CN115627673A - Concrete pavement structure and construction method thereof - Google Patents

Abstract

The invention provides a concrete pavement structure and a construction method thereof, and solves the problems that an ice road is heated and deiced by adopting a pre-embedded warm air pipe installation layer, the energy utilization efficiency is low when the concrete pavement structure is used, and the warm air pipe installation layer is easy to damage due to the fact that the warm air pipe installation layer is close to the surface layer of the ground. The heat source layer comprises a plurality of prefabricated heat source plates which are spliced one by one along the left and right directions, and electric heating parts are arranged in the prefabricated heat source plates; a bearing protection layer is laid above the heat source layer and comprises a plurality of prefabricated protection plates which are spliced one by one along the left-right direction, and the prefabricated protection plates are covered and arranged above the splicing seams of two adjacent prefabricated heat source plates so as to enable the splicing seams of the bearing protection layer and the splicing seams of the heat source layer to be staggered left and right; heat conduction pipes are embedded in the prefabricated protection plate and correspond to heat source points formed by the electric heating parts up and down one by one; and a pavement surface layer is laid above the bearing protective layer.

Description

Concrete pavement structure and construction method thereof

Technical Field

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

Background

Most areas of China belong to ice and snow areas, and the problem of snow accumulation and icing on the road surface (namely the asphalt concrete road surface) is common. Particularly in early winter and early spring, thin ice is easily formed on the surface of the pavement under the action of temperature change and vehicle load of accumulated snow on the pavement, and the traffic safety of the road is influenced. According to analysis, the ice and snow greatly reduce the road surface adhesion coefficient, the adhesion is obviously reduced, the braking stability and the steering operation stability of the vehicle are poor, and when the vehicle runs on the ice and snow road surface, the sight of a driver is easily blurred due to long-time strong light reflection stimulation, so that traffic accidents frequently occur, and the traffic accident rate is obviously increased in ice and snow days.

In order to achieve automatic snow removal of roads, a patent document with the application number of 2017102398500 discloses a construction method of a municipal road asphalt concrete pavement, wherein a warm air pipe installation layer is additionally arranged between a road base layer and the asphalt surface to achieve the purpose of heating and deicing. However, this method also has the following disadvantages: (1) Because the heat source of the method adopts the mode of conveying hot air to the warm air pipe installation layer pre-buried below the road surface through the pipeline after external air is heated, when the method is in actual use, because the temperature of the road in the freezing weather is low, when the hot air is conveyed to the warm air pipe installation layer through the pipeline, the thermal loss is large, the energy utilization efficiency is low, and the operation cost is high; (2) Warm braw pipe installing layer is nearer apart from the ground top layer, damages the back on the road top layer, and warm braw pipe installing layer receives destruction easily, leads to the pipeline damage to reveal.

Disclosure of Invention

The invention provides a concrete pavement structure and a construction method thereof, aiming at solving the problems that in the background technology, the energy utilization efficiency is low, and the warm air pipe installation layer is close to the surface layer of the ground and is easy to damage in a mode of heating and deicing the frozen pavement by adopting the pre-embedded warm air pipe installation layer.

The technical scheme of the invention is as follows: a concrete pavement structure comprises a natural compaction base layer, wherein a heat source layer is laid above the natural compaction base layer, and the heat source layer comprises a plurality of prefabricated heat source plates which are spliced one by one along the left and right directions;

the prefabricated heat source plate is internally provided with an electric heating part, the electric heating part is provided with a plurality of heat source points in the prefabricated heat source plate, and the heat source points are uniformly distributed in the prefabricated heat source plate; the electric heating part is electrically connected with a temperature control system, the temperature control system is positioned on the outer side of a road, and the temperature control system is connected with a municipal power grid point;

a bearing protection layer is laid above the heat source layer and comprises a plurality of prefabricated protection plates which are spliced one by one along the left-right direction, and the prefabricated protection plates are covered and arranged above the splicing seams of two adjacent prefabricated heat source plates so as to enable the splicing seams of the bearing protection layer and the splicing seams of the heat source layer to be staggered left and right;

a plurality of heat conduction pipes which are through up and down are embedded in the prefabricated protection plate, the heat conduction pipes correspond to heat source points formed by the electric heating parts up and down one by one, and heat conduction sealing plates are arranged at the tops of the heat conduction pipes and used for sealing ports at the tops of the heat conduction pipes;

and a pavement surface layer is laid above the bearing protective layer.

