Computation method for long-term surface and subsurface settlements induced by excavation of tunnels in clays
YANG Min1, 2, HUANG Ju1, 2, SUN Qing1, 3, LIU Kan1, 2, ZENG Ying-jun1, 4
1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Technical Center, China Construction Third Engineering Division, Co., Ltd., Wuhan 430070, China; 4. Shanghai No. 2 Municipal Engineering Co., Ltd., Shanghai 200065, China
Abstract：Based on the Mair's theory of immediate settlement of soil due to tunneling, and the results of finite element simulation, a computation method for the long-term settlement of the soil at surface and subsurface is proposed. Ong’s centrifuge test is simulated first to verify the validity of the finite element model, then a numerical study on the long-term settlement of the soil at different depths is carried out. The relationship between ground losses under immediate and long-term conditions is established. Formulas for width parameter and the maximum settlement of settlement trough at different depths are also given, and the profile of settlement trough can be determined. Compared with the field measurement and numerical simulation, the validity of the proposed method is demonstrated. It can be employed in practical projects.
杨 敏, 黄 炬, 孙 庆, 刘 侃, 曾英俊, . 黏土中隧道开挖引起的地表及地表以下土体长期 沉降计算方法[J]. 岩土工程学报, 2012, 34(2): 217-221.
YANG Min, HUANG Ju, SUN Qing, LIU Kan, ZENG Ying-jun, . Computation method for long-term surface and subsurface settlements induced by excavation of tunnels in clays. Chinese J. Geot. Eng., 2012, 34(2): 217-221.
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