A new method of rapid water stop and soil improvement

A water-stop and fast technology, applied in soil protection, construction, infrastructure engineering, etc., can solve the problems of slow slurry coagulation, poor piling effect, slow construction, etc., to achieve high slurry utilization, material saving, enhanced The effect of compactness

Active Publication Date: 2015-10-14
CHINA RAILWAY 16TH BUREAU GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of traditional rotary grouting piles is slow, the slurry coagulation speed is slow, and the effect of pile formation in silt and other soil layers is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] A new type of rapid water stop and soil improvement method, the steps are as follows:

[0023] 1), stop water;

[0024] The steps to stop water are:

[0025] a. Determine the water stop location, which is 1~2m back above the water outlet, and determine it as the drilling location.

[0026] b. Use a drill to drill holes.

[0027] c. Configure water glass and phosphoric acid slurry, water glass and cement slurry. In the water glass and phosphoric acid slurry, phosphoric acid is 50-70% phosphoric acid, and the volume ratio of phosphoric acid and water glass is 1:5-2:5. In the water glass and cement slurry, the volume ratio of water glass and cement slurry is 1:1-1:4.

[0028] d. Inject water glass and phosphoric acid slurry with a volume ratio of 1:5-2:5 to stop water.

[0029] e. Inject water glass and cement slurry with a volume ratio of 1:1-1:4 for reinforcement.

[0030] 2) Soil reinforcement and improvement;

[0031] The steps of soil reinforcement and improvement are:

[0032] a....

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PUM

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Abstract

The invention discloses a novel rapid water stopping and soil mass improving method which is characterized by comprising the following steps of 1, carrying out water stopping, i.e. a, determining a water stopping position; b, drilling by utilizing a drilling machine; c, preparing grout; d, injecting water glass and phosphoric acid grout to carry out water stopping; and e, injecting water glass and cement grout to carry out reinforcement; and 2, carrying out soil strengthening and conditioning, i.e. a, lofting a hole site; b, drilling; c, carrying out grouting by utilizing a grouting machine; d, lifting a spray rod until grouting is finished; and e, moving to a next hole site. According to the invention, the soil strengthening construction period before a tunnel is excavated is shortened; aiming at the condition of water leakage when a foundation pit is excavated, water can be timely stopped; solidifying and hardening time is easy to regulate; the grout with long designed hardening time also has high intensity; and the novel rapid water stopping and soil conditioning method is efficient and safe and is cost-saving. Moreover, the novel rapid water stopping and soil conditioning method has good permeability; the grout is not lost and is not shrunk after being solidified; a hardening agent has no toxicity; and pollution cannot be caused to the underground water.

Description

Technical field [0001] The invention belongs to the technical field of tunnels and foundation pits water stopping and soil improvement, and specifically relates to a new type of fast water stopping and soil improvement method. Background technique [0002] During the excavation of foundation pits or tunnels, there is water leakage and sand leakage. At this stage, in view of this situation, the method of drilling and pouring polyurethane is generally adopted for sealing. However, the polyurethane foaming process is slow and difficult to control. For larger water and sand inrush situations, it is more difficult to deal with, and a large amount of polyurethane flows out with water during the grouting process, which is a serious waste. At the same time, the strength of polyurethane is low, and there is a risk of secondary water and sand gushing. [0003] Before tunnel excavation, the excavation area and surrounding soil should be improved to meet the excavation conditions. At this s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/16E02D3/12
Inventor 杨公正白枝奉唐文周刘振华
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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