CN214423049U

CN214423049U - New and old pavement layer linking structure

Info

Publication number: CN214423049U
Application number: CN202023334966.9U
Authority: CN
Inventors: 邹剑波; 文祺琦; 陈文�; 蒋亮
Original assignee: Chongqing Leway Civil Engineering Design Co ltd
Current assignee: Chongqing Leway Civil Engineering Design Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-10-19
Anticipated expiration: 2030-12-30

Abstract

The utility model relates to a new and old road surface layer links up structure belongs to the road structure field, and it is including setting up the soil filling layer between old way and new way, the new way cladding is on old way, and the new way includes new road surface layer and sets up the new road side slope in new road surface layer both sides, is equipped with the rubble bed course between soil filling layer and the new road surface layer. The supporting force that new road surface layer received owing to being located old and new road bed junction is different, and the easy local problem of breaking has the effect that can reduce the broken possibility of new road surface layer in old and new road bed's junction.

Description

New and old pavement layer linking structure

Technical Field

The application relates to the field of road structures, in particular to a new and old pavement layer connection structure.

Background

As urbanization progresses, the width of many old roads is difficult to satisfy, and therefore, widening of the old roads is required.

The utility model discloses a utility model patent that the publication number of granting is CN209227316U discloses a new and old road surface layer mosaic structure of reconstruction and extension engineering, including the ground, be equipped with old roadbed and new roadbed on the ground, the lateral wall of new roadbed offsets with the lateral wall of old roadbed, is connected through a plurality of coupling mechanism between old roadbed and the new roadbed.

In view of the above-mentioned related technologies, the inventor thinks that, because the soil of the old roadbed is compacted more by long-term extrusion, and the new roadbed is buried by new soil, the loose degree of the new roadbed and the old roadbed is different, the new roadbed is easy to deposit downwards, so that the supporting force applied to the joint of the new roadbed and the old roadbed at the new roadbed is different, and the new roadbed is easy to break locally.

SUMMERY OF THE UTILITY MODEL

In order to reduce the possibility that the new road surface layer is broken at the joint of the new road surface layer and the old road surface layer, the application provides a new road surface layer and old road surface layer joint structure.

The application provides a new and old road surface layer links up structure adopts following technical scheme:

the utility model provides a new and old road surface layer links up structure, is including setting up the soil filling layer between old way and new way, the new way cladding is on old way, and the new way includes new road surface layer and sets up the new road side slope in new road surface layer both sides, is equipped with the rubble bed course between soil filling layer and the new road surface layer.

By adopting the technical scheme, the new road is coated on the surface of the old road, so that no longitudinal splicing seam exists between the new road and the old road, and the possibility of fracture of the new road surface layer at the splicing seam of the new road and the old road can be reduced. The filling layer and the gravel cushion layer can reduce the possibility of rise between the new road and the old road due to poor adhesion.

Optionally, a cement layer is arranged between the new pavement layer and the gravel cushion layer.

Through adopting above-mentioned technical scheme, the cement blanket is pour on the rubble bed course for the cement blanket is fixed with the rubble, improves the stability of rubble, and the rubble rolls the possibility that influences the new pavement layer construction when reducing and pour the new pavement layer.

Optionally, the old road comprises an old roadbed, an old pavement layer and old road slopes arranged on two sides of the old pavement layer, and the old road slopes are step-shaped.

Through adopting above-mentioned technical scheme, the frictional force between the old road side slope of step form and the fill layer is bigger, can reduce the possibility that takes place to slide between fill layer and the side slope.

Optionally, at least one layer of geogrid is arranged on the old road side slope, one end of the geogrid is arranged on the old road side slope, and the other end of the geogrid is arranged in the soil filling layer.

By adopting the technical scheme, the geogrid, the soil filling layer and the old road side slope have strong interlocking force, the shearing resistance of the soil body can be enhanced, the integrity and the load capacity of the soil body can be improved, and the possibility of relative sliding between the soil filling layer and the old road side slope is further reduced.

Optionally, a reinforcing mechanism is arranged between the old roadbed and the cement layer, the reinforcing mechanism comprises a plurality of anchor rods, one end of each anchor rod is fixed in the old roadbed, and the other end of each anchor rod is fixed in the cement layer.

Through adopting above-mentioned technical scheme, the stock can provide fore-and-aft power, reduces rubble bed course and cement layer along the possibility that the level slided.

