Device and method for constructing great depth rectangular or quasi-rectangular tunnel shield

Abstract

The invention relates to the technical field of underground engineering construction, and particularly relates to a device and a method for constructing a great depth rectangular or quasi-rectangular tunnel shield, mainly aiming at providing the great depth rectangular or quasi-rectangular tunnel shield which is applicable to a great-depth assembled mechanical construction for improving the safety reliability in the constructing process and accelerating the construction progress. The device mainly comprises a shield host, a back auxiliary and a model board trolley, wherein a combined rotating cutter is arranged at the front end face of the shield host, and a rectangular segment erector is arranged at the rear end of the shield host; a model board telescopic cylinder is connected on a supporting cantilever at the rear end part of the rectangular segment erector, and a model board is connected with and fixed at the other end of the model board telescopic cylinder; a grouting opening is reserved in the model board; and the model board trolley is arranged at the rear end of the back auxiliary. The construction device and method have remarkable economic benefits in underground space utilization and material utilization.

Description

technical field [0001] The invention relates to the technical field of underground engineering construction, in particular to a shield construction device and method for a large buried depth rectangular or quasi-rectangular tunnel. Background technique [0002] For tunnel engineering structures with large buried depths, circular or horseshoe-shaped sections are generally used. However, sometimes the space utilization rate of circular or horseshoe-shaped sections is low, such as for highway tunnels with large buried depths, the use of circular or horseshoe-shaped sections often results in a great waste of space, while the use of rectangular or quasi-rectangular sections is more economical and reasonable; Generally, tunnels with rectangular or quasi-rectangular sections are mostly constructed using the mining method, which has low work efficiency and high safety risks. However, the shield method can improve construction efficiency and reduce safety risks, but the lining struct...

AI Technical Summary

Problems solved by technology

However, sometimes the space utilization rate of circular or horseshoe-shaped sections is low, such as for highway tunnels with large buried depths, the use of circular or horseshoe-shaped sections often results in a great waste of space, while the use of rectangular or quasi-rectangular sections is more economical and reasonable; Generally, tunnels with rectangular or quasi-rectangular sections are mostly constructed using the mining method, which has low work efficiency and high safety risks. However, the shield method can improve construction efficiency and reduce safety risks, but the lining structure of the tunnel needs to be assembled in pieces. Rectangular or It is very difficult to assemble the sub-rectangular section segment with the conventional reinforced concrete structure, and the integrity of the assembly is poor, the structure is easy to lose stability, and the thickness of the reinforced concrete segment will be very large under the condition of large buried depth, which not only increases Increased the difficulty of construction, but also increased construction costs and safety risks

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