中国铁道科学2018，Vol.39Issue(2)：61-70,10.DOI:10.3969/j.issn.1001-4632.2018.02.08
穿越活动断层隧道组合抗震缝定量设置的计算公式及试验验证
Calculation Formula and Test Verification for Quantitative Setting of Combined Seismic Joint for Tunnel through Active Fault
摘要
Abstract
According to the anti-dislocation requirements for tunnels through active faults and the geometric deformation characteristics of tunnel lining segment during fault dislocation,formulas for calculating the number of combined seismic joints on tunnels were established based on such parameters as the hade,width and displacement of active faults.A laboratory test model with the similarity ratio of 1 ∶ 30 was set up under the background of Shiziyuan Tunnel engineering of Chengdu-Lanzhou Railway passing through the central active fault of Longmen Mountain.Considering 2 cases,the normal lining and the lining determined by the combined seismic joint in terms of the calculation results of this article,the indoor model test for the dislocation of reverse fault was carried out.Results show that in the fracture zone of active fault and at its both sides,compared with normal lining,the maximum longitudinal strain of the lining with combined seismic joint for anti-dislocation is greatly reduced,the maximum circumferential strain is reduced in varying degrees,and the maximum contact pressure between the lining and surrounding rock decreases with a reduced variation range.Besides,at the end of the test,large-scale transverse or longitudinal cracks,lining spalling and lining collapse do not occur along the longitudinal direction of tunnel model.The correctness and effectiveness of the calculation formula for the quantitative setting of combined seismic joint are verified by test results.关键词
隧道工程/活动断层/穿越断层/计算公式/组合抗震缝/模型试验Key words
Tunnel engineering/Active fault/Through fault/Calculation formula/Combined seismic joint/Model test分类
交通工程引用本文复制引用
孙风伯,赵伯明,杨清源,王子珺..穿越活动断层隧道组合抗震缝定量设置的计算公式及试验验证[J].中国铁道科学,2018,39(2):61-70,10.基金项目
国家自然科学基金高铁联合基金资助项目(U1434210) （U1434210）
铁道部科技研究开发计划项目(2010G018-C-1) （2010G018-C-1）
