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Construction method of hollow anchor rod grouting through double ball valve connecting pipe

A technology of connecting pipes and double ball valves, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of grouting backflow or long construction period, and achieve the problems of insufficient grouting, simple equipment and cost saving Effect

Inactive Publication Date: 2014-05-14
RAILWAY TENTH GROUP NORTHWEST ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a double ball valve connection pipe hollow anchor rod grouting construction method, which solves the technical problems of grouting backflow or long construction period in the background technology

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  • Construction method of hollow anchor rod grouting through double ball valve connecting pipe
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Embodiment Construction

[0026] The principle of the construction method of the present invention is to inject (press) the grout into the injected cavity through a relatively large pressure. In order to avoid the grout backflow in the injected cavity caused by unloading when the grouting is terminated, the ball valve at the tail end is closed first when the grouting is stopped. , then turn off the grouting pump, and finally remove the pipeline between the two ball valves, and remove the left ball valve after the initial setting of the grout. In this way, a good grouting reinforcement effect has been obtained, and the problem of grout backflow and insufficient filling of the injection cavity when the vault grouting is stopped in the past has been avoided.

[0027] The casing wall water flushing method is used to drill the holes, and the layout is different according to the size of the void area. The drilling depth should reach the grouting consolidation section. Records should be made during the drillin...

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Abstract

A construction method of hollow anchor rod grouting through a double ball valve connecting pipe includes the first step of staking out in survey, the second step of drilling, the third step of pre-burying a grouting pipe, the fourth step of connecting double ball valves, the fifth step of grouting and the sixth step that after every hole is grouted, the ball valve at the far end is closed first, a grouting pump is then closed, the connecting pipe between the ball valves is closed at last, and the remaining ball valve is detached after slurry sets initially. With the construction method, the construction speed is increased, according to the double ball valve grouting method, the ball valve at the tail end and the connecting pipe can be fast detached after grouting liquid is grouted, and then the next hole is grouted; according to a single ball valve grouting method or other grouting methods, the next step of grouting can be performed only after the slurry sets initially, and the waiting time is long; operation is flexible, equipment is simple, and the connecting pipe and the ball valves are easy to install and detach.

Description

technical field [0001] The invention relates to an engineering construction method, in particular to a double-ball valve connection pipe hollow anchor rod grouting construction method, which is suitable for grouting obliquely or vertically upwards in tunnels or grouting parts of tunnels where grouting is not full. Background technique [0002] Usually in the tunnel disease remediation project, it is necessary to use back grouting and backfilling for the defects such as voids or looseness behind the tunnel lining. Method After the grouting is completed, if the grouting pump is turned off immediately, the grout will flow back before it is solidified, resulting in inaccurate grouting at the grouting position, affecting the quality of the project, and the backflowing grout will pollute the track bed and cause a waste of grout; or you need to wait for the grout After solidification, close the grouting pump again, which wastes time greatly, and each grouting hole all needs this wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/02
Inventor 周益辉张军朱倩
Owner RAILWAY TENTH GROUP NORTHWEST ENG
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