Optionally, the anchor rod is triangular pyramid-shaped, and the smaller end of the anchor rod is fixed in the old roadbed.

Through adopting above-mentioned technical scheme for during the stock inserts old road bed more easily, it is more convenient to install.

Optionally, at least one clamping groove is formed at the larger end of the anchor rod.

Through adopting above-mentioned technical scheme, when pouring the cement layer, cement can pour into the draw-in groove and solidify to strengthen the joint strength between cement layer and the stock, reduce the possibility of layering between stock and the cement layer.

Optionally, the reinforcing mechanism further comprises a plurality of reinforcing steel bars, the clamping grooves are formed in the edges of the anchor rod, at least one clamping groove is formed in each edge of the anchor rod, and the reinforcing steel bars are clamped in the clamping grooves to form a net shape.

Through adopting above-mentioned technical scheme, the reinforcing bar can be followed the plane of perpendicular stock and exert pulling force to the cement layer to reduce the possibility of cement layer fracture, and then reduce the possibility of new pavement layer fracture.

Optionally, the clamping groove comprises a bayonet and a limiting groove, the bayonet is obliquely arranged towards the larger end of the anchor rod, and the limiting groove is connected with the bayonet close to the larger end of the anchor rod.

Through adopting above-mentioned technical scheme, the user of service can follow the bayonet socket card and go into then promote the reinforcing bar and slide towards the great one end of stock to go into the reinforcing bar card and be half-circular arc with in the spacing groove, the spacing groove is kept away from bayonet socket one end, because blockking of stock edge, can reduce the possibility that the reinforcing bar followed the draw-in groove roll-off.

Optionally, one end of the limiting groove far away from the bayonet is in a semi-circular arc shape.

Through adopting above-mentioned technical scheme for spacing groove and reinforcing bar are more laminated, make the network structure of reinforcing bar more firm.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the new road is coated on the surface of the old road, so that no longitudinal splicing seam exists between the new road and the old road, and the possibility of cracking of the new road surface layer at the splicing seam of the new road and the old road can be reduced;

2. longitudinal force is provided through the anchor rods, and the possibility that the gravel cushion layer and the cement layer slide along the horizontal direction is reduced;

3. utilize the reinforcing bar to exert pulling force to the cement layer along the plane of perpendicular stock to reduce the possibility of cement layer fracture, and then reduce the possibility of new pavement layer fracture.

Drawings

Fig. 1 is a schematic view of the overall structure of a new and old pavement layer connection structure in embodiment 1 of the present application;

fig. 2 is a schematic cross-sectional view of a new and old pavement layer joining structure in embodiment 2 of the present application;

FIG. 3 is a schematic view of the whole reinforcing structure of embodiment 2 of the present application;

fig. 4 is an overall schematic view of a bolt according to embodiment 2 of the present application.

Description of reference numerals: 1. old road; 11. old roadbed; 12. an old pavement layer; 13. old road side slope; 2. a new way; 21. a new pavement layer; 22. a new road side slope; 23. an earth shoulder; 3. filling a soil layer; 4. a gravel cushion layer; 5. a cement layer; 6. a geogrid; 7. a reinforcing mechanism; 71. an anchor rod; 711. a card slot; 7111. a bayonet; 7112. a limiting groove; 72. and (5) reinforcing steel bars.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses new and old pavement layer links up structure.

Example 1

Referring to fig. 1, new and old road surface layer links up structure is including setting up the back-filling layer 3 between old way 1 and new way 2, rubble bed course 4 and cement course 5, back-filling layer 3, rubble bed course 4 and cement course 5 from the bottom up lay in proper order on old way 1, with that and keep apart old way 1 and widen old way 1, new way 2 cladding is in cement course 5 periphery for do not have fore-and-aft concatenation seam between the new and old road bed, can reduce the new way 2 and crack the possibility in the concatenation seam department of new and old road bed, back-filling layer 3 and rubble bed course 4 can reduce between new way 2 and the old way 1 because the poor possibility of rise of bonding force.

