Hole collapse prevention steel flower anchor pipe and using method thereof

Abstract

The invention provides a hole collapse prevention steel flower anchor pipe and a using method thereof. The hole collapse prevention steel flower anchor pipe comprises a pipe body with the interior of a hollow structure, one end of the pipe body is provided with a connecting component used for being connected with an anchor rod motor, the other end of the pipe body is provided with a screwing-in component composed of a protrusion and a notch, therefore the steel flower anchor pipe can be conveniently screwed into a drill hole, a plurality of regularly-arranged grouting holes are formed in the outer side of the pipe body, the grouting holes are formed so that slurry can permeate into a rock-soil layer through the grouting holes during later grouting, anchoring is facilitated, a kerf is further formed in the pipe wall of the pipe body, and when the steel flower anchor pipe is screwed into the drill hole, the kerf can scrape residues on the wall of the drill hole into the pipe body, and cleaning of the interior of the drill hole in the later period is facilitated.

Description

technical field [0001] The invention relates to the technical field of support for urban rail transit tunnels, slopes and foundation pits, in particular to a steel flower anchor pipe for anti-collapse holes and a use method thereof. Background technique [0002] The pipe shed is mainly used in weak and broken surrounding rock tunnel projects with strict control requirements for surrounding rock deformation and surface settlement, and plays a role in resisting shear deformation. In the weak and broken surrounding rock, under the disturbance of the rock-breaking drilling tool, the hole is prone to collapse after drilling, so it is necessary to insert a steel flower tube to keep the hole from collapsing, to support the hole, and to facilitate the later grouting , in order to facilitate the insertion of the pipe body into the borehole, the traditional steel flower pipe is provided with a tapered structure at its end. After the steel flower pipe is inserted, the sediment accumula...

AI Technical Summary

Problems solved by technology

In the weak and broken surrounding rock, under the disturbance of the rock-breaking drilling tool, the hole is prone to collapse after drilling, so it is necessary to insert a steel flower tube to keep the hole from collapsing, to support the hole, and to facilitate the later grouting , in order to facilitate the insertion of the pipe body into the borehole, the traditional steel flower pipe is provided with a tapered structure at its end. After the steel flower pipe is inserted, the sediment accumulates in the deep part of the borehole, so that the sediment in the borehole cannot be removed, which in turn affects the construction quality of the pipe shed, and even affects The depth of the pipe shed can not meet the design requirements, and even lead to the inability to effectively erect the pipe shed, which affects production safety

[0003] In order to integrate the slurry with the innermost rock and soil layer of the pipe body during grouting in the later stage, cracks are opened on the conical structure, but during the use of such steel flower pipes, the grouting holes on the conical structure will be damaged Inject cement mortar into the front end of the conical structure of the steel flower tube. When the cement mortar is injected outward, it will directly act on the outside of the steel flower tube conical structure, which will produce a backward reaction force on the steel flower tube. Falling out of the soil, especially the steel flower tube inserted into the soil obliquely, is also affected by its own gravity, and it is easier to fall off from the soil. In this way, the construction personnel need to set up additional devices for supporting and fixing the steel flower tube. reduce the workload of construction workers

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