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《Journal of Zhejiang University(Engineering Science)》 2018-05
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Elastic-swelling analytical model of anhydrite rock considering time-dependent effect

REN Song;OUYANG Xun;WU Jian-xun;CHEN Fan;WANG Liang;CHEN Jie;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University;Power China Road Bridge Group Linited Compang;East China Electric Power Design Institute;School of Civil and Environmental Engineering,Beijing University of Science and Technology;  
The elastic-swelling analytic model considering time effect of tunnel through anhydrite rock mass was established based on the humidity stress field theory and the time dependence of anhydrite in order to analyze the tunnel displacement variation rule under the swelling of anhydrite rock.The model was applied to the Lirang Tunnel on Liangzhong highway.Then the quantitative analysis of the displacement variation rule of free face,the ground reaction surface and displacement characteristic surface were obtained.Then the sensitivity analysis of the model parameters was conducted.1)The better of the surrounding rock,the smaller displacement of the free face,thus the tunnel structure is more stable The result accorded well with the practice rule.2)The displacement of the free face was negatively correlated with the tunnel supporting stress and the elastic modulus of surrounding rock,and was positivly correlated with the tunnel hole diameter,the hydrostatic pressure,the water absorption,the rock swelling modulus,the swelling time,the water absorption coefficient,and the linear swelling coefficient.
【Fund】: 国家自然科学基金资助项目(51774057);; 重庆市研究生科研创新资助项目(CYB15011 CYB17046)
【CateGory Index】: U451
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