Preferably, the splicing position of the adjacent prefabricated heat source plates is provided with an anti-unhooking structure, and the anti-unhooking structure is used for hooking and connecting the adjacent prefabricated heat source plates in the left-right direction so as to prevent the adjacent prefabricated heat source plates from being mutually separated in the left-right direction.

Preferably, the bearing protection layer is provided with two prefabricated protection boards in the front-back direction, one ends of the two prefabricated protection boards close to each other are connected with the second limiting connecting piece, and the second limiting connecting piece is used for preventing the front and back two adjacent prefabricated protection boards from being separated from each other in the front-back direction.

Preferably, a second heat insulation pipe is embedded in the prefabricated heat source plate, an upper port of the second heat insulation pipe is communicated with the outside, a lower port of the second heat insulation pipe vertically corresponds to the heat source point, and an upper port of the second heat insulation pipe vertically corresponds to a lower port of the heat conduction pipe.

Preferably, the electric heating part comprises a plurality of electric heating pipes which are arranged at intervals along the left-right direction, and the electric heating pipes extend along the front-back direction;

a plurality of first heat insulating pipes are embedded in the preheating source plate, extend along the front-back direction, one end of each first heat insulating pipe is inserted into the preheating source plate, and the other end of each first heat insulating pipe is flush with the rear side face of the preheating source plate to form an outer leakage port;

the electric heating pipe is inserted in the first heat insulation pipe, and a sealing plate is arranged at the outer leakage port of the first heat insulation pipe;

the lower extreme and the first heat insulating pipe fixed connection of second heat insulating pipe, and the lower port of second heat insulating pipe and the inside intercommunication of first heat insulating pipe.

Preferably, the first heat-insulating pipe comprises a steel pipe and a heat-insulating layer wrapped outside the steel pipe, and the second heat-insulating pipe has the same structure as the first heat-insulating pipe.

Preferably, a first steel bar framework is pre-embedded in the prefabricated heat source plate, and the first heat insulation pipe and the second heat insulation pipe are both positioned between gaps of the first steel bar framework;

second steel reinforcement frameworks are embedded in the prefabricated protection plate, and the heat conduction pipes are located between the second steel reinforcement frameworks.

Preferably, a plurality of vertically through first positioning holes are formed in the prefabricated heat source plate, second positioning holes which vertically correspond to the first positioning holes one by one are formed in the prefabricated protection plate, positioning drill rods are inserted into the second positioning holes and the first positioning holes, and the lower ends of the positioning drill rods are inserted into the natural compaction base layer.

Preferably, the prefabricated protection plate is provided with a groove pressing grid, the groove pressing grid is a grid-shaped strip-shaped groove with an upper opening and criss-cross, the upper port of the heat conduction pipe is located at the intersection node of the groove pressing grid, and the second positioning hole is located in the grid gap of the groove pressing grid;

the inslot intussuseption of indent net is filled with heat conduction grid slat, and the top at the heat conduction shrouding is established in the pressure of heat conduction grid slat, and the bottom of heat conduction grid slat and the top contact of heat conduction shrouding, the top of heat conduction grid slat and the top surface parallel and level of prefabricated protection shield.

A construction method of a concrete pavement structure comprises the following steps: s1, compacting a natural soil base to form a natural compacted base layer;

s2, arranging the electric heating parts into the pre-heating heat source plates, and then sequentially laying the pre-heating heat source plates on the natural compaction base layer along the left and right directions to form a heat source layer;

s3, covering prefabricated protection plates above the abutted seams of two adjacent prefabricated heat source plates on the heat source layer, adjusting the positions of the prefabricated protection plates to enable heat conduction pipes in the prefabricated protection plates to vertically correspond to heat source points formed by electric heating parts one by one, and then sequentially laying the prefabricated protection plates along the left and right directions to form bearing protection layers;

s4, paving asphalt or concrete on the bearing protective layer to form a pavement surface layer;

s5, electrically connecting the electric heating component with a temperature control system on the outer side of a road, and connecting the temperature control system with a municipal power grid point.

