Technology for disassembling negative rings of TBM (tunnel boring machine) arrival hole

Abstract

The invention relates to a technology for disassembling negative rings of a TBM (tunnel boring machine) arrival hole. The technology is characterized in that firstly a set of complete negative ring disassembling and hoisting equipment is assembled, and is welded to form a steel bracket which is provided with a hoisting point; one steel rope is sequentially connected with a storage battery car outside the hole, penetrates through the hoisting point, and is used for hoisting pipe pieces through a hoisting bolt; a pulley inside the hole is fixed to the top of each of the pipe pieces through bolts; one end of another steel rope is connected with a storage battery car inside the hole and then goes around the pulley inside the hole, and the other end of the steel rope is used for hoisting the pipe pieces through hoisting bolts. The negative rings are disassembled through the following steps of (1) disassembling steel shotcrete; (2) assembling the hoisting equipment; (3) disassembling a reaction frame; (4) mounting the pulley inside the hole; and (5) disassembling the negative rings, wherein the negative rings are disassembled in a manner that the pipe pieces are separately disassembled, F pipe pieces and adjacent pipe pieces are disassembled at the same time, and the negative rings are disassembled in the disassembling sequence that the pipe pieces are sequentially and symmetrically disassembled from top to bottom. According to the technology disclosed by the invention, the pipe pieces are protected from being damaged in the disassembling process, so that the cyclic utilization number of times of the pipe pieces of the negative rings is increased; original construction machines and tools and original materials are utilized, the investment on the equipment and the materials is reduced, and the utilization rate of the negative rings is increased.

Description

technical field [0001] With the vigorous development of urban rail transit in my country, single-shield TBM, as an important equipment for subway construction in rail transit projects, will be used more and more widely. Negative ring segment demolition is a risky construction operation. The maturity of the negative ring demolition process in the starting tunnel will determine whether the negative ring demolition operation is safe, economical and efficient. Background technique [0002] Negative ring segment removal is one of the important procedures in tunnel shield construction. When the shield starts, the reaction frame provides reaction force at the rear end of the shield machine, and an annular segment is installed between the reaction frame and the shield jack to give the shield machine a driving force. Force until the shield tail of the shield machine enters the hole on the other side of the well wall, and the negative ring segment can be removed at this time. The na...

AI Technical Summary

Problems solved by technology

The narrow working space and poor environment will bring certain difficulties to the removal of the negative ring segment. The negative ring removal process of the underground excavation station is relatively more complicated than that of the open excavation station.

[0003] In Chongqing Rail Transit Loop Upper Bridge Station, Fengmingshan Station and Interval Tunnel Project, the construction environment at the departure stage of Shangqiao Station is poor, there is no available lifting point on the vault of the departure tunnel, and the distance between the 7th Ring Negative Ring Segment and the surrounding rock wall is relatively large. Large, limited hoisting and lifting equipment, rails, water pipes, lighting lines, cables, etc. pass through the segment, and the construction process is cumbersome and takes a long time

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