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Deep sand-gravel stratum grouting device and method for carrying out comprehensive grouting by using same

A technology of gravel and stone layers, which is applied in the field of grouting devices for foundation anti-seepage treatment projects with deep sand and gravel covering layers, can solve problems such as low construction efficiency, high cost, stuck drill pipes and cast pipes, etc. The effect of high work efficiency and reduced labor intensity

Active Publication Date: 2017-05-10
GEZHOUBA GROUP FOUND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are only a few grouting projects with a hole depth of more than 100 meters in domestic sand and gravel foundation grouting projects, and most projects use the hole sealing method for construction, which is prone to accidents such as drill sticking and casting pipes in the hole, and construction efficiency is low , the problem of high cost

Method used

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  • Deep sand-gravel stratum grouting device and method for carrying out comprehensive grouting by using same
  • Deep sand-gravel stratum grouting device and method for carrying out comprehensive grouting by using same

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a grouting device for a deep sand and gravel layer includes a grouting pipe formed by threaded connection of multiple steel flower pipes 1, and a grout hole ring 2 composed of a plurality of grout holes is provided at intervals on each steel flower pipe 1. Each grout hole ring 2 is provided with a rubber hoop 4, and the two ends of the rubber hoop 4 are fastened on the steel flower pipe 1 through a limit fixing component. Lan Pan7.

[0035] The multi-segment steel flower pipes 1 are threadedly connected by threaded joints 3 to form grouting pipes.

[0036] In the limit fixing component, the two ends of the rubber hoop 4 are respectively provided with the limit hoop 5, and the two ends of the rubber hoop 4 are fixed with the limit hoop 5 through the transparent tape 8, so as to prevent the rubber hoop 4 from being installed under the entire grouting device. displacement occurs.

[0037] The distance between the two slurry outlet rings 2 on e...

Embodiment 2

[0042] Such as figure 2 Shown, a kind of method utilizing above-mentioned device to carry out comprehensive grouting of gravel layer, this method comprises the following steps:

[0043] Step 1: Drill the casing with a diameter of 146 mm to more than 60 meters to 80 meters with a follow-up drilling rig, pour filler into the drill hole to form a filler layer 9, and then install the steel flower pipe section with the bottom sealing plate 6 at the bottom into the drilled hole;

[0044] The filler should be continuously injected from the bottom of the hole through the catheter, and there should be no pause in the middle. The injection time of the filler should not exceed 1 hour. Filling can only be ended when it is full.

[0045] Step 2: Connect the multi-segment steel flower tubes 1 section by section in the form of threaded connection, put them into the drilled hole and splice them with the steel flower tube sections with the bottom sealing plate 6 installed at the bottom to f...

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Abstract

A deep sand-gravel stratum grouting device comprises a grout pipe formed by threaded connection of a plurality of perforated steel pipes, wherein grout outlet hole rings are formed in the perforated steel pipes at intervals; each grout outlet hole ring is composed of a plurality of grout outlet holes and is sleeved with a rubber hoop; the ends of the rubber hoops are fastened on the perforated steel pipes through limiting and fixing components; a bottom sealing plate is mounted at the bottom end of the grout pipe; and a flange plate is arranged at the top end of the grout pipe. According to the deep sand-gravel stratum grouting device and a method for carrying out comprehensive grouting by using the same, provided by the invention, a sleeve valve pipe grouting method and an orifice-closed grouting method are combined effectively, which can solve the technical problems of high in-hole accident rate and low working efficiency in curtain grouting construction in a deep sand-gravel stratum.

Description

technical field [0001] The invention relates to the field of drilling grouting, in particular to a grouting device and a grouting method used for the anti-seepage treatment project of deep sand and gravel overburden foundation. Background technique [0002] With the development of water conservancy and hydropower projects, the development of water conservancy and hydropower projects has gradually expanded to the western plateau and canyon basins, and the conditions for dam construction have become more and more complicated, especially in the key construction projects under the opportunity of the western development, with high mountains and deep valleys and deep covering layers , complex geological conditions. [0003] At present, there are only a few grouting projects with a hole depth of more than 100 meters in domestic sand and gravel foundation grouting projects, and most projects use the hole sealing method for construction, which is prone to accidents such as drill stic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/18
CPCE02D19/18
Inventor 童耀郝永志马开珉曹炜黄胜利丁跃顺童健王栋惠寒斌
Owner GEZHOUBA GROUP FOUND ENG