The invention has the advantages that: (1) The bearing protective layer is erected between the heat source layer and the surface layer of the pavement, so that the problem that the heat source layer is easy to damage due to the fact that the heat source layer is close to the surface layer of the ground is solved, the heat source layer is further isolated from external air, an underground environment is formed around the heat source layer, the influence of external temperature difference on the heat source layer is reduced, the energy loss of the heat source is reduced, and the energy utilization efficiency is improved.

(2) The heat conduction pipe arranged in the prefabricated protection plate is used for directly heating and deicing the surface layer of the pavement upwards along the heat conduction pipe, and is used for diffusing a small part of heat to the concrete around the prefabricated protection plate through the pipe wall of the heat conduction pipe, so that the temperature of the prefabricated protection plate is increased, the probability of crack formation caused by expansion caused by heat and contraction caused by too large temperature difference of the prefabricated protection plate 18 is reduced, and the stable structure of the prefabricated protection plate is improved.

(3) The electric heating component is directly arranged in the heat source layer below the road, so that the path length of the heat transmission pipeline is greatly shortened, the on-way thermal loss is reduced, and the energy utilization efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a partial internal structure view in vertical section when used in example 1;

fig. 2 is a schematic view of the internal structure of the prefabricated heat source plate of fig. 1;

FIG. 3 is a schematic top view of the external structure of FIG. 1;

FIG. 4 is a top view of the heat source layer of FIG. 1;

fig. 5 is a schematic view of the internal structure of the prefabricated protection panel in fig. 1;

FIG. 6 is a top view of the external structure of FIG. 5 (without the heat conductive grid strips installed);

FIG. 7 is a schematic top view of the load-bearing protective layer of FIG. 1 (with the addition of the thermally conductive grid strips);

FIG. 8 is a schematic view of a right side view of the first spacing coupler of FIG. 4;

in the figure, 1, a natural compaction base layer, 2, a preheating heat source plate, 3, a first steel reinforcement framework, 4, an upper buckle plate, 5, a lower hook plate, 6, a first heat insulation pipe, 7, an electric heating pipe, 8, a second heat insulation pipe, 9, a filter screen, 10, a first positioning hole, 11, a first dovetail groove, 12, a first limiting connecting piece, 1201, a connecting plate, 1202 and a dovetail wedge strip,

13. the device comprises a lead 14, a branch cable 15, a temperature controller 16, a temperature sensor 17, a municipal cable 18, a prefabricated protective plate 19, a second steel reinforcement framework 20, a heat conduction pipe 21, a heat conduction sealing plate 22, a groove pressing grid 23, a heat conduction grid plate 24, a second dovetail groove 25, a second connecting clamping strip 26, a second positioning hole 27, a positioning drill rod 28 and a pavement surface layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Example 1: a concrete pavement structure is shown in figure 1 and comprises a natural compaction base layer 1, a heat source layer is laid above the natural compaction base layer 1, the heat source layer comprises a plurality of prefabricated heat source plates 2 which are spliced one by one along the left-right direction, and a plurality of first positioning holes 10 which are through up and down are formed in the prefabricated heat source plates 2.

The splicing position of the adjacent prefabricated heat source plates 2 is provided with an anti-unhooking hanging structure which is used for hooking and connecting the adjacent prefabricated heat source plates 2 in the left-right direction so as to prevent the adjacent prefabricated heat source plates 2 from being separated from each other in the left-right direction.

Specifically, as shown in fig. 1 and 2, the unhooking prevention hanging structure comprises an upper buckle plate 4 and a lower buckle plate 5, wherein the upper buckle plate 4 and the lower buckle plate 5 are both of an L-shaped plate structure. The upper buckle plate 4 is fixedly arranged on the left side of the preheating heat source plate 2, the lower buckle plate 5 is fixedly arranged on the right side of the preheating heat source plate 2, and the adjacent upper buckle plate 4 and the lower buckle plate 5 are hooked and connected in the left-right direction.

In order to reduce the self weight of the preheating heat source plates 2 and to improve the speed of transporting and adjusting the positions of the preheating heat source plates 2, as shown in fig. 7, in the present embodiment, two preheating heat source plates 2 are provided in the front-rear direction of the heat source layer, so that the preheating heat source plates 2 correspond to the opposite lanes above the same in the up-down direction when in use.

