Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space

Abstract

The invention relates to the technical field of tunnel shield construction and particularly provides a shield receiving forward-shift construction method of a boulder group open excavation and embedment mutation space. The problem that a shield cannot be normally received and hoisted out by shifting forward to a station by using the traditional method in conventional construction can be solved. The shield receiving forward-shift construction method comprises the following steps of: digging a boulder group open excavation and embedment section; forming a transition curve by a refilled receiving well as a large-slope curve with the open excavation and embedment section, and receiving and shifting forward the shield with the large-slope curve; and shifting forward the entire shield in the open excavation and embedment section, paving a back-up transition rail bar and a transition guide rail on the large-slope curve, shifting forward the entire shield by using a movable counter-force device and an oil cylinder of a shield machine, and shifting forward and respectively paving a forward-shift guide rail and a back-up forward-shift guide rail of a shield body on the open excavation and embedment section simultaneously. With the adoption of the shield receiving forward-shift construction method provided by the invention, the section tunneling mission is smoothly completed by the shield; a curve shield receiving process is started; and a technology of forward shifting the entire machine when the shield is backed up without the rail bar is innovated. The shield receiving forward-shift construction method has the advantages of simple process, low construction cost, flexible construction method and the like.

Description

Technical field [0001] The present invention involves the field of tunnel shield construction technology, and is specifically for a solitary stone group to dug and dark burial space shields to receive front -move construction methods. Background technique [0002] With the rapid development of urban rail transit, most of the south and seaside cities have also begun to build subways. However, the biggest difficulty of building subway in these places is that there are a large number of lone stones in the interval.Shield construction is facing the risk of shield damage. [0003] However, in order to ensure the safety of construction, the construction of light digging and dark buried construction in a section of the lone stone group in the station. In order to reduce the investment, the bottom plate of the open -stubborn section is 1.6 meters higher than that of the shield.The short, which makes the shield unable to receive and move forward normally. The existing construction method ...

AI Technical Summary

Problems solved by technology

[0018] In order to solve the problem that the traditional method cannot be used to receive the shield normally and move it forward to the station for hoisting out when encountering the shield tunnel construction in the open-cut and buried mutation space of the boulder group, the present invention provides an open-cut and buried mutation space for the boulder group Construction method of shield receiving and moving forward

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