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Fabricated karst grouting pipe protecting assembly and grouting method

A prefabricated, tube component technology, applied in soil protection, roads, construction, etc., can solve the problems of increasing the difficulty of hole cleaning, failure to increase pressure, and loss of grout, so as to enhance the effect of grouting reinforcement, reduce loss, reduce The effect of the loss of slurry

Pending Publication Date: 2020-01-03
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in the grouting reinforcement construction for karst, when grouting a single hole, grouting often occurs in the remaining holes, resulting in the holes being grouted unable to increase the pressure, and the grout is lost. The grout hole increases the difficulty of clearing the hole, and the currently used jump hole drilling grouting and multi-hole simultaneous grouting each have certain defects. An assembled karst grouting protection pipe assembly and a grouting method are provided. The type karst grouting protective pipe assembly can effectively prevent the grout from crossing during the grouting process, so that the grout is only sprayed out from the protective pipe, and prevents the reverse flow into the protective pipe, ensuring the effect of grouting reinforcement. It has a simple structure, strong practicability, and is easy to to promote

Method used

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  • Fabricated karst grouting pipe protecting assembly and grouting method
  • Fabricated karst grouting pipe protecting assembly and grouting method
  • Fabricated karst grouting pipe protecting assembly and grouting method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides an assembled karst grouting protection pipe assembly;

[0036] Such as Figure 1-Figure 6 As shown, the assembled karst grouting protection pipe assembly in this embodiment includes multiple joints of protection pipes 11 that are detachable in sequence. The protection pipes 11 are hollow and have a certain thickness. Each section of the protection pipe 11 is provided with multiple A grouting hole 13, the grouting hole 13 communicates with the inside and outside of the protective pipe 11, a check valve plate 33 is arranged in the grouting hole 13, and the one-way valve plate 33 can make the grout in the protective pipe 11 flow from The grouting hole 13 flows out and prevents the external grout from flowing into the protective tube 11 from the grouting hole 13 .

[0037] In the present invention, multiple protective pipes are detachably butted in sequence, and each protective pipe is provided with a plurality of grouting holes. , the one-way val...

Embodiment 2

[0047] Such as Figure 1-Figure 6 As shown, this embodiment provides a grouting method using the assembled karst grouting protection pipe assembly in Embodiment 1, including the following steps:

[0048] Step 1. According to the pile position control coordinates, drill holes on the ground;

[0049] Step 2. After the drilling is completed, put a model tube with the same outer diameter as the protective tube in the borehole. The model tube is required to be placed in the center of the borehole as much as possible, and the casing material 43 is used to fill the space between the model tube and the borehole wall. When filling the casing material, reserve a section at the opening of the drill hole without filling (cement mortar will be injected later), take out the model tube after the casing material is solidified, and then put the first section of protective tube into the drill hole , before the first section of protective tube is put in, connect the second section of protective...

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Abstract

The invention discloses a fabricated karst grouting protection pipe assembly and a grouting method. The fabricated karst grouting protection pipe assembly includes a plurality of sections of protection pipes which are detachably and sequentially connected in a butt-joint mode, each section of the protection pipes is provided with a plurality of grouting holes, the grouting holes communicate with the inner sides and the outer sides of the protection pipes, the grouting holes are internally provided with one-way valve plates, and the one-way valve plates can enable grout in the protection pipesto flow out of the grouting holes, and prevent the external grout from flowing into the protection pipes from the grouting holes. When any hole is grouted, the grouting protection pipe assembly can effectively prevent the grout from leaking out of other holes, so that the grout only sprays out of the protection pipes and is prevented from reversely flowing into the protecting pipes, the grouting pressure of the grouting holes is ensured in the grouting process, the loss of the grout is reduced, and the grouting reinforcement effect is enhanced. Compared with existing hole jumping drilling grouting and multi-hole simultaneous grouting measures, the waste of resources is significantly reduced, and the prevention and control of grout leaking is achieved from a source. The fabricated karst grouting protection pipe assembly and the grouting method have the characteristics of simple structure, convenient construction and the like, and are easy to promote.

Description

technical field [0001] The invention relates to the technical field of karst grouting reinforcement, in particular to an assembled karst grouting protection pipe assembly and a grouting method suitable for areas where karst fissures develop. Background technique [0002] With the rapid construction of high-speed railways, it is inevitable to encounter karst areas. In order to ensure the stability of the subgrade and control the subsidence of the subgrade, a certain range of deep karst is grouted and reinforced. Karst grouting reinforcement mainly improves the physical and mechanical properties of rock and soil by filling grout into natural or man-made pores or cracks. At present, grouting reinforcement first drills holes in the rock and soil by drilling rigs to expose pores and cracks, and then uses grouting equipment to inject grout into the formation, and maintaining the grouting pressure plays a decisive role in the effect of grouting reinforcement. [0003] However, in...

Claims

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Application Information

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IPC IPC(8): E01B2/00E02D3/12
CPCE01B2/00E02D3/12
Inventor 张硕褚宇光王智猛周波李俊孟伟陈建武沈均张建文张涛李睿
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD