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Novel rapid water stopping and soil mass improving method

A water-stopping and fast technology, applied in soil protection, construction, infrastructure engineering, etc., can solve the problems of slow construction, poor piling effect, slow slurry coagulation speed, etc., to achieve enhanced compaction, cost saving, slurry utilization high rate effect

Active Publication Date: 2013-11-13
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 novel rapid water stop and soil improvement method, the steps are as follows:

[0023] 1), stop water;

[0024] The water stop steps are:

[0025] a. Determine the position of the water stop, which is the position set back 1~2m above the water outlet, which is determined as the drilling position.

[0026] b. Use a drilling rig 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, the 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 the 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 ...

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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 water stop and soil improvement for tunnels and foundation pits, and in particular relates to a novel rapid water stop and soil improvement method. Background technique [0002] During the excavation process of foundation pit or tunnel, there are situations of water leakage and sand leakage. In view of this situation at this stage, the way of drilling and pouring polyurethane is generally adopted for plugging. However, the polyurethane foaming process is slow and difficult to control, and it is difficult to deal with large water and sand inrush situations, and a large amount of polyurethane flows out with water during the grouting process, causing serious waste. At the same time, the strength of polyurethane is low, and there is a risk of secondary water and sand inrush. [0003] Before the excavation of the tunnel, the excavation range and the surrounding soil should be improved to meet the excavation ...

Claims

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Application Information

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Patent Type & Authority Applications(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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