Combined bearing double-layer well wall and construction method thereof

A construction method and technology for outer well wall, which are applied in vertical shaft equipment, earth-moving drilling, wellbore lining, etc., can solve the problem of inability to improve the filling effect of inter-wall grouting on the seepage channel of well wall, etc., and achieve a favorable grouting effect. , Improve the sealing water performance and increase the effect of grouting pressure
CN113202480AActive Publication Date: 2021-08-03CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Publication Date
2021-08-03

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Abstract

The invention discloses a combined bearing double-layer well wall and a construction method thereof, and belongs to the technical field of double-layer well wall construction. The combined bearing double-layer well wall comprises an inner-layer well wall and an outer-layer well wall, the outer-layer well wall is formed by tunneling and pouring in sections, and construction joints exist between the sections of the outer-layer well wall; the inner-layer well wall is formed by continuous casting; and a gap is formed between the inner-layer well wall and the outer-layer well wall, and a micro-expansion grouting material is injected into the gap to form a micro-expansion interlayer. The micro-expansion grouting material is adopted for grouting between the inner-layer well wall and the outer-layer well wall, and the solidified slurry can tightly bond the inner-layer well wall and the outer-layer well wall and compactly fill water seepage channels in the outer-layer well wall and the stratum close to the well wall.
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Description

technical field

[0001] The invention belongs to the technical field of double-layer shaft wall construction, and in particular relates to a joint bearing double-layer shaft wall and a construction method thereof. Background technique

[0002] Wellbores in water-rich formations in my country are often excavated by artificial freezing, and double-layer reinforced concrete well walls (referred to as "double-layer well walls") or double-layer reinforced concrete composite well walls with plastic interlayers (referred to as "double-layer composite well walls") are often used. well wall") for support. The wellbore is the lifeline connecting the ground and the underground. Therefore, within the service life, the wellbore as a support structure must have strong bearing capacity (withstand formation and groundwater pressure) and high water sealing performance (the water inflow from the wellbore should meet the use requirements).

[0003] The double-layer well wall is composed of inne...

Claims

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