The old road 1 comprises an old road bed 11, an old pavement layer 12 and an old road slope 13, wherein the old road bed 11 can be a gravel layer, and the old road bed 11 is used for supporting the old pavement layer 12. The old road surface layer 12 can be a concrete layer poured on the old roadbed 11, and the old road side slopes 13 can be filling layers arranged on two sides of the old road surface layer 12, so that the old roadbed 11 can be covered in the old road surface layer, and the possibility of damage to the old roadbed 11 is reduced. When the construction of widening the old road surface layer 12, firstly, the old road surface layer 12 is dug or broken, then, the old road side slope 13 is dug to be step-shaped, the horizontal length of the step is more than 100cm, then, the soil filling layer 3 is formed by filling and paving the old road surface layer 11 and the old road side slope 13 with soil, so that the friction force between the old road side slope 13 and the soil filling layer 3 is larger, and the possibility that the soil filling layer 3 slides on one side close to the old road side slope 13 is reduced.

In order to further reduce the possibility that the filling layer 3 is close to the landslide on one side of the old road side slope 13, a layer of geogrid 6 with the length of 5m is arranged on the old road side slope 13, one end of the geogrid 6 is arranged on the old road side slope 13, and the other end of the geogrid 6 is arranged in the filling layer 3.

The filling layer 3 can be a clay layer which is wrapped on the periphery of the old road 1 and tamped, the thickness of the filling layer 3 is 30cm, the effect of isolating the old road 1 is achieved, and the possibility that the new road 2 rises due to poor connectivity with the old road 1 is reduced. The crushed stone pad 4 may be unscreened crushed stone of 20cm thickness laid on the side of the fill 3 parallel to the old pavement layer 12 for improving the supporting strength to the new road 2. The cement layer 5 may be 20cm thick cement poured over the gravel cushion 4 for stabilizing the gravel, reducing the possibility that the gravel particles of the gravel cushion 4 affect the laying of the new road 2.

The new road 2 comprises a new road surface layer 21, a new road slope 22 and a road shoulder 23, the new road surface layer 21 can be a concrete panel paved on the cement layer 5, and the new road surface layer 21 has the thickness of 24cm and the width of 700 cm. The soil shoulder 23 is a filling layer with a width of 50cm, and is used for covering the two ends of the new road surface layer 21, the gravel cushion layer 4 and the cement layer 5 along the width, so that the possibility that the two ends of the new road surface layer 21, the gravel cushion layer 4 and the cement layer 5 along the width are damaged is reduced. The new road side slopes 22 are arranged on two sides of the new road surface layer 21 and connected with the soil shoulders 23, the new road side slopes 22 are laid on the old road side slopes 13, and the gradient of the new road side slopes 22 is 1: 1.5.

The concrete use mode of new and old road surface layer connection structure of embodiment 1 of this application is: the new road 2 is coated on the surface of the old road 1, so that no longitudinal splicing seam exists between the new and old roadbeds, and the possibility that the new road surface layer 21 is broken at the splicing seam of the new and old roadbeds can be reduced. The fill 3, the gravel pack 4 and the cement layer 5 can reduce the possibility of delamination between the new road 2 and the old road 1 due to poor adhesion.

Example 2

The new and old pavement layer connection structure is different from the embodiment 1 in that: referring to fig. 2 and 3, a reinforcing mechanism 7 is arranged between the old roadbed 11 and the cement layer 5, the reinforcing mechanism 7 comprises a plurality of anchor rods 71 and a plurality of reinforcing steel bars 72, the anchor rods 71 are triangular taper-shaped, after the filler layer 3 is laid by a user, the smaller end of the anchor rod 71 is inserted into the old roadbed 11, one end of the anchor rod 71, which is far away from the filler layer 3, is higher than the filler layer 3, then the gravel cushion layer 4 and the cement layer 5 are sequentially laid on the filler layer 3, and one end of the anchor rod 71, which is far away from the filler layer 3, is embedded in the cement layer 5, so that the anchor rod 71 can provide longitudinal force, and the possibility that the gravel cushion layer 4 and the cement layer 5 slide along the horizontal direction is reduced.

Three draw-in grooves 711 are seted up to the great one end of stock 71, and a draw-in groove 711 is seted up on each edge of stock 71, even when must pour cement layer 5, cement can pour into in the draw-in groove 711 and solidify to strengthen the joint strength between cement layer 5 and the stock 71, reduce the possibility of layering between stock 71 and the cement layer 5. The reinforcing steel bars 72 can be clamped into the clamping grooves 711, and the plurality of reinforcing steel bars 72 are intersected to form a net shape, so that tension can be applied to the cement layer 5 along the plane of the vertical anchor rod 71, the possibility of cracking of the cement layer 5 is reduced, and the possibility of cracking of the new pavement layer 21 is reduced.

