CN214401394U

CN214401394U - Bridgehead roadbed structure

Info

Publication number: CN214401394U
Application number: CN202023338355.1U
Authority: CN
Inventors: 陈昌琳; 陈瑞; 刘景川; 刘惠星; 刘源; 刘蕊; 张世卿; 张得嵩; 刘丽娜
Original assignee: Henan Transportation Survey And Design Co ltd
Current assignee: Henan Transportation Survey And Design Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-15
Anticipated expiration: 2030-12-31

Abstract

The utility model belongs to the technical field of the technique of a bridgehead structure and specifically relates to a bridgehead roadbed structure is related to, and it includes the abutment, be connected with the attachment strap on the abutment, one side overlap joint of attachment strap is on the abutment, and the below of attachment strap is provided with the bearing board, the below of bearing board is provided with the road bed, and the below of road bed is provided with the load layer, the road surface layer has been laid to road bed upper surface. This application has the effect that slows down impaired speed in bridgehead and the road bed junction use.

Description

Bridgehead roadbed structure

Technical Field

The application relates to the technical field of highway engineering, in particular to a bridgehead roadbed structure.

Background

The phenomenon that the vehicle jumps at the bridge head due to the fact that the vehicle runs and bumps because of large settlement difference caused by large rigidity difference between the bridge abutment and the roadbed is solved. The bump at the bridge head seriously affects the driving safety and comfort, and simultaneously the impact load generated by the bump has very adverse effect on the abutment. The speed of slowing down the bump at the bridge head and improving the safety and the comfort of driving is always important in the construction of highway engineering.

Patent document with publication number CN203383116U discloses a road-bridge connecting section rigidity-variable roadbed, which comprises a roadbed, wherein a cushion layer is laid on the roadbed, a base layer is laid on the cushion layer, a surface layer is laid on the base layer, a wearing layer is laid on the surface layer, gravel piles are arranged in the roadbed, and the density of the gravel piles in the base layer in the bridge head area of the road-bridge connecting section is greater than that of the gravel piles in the road-bridge connecting section. The joints of the bridge heads are set to be variable rigidity through the gravel piles which are distributed unevenly.

But the damage speed to the bridgehead connection is large during the use process.

SUMMERY OF THE UTILITY MODEL

In order to improve the quick impaired problem in bridgehead and the road bed junction use, this application provides a bridgehead roadbed structure.

The application provides a bridgehead roadbed structure adopts following technical scheme:

the utility model provides a bridgehead roadbed structure, includes the abutment, be connected with the attachment strap on the abutment, one side overlap joint of attachment strap is on the abutment, and the below of attachment strap is provided with the bearing board, the below of bearing board is provided with the roadbed, and the below of roadbed is provided with the load layer, the pavement layer has been laid to roadbed upper surface.

Through adopting above-mentioned technical scheme, during the use, with one side overlap joint of attachment strap on the abutment, one side and the abutment of attachment strap are in same sunken speed, the opposite side of attachment strap is provided with the bearing board, the below of bearing board is provided with the bearing layer, can the bearing layer support the one side that the abutment was kept away from to the attachment strap, reduce the subsidence of attachment strap, thereby can settle steadily at abutment department road surface layer, reduce and take place steeper settlement phenomenon in abutment department, thereby slow down the impaired speed of abutment department in the use.

Preferably, one side of the abutment close to the butt strap is provided with a step, one side of the butt strap close to the abutment is placed on the step, and a deformable cushion layer is arranged between the step and the lower surface of the butt strap.

Through adopting above-mentioned technical scheme, set up the step on the abutment, support the attachment strap through the step to the deformable bed course can make the attachment strap take place to incline the back, makes the step still can have good support to the attachment strap.

Preferably, asphalt filler is filled between the butt strap and the step vertical face.

By adopting the technical scheme, the asphalt filler is filled between the butt strap and the vertical face of the step, and after the butt strap inclines, the butt strap and the step are transited through the asphalt filler, so that the driving discomfort caused by the gap between the butt strap and the abutment is reduced.

Preferably, the lower surface of the bearing plate is provided with a plurality of bearing columns, the bearing columns are vertically arranged, the lower ends of the bearing columns extend into the bearing layer, and the lengths of the bearing columns inserted into the bearing layer are gradually reduced when the bearing columns are distributed in the direction far away from the abutment.

Through adopting above-mentioned technical scheme, the lower surface of bearing board sets up the bearing post to many bearing posts reduce gradually to the length of keeping away from abutment direction arrangement bearing layer, thereby can make the bearing board to keeping away from abutment direction downward deformation gradual transition, reduce the bearing board differential settlement and take place to damage.