When the prefabricated heat source plate 2 is installed, in order to enhance the stability of the two prefabricated heat source plates 2 in the front-back direction after installation, the ends, close to each other, of the two prefabricated heat source plates 2 are connected with the first limiting connecting piece 12, and the first limiting connecting piece 12 is used for preventing the front-back adjacent prefabricated heat source plates 2 from being separated from each other in the front-back direction.

Specifically, as shown in fig. 3 and 8, the top of the opposite end of each of two adjacent prefabricated heat source plates 2 is provided with a first dovetail groove 11. Correspondingly, as shown in fig. 8, the first limit connector 12 in this embodiment includes a connecting plate 1201 and two dovetail-shaped wedge strips 1202 fixed at the bottom of the connecting plate 1201 at intervals in the front-back direction, and the dovetail-shaped wedge strips 1202 are inserted into the first dovetail groove 11.

An electric heating part is arranged in the preheating heat source plate 2 and comprises a plurality of electric heating pipes 7 arranged at intervals along the left-right direction, and the electric heating pipes 7 extend along the front-back direction.

In order to reduce the loss of heat energy generated by the electric heating part in the prefabricated heat source plate 2 during heating, as shown in fig. 2, a plurality of first heat insulating pipes 6 are embedded in the prefabricated heat source plate 2, the first heat insulating pipes 6 extend in the front-rear direction, one ends of the first heat insulating pipes 6 are inserted into the prefabricated heat source plate 2, and the other ends of the first heat insulating pipes 6 are flush with the rear side surface of the prefabricated heat source plate 2 to form an outer leakage port.

The electric heating pipe 7 is inserted in the first heat insulating pipe 6, and the inner diameter of the first heat insulating pipe 6 is larger than the outer diameter of the electric heating pipe 7, so as to provide a space for the air heated in the first heat insulating pipe 6 to flow smoothly. The outer leakage port of the first heat insulation pipe 6 is provided with a sealing plate to prevent external rainwater from entering the first heat insulation pipe 6.

A plurality of second heat-insulating pipes 8 are embedded in the preheating heat source plate 2, the lower ends of the second heat-insulating pipes 8 are fixedly connected with the first heat-insulating pipes 6, and the lower end openings of the second heat-insulating pipes 8 are communicated with the inside of the first heat-insulating pipes 6, so that heat generated by the electric heating pipes 7 after being heated in the first heat-insulating pipes 6 can be directly conducted upwards through the second heat-insulating pipes 8. The upper port of the second heat-insulating pipe 8 communicates with the outside so that the upper port of the second heat-insulating pipe 8 forms a heat source point.

The first heat-insulating pipe 6 comprises a steel pipe and a heat-insulating layer wrapped outside the steel pipe, and the second heat-insulating pipe 8 has the same structure as the first heat-insulating pipe 6. The second heat insulating pipe 8 and the steel pipe in the first heat insulating pipe 6 can protect the electric heating pipe 7 and prevent the electric heating pipe 7 from being extruded, and the second heat insulating pipe 8 and the steel pipe in the first heat insulating pipe 6 can also improve the structural strength of the preheating heat source plate 2.

In order to further improve the structural strength of the preheating heat source plate 2, a first steel reinforcement framework 3 is embedded in the preheating heat source plate 2, and the first heat insulation pipe 6 and the second heat insulation pipe 8 are both located between gaps of the first steel reinforcement framework 3.

In order to prevent large-particle impurities from falling into the second heat-insulating pipe 8 and further blocking the heat conduction channel formed by the second heat-insulating pipe 8 during construction, as shown in fig. 2 and 3, a filter screen 9 is fixedly arranged on the top of the second heat-insulating pipe 8 in the present embodiment.

The wires 13 extending from the electric heating tube 7 are connected with branch cables 14 one by one, and the branch cables 14 are provided with temperature control systems which are positioned outside the road. The temperature control system controls the automatic opening and closing of the electric heating tube 7 by monitoring the temperature of the outside air.

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 sensor 15 is in signal connection with the temperature sensor 16.

In order to ensure sufficient and stable electricity consumption, the branch cable 14 is connected with a municipal cable 17 to supply power by using a municipal power grid in the embodiment.

In order to protect the heat source layer and prevent the heat source layer from being damaged easily due to the fact that the heat source layer is close to the ground surface layer, in this embodiment, as shown in fig. 1, a bearing protective layer is laid above the heat source layer, and a road surface layer 28 is laid above the bearing protective layer.

