A large-scale underground engineering strong rigid support adjustable convergence restraint device and method

Abstract

The invention discloses a large-scale underground engineering powerful rigid support adjustable convergence restraint device and method. The device includes a rigid support for supporting surrounding rock, and several convergence restraint structures are arranged between the outer peripheral side of the rigid support and the rock mass to achieve convergence. The restraint structure includes a compression-resistant steel block in contact with the surrounding rock. At least one compression column is arranged on one side of the compression-resistant steel block. The outer side of the compression column is covered with an elastic member. One end of the elastic member is connected to the compression-resistant steel block, and the other end is provided with a pressure sensor. ; Outer shell, an open slot is set in the outer shell, the pressure node part is set at the bottom of the open slot, the pressure column is in contact with the pressure node part and the pressure column is set in the groove, and the pressure sensor is set at the bottom of the elastic part; The adjusting part is used to adjust the pressure of the elastic member. The adjusting part includes a rotating rod. A gear is arranged on the rotating rod.

Description

technical field [0001] The invention relates to underground engineering, in particular to a large-scale underground engineering powerful rigid support adjustable convergence restraint device and method suitable for large deformation tunnels of underground engineering. Background technique [0002] Under complex geological conditions, deep wells, soft rocks, and rock masses in dynamic pressure roadways present strong rheological properties, and it is extremely difficult to control the long-term stability of surrounding rocks. At this stage, the support type of strong rigid support with concrete filled steel pipe as the main body has alleviated the problems of insufficient strength, too small resistance, high cost and restricted pressure of the original U-shaped steel support to a certain extent. The strong rigid support of steel tube concrete is the Composite support structure composed of steel pipe and concrete. [0003] The existing support system is U-shaped steel or simp...

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Problems solved by technology

[0003] The existing support system is U-shaped steel or simple steel support system, which cannot absorb the additional transferred energy, and the deformation energy of the roadway surrounding rock cannot be released. Smaller, it is easy to cause stress concentration on the surface of the steel pipe, the bias phenomenon of the rigid support in the deep roadway is obvious, the rigid support has a lack of pressure capacity, and the excessively high strength requirements lead to an increase in support costs

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