Anti-subsidence and convergence hydraulic side support device for excavation of lower steps in soft rock tunnel

Abstract

The invention discloses a settlement and convergence preventing hydraulic side supporting device for lower bench excavation of a soft rock tunnel. The settlement and convergence preventing hydraulic side supporting device structurally comprises two bearing plates, linkage through pipes, an adjusting force-balancing device, and splicing rods; and the two bearing plates are horizontally mounted on the two side faces of the lower end of the adjusting force-balancing device, and the linkage through pipes are vertically mounted on the front surface of the adjusting force-balancing device. Gas is delivered to an extrusion pneumatic box through a flow-guiding gas pipe, the gas pressure in the extrusion pneumatic box is increased to extrude a linkage bent plate, and then an extrusion force-unloading plate is pushed to conduct extrusion force-unloading on the bearing plates; through an adjusting mechanism and a linkage mechanism in the adjusting force-balancing device, the size of the supporting device can be adjusted at will, and the situation that the supporting force of the tunnel supporting device is insufficient, then the tunnel supporting device needs to be re-manufactured, consequently, the construction quality is increased, and the construction speed is delayed is prevented; and meanwhile, through an anti-pressing mechanism, the situation that mountain force borne by all parts of the tunnel device is different, consequently, the single part bears force for a long time, the structure is damaged, and tunnel collapse is caused is prevented.

Description

technical field [0001] The invention relates to the field of anti-subsidence convergence hydraulic side support devices for excavation of lower steps of soft rock tunnels, in particular to an anti-subsidence convergence hydraulic side support device for excavation of lower steps of soft rock tunnels. Background technique [0002] The anti-subsidence convergence hydraulic side support device for the excavation of the lower steps of the soft rock tunnel is used to support the structure inside the tunnel, change the structure inside the tunnel, and leave a through hole for construction operations, which is convenient for people to mine and construct the tunnel . [0003] 1. However, the existing anti-subsidence convergence hydraulic side support device for the excavation of the lower steps of the soft rock tunnel, the support structure is customized according to the size of the tunnel, resulting in the size of the tunnel excavation due to the different softness of the soil, res...

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Problems solved by technology

[0003] 1. However, the existing anti-subsidence convergence hydraulic side support device for the excavation of the lower steps of the soft rock tunnel, the support structure is customized according to the size of the tunnel, resulting in the size of the tunnel excavation due to the different softness of the soil, resulting in insufficient support for the tunnel support device, making it necessary to Reworked the tunnel support device, resulting in increased construction volume and slower construction speed

[0004] 2. At the same time, due to the irregular shape of the mountain body in the existing tunnel support device, the mountain force on each part of the tunnel device is different, resulting in damage to the structure of a single part under long-term stress, resulting in the collapse of the tunnel

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