As shown in fig. 1, the bearing protection layer includes a plurality of prefabricated protection plates 18 spliced one by one in the left-right direction, and the prefabricated protection plates 18 are covered and arranged above the joints of two adjacent prefabricated heat source plates 2, so that the joints of the bearing protection layer and the joints of the heat source layer are staggered left and right.

A plurality of heat conduction pipes 20 which are through up and down 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.

In order to avoid the blockage of the heat pipe 20 and the slow heat conduction caused by the asphalt or concrete entering the heat pipe 20 when the pavement surface 28 is paved, in this embodiment, a heat conduction sealing plate 21 is disposed on the top of the heat pipe 20, and the heat conduction sealing plate 21 is used to seal the port on the top of the heat pipe 20.

The heat conductive pipe 20 serves to guide the heat in the second heat-insulating pipe 8 to start in two parts: most of heat directly continues upwards along the heat conduction pipe 20, and a small part of heat begins to be dissipated to the concrete around the interior of the prefabricated protection plate 18 through the pipe wall of the heat conduction pipe 20, so that the temperature of the prefabricated protection plate 18 is increased, the probability of crack formation caused by thermal expansion and cold contraction due to overlarge temperature difference of the prefabricated protection plate 18 is reduced, and the structural stability of the prefabricated protection plate 18 is improved.

The prefabricated protection plate 18 has the functions of further isolating the preheating heat source plate 2 from the outside air, so that an underground environment is formed around the preheating heat source plate 2, the influence of the outside temperature difference on the preheating heat source plate 2 is reduced, the energy loss of a heat source is reduced, and the energy utilization efficiency is improved.

In order to reinforce the structural strength of the prefabricated protection plate 18, as shown in fig. 1 and 5, second steel skeletons 19 are embedded in the prefabricated protection plate 18, and the heat conducting pipes 20 are located between the second steel skeletons 19.

The prefabricated heat source plate 2 and the prefabricated protection plate 18 in the embodiment are both prefabricated by concrete.

In order to improve the stability of the preheating heat source plate 2 and the prefabrication protection plate 18 in use and prevent the preheating heat source plate 2 and the prefabrication protection plate 1 from sliding, as shown in fig. 1, 3 and 4, a plurality of first positioning holes 10 which are through up and down are arranged on the preheating heat source plate 2. Accordingly, as shown in fig. 1 and 6, the prefabricated protection panel 18 is provided with second positioning holes 26 corresponding to the first positioning holes 10 one by one, positioning rods 27 are inserted into the second positioning holes 26 and the first positioning holes 10, and the lower ends of the positioning rods 27 are inserted into the natural compacted base layer 1.

In order to increase the contact area between the heat emitted from the upper port of the heat pipe 20 and the upper road surface 28 and accelerate the heat conduction, as shown in fig. 6, the prefabricated protective plate 18 is provided with a grid 22 of pressing grooves, the grid 22 of pressing grooves is a criss-cross grid-shaped groove with an upper opening, the upper port of the heat pipe 20 is located at the intersection of the grid 22 of pressing grooves, and the second positioning hole 26 is located in the grid gap of the grid 22 of pressing grooves.

As shown in fig. 7, the grooves of the indent grid 22 are filled with heat conducting grid strips 23, the heat conducting grid strips 23 are pressed on the heat conducting sealing plate 21, the bottom of the heat conducting grid strips 23 contacts with the top of the heat conducting sealing plate 21, and the top of the heat conducting grid strips 23 is flush with the top surface of the prefabricated protection plate 18.

When heat is conducted upwards from the upper port of the heat pipe 20, a rapid heat conduction channel of a point (the heat pipe 20) -a net (the heat conduction grid plate 23) -a surface (the pavement surface layer 28) can be formed under the regulation of the heat conduction grid plate 23, so that the temperature of the pavement surface layer 28 is rapidly and uniformly increased to perform deicing.

In order to reduce the dead weight of the prefabricated protection panel 18 and improve the speed of the transportation and position adjustment of the prefabricated protection panel 18, as shown in fig. 7, in the embodiment, two prefabricated protection panels 18 are arranged on the load-bearing protection layer in the front and rear direction to correspond to the opposite lanes above the load-bearing protection layer vertically. When the prefabricated protection plate 18 is installed, in order to enhance the stability of the two prefabricated protection plates 18 in the front-back direction after the prefabricated protection plate is installed, one ends, close to each other, of the two prefabricated protection plates 18 are connected with a second limit connector, and the second limit connector is used for preventing the front-back two adjacent prefabricated protection plates 18 from being separated from each other in the front-back direction.

