Double-layer steel sheet pile soil core composite cofferdam structure without inner support and application thereof

A technology of combining cofferdams and steel sheet piles, applied in infrastructure engineering, construction, etc., can solve problems such as instability and damage, water seepage, and large deformation of steel sheet piles, so as to enhance stability, improve impermeability, and improve overall stability. Effects of Sex and Safety
CN103669375AInactive Publication Date: 2014-03-26张安政
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
张安政
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a double-layer steel sheet pile soil core composite cofferdam structure without an inner support and the application of the double-layer steel sheet pile soil core composite cofferdam structure without an inner support, and belongs to the field of water conservancy projects. The double-layer steel sheet pile soil core composite cofferdam structure without an inner support comprises an upstream-face steel sheet pile and a downstream-face steel sheet pile, and the space between the steel sheet piles is filled with cohesive soil to form a cofferdam; a composite geo-membrane is laid on the portion, inside the cofferdam, of the upstream-face steel sheet pile; the upper portions of the two steel sheet piles are connected through a pull rod, middle beams are arranged outside the steel sheet piles, and the pull rod is connected with the middle beams through bolts arranged outside the corresponding middle beams. When the filling cofferdam core cohesive soil is in the same level with the pull rod, the space between the steel sheet piles is further filled with a layer of hairy residues, and a sub-cofferdam is arranged on the upstream-face steel sheet pile. The cofferdam structure can be used for building strip-shaped subsurface structures in a river or lake through the open-cut method. The cofferdam structure is stable and safe, and the problem that a steel sheet pile flexible structure is large in deformation is solved by arranging the pull rod on the tops of the two steel sheet piles; a three-level waterproofing system improves the anti-penetrability performance of the steel sheet pile cofferdam significantly.
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Description

[0001] technical field

[0002] The invention belongs to the field of water conservancy project construction, and relates to a composite cofferdam structure of double-layer steel sheet pile soil core without internal support and an application thereof. Background technique

[0003] At present, steel sheet piles have a wide range of application examples in our country: steel sheet piles can be used in deep water wharfs, especially for dock walls and ship lock walls with impermeable requirements; in embankment projects, steel sheet piles can be used for anti-seepage walls The project is a semi-closed or fully closed anti-seepage system formed by steel sheet piles, a relatively impermeable layer under the permeable layer of the embankment foundation, a geomembrane, and an overlying soil layer; in deep foundation pit projects, steel sheet piles form enclosure walls, It has good soil retaining and anti-seepage properties, good integrity, and has the characteristics of high stren...

Claims

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