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Near-shore area three-sided combined cofferdam

A side combination and area technology, which is applied in the field of trilateral combined cofferdams in near-shore areas, can solve the problems of unguaranteed waterproofing and stability, difficult construction of steel sheet pile cofferdams, etc., and achieve the effect of improving waterproofness and stability.

Inactive Publication Date: 2018-05-08
NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a three-sided combined cofferdam in the nearshore area, which aims to solve the difficulties in the construction of conventional steel sheet pile cofferdams in complex geological environments with large inclination angles near the shore, semi-bare rocks, and covering layers ranging from shallow to deep. Problems such as waterproof and stability cannot be guaranteed

Method used

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  • Near-shore area three-sided combined cofferdam
  • Near-shore area three-sided combined cofferdam

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a three-side combined cofferdam in the nearshore area, which is obtained through the following method of construction, and the method includes the following steps:

[0026] S1: Install two rows of parallel outer steel pipe piles 5' on the bedrock, and install inner steel pipe piles 5 on the bedrock and the bottom cover layer of the riverbed, and the inner steel pipe piles 5 form a "U" shape with openings facing the bedrock arrangement;

[0027] S2: Set beam supports 6 on the outer steel pipe piles 5′ and inner steel pipe piles 5, respectively set inner guide frames 7 on the beam supports 6 outside each row of inner steel pipe piles 5, A "U"-shaped outer guide frame 7' is set between the outer steel pipe pile 5' and the inner steel pipe pile 5 on the girder 6, and the height of the girder 6 is higher than the height of the bottom cover concrete 4 to be poured;

[0028] S3: insert and drive steel sheet piles along the inner guide frame 7 between ...

Embodiment 2

[0038] This embodiment provides a three-side combined cofferdam structure in the nearshore area, such as figure 1 or 2, including:

[0039] Two vertical cofferdams far away from the bank and a cofferdam along the river connecting the two vertical cofferdams parallel to the bank; The shallow buried area is embedded with concrete wall steel sheet pile 2, the shallow buried area steel sheet pile 2' inserted into the river bed bottom covering layer, and the cofferdam along the river is the deep buried area steel sheet pile 3 inserted into the river bed bottom covering layer, and the bottom of the cofferdam is sealed Concrete 4;

[0040] In the shallow buried area, there are several outer steel pipe piles 5 arranged side by side on the outer side of the steel sheet pile 2 embedded in the concrete wall. In the shallow buried area, the steel sheet pile 2 is embedded in the concrete wall, and the steel sheet pile 2' in the shallow buried area is inserted along and through the outer ...

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Abstract

The invention discloses a near-shore area three-sided combined cofferdam. The three-sided combined cofferdam has the advantages that the problems that the stability and the waterproof performance of the cofferdam are poor due to the fact that the construction of an existing near-shore area cofferdam is limited by tide water and complex geologies, and the depth of the part, inserted into a rock, ofa shallow-buried area steel sheet pile on the large inclined hard rock surface is insufficient due to the inserting and piling difficulties can be effectively solved; and a concrete and steel sheet pile construction method is specifically used at the joint of the large inclined semi-bare rock and a silt covering layer so that the water resistance and the stability of the whole cofferdam can be greatly improved, the construction progress of the underwater structure can be effectively accelerated, and the cost can be saved.

Description

Technical field: [0001] The invention relates to the field of underwater structure construction, in particular to a three-side combined cofferdam in the near-shore area. Background technique: [0002] With the continuous development of China's infrastructure construction, cofferdam construction is widely used in the construction of bridges, ports and wharves as temporary structures for underwater structures. Among them, steel sheet pile cofferdams are easy to construct, strong in plasticity, and good in waterproof performance. commonly used. [0003] When the water flow in the construction water area is turbulent, the tidal height difference is large, the construction area is near the coast, and there are semi-bare rocks with a large inclination angle, and the overburden layer ranges from shallow to deep. Bare rocks lead to difficulties in drilling and insufficient depth of penetration into the soil, resulting in poor water resistance and stability at the junction of the ro...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 罗浩陈千书丁延书包士淳张浩军
Owner NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG
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