CN212771900U

CN212771900U - Gravity type abutment rear drainage structure for preventing and treating bump at bridge head

Info

Publication number: CN212771900U
Application number: CN202020932745.2U
Authority: CN
Inventors: 赵振军; 程小亮; 王阳; 赵乾文; 唐震; 陈刚
Original assignee: Wisdri Engineering and Research Incorporation Ltd; Wisdri Urban Construction Engineering Technology Co Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd; Wisdri Urban Construction Engineering Technology Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-03-23
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a drainage structures behind gravity type abutment platform of prevention and cure bridgehead bump car, enlarge the basis including the abutment, be equipped with abutment front wall and two abutment side walls on the abutment enlarges the basis, two abutment side walls arrange in the both sides of abutment front wall, form U type abutment, the space that encloses between abutment expansion basis and abutment front wall and two abutment side walls is the filler region behind the platform, and drainage structure layer and bridgehead attachment strap have been arranged in proper order to filler region top behind the platform. The water seepage in the roadbed can be effectively eliminated, the drainage efficiency is improved, and the bridge head bumping disease of the bridge transition section can be effectively prevented and treated.

Description

Gravity type abutment rear drainage structure for preventing and treating bump at bridge head

Technical Field

The utility model relates to a building engineering technical field, concretely relates to gravity type abutment rear drainage structure of prevention and cure bridgehead bump car.

Background

In the construction of highways and urban roads, the construction quality control of the road and bridge passing sections is always a difficult point in engineering construction. The main reasons are as follows: firstly, road bridge changeover portion construction district is narrow and small, and the large-scale machinery of being not convenient for expandes, so the unable assurance of road bed compaction quality causes the road bed to subside after the worker great. Secondly, the difference of the structures of the roadbed and the abutment inevitably causes the difference of the transition section of the road bridge to settle, thereby causing the bump at the bridge head. Thirdly, for the gravity type U-shaped abutment, because three sides formed by the front wall and the side walls enclose the barrier and hinder the drainage of surface water seeping downwards, accumulated water is easier to form in the filling material behind the abutment, and therefore the bearing capacity of the roadbed behind the abutment is reduced, and the settlement of the roadbed after construction is increased. In conclusion, timely and effective removal of the water seepage behind the gravity type U-shaped bridge abutment is of great significance for reducing the settlement of the subgrade after construction and preventing and treating the bumping at the bridge head.

The drainage technology behind current platform generally is through set up drainage blanket or setting up the drainage french drain at the enlarged basis and realize the drainage behind the platform in the filler behind the platform, and the ubiquitous drainage efficiency is low, the not good problem of drainage effect, therefore prior art still exists the improvement space.

Disclosure of Invention

The to-be-solved technical problem of the utility model is, to the above-mentioned defect that prior art exists, provide a gravity type abutment rear drainage structures of prevention and cure bridgehead skip car, can effectively get rid of the inside infiltration of road bed, improve drainage efficiency, can effectively prevent and cure the bridgehead skip car disease of road bridge changeover portion.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:

the utility model provides a prevent and treat drainage structures behind abutment of gravity type abutment of bridgehead bump, includes abutment expansion basis, is equipped with abutment front wall and two abutment side walls on the abutment expansion basis, and two abutment side walls arrange the both sides of abutment front wall, form U type abutment, and the space that encloses between abutment expansion basis and abutment front wall and two abutment side walls is the filler district behind the abutment, has arranged drainage structure layer and bridgehead attachment strap in proper order above the filler district behind the abutment.

According to the technical scheme, the bottom of the drainage structure layer is laid with the anti-seepage geotextile, and the middle part and/or the upper part of the drainage structure layer is laid with the anti-filtration geotextile.

According to the technical scheme, the rear end of the drainage structure layer exceeds the rear end of the bridge end lapping plate by at least 10 cm.

According to the technical scheme, the drainage structure layer comprises the transverse drainage layer and the drainage blind ditches, the drainage blind ditches are arranged below two sides of the transverse drainage layer, transverse drainage holes are formed in the abutment side walls on two sides, and the transverse drainage holes are communicated with the drainage blind ditches.

According to the technical scheme, the thickness of the transverse drainage layer is 25-35 cm, and the transverse drainage layer is arranged in the range of the abutment rear roadbed upper roadbed.

