Steel frame anchoring type soft rock temporary supporting system

Abstract

The invention provides a steel frame anchoring type soft rock temporary supporting system, and belongs to the technical field of tunnel construction, the steel frame anchoring type soft rock temporary supporting system comprises a plurality of steel frame units and connecting assemblies arranged between the adjacent steel frame units, each steel frame unit comprises a steel arch frame, a plurality of anchor rod mounting seats and anchor rods, the steel arch frame is of an arch structure formed by detachably splicing a plurality of standard knots and is used for being supported on the rock wall of the inner side of a tunnel. The anchor rod mounting seats are respectively arranged on standard knots of the steel arch; the anchor rod is used for being inserted into a rock mass of the side wall of the tunnel and detachably connected with the anchor rod mounting base. After construction is completed, the steel arch frame, the anchor rod mounting base and the connecting assembly can be detached and recycled, so that too much space does not need to be reserved for the steel arch frame during construction, the excavation volume of a tunnel can be reduced, normal proceeding of subsequent procedures is not affected, and the construction efficiency is improved. Meanwhile, waste caused by the fact that a large number of steel arches are buried in the tunnel after construction is completed can be avoided, resources can be saved, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and more specifically relates to a steel frame anchor type soft rock temporary support system. Background technique [0002] Engineering soft rock refers to engineering rock mass that can produce significant plastic deformation under the action of engineering force. If soft rock formations are encountered during tunnel construction, it is very troublesome to deal with, and temporary support is basically required. At present, the usual way is to use steel arches with anchor rods and spray concrete on the support surface to form retaining walls. . [0003] However, in the actual construction process, although the steel arch frame is no longer needed to provide support after the construction, the steel arch frame and anchor rods are welded together, and the deformation of the rock mass during the long-term support process makes the steel arch frame and anchor rods welded together. The ...

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Problems solved by technology

[0003] However, in the actual construction process, although the steel arch frame is no longer needed to provide support after the construction, the steel arch frame and anchor rods are welded together, and the deformation of the rock mass during the long-term support process makes the steel arch frame and anchor rods welded together. The internal stress of the arch frame is very large, so it is difficult to dismantle it, so the steel arch frame and other structures are basically buried in the rock wall during lining

However, because the steel arches have a certain volume, they will occupy the space in the tunnel, so the excavation volume of the tunnel must be increased to make room for the support, otherwise it will affect the normal progress of the follow-up process; and some tunnels are under construction After the support, due to the change of geological conditions, the support structure needs to be reinforced, and these reinforcement structures may occupy the space in the tunnel, which will affect the subsequent process

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