Spliced pavement structure for expansion and reconstruction of expressway project

Abstract

The utility model discloses a spliced pavement structure of a dilatation reconstruction expressway project, which comprises an old road structure layer, a gravel roadbed, a new roadbed, a drainage component, a drainage layer, a stress dispersion layer, a bearing layer and a wearing layer, old road widening steps are arranged on the old road structure layer, the drainage component is arranged on the old road steps, and the new roadbed is arranged on the old road widening steps. The gravel roadbed is laid at the side end of the old road structure layer, a new roadbed is laid on the gravel roadbed, and a drainage layer is laid on the new roadbed; a new pavement structure and an old pavement structure are lapped in a mode of excavating steps on an old road, an L-shaped gravel drainage structure easy to splice and mount is additionally arranged at the positions of the steps, and a gravel roadbed is adopted as a newly spliced wide roadbed, so that water in the old road is gradually discharged into the gravel roadbed through the L-shaped gravel drainage structure; and the water is discharged into a side drainage facility in a scattered manner, so that the water in the old road pavement structure is effectively removed, and the damage of the old road pavement structure is prevented from being aggravated.

Description

Technical Field

[0001] The utility model relates to the technical field of road engineering, in particular to a spliced ​​pavement structure for a highway expansion and reconstruction project. Background Art

[0002] The Chinese patent document with the current notification number CN218842752U discloses a roadbed and pavement splicing structure of a roadbed project, comprising: an old roadbed, one side of the old roadbed is evenly provided with steps, and the top of the old roadbed is paved with the old pavement; a new roadbed, one side of the new roadbed is matched and connected with the steps, an auxiliary connecting piece is arranged between the new roadbed and the old roadbed, one end of the auxiliary connecting piece is fixedly assembled on the top of the step, and the other end of the auxiliary connecting piece is fixedly embedded in the new roadbed, and the top of the new roadbed is paved with a new pavement corresponding to the old pavement; in the roadbed and pavement splicing structure of the roadbed project in the utility model, the new and old steps are connected by the step structure, which can effectively resist the strain localization phenomenon along the joint position and improve the stability of the roadbed; the new and old roadbeds are connected by the auxiliary connecting piece to strengthen the connection, which can improve the transverse connection strength between the new and old roadbeds, avoid the generation of longitudinal cracks, and ensure the service life of the spliced ​​pavement.

[0003] However, in the above scheme and the prior art, the original expressway is in urgent need of expansion and reconstruction. After a certain number of years of vehicle load and environmental factors, the original road surface has more or less cracks, potholes, ruts and other defects. Rainwater enters the pavement structure layer through the defect location. Before the expansion and reconstruction, the moisture can be discharged to the slope through the interlayer. After the expansion and reconstruction, due to the increase in the width of the newly widened pavement structure, the new pavement structure blocks the drainage channel of the moisture inside the old road. In particular, when the new pavement structure does not correspond to the existing pavement structure layer, the moisture in the old road cannot be discharged, aggravating the damage to the pavement structure of the old road.

[0004] To this end, the utility model proposes a spliced ​​pavement structure for expanding and reconstructing a highway project to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a spliced ​​pavement structure for expanding and reconstructing a highway project, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spliced ​​pavement structure for a highway expansion and reconstruction project comprises an old road structure layer, a gravel roadbed, a new roadbed, a drainage component, a drainage layer, a stress dispersion layer, a load-bearing layer and a wear layer, an old road widening step is arranged on the old road structure layer, a drainage component is arranged on the old road step, a gravel roadbed is laid on the side end of the old road structure layer, a new roadbed is laid on the gravel roadbed, and a drainage layer is laid on the new roadbed.

[0007] Preferably, the new roadbed consists of a subbase, a lower base and an upper base laid from bottom to top.

