municipal power grid point; A load-bearing protection layer is laid above the heat source layer. The load-bearing protection layer includes a number of precast protection plates (18) spliced one by one in the left-right direction. The precast protection plate (18) is covered above the joint of two adjacent precast heat source plates (2) so that the joint of the load-bearing protection layer is offset from the joint of the heat source layer in the left-right direction; A number of heat conduction tubes (20) that are vertically penetrated are embedded in the precast protection plate (18). The heat conduction tubes (20) correspond one by one vertically to the heat source points formed by the electric heating component. A heat conduction sealing plate (21) is provided at the top of the heat conduction tube (20), and the heat conduction sealing plate (21) is used to seal the port at the top of the heat conduction tube (20); A road surface layer (28) is laid above the load-bearing protection layer; The precast protection plate (18) is provided with a pressing groove grid (22). The pressing groove grid (22) is an upward-opening and criss-cross grid-shaped strip groove, and the upper port of the heat conduction tube (20) is located at the intersection node of the pressing groove grid (22); The groove of the pressing groove grid (22) is filled with a heat conduction grid strip plate (23). The heat conduction grid strip plate (23) is pressed above the heat conduction sealing plate (21), and the bottom of the heat conduction grid strip plate (23) is in contact with the top of the heat conduction sealing plate (21), and the top of the heat conduction grid strip plate (23) is flush with the top surface of the precast protection plate (18).

2. The concrete pavement structure according to claim 1, characterized in that: An anti-disengagement hook structure is provided at the splicing place of adjacent precast heat source plates (2). The anti-disengagement hook structure is used to hook and connect adjacent precast heat source plates (2) in the left-right direction to prevent adjacent precast heat source plates (2) from disengaging from each other in the left-right direction.

3. A concrete pavement structure according to claim 2, characterized in that: There are two precast protection plates (18) in the front-back direction of the load-bearing protection layer. One ends of the two precast protection plates (18) close to each other are both connected to a second limit connecting piece, and the second limit connecting piece is used to prevent two adjacent precast protection plates (18) in the front-back direction from disengaging from each other in the front-back direction.

4. A concrete pavement structure according to any one of claims 1 to 3, characterized in that: A second heat insulation tube (8) is embedded in the precast heat source plate (2). The upper port of the second heat insulation tube (8) communicates with the outside. The lower port of the second heat insulation tube (8) corresponds vertically to the heat source point, and the upper port of the second heat insulation tube (8) corresponds vertically to the lower port of the heat conduction tube (20).

5. A concrete pavement structure according to claim 4, characterized in that: The electric heating component includes a number of electric heating tubes (7) arranged at intervals in the left-right direction, and the electric heating tubes (7) extend in the front-back direction; A number of first heat insulation tubes (6) are embedded in the precast heat source plate (2). The first heat insulation tubes (6) extend in the front-back direction. One end of the first heat insulation tube (6) is inserted into the precast heat source plate (2), and the other end of the first heat insulation tube (6) is flush with the rear side surface of the precast heat source plate (2) to form an externally exposed port; The electric heating tube (7) is inserted into the first heat-insulating tube (6), and a sealing plate is provided at the externally exposed port of the first heat-insulating tube (6). The lower end of the second heat-insulating tube (8) is fixedly connected to the first heat-insulating tube (6), and the lower port of the second heat-insulating tube (8) is communicated with the inside of the first heat-insulating tube (6).

6. A concrete pavement structure according to claim 5, characterized in that: The first heat-insulating tube (6) includes a steel pipe and a heat-insulating layer wrapped outside the steel pipe, and the second heat-insulating tube (8) has the same structure as the first heat-insulating tube (6).

7. A concrete pavement structure according to claim 6, characterized in that: A first steel bar framework (3) is embedded in the prefabricated heat source plate (2), and both the first heat-insulating tube (6) and the second heat-insulating tube (8) are located between the spaces of the first steel bar framework (3). A second steel bar framework (19) is embedded in the prefabricated protection plate (18), and the heat conduction tube (20) is located between the second steel bar frameworks (19).

8. A concrete pavement structure according to claim 1 or 2 or 3 or 5 or 6 or 7, characterized in that: A plurality of first positioning holes (10) that are vertically penetrating are provided on the prefabricated heat source plate (2), and second positioning holes (26) that are vertically corresponding to the first positioning holes (10) one by one are provided on the prefabricated protection plate (18). A positioning drill rod (27) is inserted into the second positioning holes (26) and the first positioning holes (10), and the lower end of the positioning drill rod (27) is inserted into the natural compacted base layer (1). The second positioning holes (26) are located within the grid gaps of the grooved grid (22).

9. The construction method of a concrete pavement structure according to any one of claims 1 to 8, characterized in that, It includes the following steps: S1~ Compacting the natural soil base to form a natural compacted base layer (1); S2~ Install the electric heating component into the prefabricated heat source plate (2), and then sequentially lay the prefabricated heat source plates (2) along the left-right direction on the natural compacted base layer (1) to form a heat source layer. S3~ On the heat source layer, cover and arrange the prefabricated protection plate (18) above the joints of two adjacent prefabricated heat source plates (2), adjust the position of the prefabricated protection plate (18) so that the heat conduction tubes (20) in the prefabricated protection plate (18) are vertically corresponding to the heat source points formed by the electric heating components one by one, and then sequentially lay the prefabricated protection plates (18) along the left-right direction to form a load-bearing protection layer. S4~ Spread asphalt or concrete on the load-bearing protection layer to form a road surface layer (28). S5~ Electrically connect the electric heating component to the temperature control system outside the road, and connect the temperature control system to the municipal power grid point.

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