According to the technical scheme, the transverse drainage layer is longitudinally arranged in parallel with the two abutment side walls of the abutment, and the transverse drainage layer transversely inclines to 1-2% of the two sides of the abutment to form a drainage transverse slope.

According to the technical scheme, the drainage blind ditches are longitudinally arranged, the length direction of the drainage blind ditches is parallel to the side walls of the two abutment platforms of the abutment platforms, and the longitudinal slope is consistent with the longitudinal slope of the road.

According to the technical scheme, the longitudinal drain pipe is laid in the drain blind ditch and connected with the transverse drain pipes, and the transverse drain pipes penetrate through the transverse drain holes in the abutment side walls on the two sides and extend to the outside of the abutment side walls.

According to the technical scheme, the longitudinal drain pipe comprises a soft water permeable pipe, and the soft water permeable pipe is wrapped with the reverse filter geotextile.

According to the technical scheme, the transverse drain hole is inclined downwards from inside to outside, and the inclination of the inclination is 4-6%.

The utility model discloses following beneficial effect has:

the utility model discloses can effectively get rid of the inside infiltration of road bed, improve drainage efficiency, it is economical and reasonable, the rainwater of having solved the prior art existence is at the inside seepage flow path overlength of road bed, the drainage efficiency is low, the not good problem of drainage effect, can effectively prevent and treat the bridgehead of road bridge changeover portion and jump the car disease.

Drawings

Fig. 1 is a schematic structural view of a gravity type abutment rear drainage structure for preventing and treating bridge-head bump in the embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

in the figure, 1-abutment enlarged foundation, 2-side wall, 3-front wall, 4-rear filling area, 5-drainage structure layer, 5-1-transverse drainage layer, 5-2-drainage blind ditch, 6-impermeable geotextile, 7-reverse filter geotextile, 8-longitudinal drainage pipe, 9-transverse drainage pipe, 10-bridge head butt strap and 11-transverse drainage hole.

Detailed Description

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

Referring to fig. 1-2, the utility model provides a gravity type abutment rear drainage structures of prevention and cure bridgehead bump in embodiment, enlarge the basis including the abutment, be equipped with wall and two abutment side walls before the abutment on the abutment enlarges the basis, two abutment side walls arrange in the both sides of wall before the abutment, form U type abutment, the space that encloses between wall and two abutment side walls before abutment enlargement basis and the abutment fills the district for the abutment rear, has arranged drainage structure layer and bridgehead attachment strap in proper order above the filler district behind the abutment.

Furthermore, the bottom of the drainage structure layer is laid with impermeable geotextile, and the middle part and/or the upper part of the drainage structure layer is laid with anti-filtration geotextile.

Further, the rear end of the drainage structure layer exceeds the rear end of the bridge end butt strap by at least 10 cm.

Furthermore, the rear end of the drainage structure layer and the rear end of the bridge head butt strap both refer to one end of the abutment front wall in the opposite direction.

Further, the drainage structure layer comprises a transverse drainage layer and drainage blind ditches, the drainage blind ditches are arranged below two sides of the transverse drainage layer, transverse drainage holes are formed in the abutment side walls on two sides, and the transverse drainage holes are communicated with the drainage blind ditches; the transverse drainage layer drains water through the drainage blind ditch and is discharged to the outside from the transverse drainage hole.

Furthermore, the thickness of the transverse drainage layer is 25-35 cm, the transverse drainage layer is arranged in the range of the roadbed on the roadbed behind the roadbed, and the transverse drainage layer is arranged in the full width range of the cross section of the roadbed; in the structural design, the drainage structure layer is arranged in the range of the roadbed on the roadbed at the rear of the platform, so that the seepage path of rainwater seeping downwards at the rear of the platform is shortened, and the rainwater on the earth surface can be prevented from further seeping downwards to enter the roadbed at the lower part, thereby improving the rainwater removal efficiency and effectively preventing and treating the bridge head bumping disease of the bridge transition section.

Further, the thickness of the lateral drainage layer was 30 cm.

Further, the transverse drainage layers are arranged longitudinally, the length direction of the drainage blind ditches is parallel to the two abutment side walls of the abutment, and the transverse drainage layers transversely incline to the two sides of the abutment by 1-2% to form drainage transverse slopes.

Furthermore, the drainage blind ditch is longitudinally arranged in parallel with the two abutment side walls of the abutment, and the longitudinal slope is consistent with the road longitudinal slope.