[0008] Preferably, the drainage component comprises an L-shaped gravel drainage structure, a first protrusion, a first groove, a second protrusion, a second groove, a positioning groove, a clamping groove, a positioning plug-in block and a clamping block; the L-shaped gravel drainage structure is placed on the old road widening step of the old road structure layer, the side end of the horizontal plate of the L-shaped gravel drainage structure is fixedly provided with a first protrusion, and the upper end of the vertical plate of the L-shaped gravel drainage structure is provided with a first groove; one side of the horizontal plate of the L-shaped gravel drainage structure is fixedly provided with a second protrusion, and the other side is provided with a second groove; positioning grooves are symmetrically provided on both side walls of the vertical plate of the L-shaped gravel drainage structure, the positioning grooves are arranged obliquely downward, and a clamping groove is provided at the bottom of the positioning groove; clamping blocks are symmetrically fixedly provided at both ends of the positioning plug-in block.

[0009] Preferably, the L-shaped gravel drainage structure is prefabricated in advance using a trial mold, and the vertical width of the L-shaped gravel drainage structure is the same as its horizontal thickness.

[0010] Preferably, the L-shaped gravel drainage structure is arranged in multiple layers, and the first protrusion of the L-shaped gravel drainage structure of the upper layer corresponds to the first groove of the L-shaped gravel drainage structure of the lower layer, is arranged in the same group and is clipped; the L-shaped gravel drainage structure is arranged in adjacent clipping, and the second groove of the left L-shaped gravel drainage structure corresponds to the second protrusion of the right L-shaped gravel drainage structure, is arranged in the same group and is clipped.

[0011] Preferably, the positioning block corresponds to the setting position of the card slot, and the positioning block is simultaneously inserted into the positioning slots on the two adjacent L-shaped gravel drainage structures on the left and right; the card block and the card slot have corresponding setting positions and the same number of setting groups, and the card block and the card slot are inserted.

[0012] Preferably, an in-situ hot regeneration layer is set on the upper layer of the old road structure layer by using in-situ hot regeneration technology, and a stress dispersion layer is set on the upper end of the drainage layer by using factory-mixed hot regeneration technology; the load-bearing layer is laid on the in-situ hot regeneration layer and the stress dispersion layer, and a wear layer is laid on the load-bearing layer.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The new and old pavement structures are overlapped by excavating steps on the old road, and an L-shaped gravel drainage structure that is easy to splice and install is added at the step position. The new widened roadbed uses a gravel roadbed, so that the moisture inside the old road can be gradually discharged into the gravel roadbed through the L-shaped gravel drainage structure, and then discharged into the edge drainage facilities in a scattered manner, effectively removing the moisture inside the old road pavement structure and avoiding aggravating the damage to the old road pavement structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the erection of the L-shaped gravel drainage structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structural connection of the L-shaped gravel drainage structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the connection of the positioning plug structure of the utility model.

