Adjustable convergence confinement device and method for large underground construction strong rigid support

Abstract

The invention discloses an adjustable convergence confinement device and method for a large underground construction strong rigid support. The device comprises the rigid support used for supporting surrounding rock, and a plurality of convergence confinement structures are arranged between the peripheral side of the rigid support and the rock. Each convergence confinement structure comprises a compression-resistant steel block, a shell and an adjusting part. At least one yielding column is arranged on one side of each compression-resistant steel block and sleeved with an elastic part, one end of each elastic part is connected with the corresponding compression-resistant steel block, and the other end of the elastic part is provided with a pressure sensor. Each shell is internally provided with an open groove, a yielding joint part is arranged at the inner bottom of each open groove, the yielding columns make contact with the corresponding yielding joint parts and arranged in grooves, and the pressure sensors are arranged at the bottoms of the corresponding elastic parts. Each adjusting part is used for adjusting the pressure of the corresponding elastic part and comprises a rotating rod provided with a gear, parts of gear teeth of each gear are engaged with an adjusting mark column, and one end of each adjusting mark column is fixed to the corresponding compression-resistant steel block.

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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