Shield tunneling machine shield tail synchronous embedded-type double-liquid grouting device

Abstract

The invention discloses a shield tunneling machine shield tail synchronous embedded-type double-liquid grouting device comprising a first valve block, a second valve block and a shield body connecting block which are embedded in a shield tail. A liquid A passage, a liquid B passage, a piston passage and a water passage are arranged in each of the first valve block and the second valve block correspondingly, a piston rod is arranged in each piston passage, a piston is arranged in a piston cylinder, each piston rod is driven by a propelling cylinder, the liquid A passage and the liquid B passage positioned in the first valve block are communicated with the piston cylinder through a first communication passage, and the water passage positioned in the first valve block is communicated with the piston cylinder through a second communication passage. Position of the pistons is controlled by utilizing the propelling cylinders, so that overbreak clearance between a pipe piece and a tunnel stratum can be quickly made up after the shield tail is separated from the pipe piece in the process of shield tunneling, water seepage of joint and tail gap of the pipe piece is effectively prevented, and ground surface settlement is inhibited; the shield tunneling machine shield tail synchronous embedded-type double-liquid grouting device is suitable for various geographic conditions, simple to operate, less prone to being blocked and capable of improving construction efficiency.

Description

technical field [0001] The invention relates to a grouting device, in particular to a shield tail synchronous embedded double-fluid grouting device of a shield machine. Background technique [0002] At present, with a large number of subway constructions at home and abroad, tunnel shield excavation has gradually become the main means of urban underground construction by virtue of its own advantages. During the shield propulsion process, when the tail of the shield is separated from the segment, because the diameter of the excavation surface of the cutter head is larger than the outer diameter of the segment, there will be a gap between the segment and the tunnel stratum. If the gap is not backfilled in time, it will inevitably cause Stratigraphic changes, which in turn can have destructive effects on adjacent subsurface structures. Synchronous grouting is usually used on existing shield machines to suppress formation settlement and prevent water seepage at segment joints an...

AI Technical Summary

Problems solved by technology

The external double-liquid grouting device is only suitable for soft soil and not suitable for other geology because it protrudes from the shield and is prone to jamming; the double-liquid grouting device inserts the B liquid pipe into the A liquid pipe and mixes the grout The operation is complicated, the liquid pipe is prone to blockage, and the actual use effect is not good

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