1. College of Civil Engineering, Ludong University, Yantai Shandong 264025, China;
2. The 4th Engineering Co. Ltd., of CR20G, Qingdao Shandong 266061, China;
3. Tunnel and Underground Engineering Research Center of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
Analysis of the Sensitivity of Influencing Factors on Tunnel Secondary Lining Structure Stress
SONG Ke-zhi1, LI Fu-xian2, ZHU Lei-min2, WANG Meng-shu3
1. College of Civil Engineering, Ludong University, Yantai Shandong 264025, China;
2. The 4th Engineering Co. Ltd., of CR20G, Qingdao Shandong 266061, China;
3. Tunnel and Underground Engineering Research Center of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
摘要On the basis of the load-structure model and FEM and taking the secondary lining of the Qingdao-Rongcheng intercity railway tunnel as a research object, sensitivity analysis of the influencing factors on the secondary lining's internal forces is conducted via the sensitivity coefficient method. The influencing factors are the elastic resistance coefficient of surrounding rock, the secondary lining thickness, the elastic modulus of secondary lining, and the lateral pressure coefficient, whose values are taken from engineering practice. The analysis result shows that (1) to crown bending moment, the descending order of the sensitivities of the influencing factors are secondary lining thickness, elastic resistance coefficient of surrounding rock, lateral pressure coefficient, and elastic modulus of secondary lining; (2) to crown axial force, the descending order is lateral pressure coefficient, elastic resistance coefficient of surrounding rock, secondary lining thickness, and elastic modulus of secondary lining; (3) to crown vertical displacement, the descending order is elastic resistance coefficient of surrounding rock, secondary lining thickness, lateral pressure coefficient, and elastic modulus of secondary lining; and (4) for the safety factor of the crown cross section, the descending order is elastic resistance coefficient of surrounding rock, lateral pressure coefficient, secondary lining thickness, and elastic modulus of secondary lining.
Abstract：On the basis of the load-structure model and FEM and taking the secondary lining of the Qingdao-Rongcheng intercity railway tunnel as a research object, sensitivity analysis of the influencing factors on the secondary lining's internal forces is conducted via the sensitivity coefficient method. The influencing factors are the elastic resistance coefficient of surrounding rock, the secondary lining thickness, the elastic modulus of secondary lining, and the lateral pressure coefficient, whose values are taken from engineering practice. The analysis result shows that (1) to crown bending moment, the descending order of the sensitivities of the influencing factors are secondary lining thickness, elastic resistance coefficient of surrounding rock, lateral pressure coefficient, and elastic modulus of secondary lining; (2) to crown axial force, the descending order is lateral pressure coefficient, elastic resistance coefficient of surrounding rock, secondary lining thickness, and elastic modulus of secondary lining; (3) to crown vertical displacement, the descending order is elastic resistance coefficient of surrounding rock, secondary lining thickness, lateral pressure coefficient, and elastic modulus of secondary lining; and (4) for the safety factor of the crown cross section, the descending order is elastic resistance coefficient of surrounding rock, lateral pressure coefficient, secondary lining thickness, and elastic modulus of secondary lining.
基金资助:Supported by the National Natural Science Foundation of China(No.51278237)
通讯作者:
SONG Ke-zhi, ytytskz@126.com
E-mail: ytytskz@126.com
引用本文:
宋克志, 李福献, 朱雷敏, 王梦恕. 隧道二衬结构受力影响因素的敏感性分析[J]. Journal of Highway and Transportation Research and Development, 2014, 8(4): 69-75.
SONG Ke-zhi, LI Fu-xian, ZHU Lei-min, WANG Meng-shu. Analysis of the Sensitivity of Influencing Factors on Tunnel Secondary Lining Structure Stress. Journal of Highway and Transportation Research and Development, 2014, 8(4): 69-75.
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2014, Vol. 8 