Specifically, as shown in fig. 6 and 8, the tops of the opposite ends of two prefabricated protection panels 18 adjacent to each other in the front-back direction are respectively provided with a second dovetail groove 24. The second dovetail groove 24 has the same structure as the first dovetail groove 11. Correspondingly, the second spacing coupler in this embodiment is identical in construction to the first spacing coupler 12.

When the pavement surface layer 28 is damaged and needs to be maintained, the prefabricated protection plate 18 isolates the prefabricated heat source plate 2, so that when pavement breaking and re-maintenance construction is carried out by adopting a pavement breaking machine, the electric heating component in the prefabricated heat source plate 2 is not damaged too much.

A construction method of a concrete pavement structure comprises the following steps: s1, compacting the natural soil base to form a natural compacted base layer 1.

S2, the electric heating part is installed in the preheating heat source plate 2, and then the preheating heat source plate 2 is sequentially laid on the natural compaction base layer 1 along the left-right direction to form a heat source layer.

S3, covering the prefabricated protection plates 18 on the heat source layer above the abutted seams of the two adjacent prefabricated heat source plates 2, adjusting the positions of the prefabricated protection plates 18 to enable the heat conduction pipes 20 in the prefabricated protection plates 18 to be in one-to-one up-and-down correspondence with heat source points formed by the electric heating parts, driving 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 sequentially laying the prefabricated protection plates 18 along the left-and-right direction to form a bearing protection layer.

S4, paving asphalt or concrete on the bearing protective layer to form a pavement surface layer 28.

S5, electrically connecting the electric heating component with a temperature control system on the outer side of a road, and connecting the temperature control system with a municipal power grid point.

Example 2: the utility model provides a concrete pavement structure, electric heating element is connected with controller control in this embodiment, and the controller is connected with road monitoring equipment and the control of temperature-detecting equipment of installing in road both sides. The specific operation principle can refer to the related content in the publication with the application number of 2017102398500. The other structure is the same as embodiment 1.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A concrete pavement structure is characterized in that: the natural compacted base layer (1) is paved with a heat source layer, and the heat source layer comprises a plurality of prefabricated heat source plates (2) which are spliced one by one along the left-right direction;

an electric heating part is arranged in the prefabricated heat source plate (2), a plurality of heat source points are formed in the prefabricated heat source plate (2) by the electric heating part, and the heat source points are uniformly distributed in the prefabricated heat source plate (2); the electric heating component is electrically connected with a temperature control system, the temperature control system is positioned on the outer side of a road, and the temperature control system is connected with a municipal power grid point;

a bearing protective layer is laid above the heat source layer and comprises a plurality of prefabricated protective plates (18) which are spliced one by one along the left-right direction, and the prefabricated protective plates (18) are covered above the splicing seams of two adjacent prefabricated heat source plates (2) so that the splicing seams of the bearing protective layer and the splicing seams of the heat source layer are staggered left and right;

a plurality of heat conduction pipes (20) which are through up and down are embedded in the prefabricated protection plate (18), the heat conduction pipes (20) correspond to heat source points formed by the electric heating parts up and down one by one, heat conduction sealing plates (21) are arranged at the tops of the heat conduction pipes (20), and the heat conduction sealing plates (21) are used for sealing ports at the tops of the heat conduction pipes (20);

a pavement surface layer (28) is laid above the bearing protective layer.

2. A concrete pavement structure as set forth in claim 1, wherein: the splicing positions of the adjacent prefabricated heat source plates (2) are provided with anti-unhooking hanging structures which are used for hooking and connecting the adjacent prefabricated heat source plates (2) in the left-right direction so as to prevent the adjacent prefabricated heat source plates (2) from being separated from each other in the left-right direction.

3. A concrete pavement structure as set forth in claim 2, wherein: the bearing protection layer is provided with two prefabricated protection plates (18) in the front-back direction, one ends, close to each other, of the two prefabricated protection plates (18) are connected with a second limiting connecting piece, and the second limiting connecting piece is used for preventing the front and back two adjacent prefabricated protection plates (18) from being separated from each other in the front-back direction.

