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Double-rowed cofferdam and method for manufacturing the same

A manufacturing method and technology of cofferdams, which are applied in construction, sheet pile walls, foundation structure engineering, etc., can solve problems such as small rigidity, large deformation, and difficulty in ensuring water-stopping effects at interfaces, and achieve good water-stopping performance, reasonable cost, and The effect of convenient construction

Active Publication Date: 2006-09-27
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel pipe piles are very rigid and can be used as a support structure for foundation pits, but the water-stop effect at the interface is difficult to guarantee; steel sheet piles have the advantages of stable material, reliable quality, and fast construction speed in weak soil layers. It is simple and has good water-retaining properties. As a temporary structure, the steel sheet pile can be pulled out and reused, which reduces the cost of the project. However, it has the disadvantages of low rigidity and large deformation under the action of lateral pressure.
More important foundation pit projects generally have relatively strict requirements on the lateral deformation of the enclosure structure. In this case, the steel sheet piles lack applicability.

Method used

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  • Double-rowed cofferdam and method for manufacturing the same
  • Double-rowed cofferdam and method for manufacturing the same

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] In the figure, 1 is a steel pipe pile cofferdam, 2 is a steel sheet pile cofferdam, 3 is a water stop curtain, 4 is a river bed, and 5 is a foundation pit.

[0012] A double-row cofferdam, which includes a row of steel pipe pile cofferdams 1, is characterized in that a row of steel sheet pile cofferdams 2 are arranged outside the steel pipe pile cofferdams 1, and earthwork backfill is carried out between the two rows of cofferdams, And carry out reinforcement, form water-stop curtain 3. The form of reinforcement can be rotary spraying or grouting reinforcement to form a water-stop curtain. The distance between the steel pipe pile cofferdam 1 and the steel sheet pile cofferdam 2 is between 0.5m and 2.5m. Among them, the steel pipe pile cofferdam calculates its pile sinking depth according to the design of the foundation pit enclosure structure. ...

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Abstract

The invention relates to a dual-row cofferdam and relative method, which is characterized in that: a row of steel plate post cofferdam is arranged at the outer side of steel tube post cofferdam, and a earthwork filling is processed between two rows, and it strengthens them to form the waterproof curtain. The invention utilizes the large rigidity of steel tube post and the better waterproof property of steel plate post to combine them, with lower cost and simple process.

Description

Technical field: [0001] The invention relates to a large-scale civil construction material for the water-stop enclosure of foundation pits during construction in water, in particular to a double-row cofferdam and a manufacturing method thereof. Background technique: [0002] For the excavation of foundation pits in water, there should be safe foundation pit protection, that is, cofferdams should be built around the foundation pits to facilitate drainage, foundation excavation and masonry foundation construction. The cofferdam project should mainly consider the requirements of stability and anti-seepage. The commonly used types of cofferdams are: soil cofferdam, straw bag cofferdam, wooden sheet pile cofferdam, steel cofferdam and steel concrete cofferdam, etc. For foundation pit projects with high safety levels constructed in deep water, the requirements for the stability and anti-seepage of cofferdams are relatively strict. Steel cofferdams are widely used in engineering ...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D5/04E02D7/00
Inventor 王海燕
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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