Grouting bag type end-enlarged anchor rod for tunnel rectification and use method

Abstract

The invention discloses a grouting bag type end-enlarged anchor rod for tunnel rectification and a use method. A sealing cover and the bottom of an outer tube define a gap into an annular inner cavity, and a plurality of separation pieces for separating the annular inner cavity into a plurality of separate chambers in a sealing manner are arranged in the annular inner cavity at intervals; an outergrouting hole is formed in the wall of the outer tube in each separate chamber, an elastic grouting bag is fixed arranged outside each outer grouting hole in a covering manner, and inner cavities ofthe elastic grouting bags are in sealed communication with the corresponding separate chambers through the corresponding outer grouting holes; an inner grouting hole for communicating the annular inner cavity with an inner tube is formed in the wall of the inner tube, and an opening for realizing grouting in the inner tube is formed in the top end of the inner tube; the inner tube and the inner grouting hole are communicated to form a first channel for performing grouting on the separate chambers one by one; the outer grouting hole in each separate chamber is communicated with the corresponding elastic grouting bag to perform grouting on the corresponding elastic grouting bag.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a grouting capsule type expansion head bolt used for tunnel deviation correction and a method for using it. Background technique [0002] With the rapid development of urbanization in China, the construction of underground space is developing in a deeper and larger direction in recent years. At present, many deep and large foundation pits are constructed close to the existing subway tunnels and underground passages. However, the construction of deep and large foundation pits will cause changes in the force of the tunnel, causing disturbance of the underground soil, affecting the original structure of the soil, and then affecting the underground structure. The normal use of the tunnel will cause a series of diseases, ranging from offsetting the axis of the tunnel to causing damage to the tunnel structure and making it impossible to use normally. [0003] The Chine...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect that the grouting bladder anchor in the background technology cannot selectively control the grouting direction, the embodiment of the present application provides a grouting bladder expansion head anchor for tunnel deviation correction and its use method

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