Duct piece temporary support device used for shield tunnel accident emergency rescue

Abstract

Disclosed is a duct piece temporary support device used for shield tunnel accident emergency rescue. The duct piece temporary support device comprises a supporting duct piece gasbag mechanism, wherein the supporting duct piece gasbag mechanism comprises a lining and an external capsule, and the lining is covered by the external capsule; the inner circumference of the lining is provided with three inflating and deflating holes, and the three inflating and deflating holes are fixed on the lining through a flange plate. According to the duct piece temporary support device used for the shield tunnel accident emergency rescue, air inflation is conducted quickly to form an inflating circular ring, the inflating circular ring is tightly attached to the inner wall of a tunnel, and thus supporting and stabilizing a tunnel duct piece is achieved; meanwhile, water retaining in the tunnel in an earlier stage can be achieved, fast temporary support of the duct piece in the shield tunnel accident emergency rescue can be achieved, and the destruction process of the tunnel duct piece is delayed; the emergency rescue facility is light, convenient and low in cost, and can be repeatedly used; after the facility is ready, emergency rescue personnel can smoothly pass without influencing emergency rescue working face within the range of a shielding tunnel machine.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a segment temporary support device used for emergency rescue of shield tunnel accidents. Background technique [0002] At present, my country is carrying out large-scale rail transit construction, and most subway tunnels are constructed by shield machines. In the construction of subway tunnels in areas with high groundwater levels and complex geological conditions, water seepage accidents occur from time to time. Once a shield tunnel flooding accident occurs, it may lead to flooding of the tunnel, damage to the shield segments, and even the destruction of the entire tunnel, which may cause major economic losses and casualties. [0003] After a shield tunnel seepage accident occurs, if the measures are not taken in time and the leakage point is not well controlled, the accident may be further expanded. Eventually, the outer soil of the segment near the shield ...

AI Technical Summary

Problems solved by technology

[0004] However, the method of pouring the concrete dam body cannot directly support the segments near the shield tail, and there are still many shortcomings: 1. When pouring the concrete dam body, all personnel in the tunnel must be evacuated, resulting in the loss of the working surface on the site and the inability to control the seepage. Plug the leak

[0005] 2. The time for pouring the concrete dam body is too long, which will lead to further expansion of the danger and increase the loss

[0006] 3. The support effect on the tunnel segment is not direct enough

[0007] The above problems directly affect the rescue efficiency of shield tunneling accidents

Images