Device and method for controlling tunnel deforming through anchors and ground anchorage beam

Abstract

The invention discloses a device for controlling tunnel deforming through anchors and a ground anchorage beam. The device comprises the ground anchorage beam which is arranged above a tunnel and located on the ground on the side away from a foundation pit even wall, multiple tensile force control and deforming monitoring devices are connected between the ground anchorage beam and the tunnel, eachtensile force control and deforming monitoring device comprises two to three anchors, jacks with the number same with that of the anchors, and four displacement monitoring devices, the anchors are connected between the tunnel and the ground anchorage beam, the jacks are arranged at one ends, located on the ground anchorage beam, of the anchors, and the displacement monitoring devices are arrangedon the two sides of a rail ballast bed of the tunnel and waistline positions of the two sides of the tunnel. The influence of the deforming of the tunnel outside the foundation pit on the surroundingis controlled to be small, the deforming of the tunnel outside the pit is controlled under the condition that the influence on the surrounding building is very small, in the full construction process,grouting is not involved in, the influence on an original stratum and an existing building is small, and meanwhile, after tunnel deforming stability, the ground anchorage beam can be dismantled according to actual needs.

Description

technical field [0001] The invention relates to foundation and foundation engineering construction, in particular to an active control device and method for controlling deformation of a tunnel outside a foundation pit by using a cable anchor. Background technique [0002] With the rapid development of my country's social economy, the progress of modern city construction is accelerating, large-scale comprehensive multi-functional buildings are emerging, and infrastructure construction is also improving day by day. During the excavation of the foundation pit, the unloading effect of the adjacent soil causes the corresponding deformation of the foundation pit enclosure, which causes the corresponding displacement and deformation of the adjacent building foundation or the tunnel outside the pit along with the soil. For example, most of the existing subway tunnels in operation are shield tunnels connected by prefabricated concrete segments and high-strength bolts, which are sensi...

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Problems solved by technology

[0006] Aiming at the technical problems that conventional passive control and active grouting control for controlling the deformation of the tunnel outside the foundation pit cannot dynamically control the deformation of the tunnel in real time, this invention proposes a device that uses cable anchors and ground anchor beams to actively control the deformation of the tunnel outside the foundation pit

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