[0019] In the figure: old road structure layer 1, in-situ hot regeneration layer 2, gravel roadbed 3, new roadbed 4, subbase layer 41, lower base layer 42, upper base layer 43, drainage assembly 5, L-shaped gravel drainage structure 51, first protrusion 52, first groove 53, second protrusion 54, second groove 55, positioning groove 56, card slot 57, positioning plug 58, card block 59, drainage layer 6, stress dispersion layer 7, load-bearing layer 8, wear layer 9. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model are described clearly and completely below. The embodiments of the utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 4The utility model provides a technical solution: a spliced ​​pavement structure of a highway expansion and reconstruction project includes an old road structure layer 1, a gravel roadbed 3, a new roadbed 4, a drainage component 5, a drainage layer 6, a stress dispersion layer 7, a load-bearing layer 8 and a wear layer 9. An old road widening step is arranged on the old road structure layer 1, and a drainage component 5 is arranged on the old road step. The gravel roadbed 3 is laid on the side end of the old road structure layer 1, and a new roadbed 4 is laid on the gravel roadbed 3. The new roadbed 4 is composed of a subbase 41, a lower base 42, and an upper base 43 laid from bottom to top, and a drainage layer 6 is laid on the new roadbed 4; the upper layer of the old road structure layer 1 is provided with an in-situ hot regeneration layer 2 through an in-situ hot regeneration technology to improve the bearing capacity of the original road surface, and the upper end of the drainage layer 6 is regenerated through a factory-mixed hot regeneration technology. The stress dispersion layer 7 is set by the technology, which makes full use of the residual performance of the milling material of the road surface renovation and expansion, so as to achieve the effect of being green and environmentally friendly and improving the high temperature performance and bearing capacity of the road surface structure; the load-bearing layer 8 is laid on the in-situ hot regeneration layer 2 and the stress dispersion layer 7, and the wear layer 9 is laid on the load-bearing layer 8; the drainage component 5 includes an L-shaped gravel drainage structure 51, a first protrusion 52, a first groove 53, a second protrusion 54, a second groove 55, a positioning groove 56, a card groove 57, a positioning plug 58 and a card block 59; the L-shaped gravel drainage structure 51 is placed on the old road widening step of the old road structure layer 1, and the L-shaped gravel drainage structure 51 is prefabricated in advance using a trial mold, and the vertical width of the L-shaped gravel drainage structure 51 is the same as the horizontal thickness; the L-shaped gravel A first protrusion 52 is fixedly provided at the side end of the horizontal plate of the drainage structure 51, and the first protrusion 52 is arranged in an isosceles trapezoid. A first groove 53 is provided at the upper end of the vertical plate of the L-shaped gravel drainage structure 51; the L-shaped gravel drainage structure 51 is arranged in multiple layers, and the first protrusion 52 of the upper layer of the L-shaped gravel drainage structure 51 corresponds to the first groove 53 of the lower layer of the L-shaped gravel drainage structure 51 in the same position, and the same number of groups are arranged and clamped, so that the upper and lower layers of the L-shaped gravel drainage structure 51 are stably installed; a second protrusion 54 is fixedly provided on one side of the horizontal plate of the L-shaped gravel drainage structure 51, and the second protrusion 54 is arranged in an isosceles trapezoid, and a second groove 55 is provided on the other side; the L-shaped gravel drainage structure 51 is arranged in adjacent clamping, and the left side of the L-shaped gravel drainage structure 51 is clamped. The second groove 55 of the water structure 51 corresponds to the second protrusion 54 of the right L-shaped gravel drainage structure 51 in the same position, and the same number of groups are provided and connected, so that the adjacent L-shaped gravel drainage structures 51 are stably arranged; positioning grooves 56 are symmetrically provided on the two side walls of the vertical plate of the L-shaped gravel drainage structure 51, and the positioning grooves 56 are arranged to be inclined downward, and a clamping groove 57 is provided at the bottom of the positioning groove 56 to prevent the positioning plug 58 from falling off easily; clamping blocks 59 are symmetrically fixedly provided at both ends of the positioning plug 58; the positioning plug 58 corresponds to the position of the clamping groove 57, and the positioning plug 58 is simultaneously inserted into the positioning grooves 56 on the two adjacent L-shaped gravel drainage structures 51 on the left and right, ensuring that the adjacent L-shaped gravel drainage structures 51 are laid at the same horizontal position;The block 59 and the slot 57 are arranged at corresponding positions and have the same number of groups. The block 59 and the slot 57 are plugged in to ensure that the adjacent L-shaped gravel drainage structures 51 are tightly connected.

[0022] When the utility model is used, an old road widening step is excavated on the old road structure layer 1, and a gravel roadbed 3 for a new road is laid. The L-shaped gravel drainage structure 51 is sequentially erected on the widening step. During the process, the second groove 55 of the left L-shaped gravel drainage structure 51 is engaged with the second protrusion 54 of the right L-shaped gravel drainage structure 51, so that the side walls of the adjacent L-shaped gravel drainage structures 51 are engaged, until the positions of the positioning grooves 56 on the adjacent L-shaped gravel drainage structures 51 correspond to each other. At this time, the positioning plug 58 is inserted into the positioning groove 56, and the clamping block 59 and the clamping groove 57 are engaged. The adjacent L-shaped gravel drainage structures 51 are connected by snapping to avoid separation, and then the upper layer of L-shaped gravel drainage structure 51 is laid, so that the first protrusion 52 of the upper layer of L-shaped gravel drainage structure 51 is snapped with the first groove 53 of the lower layer of L-shaped gravel drainage structure 51, so that the multi-layer L-shaped gravel drainage structure 51 is stably arranged, which is convenient for the drainage of water inside the old road; after the L-shaped gravel drainage structure 51 is laid, the new roadbed 4 is laid, and then the drainage layer 6 is laid, and then the in-situ heat regeneration layer 2 and the stress dispersion layer 7 are laid, and the load-bearing layer 8 and the wear layer 9 are added as a whole.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spliced ​​pavement structure for a highway expansion and reconstruction project, characterized in that: The invention comprises an old road structure layer (1), a gravel roadbed (3), a new roadbed (4), a drainage component (5), a drainage layer (6), a stress dispersion layer (7), a load-bearing layer (8) and a wear layer (9); an old road widening step is arranged on the old road structure layer (1); a drainage component (5) is arranged on the old road step; the gravel roadbed (3) is laid on the side end of the old road structure layer (1); a new roadbed (4) is laid on the gravel roadbed (3); and a drainage layer (6) is laid on the new roadbed (4).

