Shield counter force device and shield initial operation method

Abstract

The invention is suitable for the technical field of underground projects and provides a shield counter force device and a shield initial operation method. The shield counter force device comprises asupporting frame, a steel ring, a plurality of counter force pieces and a benchmark ring, wherein the steel ring is fixedly installed on the supporting frame; one end of each counter force piece is obliquely inserted into surrounding rock of an underground excavation section tunnel, and the other end of each counter force piece is fixedly connected with the steel ring; and the benchmark ring is arranged to be coaxial with the steel ring and is fixedly connected with the steel ring, and the benchmark ring is used for transmitting reaction thrust to a shield tunneling machine through negative annular tube segments. In the tunneling direction of the underground excavation section tunnel, the positions where the counter force pieces are inserted are located in front of the steel ring, and thecounter force pieces are connected to the steel ring and are evenly distributed along the periphery of the steel ring. In the shield counter force device and the shield initial operation method, the shield counter force device can provide stable reaction thrust to the tunneling machine. Besides, damage to a lining structure in an underground excavation station can be avoided, the safety of the structure of the underground excavation station is improved, the social and economic benefits are remarkable, and the development prospects are wide.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to a shield counter force device and a shield starting operation method. Background technique [0002] Shield construction is widely used in the construction of urban rail transit underground interval tunnels due to its mature technology, safety, rapidity, no need for precipitation, small impact on the surrounding environment, and excellent quality of formed tunnels. With the in-depth development of urban rail transit construction, in recent years, deep-buried underground excavation stations in newly-built urban rail transit have emerged continuously, which has led to the use of underground excavation stations as shield starting or receiving sites, and then using shield tunneling for interval tunneling The "underground excavation + shield" combined construction method. [0003] In this construction method, the ventilation shaft of the underground excavat...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a shield counter force device and a shield starting operation method to solve the problem of damaging the lining structure of the station when the counter force frame is erected, causing hidden dangers in the quality of the waterproof structure and increasing the safety risk of the station structure question

Images