CN110485236B - Environment-friendly plastic track and construction process thereof - Google Patents

Abstract

The invention discloses an environment-friendly plastic track and a construction process thereof, and relates to the technical field of plastic tracks, wherein the environment-friendly plastic track comprises a plurality of supporting components which are vertically fixed in an annular foundation pit, a supporting plate and a plastic layer are sequentially fixed above the supporting components, and the plastic layer is connected with the supporting plate in an adhesive manner; the supporting assembly comprises a supporting seat and a lifting platform in threaded connection with the supporting seat, and a supporting platform is fixed on the lifting platform; the plastic layer comprises a plurality of plastic modules which are used for splicing to form the plastic track. The invention has the effects of improving the construction efficiency of the plastic track and environmental protection construction.

Description

Environment-friendly plastic track and construction process thereof

Technical Field

The invention relates to the technical field of plastic runways, in particular to an environment-friendly plastic runway and a construction process thereof.

Background

The plastic track is also named as all-weather track for track and field sports and consists of polyurethane prepolymer, mixed polyether, waste tyre rubber, EPDM rubber grain or PU grain, pigment, assistant and stuffing. The plastic track has the characteristics of good flatness, high compressive strength, proper hardness and elasticity and stable physical performance, and is beneficial to the exertion of the speed and the technology of athletes. The paving process of mixed plastic runway includes three steps, adding rubber grains in the glue solution, paving primer of 8 mm thickness, curing, paving glue solution of 2 mm thickness, spreading red grains, recovering excessive glue grains and spraying one layer of glue solution.

The prior art refers to a Chinese patent with an authorization publication number of CN106522063B, and discloses a construction process of an all-plastic track, which comprises the following construction steps: site cleaning, foundation retest, construction preparation, base material paving, local finishing, surface material spraying, positioning marking and ex-situ delivery; the method comprises the following specific steps of: on the premise of full preparation, the current day and the recent weather trend are known, the water content of the ground is measured to be less than or equal to 10%, and a base material paving procedure is carried out after permission is reported to a supervision engineer; (1) mixing and stirring the base materials; (2) carrying out a small test on a base layer before paving, wherein the area is about 1-2 square meters, and checking whether the bonding degree meets the requirement after 24 hours; (3) performing primary coating treatment; (4) paving a runway base layer, tracking and checking the paved thickness in time in the construction process, controlling the thickness to be 10mm, controlling the flatness to be +/-3 mm, filling and correcting an area which is less than 10mm, determining the advancing speed and distance of the paver every time according to the reaction speed of glue, ensuring smooth edge connection in parallel paving, manually paving corner parts, heating a roller, manually rolling the corner parts during paving, and tracking and sampling the paved thickness to be more than or equal to 10mm by engineering supervision and control personnel and making records, wherein the engineering supervision and correction personnel and the leveling personnel have the flatness to be +/-3 mm; the concrete steps of the surface material spraying are as follows: (1) spraying can be carried out on the surface of the runway base layer after the runway base layer is solidified and formed, and the spraying can be carried out in the next day in general; (2) before the surface layer is sprayed, the base layer is checked, firstly, whether a loose elastic layer exists is checked, a loose area is dug out and then is leveled up again, secondly, the flatness of the base layer is checked, the flatness of straight, curved and semicircular areas is controlled to be +/-3 mm, and the base layer is dug out and leveled up again when the flatness exceeds the range; (3) carrying out surface layer spraying: the spraying is generally finished in 3-4 times, at least 3 times, the spraying direction is opposite each time, the thickness of the finished surface layer is not less than 3mm, and the surface layer spraying operation cannot be carried out when the surface temperature is lower than 8 ℃; (4) manufacturing a plastic finished product test block on site by adopting a parallel sample preparation method, making side station records by a correcting party and a monitoring party, and photographing for future reference; after the plastic sample block is manufactured, the field solidification period is more than 14 days, and the field supervision is enhanced to ensure the representativeness and the authenticity of the plastic sample block. The all-plastic track manufactured by the process has good weather resistance and wear resistance and long service life, but the process has the following defects: the construction period is influenced by external factors such as the environmental temperature, the hardening speed of glue and the like in the construction process.

