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《Chinese Journal of Underground Space and Engineering》 2017-03
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Release Law of the Displacement and Stress for the Soft-rock Tunnels

Liu Naifei;Li Ning;Guo Xiaogang;Ran Jianxi;Zhang Yan;Institute of Geotechnical Engineering,Xi'an University of Technology;Xinjiang Investigation,Design and Research Institute of Water Conservancy and Hydropower;School of Architecture and Civil Engineering,Xi'an University of Science & Technology;  
Because of the poor strength and lack of self-supporting ability of soft rock,it is easy to cause landslide in tunnel construction and create loss of life and property.Therefore,the study on the releasing rules of the displacement and stress of underground cavern is very important.The displacement variation of surrounding rock when the face is advancing and the stress release rule are studied by using two-dimensional numerical analysis scheme.This study shows that:(1) the release coefficient of displacement is less affected by the depth,diameter and shapes of the tunnel and is significantly impact by lithology;(2) the displacement release curve against the stress release ratio can be roughly divided into three phases and the stress release ratio increases with the weaken of lithology;(3)the main release stage of stress is in-1D~1D of the analytic section and the rate of stress relieving increases with the decrease of lithology;(4) the supporting effect is more significant for the tunnel in poor surrounding rock.
【Key Words】: soft-rock tunnel numerical experiment stress release ratio displacement release ratio
【Fund】: 国家自然科学基金(51179153 51509200);; 西安理工大学博士学位论文创新基金(310-11202J306);; 西安科技大学培育基金(2014036)
【CateGory Index】: TV554;U451
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【Co-citations】
Chinese Journal Full-text Database 9 Hits
1 Liu Naifei;Li Ning;Guo Xiaogang;Ran Jianxi;Zhang Yan;Institute of Geotechnical Engineering,Xi'an University of Technology;Xinjiang Investigation,Design and Research Institute of Water Conservancy and Hydropower;School of Architecture and Civil Engineering,Xi'an University of Science & Technology;;Release Law of the Displacement and Stress for the Soft-rock Tunnels[J];地下空间与工程学报;2017-03
2 Li Sheng;Zheng Yingren;Wu Yingxiang;Dept.of Civil Engineering,LEU;;Design and Calculation of Anchor and Shotcrete Support for Dome Cylinder Tank Room of Underground Oil Storage[J];地下空间与工程学报;2017-03
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