铁道标准设计Issue(4)：74-77,78,5.DOI:10.13238/j.issn.1004-2954.2014.04.017
深埋双圆盾构隧道的横向地震响应特性研究
Study on Transverse Seismic Response of Deeply-buried Double-O-Tube Shield Tunnel
摘要
Abstract
The basic principle of response displacement method and the stratum load pattern of deeply-buried double-o-tube shield tunnel were described in this study. And then, based on response displacement method and beam-spring model, the structural deformations, internal forces and other dynamical response characteristics of double-o-tube shield tunnel were studied under the action of only static load, as well as under the combined action of static load and horizontal shear seismic load. The study shows that:( a) Compared with those under the action of symmetrical static loads, the structural deformations and internal forces under the combined action of static load plus seismic load are no longer symmetrical. ( b) The bending moment trend is basically the same as the deformation trend. For both the two tubes, at the lining of upper half of the circle in face of the stratum displacement, and at the lining of lower half of the circle not in face of the stratum displacement, there are the deformations towards tube inner and the inner-side-tensioned bending moments; while at the opposite linings, the directions of deformations and bending moments are basically opposite to the above-mentioned. The phenomenon of bending moment concentration is eliminated at the place connecting to the middle pillar bottom. ( c) The axial forces of the lining are no longer all pressure forces but a wide range of tensile forces with greater amplitudes;and there is obvious reduction of pressure forces of middle pillar. ( d ) There is obvious elimination of the phenomenon of shear concentration at the place connecting to the middle pillar, while there is obvious increasing of shear absolute values at the segment lining away from the middle pillar.关键词
双圆盾构隧道/水平剪切地震/反应位移法/横向动力响应Key words
double-o-tube shield tunnel/horizontal shear seismic load/response displacement method/transverse dynamic response分类
交通工程引用本文复制引用
姚超凡,晏启祥,何川,耿萍..深埋双圆盾构隧道的横向地震响应特性研究[J].铁道标准设计,2014,(4):74-77,78,5.基金项目
教育部新世纪人才资助项目(NCET-11-0713) （NCET-11-0713）
国家自然科学基金资助项目(51178400,U1134208) （51178400,U1134208）
