Sea area high-water-pressure shield method tunnel emergency tool change structure and construction method

Abstract

The invention discloses a sea area high-water-pressure shield method tunnel emergency tool change structure and a construction method. A shield tunneling machine is arranged below a freezing work platform, the freezing work platform and the shield tunneling machine are connected through a soil freezing curtain, the soil freezing curtain is composed of a front end vertical freezing structure and alower vertical freezing structure, a cutter disc is arranged on the end, facing the soil freezing curtain, of the shield tunneling machine, and the shield tunneling machine is provided with multiple shield pipe pieces. The construction method comprises the steps that the position of the shield tunneling machine is positioned, a sea freezing work platform is constructed, shield tunneling machine protection work is carried out in the shield tunneling machine, the front end vertical freezing structure and the lower vertical freezing structure are applied, positive freezing is carried out, and thefreezing effect is checked and verified; a repairing tunnel is excavated; a cutter disc cutter box is repaired in the repairing tunnel; and after repairing, a freezing pipe is pulled out. Emergency tool changing, cutter disc repairing and the like under the risk accident to the seabed shield tunnel can be achieved, the structural manner and the method process are simple, the construction risk islow, and the influence on the sea face is small.

Description

technical field [0001] The invention belongs to the technical field of tunnel and underground engineering design and construction, and in particular relates to an emergency repair structure and a corresponding implementation method used in emergency conditions during the construction of shield tunnels in sea areas and under high water pressure conditions under water, so as to ensure the safety of shield tunneling machines. Get out of trouble and dig safely. Background technique [0002] Submarine or underwater tunnels are increasingly used as a way of passage with little impact on the environment and strong disaster prevention capabilities. The construction of underwater tunnels using the shield method is a common form. Compared with the mining method, the degree of mechanization is higher and the construction speed is faster. [0003] The construction of tunnels crossing waters for long distances is risky, especially for shield tunnels under the conditions of high water pr...

AI Technical Summary

Problems solved by technology

[0011] The present invention aims at the technical problem that the above-mentioned traditional shield method tunnel emergency treatment adopts the ground shaft method and cannot be applied to the subsea tunnel in the prior art, and provides an emergency tool change structure for the sea area high water pressure shield method tunnel to realize the subsea shield tunneling Emergency tool change and repair of the cutter head in case of risk accidents in the tunnel, etc., to ensure that the shield machine can safely get out of trouble and dig again, avoiding catastrophic accidents, and the structural form and construction method are simple, the structural force is reasonable, and the construction is convenient and fast. Work such as tool change and cutter head repair is carried out in the cave, with low construction risk and little impact on the sea surface

Images