A shaft construction method

By applying advanced support at the wellhead section and applying the two-lift and middle partition method from the bottom of the well from bottom to bottom, the problems of low construction efficiency and poor stability of the vertical shaft under adverse geological conditions are solved, and stable and efficient construction under harsh conditions are achieved.

CN114251098BActive Publication Date: 2025-03-25CHINA FIRST HIGHWAY ENGINEERING CO LTD +1
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Patent Information

Application Number
CN202111474073.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-12-02
Publication Date
2025-03-25
Estimated Expiration
2041-12-02

AI Technical Summary

Technical Problem

Under unhealthy geological conditions, it is difficult for the prior art to effectively construct vertical shafts, resulting in low construction efficiency and poor stability.

Method used

A vertical shaft construction method is adopted, including wellhead section construction, advance support, wellbody excavation, molded concrete forming wellbody first lining, horsehead door construction, and the use of split-flap mechanical integrated sliding form method from bottom to top to use the well body second lining and middle partition plate.

Benefits of technology

Through advanced support and composite lining structure, the stability and waterproofness during the well body excavation process are enhanced, construction efficiency and safety are improved, and vertical shafts can be successfully constructed under harsh natural conditions.

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Abstract

The present application provides a shaft construction method, which solves the technical problem of poor stability during the construction process when the shaft is constructed according to the general method under adverse geological conditions in the prior art. The shaft construction method provided by the present application applies advance support to the wellhead section before the well body is excavated, thereby enhancing the stability during the subsequent well body excavation process; in addition, after the horse head gate is constructed, the second well body lining and the middle partition are constructed from the bottom to the top of the well using a split-petal mechanical integrated sliding form method, that is, the shaft is a composite lining, consisting of a primary lining and a secondary lining, wherein the primary lining is a load-bearing structure, and the secondary lining is for decoration, waterproofing and other auxiliary functions, which enhances the stability and waterproofness of the shaft, and can also be used as a safety reserve and reduce ventilation resistance during operation.
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