Method and device for underpinning antifriction separator for shallow underground space construction

Abstract

The invention provides a method for underpinning an antifriction separator for shallow underground space construction. The method comprises the following steps that: firstly, the antifriction separator and a supporting tube are arranged on jacking construction equipment; secondly, when the construction equipment is jacked in, the antifriction separator and the supporting tube are driven to the right position gradually; thirdly, a fixing device is used for fixing the antifriction separator; fourthly, the jacked equipment exits; finally, a prefabrication structure is jacked from a start working well by a synchronous jack so as to underpin the supporting tube in underpinning space under the antifriction separator. The invention also discloses an antifriction separator underpinning device for the shallow underground space construction, comprising the antifriction separator, the supporting tube and the fixing device, wherein the antifriction separator separates an upper overburden layer from the top surface of the supporting tube; and the antifriction separator is fixed on a space enclosing structure through the fixing device. The device and the method solve the problem of earthback pressure effect generated by rectangular jacking method and box culvert jacking method in underground space construction, can smoothly complete construction under a condition that earth covering is hardly disturbed, thereby achieving the aims of protecting periphery environment, reducing measurement cost and reducing the whole working period.

Description

technical field [0001] The invention belongs to the supporting construction method and device of the rectangular pipe jacking method and the box culvert jacking method of underground space engineering, and relates to flexible reinforcement and underpinning methods of building foundations. Background technique [0002] Modern underground space construction has expanded to many fields including three-dimensional transportation and urban underground space utilization. When constructing shallow soil-covered tunnels passing through highways, railways, and urban underground pipelines, if the open-cut method is used, temporary or permanent rerouting of roads and pipelines will be required, which will lead to a sharp increase in the comprehensive cost of engineering construction. If the pipe jacking method and the box culvert method are used for construction, these methods will greatly disturb the soil layer, and it is difficult to solve the soil damage caused by the back-soil effec...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the technical problem to be solved by the present invention is to provide a low-cost, convenient construction and easy-to-control anti-friction diaphragm underpinning method and

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