Disclosure of Invention

The invention aims to provide an environment-friendly plastic track, which can perform standardized modular construction, reduce the influence of site environment factors and improve the construction rate.

The above object of the present invention is achieved by the following technical solutions:

an environment-friendly plastic track comprises a plurality of supporting components vertically fixed in an annular foundation pit, wherein a supporting plate and a plastic layer are sequentially fixed above the supporting components, and the plastic layer is connected with the supporting plate in an adhesive manner; the supporting assembly comprises a supporting seat and a lifting platform in threaded connection with the supporting seat, and a supporting platform is fixed on the lifting platform; the plastic layer comprises a plurality of plastic modules which are used for splicing to form the plastic track.

Through adopting above-mentioned technical scheme, after fixing the foundation ditch with supporting component, can rotate the height that the elevating platform adjusted supporting platform and make it be located same horizontal plane according to the design requirement. Then laying a fixed support plate, and adhering and fixing the prefabricated plastic module by using glue. As the field construction mainly takes the assembly as the main part, the construction operation is convenient, the influence of the field environment is small, and the construction period is shortened.

The invention is further configured to: and a grid net is fixedly arranged between the supporting plate and the plastic layer.

Through adopting above-mentioned technical scheme, the grid net has increased the roughness of backup pad on the one hand, and on the other hand glue covers on the grid net, and after plastic module and glue bonding are fixed as an organic whole, the grid net is equivalent to be connected as an organic whole with the plastic module, improves the firm in connection nature between plastic module and the backup pad.

The invention is further configured to: the grid net comprises a connecting rib which is a rectangular net-shaped frame and gaskets which are fixed at two ends of the connecting rib, and the grid net is detachably connected with the supporting plate.

Through adopting above-mentioned technical scheme, the grid net can be fixed in advance to the backup pad, when later stage inspection discovery roughness is not conform to the design requirement, can dismantle the readjustment position with the grid net. The washer makes it easier for the bolt used to secure the support plate to remain tightened.

The invention is further configured to: the two sides of the opening of the foundation pit are provided with widening grooves, the surfaces of the widening grooves are provided with pre-fixing layers, the bottom of each pre-fixing layer positioned in each widening groove is a hardening layer, and the end portions of the supporting plates are supported on the pre-fixing layers in an abutting mode.

Through adopting above-mentioned technical scheme, the bearing capacity of backup pad tip has been increased on sclerosis layer, and the tip can not subside for a long time along with time when making the backup pad atress simultaneously, is favorable to keeping the whole roughness of backup pad, prevents the later stage because of the backup pad tip sinks and the perk of middle part.

The invention is further configured to: the lateral wall of the pre-fixing layer is provided with a drainage channel which extends to the hardening layer, and the lateral wall of the pre-fixing layer is fixed with a positioning piece with the end surface being parallel to and level with the lateral wall of the pre-fixing layer.

Through adopting above-mentioned technical scheme, the setting element can prevent that the backup pad from inserting water drainage tank when laying the backup pad, improves the backup pad and lays the position accuracy. The hydroenergy on the plastic module can collect the water drainage tank and discharge along the gap, reduces the possibility of plastic module ponding, prolongs the life of plastic module.

The invention is further configured to: one end of the supporting seat, which is far away from the lifting platform, is fixedly provided with a fixed anchor along the axis of the threaded hole, and the fixed anchor is conical and the conical surface is spirally and integrally provided with a convex skirt.

Through adopting above-mentioned technical scheme, the firm of supporting seat is kept in the ground is fixed anchor soon, causes the supporting seat skew when preventing the later stage concreting.

The invention is further configured to: a concrete layer is arranged between the supporting seat and the bottom of the foundation pit, and a convex ring is fixed on the circumferential surface of the supporting seat.

Through adopting above-mentioned technical scheme, concrete layer and supporting seat are fixed the back, and the bulge loop can increase fixed compactness between them, further prevents that the supporting component from receiving heavy load and then down taking place to subside, keeps the firm of supporting component.

The invention is further configured to: the connecting rib and the support plate are connected through a bolt, and the gasket and the support plate are fixed in the hardening layer through a bolt.

