Bridge foundation protection structure for abrupt slope terrain and construction method

A technology for protecting structures and topography, which is applied in the direction of foundation structure engineering, underwater structures, bridges, etc., and can solve problems such as difficulty in reinforcement and protection of excavated slopes, low efficiency, and high risk of reinforced pile well construction

Pending Publication Date: 2021-07-06
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Steep slope terrain is distributed in a large number of mountainous areas. When the bridge pier foundation is set on steep slope terrain, the current common practice is to excavate the construction platform on the steep slope terrain, and carry out bridge pile foundation and cap construction on the construction platform. In order to avoid steep slope The terrain has the problem of deformation and rigidity control of the high pile cap of the bridge. Usually, the bridge pile foundation and the cap are buried in the natural slope body, which forms a large number of high slopes excavated by the foundation of the bridge pier. Due

Method used

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  • Bridge foundation protection structure for abrupt slope terrain and construction method
  • Bridge foundation protection structure for abrupt slope terrain and construction method
  • Bridge foundation protection structure for abrupt slope terrain and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1-Figure 3 As shown, a bridge foundation protection structure on steep slope terrain includes a wall structure 1, an anchor structure 2, lightweight concrete 3, a bridge pile foundation 4 and a bridge cap 5.

[0043] The enclosure wall structure 1 includes three interconnected walls, and the three walls form a channel structure. The enclosure wall structure 1 is arranged on the side slope 6 around the foundation of the bridge abutment. The enclosure wall structure 1 is provided with a step 11 , and the enclosure wall structure 1 is fixedly connected to the side slope 6 through the step 11 .

[0044] The anchor structure 2 includes a first anchor structure 21 and a second anchor structure 22 .

[0045] The first anchoring structure 21 is vertically arranged along the wall direction of the three walls of the enclosure structure 1, and the two ends of the first anchoring structure 21 are respectively anchored and fixed to the bottom surface and the bottom s...

Embodiment 2

[0051] A method for constructing a bridge foundation protective structure on steep slope terrain, comprising the following steps:

[0052] Step 1: Carry out planar positioning of the enclosure wall structure 1 on the side slope 6, and excavate and construct a small platform between the enclosure wall structure 1 and the side slope 6.

[0053] Step 2: Position the anchoring structure 2 on the plane and front view, construct the anchoring structure 2, one end of the anchoring structure 2 is anchored to the slope 6, and the other end of the anchoring structure 2 is exposed for 1m-3m. When the anchor structure 2 is an anchor rod, the anchor rod is reinforced by grouting; when the anchor structure 2 is an anchor cable, the anchor cable is reinforced by grouting, and the anchor cable structure is tensioned on the slope according to the design tension value. Pull to lock.

[0054] Step 3: Binding the reinforcement cage of the enclosure wall structure 1, and fixedly connecting the ex...

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Abstract

The invention discloses an abrupt slope terrain bridge foundation protection structure and a construction method, and the abrupt slope terrain bridge foundation protection structure comprises an enclosing wall structural body which is arranged on a side slope around a bridge pier and abutment foundation; anchoring structural bodies which are arranged at intervals in the wall surface direction of the enclosing wall structural body, and the two ends of each anchoring structural body are anchored and fixed to the enclosing wall structural body and the side slope correspondingly; lightweight concrete which is arranged in a three-dimensional space formed by the enclosing wall structural body and the side slope; a bridge pile foundation which penetrates through the lightweight concrete, and the lower portion of the bridge pile foundation enters the slope stable area; and a bridge bearing platform which is arranged at the top of the bridge pile foundation and fixedly connected with the bridge pile foundation. The construction platform formed by the enclosing wall structural body and the lightweight concrete is arranged on the side slope of the abrupt slope terrain, so that the problem that the bridge pile foundation and the bearing platform are difficult to construct is solved, and the problems that a high side slope needs to be reinforced and excavated when the bridge foundation construction platform is built through slope cutting and the engineering investment is high are solved; the problems of insufficient rigidity and difficult deformation control caused by a traditional high pile foundation bearing platform of a bridge are solved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a protective structure and construction method for a bridge foundation on steep slope terrain. Background technique [0002] Steep slope terrain is distributed in a large number of mountainous areas. When the bridge pier foundation is set on steep slope terrain, the current common practice is to excavate the construction platform on the steep slope terrain, and carry out bridge pile foundation and cap construction on the construction platform. In order to avoid steep slope The terrain has the problem of deformation and rigidity control of the high pile cap of the bridge. Usually, the bridge pile foundation and the cap are buried in the natural slope body, which forms a large number of high slopes excavated by the foundation of the bridge pier. Due to the influence of the steep slope terrain , It is very difficult to strengthen and protect the slope by excavation, and t...

Claims

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Application Information

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IPC IPC(8): E01D19/02E02D27/12E02D27/42E02D5/74E02D27/14E02D3/00E02D29/02E02D15/02E01D21/00
CPCE01D19/02E02D27/12E02D27/42E02D5/74E02D27/14E02D3/00E02D29/02E02D15/02E01D21/00
Inventor 姚裕春刘昕王晓刚陈雅婷罗亮亮郭建宁刘晋南钱昊黎伟刘浪奇张耀
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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