Grouting stopping method for stratum pre-grouting reinforcement

A technology of grouting reinforcement and pre-grouting, which is applied in underground chambers, earthwork drilling, wellbore lining, etc., to achieve the effect of promoting effect, simple operation, and reliable grouting effect

Active Publication Date: 2021-03-09
GUANGZHOU RAIL TRANSIT CONSTR SUPERVISION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires that the surrounding rock of the hole wall has stable lithology, no vertical (70-90°) cracks (or vertical cracks, but they have been grouted) and hole sections with regular pore diameters. It is not necessary for some weak or broken formations. Applicable, only with grout-proof wall

Method used

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  • Grouting stopping method for stratum pre-grouting reinforcement

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution, and provides detailed implementation and specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

[0015] This embodiment provides a grout-stopping method for pre-grouting reinforcement in the formation, which includes the following steps:

[0016] S1. Install the orifice pipe 1 on the surface of the formation to be reinforced by grouting, and drill the grouting hole 2 along the orifice pipe 1 to the design depth; insert the PVC material grouting pipe into the grouting hole according to the design depth, and The iron grouting pipe on the flange cover plate of the orifice pipe is connected, and the flange cover plate 4 covers the front end of the orifice pipe 1 and is fixed and sealed with bolts.

[0017] S2. Extend the high-...

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Abstract

The invention discloses a grouting stopping method for stratum pre-grouting reinforcement. By injecting rapidly-solidified grout between a grouting pipe and a grouting hole wall, the grouting pipe stretching into a grouting hole and the grouting hole are solidified into a whole so as to prevent the grout from flowing back and flowing out of the hole along a drill hole during stratum reinforcementgrouting; and meanwhile, the part from an outlet of the grouting pipe to the bottom of the grouting hole is continuously washed away by high-pressure water, the rapidly-solidified grout is washed awayat any time and cannot stay, and the situation that the grout permeates into a stratum during stratum reinforcement grouting is not affected. According to the grouting stopping method for stratum pre-grouting reinforcement, materials are convenient to obtain, operation is easy, the stratum application range is wide, the grouting stopping effect is reliable, and the deep hole grouting effect can be promoted.

Description

technical field [0001] The invention relates to the technical field of formation reinforcement, in particular to a grouting method for pre-grouting reinforcement of formations. Background technique [0002] At present, the method of grout stopper is mainly to fix the expansion colloid on the periphery of the grouting pipe, install it in the grouting hole, make it expand and closely adhere to the wall of the borehole, and prevent the grout from returning along the borehole to flow out of the hole during grouting outside. This method requires that the surrounding rock of the hole wall has stable lithology, no vertical (70-90°) cracks (or there are vertical cracks, but they have been grouted) and hole sections with regular pore diameters. It is not necessary for some weak or broken formations. Applicable, only the grout wall can be used. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention aims to provide a grouting method fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21B33/03
CPCE21D9/001E21D11/10E21B33/03
Inventor 陶芳良黄威然竺维彬王洪东罗淑仪
Owner GUANGZHOU RAIL TRANSIT CONSTR SUPERVISION CO LTD
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