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A cofferdam construction method

A construction method and technology for cofferdams, which are applied in infrastructure engineering, construction, etc., can solve problems such as water leakage and sealing of cofferdams, and achieve the effects of improving sealing performance, improving observation performance, and improving safety and stability.

Active Publication Date: 2019-03-19
杭州天顺市政环境建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Common deep-water foundation cofferdams mainly include steel sheet pile cofferdams, locking steel pipe pile cofferdams, double-wall steel cofferdams, etc. Steel sheet pile cofferdams are the most commonly used sheet pile cofferdams, which have high strength and are easy to drive into Hard soil layer; however, the cofferdam buildings are in water or soft mud, which is easy to cause the cofferdam to leak or have low sealing, and the cofferdam needs strong structural strength to ensure the water pressure resistance of the cofferdam

Method used

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Embodiment Construction

[0045] A kind of cofferdam construction method is described further below.

[0046] A cofferdam construction method, comprising the following steps:

[0047] S1. Pre-construction preparations: first conduct on-site surveys to understand the site environment, geology and underwater conditions, and then work out the locations of the cofferdams and diversion channels according to the drawings.

[0048] S2. Site cleaning: Draw the general layout of the construction and determine the excavation route, base elevation, slope slope and earthwork stacking location, and remove all obstacles, trees and weeds in the excavation area.

[0049] S3. Cofferdam setting-out: locate the cofferdam, and release the position from the beginning to the end of the cofferdam according to the layout plan, and measure the fill elevation with a spirit level during the filling process.

[0050] S4. Driving wooden piles: When purchasing wooden piles, choose high-quality wood. The wooden piles are 6 meters l...

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Abstract

The invention discloses a cofferdam construction method which comprises the following steps: pre-construction preparation, site clearing, cofferdam setting-out, timber pile driving, jettey building, cofferdam body filling, cofferdam protective treatment, cofferdam post-completion clearing, post-construction detection and earthwork backfilling control. The cofferdam construction method has the benefits as follows: the compacting effect is good, the waterproof effect of the cofferdam is improved, emergency measures are conveniently and timely taken once problems are found, and the construction quality and safety of the cofferdam are improved.

Description

technical field [0001] The invention relates to the technical field of water conservancy construction, more specifically, it relates to a cofferdam construction method. Background technique [0002] Cofferdam refers to the temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy projects. , to build buildings; generally used in hydraulic construction, except as a part of the formal building, the cofferdam is generally removed after use, and the height of the cofferdam is higher than the highest water level that may occur during the construction period; the role of the cofferdam It can not only waterproof and surround water, but also support the pit wall of the foundation pit. [0003] Common deep-water foundation cofferdams mainly include steel sheet pile cofferdams, locking steel pipe pile cofferdams, double-wall steel cofferdams, etc. Steel sheet pile cofferdams are the most commonly used s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 占晓华张梁周宗富
Owner 杭州天顺市政环境建设有限公司
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