2. The spliced ​​pavement structure for highway expansion and reconstruction according to claim 1 is characterized by: The new roadbed (4) is composed of a subbase (41), a lower base (42), and an upper base (43) which are laid from bottom to top.

3. The spliced ​​pavement structure for highway expansion and reconstruction according to claim 1 is characterized by: The drainage assembly (5) comprises an L-shaped gravel drainage structure (51), a first protrusion (52), a first groove (53), a second protrusion (54), a second groove (55), a positioning groove (56), a clamping groove (57), a positioning plug (58) and a clamping block (59); the L-shaped gravel drainage structure (51) is placed on the old road widening step of the old road structure layer (1); the side end of the horizontal plate of the L-shaped gravel drainage structure (51) is fixedly provided with the first protrusion (52); the L-shaped gravel drainage structure (51) is fixedly provided with the first protrusion (52); A first groove (53) is provided on the upper end of the vertical plate of the L-shaped gravel drainage structure (51); a second protrusion (54) is fixedly provided on one side of the horizontal plate of the L-shaped gravel drainage structure (51), and a second groove (55) is provided on the other side; positioning grooves (56) are symmetrically provided on both side walls of the vertical plate of the L-shaped gravel drainage structure (51), the positioning grooves (56) are arranged to be inclined downward, and a clamping groove (57) is provided at the bottom end of the positioning groove (56); and clamping blocks (59) are symmetrically fixedly provided at both ends of the positioning plug block (58).

4. The spliced ​​pavement structure for highway expansion and reconstruction according to claim 3 is characterized by: The L-shaped gravel drainage structure (51) is prefabricated in advance using a trial mold, and the vertical width of the L-shaped gravel drainage structure (51) is the same as its horizontal thickness.

5. The spliced ​​pavement structure for highway expansion and reconstruction according to claim 3 is characterized by: The L-shaped gravel drainage structure (51) is arranged in a multi-layer arrangement, the first protrusion (52) of the upper layer of the L-shaped gravel drainage structure (51) and the first groove (53) of the lower layer of the L-shaped gravel drainage structure (51) are arranged in a corresponding position, are arranged in the same number of groups, and are clamped; the L-shaped gravel drainage structure (51) is arranged in an adjacent clamping arrangement, the second groove (55) of the left L-shaped gravel drainage structure (51) and the second protrusion (54) of the right L-shaped gravel drainage structure (51) are arranged in a corresponding position, are arranged in the same number of groups, and are clamped.

6. The spliced ​​pavement structure for highway expansion and reconstruction according to claim 3 is characterized by: The positioning plug-in block (58) and the card slot (57) are arranged at corresponding positions, and the positioning plug-in block (58) is simultaneously inserted into the positioning slots (56) on the two adjacent L-shaped gravel drainage structures (51) on the left and right; the card block (59) and the card slot (57) are arranged at corresponding positions and have the same number of sets, and the card block (59) and the card slot (57) are inserted.

7. The spliced ​​pavement structure for highway expansion and reconstruction according to claim 1 is characterized by: The upper layer of the old road structure layer (1) is provided with an in-situ heat regeneration layer (2) by means of in-situ heat regeneration technology, and the upper end of the drainage layer (6) is provided with a stress dispersion layer (7) by means of factory-mixed heat regeneration technology; the load-bearing layer (8) is laid on the in-situ heat regeneration layer (2) and the stress dispersion layer (7), and a wear layer (9) is laid on the load-bearing layer (8).

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