Energy-dissipating composite lining in front of tbm construction and its working method

Abstract

The invention provides a TBM construction front energy dissipation type combined lining. The TBM construction front energy dissipation type combined lining comprises a supporting system, an auxiliarysupporting system and a stress monitoring system. The supporting system comprises a plurality of arch frames, gratings, an anchoring structure and an electric control inflating and deflating system, and each arch frame is welded into an annular shape through a plurality of I-shaped steel units; every two adjacent arch frames are welded into a cylindrical steel frame structure through longitudinalconnecting ribs, and the gratings are welded outside the cylindrical steel frame structure; the auxiliary supporting system comprises an air bag which is made of a water-soluble film structure and wraps the gratings, and during operation, after the air bag is dissolved with water, concrete is sprayed to the gratings to form overall supporting surrounding rock; and the air bag comprises an inflation hole and an exhaust hole, the anchoring structure is used for connecting the air bag and the gratings, the electric control inflating and deflating system is used for controlling opening and closingof the inflation hole and the exhaust hole, and the stress monitoring system comprises a plurality of strain gauge groups arranged on the outer side of the air bag and a stress monitoring unit and isused for monitoring the contact stress of the air bag and the surrounding rock.

Description

Technical field[0001]The invention relates to the technical field of TBM tunnel construction equipment, in particular to a front energy dissipation type combined lining for TBM construction and an operation method thereof.Background technique[0002]With the continuous development of my country's economy, transportation problems have become increasingly apparent, and the requirements of highways and railways for tunnel construction continue to increase. TBM construction tunnels play a huge role in the construction of mountain tunnels, building a national transportation network, and improving the transportation environment due to their advantages such as fast excavation speed, short construction period, and high degree of mechanization. Lining construction is an important part of tunnel construction, and rapid and timely support has an important impact on the safe and efficient tunneling of TBM. Due to the limitation of the location of the support equipment on the TBM, the initial supp...

AI Technical Summary

Problems solved by technology

[0005] Based on the above-mentioned problems, the present invention provides a kind of energy-dissipating composite lining before TBM construction and its operation method, so as to alleviate the inability to carry out timely and effective primary support during construction in the prior art, which may cause large deformation of surrounding rock problems, which affect the construction quality, and the surrounding rock is further loosened, which leads to the risk of landslides; in high ground stress areas, due to the non-shrinkage of the lining structure, the deformation of the surrounding rock is restricted, and the lining structure bears a large ground stress load. The risk of damage will have a huge impact on subsequent tunnel construction, bearing capacity and waterproofing capacity during the operation phase and other technical issues

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