Water-rich disturbance sensitive stratum shield excavation grouting structure and construction method

Abstract

The invention discloses a water-rich disturbance sensitive stratum shield excavation grouting structure and a construction method. The water-rich disturbance sensitive stratum shield excavation grouting structure comprises a shield excavation channel, wherein the shield excavation channel is arranged in a water-rich disturbance sensitive stratum and extends into an adjacent stratum from the water-rich disturbance sensitive stratum. A first grouting double-ring channel and a second grouting double-ring channel are injection molded in the shield excavation channel, the first grouting double-ringchannel is located in the water-rich disturbance sensitive stratum, and the second grouting double-ring channel communicates with the end portion of the first grouting double-ring channel and extendsinto an adjacent stratum from the water-rich disturbance sensitive stratum. The first grouting double-ring channel and the second grouting double-ring channel are double-ring structures formed by inner and outer ring channels with different materials, so that the outer wall of a previously constructed outer ring is tightly attached to the inner wall of the shield excavation channel so as to sealthe water-rich disturbance sensitive stratum and a seepage channel in the adjacent stratum, and a later constructed inner ring channel is prevented from being influenced by underground water in the seepage channel.

Description

technical field [0001] The invention relates to the field of shield tunnels, in particular to a shield excavation and grouting structure for rich water disturbance sensitive strata. In addition, the present invention also relates to a construction method for constructing the shield excavation and grouting structure in water-rich and disturbance-sensitive stratum as described above. Background technique [0002] With the continuous deepening of urbanization in my country, the development and construction of underground space has received unprecedented attention and attention. The design and construction mileage of tunnels for traffic tracks and municipal utility corridors continue to set new records, and will continue to maintain a high-speed development trend in the future. However, due to the speed of construction development and the complexity of the underground environment, there are still many engineering problems that have not been solved. Effectively solve and seriousl...

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Problems solved by technology

[0005] The invention provides a shield excavation grouting structure and construction method for water-rich disturbance-sensitive strata to solve the problem that the cement grouting body existing in the excavation process of the traditional water-rich disturbance-sensitive stratum is easily diluted by the water-rich stratum , Slurry running problem is serious, the shield construction disturbs the massive subsidence and deformation of the ground surface, and the shield tail water seepage problem is prominent technical problems

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