Referring to fig. 3 and 4, to reduce the possibility of the reinforcing bars 72 slipping out of the slots 711, the slots 711 include bayonets 7111 and retaining grooves 7112, and the bayonets 7111 are inclined toward the larger end of the anchor bar 71 to facilitate the user to slide the reinforcing bars 72 toward the larger end of the anchor bar 71. The limiting groove 7112 is communicated with the bayonet 7111 close to the larger end of the anchor rod 71, the limiting groove 7112 is arranged in parallel to the axis of the anchor rod 71, so that a user can clamp the reinforcing steel bar 72 into the bayonet 7111 and then push the reinforcing steel bar 72 to slide towards the larger end of the anchor rod 71, the reinforcing steel bar 72 is clamped into the limiting groove 7112, and the possibility that the reinforcing steel bar 72 horizontally slides out of the limiting groove 7112 can be reduced due to blocking of the edge of the anchor rod 71. The end, far away from the bayonet 7111, of the limiting groove 7112 is in a semicircular arc shape, so that the limiting groove 7112 is more attached to the reinforcing steel bar 72, and the net structure of the reinforcing steel bar 72 is more stable.

The concrete use mode of new and old road surface layer connection structure of embodiment 2 of this application is: the anchor rods 71 are connected in the old roadbed 11 and the cement layer 5, so that the anchor rods 71 can provide longitudinal force, and the possibility of horizontal sliding of the gravel cushion layer 4 and the cement layer 5 is reduced.

Meanwhile, the reinforcing steel bars 72 are connected to the anchor rods 71, so that the plurality of reinforcing steel bars 72 are intersected to form a net shape, tension can be applied to the cement layer 5 along the plane perpendicular to the anchor rods 71, the possibility of cracking of the cement layer 5 is reduced, and the possibility of cracking of the new pavement layer 21 is further reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a new and old road surface layer links up structure which characterized in that: including setting up at the back-filling layer (3) between old way (1) and new way (2), new way (2) cladding is on old way (1), and new way (2) are equipped with rubble bed course (4) including new road surface layer (21) and setting in new way side slope (22) of new road surface layer (21) both sides between back-filling layer (3) and new road surface layer (21).

2. The new and old pavement layer connection structure according to claim 1, wherein: and a cement layer (5) is arranged between the new pavement layer (21) and the gravel cushion layer (4).

3. The new and old pavement layer connection structure according to claim 1, wherein: the old road (1) comprises an old roadbed (11), an old pavement layer (12) and old road slopes (13) arranged on two sides of the old pavement layer (12), wherein the old road slopes (13) are step-shaped.

4. The new and old pavement layer joining structure according to claim 3, wherein: at least one layer of geogrid (6) is arranged on the old road side slope (13), one end of the geogrid (6) is arranged on the old road side slope (13), and the other end of the geogrid (6) is arranged in the soil filling layer (3).

5. The new and old pavement layer joining structure according to claim 3, wherein: be equipped with between old road bed (11) and cement layer (5) and strengthen mechanism (7), strengthen mechanism (7) and include many stock (71), stock (71) one end is fixed in old road bed (11), and stock (71) other end is fixed in cement layer (5).

6. The new and old pavement layer connection structure according to claim 5, wherein: the anchor rods (71) are triangular pyramid-shaped, and the smaller ends of the anchor rods (71) are fixed in the old roadbed (11).

7. The new and old pavement layer connection structure according to claim 6, wherein: at least one clamping groove (711) is formed in the larger end of the anchor rod (71).

8. The new and old pavement layer connection structure according to claim 7, wherein: reinforcing mechanism (7) still include many reinforcing bars (72), and draw-in groove (711) are seted up on the edge of stock (71), and at least one draw-in groove (711) of each edge of stock (71), reinforcing bar (72) joint form in draw-in groove (711) and are netted.

9. The new and old pavement layer connection structure according to claim 8, wherein: the clamping groove (711) comprises a clamping opening (7111) and a limiting groove (7112), the clamping opening (7111) is obliquely arranged towards the larger end of the anchor rod (71), and the limiting groove (7112) is connected with the larger end, close to the anchor rod (71), of the clamping opening (7111).

10. The new and old pavement layer joining structure according to claim 9, wherein: one end of the limiting groove (7112) far away from the bayonet (7111) is in a semi-circular arc shape.