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Sleeve valve pipe grouting method after boulder blasting treatment

A sleeve valve pipe grouting and sleeve valve pipe technology, which is applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve problems such as tool damage, mud stagnation, and poor sealing of end openings, so as to speed up grouting Progress, prevention of grouting, good quality of grouting and good reinforcement effect

Inactive Publication Date: 2020-01-14
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sometimes the boulders are large in size, high in strength, and widely distributed, and it is difficult to break the rock with tools. Excavation in the boulder area may easily cause damage to the cutter head and knives. It is necessary to drill and blast the boulders first. If the particle size is larger than the opening size of the grid, or the opening door at the originating end is poorly sealed, the mud tank will not be able to build up pressure, resulting in poor mud slag-carrying capacity, which will easily lead to mud stagnation and blockage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A sleeve valve pipe grouting method after boulder blasting treatment, characterized in that it comprises the following steps:

[0028] (1) Hole layout and drilling: blast holes after blasting are used, and after blasting is completed, drill down to destroy the blasting pipe and lower sleeve valve pipe; the bedrock section adopts a drilling rig to directly form holes, and after the blasting of the raised section of the bedrock is completed, the blasting Rearrange the holes in the pretreatment section;

[0029] The step of described drilling is:

[0030] ① Drilling rigs are used for the backfilling layer, and the lower stratum is drilled with a geological drilling rig using a Φ89 drill bit according to the design requirements; the horizontal hole position error of the drilling hole is ≤ 5cm, the verticality of the drilling hole is ≤ ± 1°, and the drilling depth exceeds the design depth by 0.5 ~ 1m , to meet the depth of the lower tube;

[0031] ② Use dilut...

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PUM

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Abstract

The invention discloses a sleeve valve pipe grouting method after boulder blasting treatment. The method comprises the steps of hole distribution and drilling, closing mud replacement, sleeve valve pipe mounting, sleeve shell material replacement and grouting construction; holes are drilled at intervals for grouting; the hole drilling and grouting operations are performed in sequence; grouting sections are arranged in multiple areas for grouting; the mud mixing, the mud runout, the pipe clamping and the pipe blockage can be effectively prevented in the grouting process; and gaps of the grouting sections are determined according to the scene time conditions, so that the parallel operation is facilitated, and the grouting progress is accelerated.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a grouting method for a sleeve valve pipe after boulder blasting treatment. Background technique [0002] Boulders will be encountered during the excavation and rock breaking process of the shield machine. The treatment method of the boulders is determined according to the size, position, shape, and surrounding environmental factors of the boulders. The main treatment methods include grouting reinforcement, drilling and blasting, and man-dug piles , Rotary drilling mechanical treatment, impact crushing, dense drilling, etc. Sometimes the boulders are large in size, high in strength, and widely distributed, and it is difficult to break the rock with tools. Excavation in the boulder area is likely to cause damage to the cutter head and tools. It is necessary to drill and blast the boulders first. If the particle size is larger than the opening size of the grid, or the ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10
Inventor 孙振川张兵张合沛潘东江陈桥王凯王发民杨振兴郭璐李宏波
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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