Through adopting above-mentioned technical scheme, the connection structure of grid net and backup pad is simple, reduces the field operation degree of difficulty, is favorable to keeping construction quality.

The invention also aims to provide a construction process of the environment-friendly plastic track, which can be used for manufacturing the plastic track by rapid construction.

The above object of the present invention is achieved by the following technical solutions:

a construction process of an environment-friendly plastic track comprises the following steps:

(1) excavating a foundation pit and a widening groove on a foundation by using a mechanical tool according to the design requirements of a drawing, cleaning redundant soil slag, placing a prefabricated drainage groove on the surface of the widening groove, trowelling the drainage groove by using cement mortar, and forming a pre-cured layer after hardening; fixing the positioning piece into the pre-fixing layer through the drainage groove;

(2) inserting a supporting seat of the supporting assembly into a foundation at the bottom of a foundation pit at a designed position by using mechanical rotation according to the design requirements of a drawing, and verifying and calibrating to enable the supporting platform to be kept horizontal; then pouring the concrete which is stirred uniformly in advance to a position required by the process, and waiting for the concrete to be hardened;

(3) rotating and adjusting the lifting platform according to the horizontal height of the hardened layer to enable the supporting platform to move to the same horizontal plane with the hardened layer; or the overall height of the supporting component is adjusted in advance according to the design size of the drawing, and then fine adjustment is carried out on site;

(4) laying a support plate on a support platform, enabling the end part of the support plate to abut against the end part of a positioning piece, fixing the support plate and a hardening layer by using bolts, checking the tightness of all the bolts and screwing the loosened bolts;

(5) the prefabricated plastic module is adhered and fixed on the supporting plate by glue, the top surface is kept parallel and level by pressing the plastic module, and the pressure is removed after the glue is hardened.

The invention is further configured to: after the support plate is laid in the step (4), laying a grid net, and fixing the grid net and the support plate by using bolts; and then fixing the bolts to the hardened layer after penetrating the gaskets and the supporting plates of the grid net by adopting machinery.

By adopting the technical scheme, the plastic track can be constructed in a short time, and the effect of use in the same day of construction can be achieved. Peculiar smell emitted by the plastic raw material can not occur in the construction process, and the construction operation is mainly module assembly and is environment-friendly.

In conclusion, the beneficial technical effects of the invention are as follows:

1. after the foundation pit construction is finished, the supporting component, the supporting plate, the grid net and the plastic module are all assembled, the influence of the field environment is small, the supervision and inspection workload is reduced, and the construction efficiency is improved;

2. only the concrete layer is poured and the mortar is used for manufacturing the pre-fixing layer on site, the wet operation is carried out, the plastic module is a prefabricated part, peculiar smell and other pollution cannot be generated in the construction process, and the environment-friendly effect is achieved;

3. the supporting component, the supporting plate, the grid net and the plastic module can be manufactured in advance in a standardized mode, standardized construction is facilitated, and runway construction quality is convenient to control.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

fig. 2 is a cross-sectional view showing the inner structure of the runway in the direction a-a of fig. 1;

FIG. 3 is a diagram showing a construction state of a foundation pit before a support plate is laid;

FIG. 4 is an enlarged view of a portion B of FIG. 2 showing the structure of a water discharge groove of the support table;

FIG. 5 is a schematic diagram showing structures of layers constituting a runway in a foundation pit;

fig. 6 is an exploded view showing the structure and connection relationship of the supporting plate and the grid mesh.

In the figure, 1, foundation; 11. a foundation pit; 12. widening the groove; 13. reserving a ring cavity; 2. a plastic layer; 21. a plastic module; 22. an adhesive layer; 3. a support assembly; 31. a supporting seat; 311. fixing an anchor; 312. a convex ring; 32. a lifting platform; 321. a support platform; 4. a concrete layer; 5. a crushed stone layer; 6. a support plate; 61. a threaded hole; 62. a through hole; 7. a grid net; 71. connecting ribs; 711. a fixing hole; 72. a gasket; 8. filling blocks; 9. a pre-fixing layer; 91. a positioning member; 92. a water discharge tank; 93. and hardening the layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): the utility model provides an environment-friendly plastic course, as shown in fig. 1 and fig. 2, excavate annular foundation ditch 11 according to the runway design size requirement on ground 1, then widen the open bilateral symmetry of foundation ditch 11 and form widening groove 12, the vertical a plurality of supporting component 3 that are fixed with in foundation ditch 11 bottom, concrete layer 4 and metalling 5 have been laid from bottom to top in proper order in the foundation ditch 11, the one end that supporting component 3 kept away from ground and the diapire that widens groove 12 are on same horizontal plane, the last backup pad 6 that supports of supporting component 3, the tip butt widening groove 12 of backup pad 6 is fixed, it is fixed with grid net 7 and plastic layer 2 to lay in proper order above backup pad 6, the top surface and the ground parallel and level of plastic layer 2, the both sides of plastic layer 2 are fixed with filling block 8.

Referring to fig. 2 and 3, the supporting component 3 includes a supporting seat 31 fixedly connected with the bottom wall of the foundation pit 11 and a lifting platform 32 installed on the supporting seat 31, one end of the supporting seat 31 is provided with a threaded hole, the lifting platform 32 includes a connecting column in threaded connection with the threaded hole of the supporting seat 31, one end of the connecting column far away from the threaded hole is fixed with a supporting platform 321, and the supporting platform 321 is perpendicular to the axis of the connecting column. By rotating the lifting table 32, the connecting column of the lifting table 32 is screwed in or out of the threaded hole, so that the overall supporting height of the supporting component 3 can be adjusted. The support component 3 can be made of high-strength alloy, such as alloy steel, and has high hardness and strength and is not easy to deform.

In order to fix the supporting seat 31 and the bottom wall of the foundation pit 11 firmly, a fixing anchor 311 is fixed at one end of the supporting seat 31, which is far away from the threaded hole, along the axis of the threaded hole, and the fixing anchor 311 is inserted into the foundation 1 below the foundation pit 11. In order to prevent the anchor 311 from shaking after being inserted into the supporting seat 31, the anchor 311 may be designed in a conical shape and a protruding skirt is integrally formed on the conical surface in a spiral manner.

Referring to fig. 2 and 3, the concrete layer 4 may be formed by casting and hardening C30 concrete, and the thickness of the concrete layer 4 is not greater than the vertical distance from the top end of the support seat 31 to the bottom wall of the foundation pit 11, and generally is equal to the height 1/2-2/3 of the support seat 31, so as to prevent the concrete from flowing into the threaded hole of the support seat 31 to cause blockage, thereby affecting the adjustment of the lifting platform 32.

A reserved annular cavity 13 is formed between the bottom end of the supporting seat 31 and the bottom wall of the foundation pit 11 at a certain distance, the height of the reserved annular cavity 13 is generally 30-50cm, and is 40cm, and the height of the reserved annular cavity 13 can be adjusted according to actual construction requirements. The concrete is filled into the reserved annular cavity 13 for curing after pouring, so that the supporting seat 31 is supported on the concrete layer 4 with higher hardness when the supporting component 3 is stressed, and the possibility of settlement caused by direct pressure application on the foundation 1 by the stressed supporting seat 31 is reduced.

The circumferential surface of the support seat 31 is fixed with a convex ring 312, the convex ring 312 at least surrounds one circle, and the convex ring 312 can be a complete circular ring or can be formed by a plurality of arc-shaped bulges at intervals. After concrete layer 4 is fixed with supporting seat 31, bulge loop 312 can increase fixed compactness between them, further prevents that supporting component 3 from receiving downwards the emergence after heavily pressing and subsiding, keeps supporting component 3's firm.

In addition, the one end of supporting seat 31 is inserted in ground 1 and is fixed, and during concrete placement, a plurality of supporting seats 31 still play the strengthening rib anchor effect for be connected between concrete layer 4 and the ground 1 and become a whole, improve concrete layer 4's steadiness.

