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Construction method for foundation pit in Larson steel sheet pile retaining and protecting river

A technology of Larsen steel sheet piles and construction methods, which is applied in the direction of foundation structure engineering, excavation, construction, etc., and can solve problems such as cost increase

Active Publication Date: 2012-07-18
浙江国丰建设有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the cost of foundation pit support in the weir greatly increased the cost of the project

Method used

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  • Construction method for foundation pit in Larson steel sheet pile retaining and protecting river
  • Construction method for foundation pit in Larson steel sheet pile retaining and protecting river

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0063] Embodiment: The Larsen steel sheet pile supporting foundation pit construction method in this example is characterized in that the construction method includes:

[0064] A. Construction preparation:

[0065] a. Finishing of steel sheet piles: Larsen steel sheet piles of the same type should be used, and the lock of Larsen steel sheet piles should be checked before construction. A 1.5-2.0m long steel sheet pile that meets the type and specification is used as a standard for the lock check. The steel sheet piles used for the lock pass the inspection. The inspection is to use a winch or hoist to pull the standard steel sheet pile flat car from the pile head to the pile tail. Any steel sheet piles that are bent, damaged, or the locks do not fit should be repaired according to the specific conditions. Use cold bending, hot knocking at a temperature not exceeding 800-1000°C, welding, riveting, cutting or lengthening; if the length of the Larsen steel sheet pile is not enoug...

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Abstract

The invention relates to a construction method for a foundation pit in a river, in particular to the construction method for the foundation pit in a Larson steel sheet pile retaining and protecting river. The construction method mainly solves the technical problems that according to the prior art, when the foundation pit in the river is excavated, firstly a cofferdam needs to be constructed, but the construction cost of the cofferdam is higher and the cost for retaining and protecting the foundation pit in the cofferdam weir is higher. The construction method comprises the following steps of carrying out construction calculation and construction preparation, internally supporting a first layer, inserting and piling steel sheet piles, pumping, carrying out earth cutting, internally supporting a second layer, carrying out earth cutting, internally supporting a third layer, sealing the bottom, constructing a bearing platform, and dismantling the internal support and removing the steel sheet piles.

Description

technical field [0001] The invention relates to a construction method for foundation pits in river courses, in particular to a construction method for foundation pits in river courses supported by Larsen steel sheet piles. Background technique [0002] At present, when bridges or other buildings are built on the river, because there is water in Hanoi, the excavation of foundation pits in Hanoi usually adopts the construction of cofferdams first, and then supports the foundation pits in the cofferdams. When the water depth is large, double-layer steel sheet pile cofferdams are generally used. The double-layer steel sheet pile cofferdam is to fill a certain thickness of cohesive soil between the two layers of steel sheet piles, and use the weight of the cofferdam itself to balance the effect of the external water pressure. When the water depth is large, in order to ensure the stability of the cofferdam, the thickness of the fill is relatively large, so the cost of the cofferd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
Inventor 汪强沈建良俞文钧孙炎云鲍校贤
Owner 浙江国丰建设有限公司
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