Treatment method for grouting sand-layer foundation on the condition of flowing water

A treatment method and grouting technology, which is applied in the field of grouting treatment of sand foundations, can solve problems such as high technical requirements for construction operations, difficult grouting methods, unsatisfactory construction quality effects, etc., and achieve good impermeability and low cost , the effect of convenient operation

Inactive Publication Date: 2010-04-14
GUANGDONG FOUND ENG GRP CO LTD
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Problems solved by technology

This grouting method is difficult, requires high technical requirements for cons

Method used

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Embodiment Construction

[0011] A grouting treatment method for sand foundations under hydrodynamic conditions, comprising the following steps:

[0012] (1) A plurality of overlapping grouting holes are processed on the reinforced sand foundation with a spindle rotary drilling rig; thus, the reinforced soil is integrated into a whole in the plane and depth range.

[0013] (2) insert grouting pipe in the grouting hole of step (1), adopt the grouting grout that two kinds of materials of mud or cement and mud powder are mixed form in the sand layer foundation under the condition of flowing water from grouting pipe injection; The production materials can also include bentonite, cohesive soil with low sand content, etc.

[0014] (3) After the grout settles and solidifies, inject pure cement grout directly into the grouting hole in step (1), or use the spindle rotary drilling machine to process multiple overlapping parts at the position where the first batch of grout has been poured. The grouting hole is i...

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Abstract

The invention discloses a treatment method for grouting a sand-layer foundation on the condition of flowing water, comprising the following steps: 1. adopting a spindle swing rig to process a plurality of grouting holes which are partially overlapped on the strengthened sand-layer foundation; 2. inserting a grouting pipe into the grouting holes and injecting grouting slurry which is formed by the mixing of mud or two materials of cement and mud to the sand-layer foundation on the condition of flowing water from the grouting pipe; 3. directly injecting pure cement slurry into the same one drilling hole or re-adopting the spindle swing rig to process a plurality of grouting holes which are partially overlapped at the position where a first batch of slurry is grouted after the slurry is precipitated and cured, and then inserting the grouting pipe and injecting the pure cement slurry; and 4. using a waterstop to block the grouting holes after the slurry is injected to each grouting hole. Compared with the pure cement slurry, the treatment method for the grouting of a sand-layer foundation on the condition of flowing water has low cost, good flowability and permeability, high concretion rate, simple technology equipment, and convenient operation.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a grouting treatment method for sand foundations under dynamic water conditions. Background technique [0002] At present, conventional grouting methods for sandy foundations include static pressure grouting, deep agitation grouting, and high-pressure jet grouting. After a certain period of time under still water conditions, they can form concretions with high strength and low permeability, so as to achieve the purpose of forming a water-stop curtain and treating soft ground. However, when the sand layer forms dynamic water conditions under the influence of factors such as changes in the groundwater level and groundwater extraction, the current common treatment method is to add admixtures such as water glass to the cement slurry to make the slurry solidify in a short time. Reduce the impact of moving water. This kind of grouting method is difficult, the technical requiremen...

Claims

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Application Information

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IPC IPC(8): E02D3/12
Inventor 邵孟新叶建荣龚胜余剑锋
Owner GUANGDONG FOUND ENG GRP CO LTD
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