A kind of silica sol grouting material construction technology

A construction technology and silica sol technology, which is applied in the construction technology field of environmental protection material silica sol, can solve problems such as failure to meet engineering standards, and achieve the effect of improving perfusion quality.

Active Publication Date: 2021-07-27
SINOHYDRO FOUND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the silica sol grouting is carried out through the conventional silica sol grouting process, it still cannot meet the engineering standards

Method used

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  • A kind of silica sol grouting material construction technology
  • A kind of silica sol grouting material construction technology
  • A kind of silica sol grouting material construction technology

Examples

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Embodiment Construction

[0029] The present application will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0030] Please refer to image 3 According to the dam foundation engineering design of Miaowei Hydropower Station, four reinforcement grouting holes are arranged around No. Z-7 survey hole (dam 0+230m), and the hole numbers are 3-L(Z2)R1-20 and 3-L(Z2)R1 respectively. -21 and 3-L(Z2)R2-20, 3-L(Z2)R2-21 are arranged in a rectangular shape with the Z-7 survey hole as the center, the hole spacing is 1.0m, the row spacing is 0.75m, and the left and right sides The Z-7 exploration hole is 0.5m apart.

[0031] The reinforcing grouting cement grouting hole adopts th...

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Abstract

This application relates to the construction process of silica sol, an environmental protection material, and discloses a construction process of silica sol grouting material, which adopts a top-down segmental grouting method, including a silica sol double-liquid grouting step; the silica sol double-liquid grouting step includes the following three steps Stage: The first stage: pour slow grout into the grouting hole, and squeeze out the water in the grouting hole; the second stage: use the designed grouting pressure of 2.0-2.5MPa to pour slow grout to realize the permeable grouting of the crack; the third stage: when The slow grout injection rate reaches 6-8L / min, replace the slow grout with fast grout, control the fast grout injection rate within 15L / min, increase the design grouting pressure to 2.5-3.0MPa; After 200L, close the pulp with pressure to make the fast pulp gel. The fast grout quickly gels to close the micro-cracks, and the slow grout is blocked in the micro-cracks to prevent the ungelled slow grout from being squeezed out of the cracks after the grouting is stopped, thereby improving the grouting effect.

Description

technical field [0001] The application relates to the construction technology of silica sol, an environmental protection material, and in particular to a construction technology of silica sol grouting material. Background technique [0002] In curtain grouting technology, usually, larger cracks are grouted with cement grout, which has low cost, long operation time and convenient construction. However, for fine cracks (such as cracks smaller than 0.1 mm, or even cracks smaller than 0.05 mm), it is difficult to pour cement grout, and it is usually better to use silica sol grouting material at this time. However, under complex geological conditions with high water head, large water gushing, and densely developed micro-cracks, such as the curtain grouting of the dam foundation of Miaowei Hydropower Station, the effect of conventional silica sol grouting still cannot meet the requirements. The geological conditions of the dam foundation of Miaowei Hydropower Station are complex,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B7/00E02B3/16E02D15/04E02D15/06C04B28/00C04B28/34C04B30/00C04B111/70
CPCC04B28/005C04B28/344C04B30/00C04B2111/70E02B3/16E02B7/00E02D15/04E02D15/06C04B24/04C04B24/38C04B22/124C04B22/10
Inventor 谢武肖恩尚江志安赵明华唐玉书孙亮吴金伟
Owner SINOHYDRO FOUND ENG
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