Underwater large-diameter shield continuous tunneling construction tool with deformed tail shield and construction method

Abstract

The invention discloses an underwater large-diameter shield continuous tunneling construction tool with a deformed tail shield. The underwater large-diameter shield continuous tunneling construction tool comprises a water conveying unit, a plurality of high-pressure water bags and a plurality of guide strips, wherein the high-pressure water bags are fixed to the inner wall of a tail shield shell and located between the inner wall of the tail shield shell and the peripheral faces of segment rings, the water conveying unit comprises an industrial water tank, an input water pipe, a high-pressure water pump, an output water pipe and a tail end hose, the input water pipes of the high-pressure water bags in one group are connected in parallel to form a main input water pipe, and one end of the tail end hose of the water conveying unit is connected to the multiple high-pressure water bags in one group through quick connectors and the main input water pipe, the construction method comprises the following steps that (1) the high-pressure water bags are installed and connected to the water conveying unit; (2) the segment rings are assembled; (3) water injection and pressurization of the high-pressure water bag units in the segment rings are completed in sequence. and (4) shield driving and monitoring are conducted. According to the underwater large-diameter shield continuous tunneling construction tool with the deformed tail shield and the construction method, the deformed inner wall of the tail shield shell can be prevented from extruding segment pieces, damage to the segment pieces in a formed tunnel is reduced, the construction efficiency is improved, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a construction tool and method for an underwater tunnel, in particular to a construction tool and method that can continue to excavate after the tail shield of an underwater large-diameter shield has been plastically deformed, and belongs to the technical field of tunnel engineering. Background technique [0002] Shield tunneling is one of the main equipment used to build underwater tunnels crossing rivers and under the sea. 8-14m) or even super-large diameter (tunnel section diameter greater than 14m) submarine or river bottom tunnels and urban road tunnels. [0003] With the continuous increase of the types of strata that the shield tunnels through, the difficulty of construction gradually increases, and higher requirements are put forward for the manufacturing technology and excavation control of the shield tunnel. Large-diameter shield tunnels refer to shield tunnels with a diameter between 8 and 14m. During the excavation...

AI Technical Summary

Problems solved by technology

However, the above-mentioned tail shield deformation correction construction method has disadvantages such as complicated structural processing, long construction period, and high safety risks.

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