【作者】 孙钧； 李成江；

【Author】 Sun Jun Li Chengjiang (Torgji University)

【机构】 同济大学；

【摘要】 结合桌水电站高压引水隧洞工程的设计需要,本文提出了在复合膨胀岩体中考虑其流变性态和渗流效应的数值计算方法。通过岩体膨胀试验,建议了与流变相耦合的力学模型,并对粘弹塑性围岩——支护系统进行了二维有限元分析,确定了地场渗透压力、膨胀围压、洞周变形和应力分布。对揭示这类复杂围岩的失稳及其支护的受力机理都很有助益。更多还原

【Abstract】 As the design requirement of a high pressure diversion tunnel for a hydropower station,a numerical calculation method which is considered the Theological behaviour and the water-osmotic effect in composite swelling rock mass is suggested in this paper.Through the experiments of rock mass dilatation a mechanical model for swelling rock coupled with its creep effect is established and a two dimentional finite element analysis is carried out for the viscous elastoplastic surrounding rock-tunnel supporting system to determine the ground permeating force,swelling pressure,tunnel peripheral deformation and its stress distribution.It is very helpful to understand the stability loss or the structure failure of such complex rock mass as well as the stress mechanism of its lining support.更多还原