Steel plate pile and earth dam combined cofferdam and cofferdam construction method

A technology of combining cofferdams and steel sheet piles, applied in sheet pile walls, infrastructure engineering, construction, etc., can solve problems such as thin river bed covering, and achieve the effects of improving impermeability, waterproofing, and increasing cofferdam gravity.

Pending Publication Date: 2020-08-14
中铁二局第二工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is still the difficulty that the river bed covering layer is thin, and the steel sheet piles cannot be driven into the river bed to form a sufficient anchorage depth.

Method used

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  • Steel plate pile and earth dam combined cofferdam and cofferdam construction method
  • Steel plate pile and earth dam combined cofferdam and cofferdam construction method
  • Steel plate pile and earth dam combined cofferdam and cofferdam construction method

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Effect test

Embodiment 1

[0040] Please refer to Figure 1 to Figure 4 , Figure 1 to Figure 4 Provided is a combined cofferdam of a steel sheet pile and an earth dam.

[0041] The object of the present invention is to provide a combined cofferdam of steel sheet piles and earth dams, which can limit the slope of the earth dam cofferdam and the width of the occupied river, control the scope of cofferdam construction work, improve the water resistance and anti-seepage capabilities of the cofferdam, and the cofferdam The overall stability is strong. It is suitable for shoals where the construction scope is limited, the riverbed cover is thin, and the steel sheet piles cannot be driven into the riverbed to form sufficient anchorage depth, the water depth is 3-5m, and the flow velocity is 1-3m / s.

[0042] Embodiments of the invention are achieved through the following technical solutions:

[0043] Please refer to Figure 1 to Figure 3 , a combined cofferdam of steel sheet piles and earth dams, comprisin...

Embodiment 2

[0058] Please refer to Figure 5 , the present embodiment provides a 500 cofferdam construction method of a gently inclined bedrock river bed with less overlying soil layer, which can include the following steps:

[0059] a. Determine the scope of the island construction, and fill the dregs on the shore side to form a passage to the island. The outer edge of the island surface is wider than the position of the inner steel sheet pile 100 and the island surface is higher than the construction water surface;

[0060] b. The rotary drilling rig equipment enters the site and constructs the positioning piles of the outer steel sheet pile 200. After the hole is formed, concrete is poured to the island surface, and the pre-embedded steel is used as the positioning and reinforcement pile of the outer steel sheet pile 200 cofferdam;

[0061] c. The rotary drilling rig is removed from the site, and the piling machine goes to the island to insert and drive 200 outer layer steel sheet pile...

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Abstract

The invention relates to the technical field of bridge engineering construction and provides a steel plate pile and earth dam combined cofferdam which comprises an inner-layer steel plate pile, an outer-layer steel plate pile, and an earth dam filling area defined by the inner-layer steel plate pile and the outer-layer steel plate pile. According to the steel plate pile and earth dam combined cofferdam, the step-slope and the occupied river channel width of the earth dam cofferdam can be limited, the cofferdam construction operating range can be controlled, the water blocking area of the cofferdam is reduced, the impervious capacity is improved, and the overall stability of the cofferdam is high.

Description

technical field [0001] The invention relates to the technical field of bridge engineering construction, in particular to a cofferdam combined with a steel sheet pile and an earth dam and a cofferdam construction method. Background technique [0002] At present, cofferdams for wading bridge piers include soil cofferdams, soil bag cofferdams, steel sheet pile cofferdams, steel cofferdams, and reinforced concrete caisson cofferdams. Different types of cofferdams have different trial conditions. [0003] During the construction of the pier foundation of the Conghua Bridge in the urban area of ​​Conghua, because it crosses the Liuxi River, a drinking water source protection river in Guangzhou, the river management department and the environmental supervision department have put forward specific requirements for the construction of the pier foundation for wading bridges, including restrictions on island building Within the scope of construction, it is strictly forbidden to build i...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D5/06
CPCE02D5/06E02D19/04
Inventor 辜文凯蒲凤平陈燕王华东黄书华李友明彭亮英刘日飞李凯
Owner 中铁二局第二工程有限公司
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