Shield tunnel segment and operation method thereof

Abstract

The invention provides a shield tunnel segment which comprises a shield segment body, grouting holes and connection holes are formed in the inner wall face of the shield segment body, and a plurality of grouting channels connected with the grouting holes are formed in the shield segment body; the power supply box is arranged on the inner wall surface of the shield segment body; the lifting support systems are used for monitoring the pressure of a soil layer around the tunnel on the shield segment body; the telescopic anchor rod systems are used for grouting and reinforcing soil layers around the tunnel, each telescopic anchor rod system comprises a telescopic anchor rod arranged in the center of the lifting support system, one end of the telescopic anchor rod is connected with the grouting channel, and the other end of the telescopic anchor rod is provided with a plurality of small holes and can extend into the soil layers around the tunnel; a plurality of duct piece slab staggering electrical measurement systems used for monitoring slab staggering values between duct pieces; meanwhile, the invention further provides an operation method based on the shield tunnel segment.

Description

technical field [0001] The present disclosure relates to the technical field of tunnel engineering equipment, in particular to a shield tunnel segment and an operation method thereof, in particular to a new type of shield segment with a lifting support suitable for soft ground. Background technique [0002] With the continuous development of the economy and the advancement of science and technology, the process of urbanization in my country has been accelerating, and the urban population has also begun to increase rapidly, which has brought unprecedented pressure to urban traffic. Due to the relatively limited ground space, the ground transportation in many big cities is close to saturation. In order to solve the contradiction between the insufficient ground transportation capacity and the continuous population growth, underground transportation began to develop gradually. The subway is famous for its convenient, fast and efficient transportation characteristics. It is widel...

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Problems solved by technology

[0003] The traditional shield tunnel segment has the following problems: In order to reduce the damage to the tunnel caused by the subsidence of the soft soil layer, certain surface grouting reinforcement will be carried out in the serious subsidence section, and the surface grouting has certain inhomogeneity and unknownness , the grouting effect is relatively poor, and it will greatly increase the project cost while occupying the surface space; when the ground subsides unevenly, the distribution of the external force on the segment will change, and the stress concentration will occur at some positions, while the segments are Assembled, it is difficult to resist external force only by the friction between the segment joint and the segment, which will cause the segment to be dislocated, reducing the load-bearing capacity and waterproof capacity of the segment; the tunnel segment dislocation is developing faster than the dislocation When the limit value is reached, there is no timely alarm device for early warning, so that the rescue is not timely, and in severe cases, the tunnel will collapse, causing great harm and irreparable losses

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