Mechanical shaft-forming method of shield cutterhead maintenance shaft in tunnel and underground construction

Abstract

The invention relates to the technical field of shaft construction, and discloses a mechanical shaft-forming method of a shield cutterhead maintenance shaft in a tunnel and an underground construction. First, a position where a cutterhead needs maintenance in a shield tunnel is marked, and grouting reinforcement is conducted in a reinforcing range of bored cast-in place piles; then glass fiber cast-in-place piles (1) are adopted on a reinforcing range of the shield tunnel with the position of a pre-stop machine as the center; a cast-in-place pile (2) is constructed between pile groups on the tunnel axis (3) of a shield (6), then the shield cutterhead maintenance shaft (8) is formed by drilling of a hollow hole (4) in the middle of the cast-in-place pile (2) by a rotary-drill, and a steel pile casing is pre-buried at the mouth of the shield cutterhead maintenance shaft; then compensation grouting is conducted on a soil body stratum between the pile groups, finally a covered beam (9) is constructed on the top of the cast-in-place pile, and all the piles are connected in an integrated mode. The mechanical shaft-forming method of the shield cutterhead maintenance shaft in the tunnel and the underground construction is convenient to construct, rapid, safe, and capable of greatly reducing the number of excavation constructions, shortening a construction period and reducing construction cost and construction risks, and achieves the purpose that operation space is provided for shield cutterheads and shield cutters.

Description

technical field [0001] The invention relates to the technical field of shaft construction, and mainly relates to a method for mechanically forming a shield cutter head maintenance shaft in tunnels and underground engineering. Background technique [0002] In the urban underground railway tunnels and subway projects constructed by the shield method, due to the long-distance excavation of the shield machine, the poor adaptability of the cutterhead cutter and engineering geological conditions, etc., the cutterhead cutter is often worn and damaged seriously, so it is often necessary to install As a working shaft, the transformation and repair of the cutter head of the shield tunneling machine. To ensure the smooth progress of the project. [0003] At present, the traditional working shaft construction method adopted at home and abroad, the construction site is large, the construction process is complicated, and often requires construction dewatering, pipeline relocation, long-t...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional working shaft construction method adopted at home and abroad, the construction site is large, the construction process is complicated, and often requires construction dewatering, pipeline relocation, long-term traffic diversion and other work, which greatly increases the construction cost and construction period. In addition, the traditional shaft The construction adopts manual excavation and is often accompanied by water-carrying operations. The construction site is surrounded by buildings, and the construction safety risk is very high.

Images