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| Reinforcement scheme based on large deformation of a pile-anchored enclosure structure |
| HE Sijin1, ZHAO Yixing2*, ZHANG Huipeng1, RAO Kai1, YUAN Congcong2, SHI Yufeng1,2
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1. Nanchang Rail Transit Group Co., Ltd., Nanchang 330013, Jiangxi, China;
2. Jiangxi Key Laboratory of Geotechnical Engineering Infrastructure Safety and Control, East China Jiaotong University, Nanchang 330013, Jiangxi, China |
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Abstract The stratum of a certain foundation pit in Jingdezhen is mainly pebble and limestone. In order to meet the requirements of construction operation space and construction schedule, the original design plan adopts a pile-anchored enclosure structure. During the excavation of the foundation pit, the enclosure structure was deformed greatly, threatening the safety of the project, and relevant measures need to be taken for protection. The possible causes of the larger deformation of the retaining structure, and the results showed that the larger deformation of the retaining structure was caused by the failure of the prestressed anchor cable. In view of the current situation, a solution of constructing a local main structure with temporary internal bracing was proposed, and the finite element numerical method was used to simulate the support effect of the original retaining pile and the improved plan. The research showed that the improved scheme could effectively control the deformation and bending moment of the retaining pile, and met the requirements of the corresponding monitoring and measuring early warning value, which could provide reference for related projects.
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Published: 25 February 2021
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