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Foundation pit side-wall flexible support method

A foundation pit, flexible technology, applied in excavation, infrastructure engineering, water conservancy engineering and other directions, can solve the problems of long construction period, easy to collapse hole wall, high engineering cost, improve construction safety, ensure the quality of wall protection, construction short cycle effect

Inactive Publication Date: 2004-09-22
贾金青 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This construction method not only has a long construction period and high project cost, but also when encountering vertical hard rock formations, it is difficult for steel piles, reinforced concrete piles or cast-in-situ piles to reach the predetermined depth. If blasting is adopted, not only the cost will increase, but also it will be easy The hole wall collapses, and the foundation endangers the safety of the adjacent buildings of the foundation pit

Method used

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  • Foundation pit side-wall flexible support method
  • Foundation pit side-wall flexible support method
  • Foundation pit side-wall flexible support method

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Embodiment Construction

[0023] The method for flexible support of the side wall of the foundation pit proposed by the present invention firstly excavates 1-3 meters downward from the ground, opens a hole 1 towards the soil surface, and the aperture is 50-170mm; puts the anchor rod body 2 in the hole 1 , wherein the anchor body wraps plastic or plastic pipe 3 in the free section range, and then grouts 4 in the hole; forms the anchor free section 5 and the anchor section 6, and sets the retaining surface layer 7 on the surface of the foundation pit wall; The end of the anchor rod on the surface layer is provided with a carrier body 8, and the end of the anchor rod protrudes from the carrier body; prestress is applied to the anchor rod and locked with the anchor head 9; the above process is repeated until the base.

[0024] The retaining surface layer in the above method can be a concrete layer or a wood layer. The supporting body can be channel steel or I-beam, and its arrangement can be placed vertica...

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Abstract

The invention refers to a flexible-supporting and protecting method of inner wall of the base pit. At first dig, then make the hole toward the earth-facing surface, and place the anchor shaft in the hole, and then pour the plasm into the hole, and set the earth-stopping surface layer on the surface of basic pit wall, set the load bearing body on the anchor shaft on the earth-stopping surface layer, and the end of the anchor shaft reaches out of the load bearing body, and then exert the prestressing force on the anchor shaft and use the anchor to lock it, and then repeat the above course until to the fundus.

Description

technical field [0001] The invention relates to a flexible support method for the side wall of a foundation pit, which belongs to the technical field of foundation engineering, in particular to the support for the side wall of a foundation pit. Background technique [0002] The commonly used foundation pit support method in the existing foundation engineering is to first make steel piles, reinforced concrete prefabricated piles, reinforced concrete cast-in-situ piles or underground diaphragm walls for the foundation pit enclosure structure, and then excavate the foundation pit , when digging to the design depth of anchor bolt distribution, carry out anchor bolt construction to the side wall of the foundation pit. This construction method not only has a long construction period and high project cost, but also when encountering vertical hard rock formations, it is difficult for steel piles, reinforced concrete piles or cast-in-situ piles to reach the predetermined depth. If bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/80E02D17/04E02D29/02
Inventor 贾金青宋二祥
Owner 贾金青