Preferably, the length difference value of the lower ends of the two adjacent bearing columns inserted into the bearing layer is gradually reduced towards the direction far away from the bridge abutment.

Through adopting above-mentioned technical scheme, the length difference that two adjacent bearing post inserted the bearing layer reduces gradually, can further pass gradually along keeping away from the abutment direction to the bearing board.

Preferably, the bearing column and the bearing plate are formed by pouring concrete materials, and the bearing plate and the bearing column are integrally arranged.

By adopting the technical scheme, the bearing column and the bearing plate are integrally arranged, so that the bearing plate and the bearing column are better in connection firmness.

Preferably, one side of the bearing layer, which is far away from the abutment, is arranged in an inverted ladder shape.

By adopting the technical scheme, one side of the bearing layer, which is far away from the abutment, is arranged to be in the inverted ladder shape, so that the thickness of the bearing layer is gradually reduced, and the bearing layer can be transited to the ground.

Preferably, the pavement layer includes road subbase, road surface basic unit and the road surface layer that sets gradually from bottom to top, the attachment strap is located the road surface layer.

Through adopting above-mentioned technical scheme, set up the strap in the inside of road surface finish, make the road surface finish complete, reduce the change of the road surface condition of driving the vehicle in-process.

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

1. one side of the butt strap is lapped on the abutment, one side of the butt strap and the abutment are at the same sinking speed, the other side of the butt strap is provided with a bearing plate, a bearing layer is arranged below the bearing plate, and the bearing layer can support one side of the butt strap away from the abutment, so that the stable sinking of a pavement layer at the abutment can be realized, the steep sinking phenomenon at the bridge head can be reduced, and the damage speed at the bridge head in the use process can be reduced;

2. the step is arranged on the abutment, the butt strap is supported by the step, and the deformable cushion layer can enable the step to still have good support for the butt strap after the butt strap is inclined;

3. the bearing columns are arranged on the lower surface of the bearing plate, and the length of the bearing layers distributed in the direction far away from the abutment is gradually reduced by the bearing columns, so that the bearing plate is gradually transformed in the downward direction far away from the abutment, and the bearing plate is prevented from being damaged due to uneven settlement.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Description of reference numerals: 1. an abutment; 11. a step; 12. a deformable cushion layer; 13. a bitumen filler; 2. a front cone slope; 3. a bridge; 4. a butt strap; 5. a support plate; 51. a bearing column; 6. a bearing layer; 7. a road bed; 8. a pavement layer; 81. a pavement sub-base layer; 82. a pavement base; 83. a pavement facing; 9. a pit.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a bridge head roadbed structure, refer to figure 1, comprising an abutment 1, a front abutment taper slope 2 is arranged below the abutment 1, the abutment 1 is fixedly arranged through the front abutment taper slope 2, one side of the abutment 1 is connected with a bridge 3, a step 11 is arranged on one side of the abutment 1 away from the bridge 3, the step 11 and the abutment 1 are of a concrete pouring integrated structure, a butt strap 4 is erected on the horizontal plane of the step 11, a gap is left between the vertical plane of the step 11 and the side edge of the butt strap 4, the width of the gap is 1cm, a bearing plate 5 is arranged on the lower surface of the butt strap 4, a bearing layer 6 for supporting the bearing plate 5 is arranged below the bearing plate 5, the butt strap 4 is supported through the bearing plate 5, and the butt strap 4 is erected on one side of the step 11 and sinks along with the settlement of the abutment 1, so that one side of the butt strap 4 close to the step 11 can be the extension of the bridge 3, the side of the strap 4 remote from the step 11 is supported by the support plate 5, so that the amount of sinking of the strap 4 can be reduced.

The lower surface of the bearing plate 5 is provided with a plurality of bearing columns 51, the plurality of bearing columns 51 are distributed on the lower surface of the bearing plate 5 in a matrix manner, the length of the plurality of bearing columns 51 in the width direction of the bridge 3 is the same, the length of the plurality of bearing columns 51 inserted into the bearing layer 6 is also the same, when the plurality of bearing columns 51 arranged in the length direction of the bridge 3 are distributed in the direction far away from the bridge abutment 1, the length of the bearing columns 51 is gradually reduced, the length of the bearing columns 51 inserted into the bearing layer 6 is also reduced, and the length difference value between two adjacent bearing columns 51 is also gradually reduced in the direction far away from the bridge abutment 1, so that the supporting force of the bearing plate 5 is changed in a transition manner, the change of the connection part of the bridge abutment 1 tends to be mild, and a large steep slope generated by sudden change is reduced.

