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A Method of Micro-air Explosion Grouting to Treat Large Porosity and Loose Foundation Soil

A large-pore, foundation soil technology, applied in soil protection, foundation structure engineering, construction, etc., can solve problems such as difficulty in pile formation, and achieve the effect of improving the uniformity of the pile body and expanding the penetration range

Active Publication Date: 2020-09-04
BEIJING RONGCHUANG GEOTECHNICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to solve the problem of difficult pile formation in large pores and loose strata

Method used

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  • A Method of Micro-air Explosion Grouting to Treat Large Porosity and Loose Foundation Soil
  • A Method of Micro-air Explosion Grouting to Treat Large Porosity and Loose Foundation Soil
  • A Method of Micro-air Explosion Grouting to Treat Large Porosity and Loose Foundation Soil

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Embodiment Construction

[0023] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0024] A method for micro-gas blasting grouting to treat large pores and loose foundation soil includes the following steps:

[0025] Step 1. Prepare cement fly ash slurry and additive slurry, and use down-the-hole hammer high-pressure rotary jet drilling rig to make holes;

[0026] Step 2. Lift up the drill pipe 14 of the DTH hammer high-pressure rotary jet drilling rig, and at the same time, the nozzle 15 of the impact drill tool 16 of the DTH hammer high-pressure rotary jet drilling rig sprays high-pressure gas, the cement fly ash slurry and the additive slurry ,Such as Figure 1 to Figure 4 Shown.

[0027] The method for processing large pores and loose foundation soil according to the pr...

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Abstract

The invention discloses a method for treating large-pore loose foundation soil through micro gas explosion grouting. The method for treating the large-pore loose foundation soil through micro gas explosion grouting comprises the following steps that 1, cement fly ash slurry and additive slurry are prepared, and a down-the-hole hammer high pressure jet grouting drill is used for completing drillingoperation; and 2, a drill rod (14) of the down-the-hole hammer high pressure jet grouting drill is lifted up, a nozzle (15) of an impact drilling tool (16) of the down-the-hole hammer high pressure jet grouting drill sprays high pressure gas, the cement fly ash slurry and the additive slurry. By means of the method for treating the large-pore loose foundation soil through micro gas explosion grouting, the slurry permeation range is enlarged, pile body uniformity is improved, and finally massive stone cement or cement soil (pile) vertical enhancement body with the high strength can be formed.

Description

Technical field [0001] The invention relates to the field of construction, in particular to a method for micro-gas blasting grouting to treat large pores and loose foundation soil. Background technique [0002] With the economic development and urban expansion, there are more and more land reclamation sites for backfilling and rock dumping, some of which are even as high as hundreds of meters. Therefore, it has become a major problem in the geotechnical engineering community to reinforce the foundation of this kind of macroporous stratum and loose stratum. [0003] For this kind of macroporous and loose formations, the foundation reinforcement treatment usually adopts layered rolling method, dynamic compaction and dynamic compaction replacement method, gravel pile method and grouting method: including high-pressure rotary jet grouting method and sleeve valve pipe grouting. The traditional high-pressure jet grouting process makes the cement slurry sprayed into the formation easily ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00E02D3/12
CPCE02D3/00E02D3/12
Inventor 张亮张微马云飞戴斌朱允伟刘宏运曹巍张宝成郇盼左祥闯王浩浩
Owner BEIJING RONGCHUANG GEOTECHNICAL ENG CO LTD
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