Referring to fig. 3 and 4, the end of the supporting plate 6 may be fixed to the foundation 1 at the bottom of the widening groove 12 by bolts, in order to reduce the influence of the settlement of the foundation 1, a cement mortar may be poured on the surface of the widening groove 12 to form a pre-cured layer 9, and a plurality of steel nails or steel wire meshes may be connected between the cement mortar and the foundation 1 to improve the connection strength between the cement mortar and the foundation 1. The vertical side wall of the pre-fixing layer 9 is reserved with a drainage groove 92, the vertical side wall of the pre-fixing layer 9 is fixed with a plurality of positioning pieces 91, and the end parts of the positioning pieces 91 are flush with the vertical side wall of the pre-fixing layer 9, so that the end parts abut against the positioning pieces 91 to prevent dislocation when the supporting plate 6 is placed. The pre-fixing layer 9 is positioned on the bottom wall part of the widening groove 12 to form a hardening layer 93, and the drainage groove 92 is positioned at the joint of the vertical side wall of the pre-fixing layer 9 and the hardening layer 93, so that the flow section is increased, and the flow section can be a semicircular groove. The drainage channel 92 may be a preform.

Referring to fig. 5 and 6, the supporting plate 6 may be a prefabricated rectangular steel plate for splicing at a straight position of the runway or a fan-shaped steel plate for splicing at a curved position of the runway. In order to reduce the deformation of the supporting plate 6, for example, a plastic track with a width of 10m, the supporting plate 6 may have a profile size of 5.15m × 4m or 5.15m × 2m, and the two supporting plates 6 are spliced together to form a length of 10.30m, so that the filling block 8 is also supported and placed above the supporting plate 6 to limit the lateral movement of the plastic layer 2. The center distance between two adjacent supporting components 3 is generally not more than 80cm, 60cm can be selected here, the specification of the supporting platform 321 of the supporting components 3 can be phi 20cm multiplied by 3cm, and a plurality of supporting components 3 can be uniformly distributed in the foundation pit 11 in an array mode, so that the stress between the supporting plate 6 and the supporting components 3 is uniform, and deformation caused by concentrated local stress in the later use process is avoided.

When the supporting plate 6 is installed, one end of the supporting plate, which is used for abutting against the widening groove 12, is provided with a threaded hole 61 and a through hole 62, and the threaded hole 61 and the through hole 62 can be formed by pre-processing, so that the supporting plate is convenient to install and directly use on site. At least two, here 4, through holes 62 are provided in each support plate 6, so that bolts can be passed through the through holes 62 to fix the support plate 6 to the hardened layer 93.

The grill net 7 can increase the surface roughness of the support plate 6. The grid net 7 comprises a plurality of connecting ribs 71 which are transversely and longitudinally arranged, the connecting ribs 71 form a rectangular net-shaped framework integrally, four corners of each connecting rib 71 are respectively fixed with a disc, fixing holes 711 are formed in the discs, and the two fixing holes 711 at the same end of each connecting rib 71 correspond to the two threaded holes 61 in the support plate 6, so that the connecting ribs 71 are fixed on the support plate 6 through bolts; the end part of the connecting rib 71 is fixedly connected with a gasket 72, the gasket 72 can be made of a spring sheet or a rubber sheet, a through hole is reserved on the gasket 72 and corresponds to the through hole 62 on the supporting plate 6, a bolt can conveniently penetrate through the gasket 72 during installation, and operation is convenient. If necessary, when the support plate 6 is made of an anti-slip steel plate, the grid net 7 can be omitted.

Referring to fig. 5 and 6, the plastic layer 2 can be formed by splicing a plurality of prefabricated plastic modules 21, the plastic modules 21 are divided into two types, one type is a rectangular block used for laying a runway to the position, the other type is a fan-shaped block used for laying a runway curve position, and in order to facilitate operation and reduce the difficulty of lifting and mounting, each plastic module 21 can also be divided into two blocks along the vertical plane of the central line of the runway design. The plastic module 21 can prefab, is about to make in advance through the mould in the workshop according to laying the layer number design for the raw materials of traditional plastic course, and plastic module 21 can be the layer is mixed to permeable waterproof priming paint layer, rubber particle bottom, PU face glue and EPDM granule according to the number of piles in proper order, also can be other structural layers as required. Then cutting the plastic into single plastic modules 21 according to the required size, and treating the plastic modules before leaving the factory to eliminate the irritant odor emitted by formaldehyde or other raw materials. Therefore, the plastic module 21 can not cause gas pollution when being installed on site, and the phenomenon that the body of a student is uncomfortable and even poisoned due to pungent smell emitted by a runway is avoided.

Referring to fig. 2, the plastic layer 2 may be fixed to the supporting plate 6 by an adhesive layer 22, and the adhesive layer 22 may be formed by solidifying and hardening a liquid or paste adhesive, such as a single-component polyurethane adhesive or other glue, such as 502 glue. When the grating net is used, the adhesive is paved on the connecting ribs 71 of the grating net 7, then the plastic modules 21 are assembled and pressed, and the top surfaces of the plastic modules 21 are kept on the same plane.

The construction process of the environment-friendly plastic track comprises the following steps:

(1) excavating a foundation pit 11 and a widening groove 12 on a foundation 1 by using a mechanical tool according to the design requirements of a drawing, cleaning redundant soil slag, fixing steel nails or steel wire meshes on the surfaces of the widening groove 12, leveling by using cement mortar, placing a prefabricated drainage groove 92, and forming a pre-fixing layer 9 after hardening; a steel nail is fixed as a positioning piece 91 through the drainage channel 92 into the pre-consolidated layer 9.

(2) Inserting the supporting seat 31 of the supporting component 3 into the foundation 1 at the bottom of the foundation pit 11 at the designed position by using mechanical rotation according to the design requirements of a drawing, verifying and calibrating to ensure that the supporting platform 321 is kept horizontal, and cleaning soil slag brought out by the rotation of the fixed anchor 311; then, concrete which is stirred uniformly in advance is poured to the 1/2 height position of the supporting seat 31, and after the concrete is hardened, broken stones are laid in the gaps among the supporting assemblies 3.

(3) Rotationally adjusting the elevation table 32 according to the horizontal height of the hardened layer 93 so that the support platform 321 moves to be at the same level as the hardened layer 93; the overall height of the supporting component 3 can be adjusted in advance according to the design size of the drawing, and then fine adjustment is carried out on site.

(4) Laying the support plate 6 on the support platform 321, enabling the end part of the support plate 6 to abut against the end part of the positioning piece 91, then laying the grille net 7, enabling the fixing hole 711 of the grille net 7 to be aligned with the threaded hole 61 on the support plate 6, and then fixing the grille net 7 and the support plate 6 by using a bolt; then, fixing the bolt to the hardening layer 93 by a machine after passing the bolt through the through hole of the spacer 72 and the through hole 62 of the support plate 6; the bolt used for fixing the support plate 6 can be designed to be an embedded bolt according to the drawing, and the through hole 62 is a strip-shaped hole. Checking and calibrating the levelness of the grid net 7 to be controlled within the design requirement range, and finally checking the tightness of all bolts and screwing the loosened bolts.

(5) The packing piece 8 of the quadrangular prism form is fixedly placed on the side wall of the laminating pre-fixing layer 9 above the gasket 72, then glue is evenly spread to the connecting rib 71 area of the grid net 7, two plastic modules 21 corresponding to the splicing of one grid net 7 can be spread at every time, the plastic modules 21 are pressed by the heavy pressing block to enable the top surface to be kept level, and the heavy pressing block is removed after the glue is hardened.

And carrying out final verification and delivery after construction is finished. Compared with the traditional paving process, the process can finish the construction of the plastic runway in a short time, and can achieve the effect of use in the same day of construction. Peculiar smell emitted by the plastic raw material can not occur in the construction process, and the construction operation is mainly module assembly and is environment-friendly. During delivery, the plastic sample block does not need to be manufactured for waiting for 14 days, and only the factory inspection certificate and the detection report of the plastic module 21 need to be issued.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by the embodiments, therefore: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (8)