Furthermore, a longitudinal drain pipe is laid inside the drainage blind ditch and is transversely connected with a transverse drain pipe, and the transverse drain pipe penetrates through transverse drain holes in the abutment side walls on the two sides and extends to the outside of the abutment side walls.

Further, the longitudinal drain pipe comprises a soft water permeable pipe, and the soft water permeable pipe is wrapped with a reverse filter geotextile.

Furthermore, the transverse drain hole is inclined downwards from inside to outside, and the inclination of the inclination is 4% -6%.

In the specific implementation process, after the bridge abutment reinforcing steel bars are bound, bridge abutment concrete is poured (transverse drain holes are reserved on side walls during pouring) and maintained to 80% of the design strength, a filling area behind the bridge abutment is constructed, small machines are used for tamping filling layer by layer, filling is stopped when the bridge abutment concrete is filled to the top surface of an upper road bed, a drainage blind ditch groove is excavated, impermeable geotextile is laid, longitudinal drain pipes and transverse drain pipes are buried underground, then a drainage structural layer is constructed, and the drainage structural layer can be made of materials with good water permeability, such as broken stones and gravels. When the drainage structure layer is constructed to the upper part, the reversed filter geotextile is laid, then the drainage structure layer is continuously constructed to the top surface of the road bed, and finally the bridge head butt strap is erected, wherein the upper plane of the bridge head butt strap is consistent with the road surface.

The above is only a preferred embodiment of the present invention, and the scope of the right of the present invention should not be limited by this, so that the equivalent changes made in the claims of the present invention still belong to the protection scope of the present invention.

Claims

1. A gravity type abutment rear drainage structure for preventing and treating bridge head bumping is characterized by comprising an abutment enlarged foundation, wherein the abutment enlarged foundation is provided with an abutment front wall and two abutment side walls, the two abutment side walls are arranged on two sides of the abutment front wall, a space enclosed by the abutment enlarged foundation, the abutment front wall and the two abutment side walls is a post-abutment filling area, and a drainage structure layer and a bridge head butt strap are sequentially arranged above the post-abutment filling area;

the drainage structure layer comprises a transverse drainage layer and drainage blind ditches, the drainage blind ditches are arranged below two sides of the transverse drainage layer, transverse drainage holes are formed in the side walls of the abutment at two sides, and the transverse drainage holes are communicated with the drainage blind ditches; the transverse drainage layer is arranged in the range of the roadbed at the rear part of the abutment.

2. The gravity type abutment rear drainage structure for preventing and treating bridge head bumping as claimed in claim 1, wherein the bottom of the drainage structure layer is coated with impermeable geotextile, and the middle and/or upper part of the drainage structure layer is coated with anti-filtration geotextile.

3. A gravity type abutment rear drainage structure for preventing bump at bridge head as claimed in claim 1, wherein the rear end of the drainage structure layer exceeds the rear end of the bridge head butt strap by at least 10 cm.

4. The gravity type abutment rear drainage structure for preventing and treating bump at bridge head as claimed in claim 1, wherein the thickness of the transverse drainage layer is 25-35 cm.

5. The gravity type abutment rear drainage structure for preventing and treating bridge-head bumping as claimed in claim 1, wherein the transverse drainage layer is longitudinally arranged in parallel with the two abutment side walls of the abutment, and the transverse drainage layer is transversely inclined to both sides of the abutment by 1-2% to form a drainage transverse slope.

6. The gravity type abutment rear drainage structure for preventing and treating bridge-head vehicle bump according to claim 1, wherein the blind drainage ditch is arranged along the longitudinal direction, and the length direction of the blind drainage ditch is arranged in parallel with the two abutment side walls of the abutment.

7. The gravity type abutment rear drainage structure for preventing and treating bridge head bumping as claimed in claim 6, wherein a longitudinal drainage pipe is laid inside the drainage blind ditch and connected with a transverse drainage pipe, and the transverse drainage pipe passes through the transverse drainage holes inside the abutment side walls at two sides and extends to the outside of the abutment side walls.

8. The gravity type abutment rear drainage structure for preventing and treating bump at bridge head of claim 7, wherein the longitudinal drainage pipe comprises a water permeable hose, and the water permeable hose is wrapped with a geotextile for reversed filtration.

9. The gravity type abutment rear drainage structure for preventing and treating bridge-head bump as claimed in claim 1, wherein the transverse drainage hole is inclined downwards from inside to outside, and the inclination of inclination is 4-6%.