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Construction method for forming holes on soil nail wall by water punching

A construction method, the technology of soil nailing walls, applied in the direction of excavation, sheet pile walls, foundation structure engineering, etc., can solve problems such as technical intervals

Inactive Publication Date: 2012-03-28
北京建工一建工程建设有限公司
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  • Abstract
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Problems solved by technology

[0002] The soil nailing construction in the prior art is usually mechanical or artificial hole formation, the soil nailing is constructed after the hole is formed, and the spray anchor net is constructed at last; this construction procedure has technical intervals, and if the construction period is tight, it is urgent to carry out the excavation of the lower soil and deep During the construction of the foundation pit structure, its deficiencies appeared

Method used

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Embodiment Construction

[0014] The construction method of the present invention will be described below in conjunction with a specific construction case, at first the foundation pit excavation is carried out for the construction project, and the construction method of section and layered excavation is adopted; for avoiding the erosion and erosion of the slope soil mass by water flushing into holes To speed up the progress of earthwork excavation and other reasons, it is necessary to spray concrete on the slope layer by layer. Therefore, a layer of reinforcement mesh is immediately laid after each layer of earthwork is excavated. The reinforcement mesh? 8200 is arranged in two directions. After welding and laying, it needs to be checked and accepted by the supervisor.

[0015] Slope concrete spraying and anchoring is carried out before soil nailing to ensure the stability of the slope soil. Spray the slope concrete to the design thickness, which is 80mm for this project. The spraying adopts the dry s...

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Abstract

The invention relates to a construction method for forming holes on a soil nail wall by water punching. The construction method comprises the following steps of: firstly ejecting side slope concrete, then ejecting high-pressure water to form soil nail holes, inserting soil nail reinforcing bars or using slurry injection anchor pipe as soil nails, and then injecting slurry through slurry injection pipes or the slurry injection anchor pipes to finally form the soil nails. The method is suitable for powdery sand soil layers, fine-sand-mingled silty clay layers and other soil layers in which holes are easily formed by water punching, had the advantage of reducing technical interval of soil excavation, and is suitable for project which has short time limit and is in urgent need of lower-layer soil excavation and deep-foundation pit structure construction.

Description

technical field [0001] The invention relates to a construction method for forming holes by water flushing in soil nailing walls. Background technique [0002] The soil nailing construction in the prior art is usually mechanical or artificial hole formation, the soil nailing is constructed after the hole is formed, and the sprayed anchor net is constructed at last; there are technical intervals in this construction procedure, and if the construction period is tight, it is urgent to carry out the excavation of the lower soil and deep Its deficiency just appeared during foundation pit structure construction. Contents of the invention [0003] The construction technology of water flushing hole-forming of soil-nailing wall according to the invention has the advantages of fast hole-forming speed. The soil-nailing wall is made after spraying and anchoring on the slope, which reduces the technical interval of earthwork excavation, and is suitable for the tight construction period ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D17/20E02D5/76
Inventor 王海涛杨崇俭丁学芝龚燕兵应永望周春伟刘亮邹爱华杨素珍杨耀王妍
Owner 北京建工一建工程建设有限公司
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