The bearing column 51 is a concrete prefabricated part, the lower end of the bearing column 51 is vertically inserted into the bearing layer 6, the bearing layer 6 is made by paving and compacting lime soil, a layer of road bed 7 needs to be paved on the bearing layer 6 before the bearing column 51 is inserted into the bearing layer 6, after the road bed 7 is paved, the bearing column 51 simultaneously penetrates through the road bed 7 and the bearing layer 6, the bearing column 51 provides upward supporting force through the bearing layer 6, and the bearing plate 5 made of poured concrete is arranged at the upper end of the bearing column 51, so that the bearing plate 5 and the bearing column 51 are solidified into a whole, and the bearing plate 5 can be better supported through the bearing column 51.

Be provided with deformable cushion 12 between the lower surface of attachment strap 4 and step 11, deformable cushion 12 is the oil felt bed course, and deformable cushion 12's thickness is 1cm, carries out even support to attachment strap 4 through deformable cushion 12, reduces attachment strap 4 and takes place to damage. Meanwhile, the gap between the butt strap 4 and the vertical surface of the step 11 is filled with asphalt filler 13, the asphalt filler 13 is asphalt mastic, the gap between the butt strap 4 and the abutment 1 is filled with the asphalt filler 13, and vibration of vehicle walking caused by the gap formed between the butt strap 4 and the abutment 1 after the butt strap 4 is settled can be reduced.

The pavement layer 8 is laid on the upper surface of the roadbed 7, the pavement layer 8 comprises a pavement underlayer 81, a pavement base layer 82 and a pavement surface layer 83, the pavement underlayer 81 is laid on the roadbed 7, the pavement base layer 82 is laid on the pavement underlayer 81, the total thickness of the pavement base layer 82 and the pavement underlayer 81 is equal to the thickness of the bearing plate 5, the pavement underlayer 83 is laid on the pavement underlayer 81, the thickness of the pavement surface layer 83 is greater than that of the butt strap 4, and the butt strap 4 is embedded in the pavement surface layer 83.

When the bearing layer 6 is laid, a pit 9 is dug in the ground, one side of the pit 9 close to the abutment 1 is in a step shape, then the bearing layer 6 is laid in the pit 9, the bearing layer 6 is located on one side far away from the abutment 1 to form an inverted step-shaped structure, the thickness of the bearing layer 6 is gradually reduced, and the settlement of the bearing layer 6 at the connection position of the ground position can be gradually transited due to the gradual reduction of the thickness of the bearing layer 6.

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. A bridgehead roadbed structure comprises a bridge abutment (1), and is characterized in that: the bridge abutment is characterized in that an abutment plate (4) is connected to the bridge abutment (1), one side of the abutment plate (4) is in lap joint with the bridge abutment (1), a bearing plate (5) is arranged below the abutment plate (4), a road bed (7) is arranged below the bearing plate (5), a bearing layer (6) is arranged below the road bed (7), and a road surface layer (8) is laid on the upper surface of the road bed (7).

2. A bridgehead roadbed structure according to claim 1, wherein: one side that abutment (1) is close to attachment strap (4) is provided with step (11), one side that attachment strap (4) are close to abutment (1) is taken and is put on step (11), be provided with deformable cushion (12) between step (11) and attachment strap (4) lower surface.

3. A bridgehead roadbed structure according to claim 2, wherein: asphalt filler (13) is filled between the butt strap (4) and the vertical surface of the step (11).

4. A bridgehead roadbed structure according to claim 1, wherein: the lower surface of the bearing plate (5) is provided with a plurality of bearing columns (51), the bearing columns (51) are vertically arranged, the lower ends of the bearing columns (51) extend into the bearing layer (6), and the lengths of the bearing columns (51) which are inserted into the bearing layer (6) are gradually reduced when the bearing columns (51) are distributed in the direction far away from the abutment (1).

5. A bridgehead roadbed structure according to claim 4, wherein: the length difference of the lower ends of the two adjacent bearing columns (51) inserted into the bearing layer (6) is gradually reduced towards the direction far away from the bridge abutment (1).

6. A bridgehead roadbed structure according to claim 5, wherein: the bearing column (51) and the bearing plate (5) are formed by pouring concrete materials, and the bearing plate (5) and the bearing column (51) are integrally arranged.

7. A bridgehead roadbed structure according to claim 1, wherein: one side of the bearing layer (6) far away from the bridge abutment (1) is arranged in an inverted ladder shape.

8. A bridgehead roadbed structure according to claim 1, wherein: road surface layer (8) are including road surface subbase (81), road surface basic unit (82) and road surface layer (83) that set gradually from lower supreme, attachment strap (4) are located road surface layer (83).