CN217438691U

CN217438691U - Step type bridge abutment suitable for steep slope terrain

Info

Publication number: CN217438691U
Application number: CN202220440461.0U
Authority: CN
Inventors: 聂细锋; 龚亚军; 黄树强; 陈克坚; 任科; 刘志军; 杜新; 万志城; 朱永东
Original assignee: CREEC Guiyang Survey Design and Research Co Ltd
Current assignee: CREEC Guiyang Survey Design and Research Co Ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-09-16
Anticipated expiration: 2032-03-01

Abstract

The utility model provides a step abutment suitable for abrupt slope topography, the abutment body is through setting up to the step shape to effectively reduce the abutment volume, make it suitable mutually with abrupt slope topography, reduce side slope excavation scope, and be favorable to reducing engineering cost. Including cushion cap, platform body and pile foundation, the pile foundation vertically sets up with horizontal interval under the cushion cap, and pile foundation upper end concreties with the cushion cap, and the platform body sets up on the cushion cap top surface and concreties as an organic wholely with it, the platform body bottom leans on abrupt slope topography side to be the step form behind the platform, and the embedding supports on the step form is domatic.

Description

Step type bridge abutment suitable for steep slope terrain

Technical Field

The utility model relates to a bridge, in particular to step abutment suitable for abrupt slope topography.

Background

The abutment is a component of the bridge substructure, is used for supporting the bridge superstructure and is connected with the road lift, and has the functions of transferring the load of the bridge superstructure to the foundation, resisting the filling pressure behind the abutment, and stabilizing the rigidity and the stability of the bridge head roadbed, the road surface and the bridge deck.

With the construction of a great deal of bridge engineering in mountainous areas, a high bridge abutment and a large cone are required to be arranged when an abutment is arranged in a steep slope section, and the bridge abutment adopted at present is a gravity type U-shaped bridge abutment or a rectangular bridge abutment. The gravity type abutment has good integral stability, but the foundation size is large, the side slope excavation range is wide, the construction danger of a steep slope section is high, and a strong side slope protection measure is required.

Engineering practice shows that, in order to overcome the shortcomings of large size, large excavation area and large protection measure amount of the traditional gravity type abutment, a novel abutment structure form is urgently needed, so that the side slope excavation can be reduced, and the high condition of the abutment height can be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a step abutment suitable for abrupt slope topography is provided, the abutment body is through setting to the step shape to effectively reduce the abutment volume, make it suitable with abrupt slope topography, reduce side slope excavation scope, and be favorable to reducing engineering cost.

The utility model provides a technical scheme that its technical problem adopted as follows:

the utility model relates to a step abutment suitable for abrupt slope topography, including cushion cap, platform body and pile foundation, the pile foundation sets up with horizontal interval vertically under the cushion cap, and pile foundation upper end concreties with the cushion cap, and the platform body sets up on the cushion cap top surface and concreties as an organic wholely with it, characterized by: the bottom of the platform body is in a step shape on the side of the steep slope terrain behind the platform, and is embedded and supported on the slope surface of the step shape.

The utility model has the advantages that the stepped bridge abutment is arranged according to local conditions according to the steep slope terrain, the concrete volume of the abutment body can be effectively reduced, and the engineering economy is improved; effectively reducing the excavation range of the side slope and protective measures, enhancing the engineering safety and being beneficial to environmental protection.

Drawings

The specification includes the following two figures:

fig. 1 is a vertical view of a stepped abutment suitable for steep slope topography of the present invention.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.

The figures show the components and corresponding references: bearing platform 10, platform body 11, abutment front wall 12, abutment top cap 13, pile foundation 20, ground line D.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to fig. 1 and 2, the utility model relates to a step abutment suitable for abrupt slope topography, including cushion cap 10, platform body 11 and pile foundation 20, pile foundation 20 sets up with horizontal interval vertically under cushion cap 11, and pile foundation 20 upper end concreties with cushion cap 11, and platform body 11 sets up on the cushion cap top surface and concreties as an organic wholely with it, 11 bottoms of platform body lean on abrupt slope topography side to be the step form behind the platform, and the embedding supports on the step form is domatic. The step type bridge abutment is arranged according to the steep slope terrain according to local conditions, the height and the width of the step can be determined according to the steep slope terrain, the side slope excavation range and the protection measures can be effectively reduced, the concrete volume of the abutment body can be effectively reduced, the engineering economy is improved, the engineering safety is enhanced, and the environmental protection is facilitated.

Referring to fig. 1, an abutment front wall 12 is arranged on the top surface of the bearing platform 10 and on the front side of the platform body 11, an abutment top cap 13 is arranged on the top of the abutment front wall 12, the abutment front wall 12 is integrally connected with the bearing platform 10 and the platform body 11, and the abutment top cap 13 is integrally connected with the abutment front wall 12 and the platform body 11.

The abutment coping 13 supports the upper structural beam body of the bridge and transmits the upper structural load to the abutment platform 10 and the pile foundation 20 through the abutment front wall 12. In order to facilitate the vertical mold pouring of the platform body 11, a front edge with the width of about 0.5m is arranged at the joint of the platform body 11 and the bearing platform 10.

Example (b):

taking a three-line railway bridge as an example, the bridge abutment is limited by terrain conditions, the length of the bridge abutment needs 10.6m, the height of the bridge abutment is 7m, and the width of the bridge abutment is 12.5 m. The concrete quantity of the bearing platform and the body of the traditional rectangular bridge abutment is about 1653.8m ³ The consumption of the steel bars is about 46.8t, and the volume of the excavated earth and stone is about 1635m ³ And 20 pile foundations are adopted. Adopt the utility model discloses during step abutment, cushion cap and stage body concrete quantity are about 1025.5m ³ The consumption of the steel bars is about 27.5t, and the volume of the excavated earth and stone is about 786m ³ The number of the pile foundations is 15. Both compare, the utility model discloses the reducible 38% of concrete volume of step abutment, the reducible 42% of reinforcing bar quantity, the reducible 25% of pile foundation radical, the reducible 52% of excavation earth stone square volume, excavation area reduces, also can reduce the domatic safeguard measure quantity of foundation ditch excavation. To sum up, the utility model discloses traditional rectangle abutment is compared to stepped abutment has apparent economic nature and security. For other bridge abutments with different structural dimensions, the above analysis can be referred to for economic benefits.

The above is only used for illustration the utility model relates to a some principles of step abutment suitable for abrupt slope topography not will the utility model discloses limit to show with concrete structure and application scope in, so all corresponding modifications and equivalents that probably are utilized all belong to the utility model discloses the patent scope of applying for.

Claims

1. The utility model provides a step abutment suitable for abrupt slope topography, includes cushion cap (10), platform body (11) and pile foundation (20), pile foundation (20) are vertical and horizontal interval setting under cushion cap (10), and pile foundation (20) upper end concreties with cushion cap (10), and platform body (11) set up on the cushion cap top surface and concreties as an organic wholely with it, characterized by: the bottom of the platform body (11) is in a step shape at the side of the platform back leaning on the steep slope terrain, and is embedded and supported on the step-shaped slope surface.

2. A stepped abutment suitable for use on steep slope terrain as claimed in claim 1, wherein: abutment front wall (12) is arranged on the front side of abutment body (11) on the top surface of bearing platform (10), abutment top cap (13) is arranged on the top of abutment front wall (12), abutment front wall (12) is connected with bearing platform (10) and abutment body (11) into a whole, and abutment top cap (13) is connected with abutment front wall (12) and abutment body (11) into a whole.