4. A concrete pavement structure as claimed in any one of claims 1 to 3, wherein: a second heat insulation pipe (8) is embedded in the preheating heat source plate (2), the upper end opening of the second heat insulation pipe (8) is communicated with the outside, the lower end opening of the second heat insulation pipe (8) corresponds to the heat source point up and down, and the upper end opening of the second heat insulation pipe (8) corresponds to the lower end opening of the heat conduction pipe (20) up and down.

5. A concrete pavement structure as set forth in claim 4, wherein: the electric heating part comprises a plurality of electric heating pipes (7) arranged at intervals along the left-right direction, and the electric heating pipes (7) extend along the front-back direction;

a plurality of first heat insulating pipes (6) are embedded in the preheating heat source plate (2), the first heat insulating pipes (6) extend in the front-back direction, one ends of the first heat insulating pipes (6) are inserted into the preheating heat source plate (2), and the other ends of the first heat insulating pipes (6) are flush with the rear side face of the preheating heat source plate (2) to form an outer leakage port;

the electric heating pipe (7) is inserted in the first heat insulating pipe (6), and a sealing plate is arranged at the outer leakage port of the first heat insulating pipe (6);

the lower end of the second heat insulation pipe (8) is fixedly connected with the first heat insulation pipe (6), and the lower port of the second heat insulation pipe (8) is communicated with the inside of the first heat insulation pipe (6).

6. A concrete pavement structure as set forth in claim 5, wherein: the first heat insulation pipe (6) comprises a steel pipe and a heat insulation layer wrapped outside the steel pipe, and the second heat insulation pipe (8) and the first heat insulation pipe (6) are identical in structure.

7. A concrete pavement structure as claimed in claim 6, wherein: a first steel bar framework (3) is pre-embedded in the preheating heat source plate (2), and the first heat insulation pipe (6) and the second heat insulation pipe (8) are both positioned between gaps of the first steel bar framework (3);

second steel reinforcement frameworks (19) are embedded in the prefabricated protection plate (18), and the heat conduction pipes (20) are located between the second steel reinforcement frameworks (19).

8. A concrete pavement structure as claimed in claim 1, 2, 3, 5, 6 or 7, wherein: a plurality of vertically through first positioning holes (10) are formed in the preheating heat source plate (2), second positioning holes (26) which vertically correspond to the first positioning holes (10) one by one are formed in the prefabricated protection plate (18), 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 compaction base layer (1).

9. A concrete pavement structure as set forth in claim 8, wherein: the prefabricated protection plate (18) is provided with a groove pressing grid (22), the groove pressing grid (22) is a criss-cross grid-shaped strip groove with an upper opening, the upper port of the heat conduction pipe (20) is located at the intersection node of the groove pressing grid (22), and the second positioning hole (26) is located in a grid gap of the groove pressing grid (22);

the groove of indent net (22) is filled with heat conduction grid lath (23), and heat conduction grid lath (23) are pressed and are established in the top of heat conduction shrouding (21), and the top contact of the bottom of heat conduction grid lath (23) and heat conduction shrouding (21), the top of heat conduction grid lath (23) and the top surface parallel and level of prefabricated protection shield (18).

10. A method of constructing a concrete pavement structure as claimed in any one of claims 1 to 9, comprising the steps of: s1, compacting the natural soil base to form a natural compacted base layer (1);

s2, arranging the electric heating parts into the preheating heat source plates (2), and then sequentially laying the preheating heat source plates (2) on the natural compaction base layer (1) along the left-right direction to form a heat source layer;

s3, covering prefabricated protection plates (18) on the heat source layer above the abutted seams of two adjacent prefabricated heat source plates (2), adjusting the positions of the prefabricated protection plates (18) to enable heat conduction pipes (20) in the prefabricated protection plates (18) to vertically correspond to heat source points formed by electric heating parts one by one, and then sequentially laying the prefabricated protection plates (18) along the left and right directions to form a bearing protection layer;

s4, paving asphalt or concrete on the bearing protective layer to form a pavement surface layer (28);

s5, electrically connecting the electric heating part with a temperature control system on the outer side of a road, and connecting the temperature control system with a municipal power grid point.

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