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| Rapid construction technology of single-layer lining for super-large-span hyperboloid dome caverns(groups) |
| ZHANG Xinsheng1, WANG Shengtao1, ZHANG Junru2*
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1. The Fifth Construction Ltd. of China Tiesiju Civil Engineering Group, Jiujiang 332000, Jiangxi, China;
2. Key Laboratory of Traffic Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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Abstract The super-span hyperboloid dome has the characteristics of large section, low flat rate and complex contour. To solve the problems of low construction efficiency, high construction risk, and inconvenient construction equipment, the construction technology of super-span hyperboloid dome cave storage was studied. A method combining engineering investigation, numerical calculation and on-site monitoring was adopted. The geological situation and design overview of the project were introduced, the overall construction sequence and subsection excavation plan were given, combined with the design characteristics, the corresponding key technologies were summarized, and the rapid construction technology suitable for the super-span hyperbolic dome cavern was proposed. The following conclusions were drawn: the rapid construction technology researched in this research was applied to the site to achieve a monthly excavation volume of 9 600 m3. Shotcrete had high flatness and no water leakage. The on-site stress and deformation monitoring showed that the structure was stable under stress, with small deformation and good supporting effect, which could provide valuable experience for similar projects.
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Received: 07 January 2022
Published: 20 June 2022
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