1. An environment-friendly plastic course which is characterized in that: the device comprises a plurality of supporting components (3) which are vertically fixed in an annular foundation pit (11), wherein a supporting plate (6) and a plastic layer (2) are sequentially fixed above the supporting components (3), and the plastic layer (2) is connected with the supporting plate (6) in an adhesive manner; the supporting assembly (3) comprises a supporting seat (31) and a lifting platform (32) in threaded connection with the supporting seat (31), and a supporting platform (321) is fixed on the lifting platform (32); the plastic layer (2) comprises a plurality of plastic modules (21) which are spliced to form a plastic track; one end of the supporting seat (31) far away from the lifting platform (32) is fixedly provided with a fixed anchor (311) along the axis of the threaded hole (61), the fixed anchor (311) is conical, and the conical surface is spirally and integrally provided with a convex skirt; a concrete layer (4) is arranged between the supporting seat (31) and the bottom of the foundation pit (11), and a convex ring (312) is fixed on the circumferential surface of the supporting seat (31).

2. An environmentally friendly plastic race track as defined in claim 1, wherein: a grid net (7) is fixedly arranged between the supporting plate (6) and the plastic layer (2).

3. An environmentally friendly plastic race track as defined in claim 2, wherein: the grid net (7) comprises connecting ribs (71) which are rectangular net-shaped frames and gaskets (72) which are fixed at two ends of the connecting ribs (71), and the grid net (7) is detachably connected with the supporting plate (6).

4. An environmentally friendly plastic race track as defined in claim 3, wherein: the two sides of the opening of the foundation pit (11) are provided with widening grooves (12), the surfaces of the widening grooves (12) are provided with pre-fixing layers (9), the bottoms of the pre-fixing layers (9) located in the widening grooves (12) are hardened layers (93), and the end portions of the supporting plates (6) are supported on the pre-fixing layers (9) in an abutting mode.

5. An environmentally friendly plastic course as defined in claim 4, wherein: the side wall of the pre-fixing layer (9) is provided with a drainage groove (92), the drainage groove (92) extends to the hardening layer (93), and a positioning piece (91) with an end face flush with the side wall of the pre-fixing layer (9) is fixed on the side wall of the pre-fixing layer (9).

6. An environmentally friendly plastic course as defined in claim 5, wherein: the connecting rib (71) is connected with the support plate (6) through a bolt, and the gasket (72) and the support plate (6) are fixed into the hardening layer (93) through a bolt.

7. The construction process of the environment-friendly plastic track is characterized by comprising the following steps: the method comprises the following steps:

(1) excavating a foundation pit (11) and a widening groove (12) on a foundation (1) by using a mechanical tool according to the design requirements of a drawing, cleaning redundant soil residues, placing a prefabricated drainage groove (92) on the surface of the widening groove (12), trowelling the drainage groove with cement mortar, and forming a pre-fixed layer (9) after hardening; fixing the positioning piece (91) into the pre-fixing layer (9) through the drainage groove (92);

(2) inserting a supporting seat (31) of a supporting assembly (3) into a foundation (1) at the bottom of a foundation pit (11) at a designed position by using mechanical rotation according to the design requirements of a drawing, and verifying and calibrating to enable a supporting platform (321) to be kept horizontal; then pouring the concrete which is stirred uniformly in advance to a position required by the process, and waiting for the concrete to be hardened;

(3) rotationally adjusting the lifting table (32) according to the horizontal height of the hardening layer (93) to enable the supporting platform (321) to move to be on the same horizontal plane with the hardening layer (93); or the overall height of the supporting component (3) is adjusted in advance according to the design size of the drawing, and then fine adjustment is carried out on site;

(4) laying a support plate (6) on a support platform (321), enabling the end part of the support plate (6) to abut against the end part of a positioning piece (91), fixing the support plate (6) and a hardening layer (93) by using bolts, checking the tightness of all the bolts and screwing the loosened bolts;

(5) and (3) adhering and fixing the prefabricated plastic module (21) on the support plate (6) by using glue, pressing the plastic module (21) to enable the top surface to be kept level, and removing the pressure after the glue is hardened.

8. The construction process of the environment-friendly plastic track according to claim 7, characterized in that: after the support plate (6) is laid in the step (4), laying a grid net (7), and fixing the grid net (7) and the support plate (6) by using bolts; and then, bolts are mechanically fixed to the hardening layer (93) after penetrating through the gaskets (72) of the grid net (7) and the supporting plate (6).

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