Grouting method and press-in type hollow grouting anchor pipe

Abstract

The invention discloses a grouting method and a press-in type hollow grouting anchor pipe. The press-in type hollow grouting anchor pipe comprises a hollow anchor rod, wherein grouting holes are formed in the peripheral side of a rod body of the hollow anchor rod, one end of the hollow anchor rod is in a pointed tail shape, the other end of the hollow anchor rod is detachably connected with an anchor head, and one end of the anchor head is inserted into the hollow anchor rod. The invention further discloses the grouting method, which is applied to the press-in type hollow grouting anchor pipeand is characterized in that the hollow anchor rod provided with the anchor head is mechanically pressed into a rock-soil foundation to be constructed, then the anchor head is taken down, grout is injected into the hollow anchor rod from the position, provided with the anchor head, of the hollow anchor rod, and the grout is enabled to flow out of the grouting holes and fill the periphery of a rodbody and a rock-soil foundation hole drilled by the hollow anchor rod. In conclusion, by the adoption of the press-in type hollow grouting anchor pipe, two steps of hole forming and anchor pipe press-in can be combined into a whole, the construction process is simplified, the construction period is shortened, the press-in type hollow grouting anchor pipe is particularly suitable for construction of loose and soft layers such as blast furnace slag, soil layers and sand layers, in addition, the anchor head can be repeatedly used, and the construction cost is reduced.

Description

Technical field [0001] The invention relates to the field of building construction, in particular to a press-in hollow grouting anchor pipe. The invention also relates to a grouting method, which is applied to the press-in hollow grouting anchor pipe. Background technique [0002] Anchor is a commonly used tool for roadway support at present, and its function is to strengthen the main body of slopes, tunnels and dams. The anchor rod is divided into a free section and an anchor section. The free section refers to the area that transmits the tensile force at the bolt head to the anchor solid and connects with the engineering structure; the anchor section penetrates into the ground and its function is to prestress the ground. [0003] And grouting refers to the use of appropriate methods to inject certain solidified grout into the cracks or pores of the rock and soil foundation, and to improve the mechanical properties of the rock and soil foundation by replacing, filling, and squeez...

AI Technical Summary

Problems solved by technology

[0005] The above grouting construction method is operated step by step, resulting in complex and cumbersome construction technology, slow hole forming speed and high cost, which is not conducive to the grouting effect of loose and weak layers

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