Long-term settlement of tunnels across a river induced by vehicle operation
LIU Ming1,2,HUANG Mao-song1,3,LIU Yan-hua1,3
1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;2.State Key Laboratory for Geomechanics & Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221008,China;3.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China
Abstract：With rapid development of river tunnel engineering,long-term settlement of soft ground induced by traffic operations has caused high concerns.For the propose of analyzing long-term settlement of saturated soft clay ground under traffic loading,simplified methods based on semi-empirical models for predicting the accumulative deformations of soft clays are usually preferred.A new empirical model is proposed in order to simulate cumulative plastic strain and pore pressure of anisotropically consolidated soft clays based on undrained cyclic triaxial tests,which extends a semi-empirical formulation previously presented by the authors for isotropically consolidated clays.Unlike the previous model,a new formulation is introduced to take effects of initial K0-consolidated stress state into consideration.Parameters of the empirical model are determined based on undrained cyclic triaxial tests on anisotropically consolidated Shanghai soft clay.Based on the layer-wise summation method,a simplified method is suggested to calculate the long-term settlement of soft ground caused by traffic loading.Analysis for settlement of a typical river tunnel project is presented to demonstrate the new method
刘明;黄茂松;柳艳华. 车振荷载引起的软土越江隧道长期沉降分析[J]. 岩土工程学报, 2009, 31(11): 1703-1709.
LIU Ming1,2,HUANG Mao-song1,3,LIU Yan-hua1,3. Long-term settlement of tunnels across a river induced by vehicle operation . Chinese J. Geot. Eng., 2009, 31(11): 1703-1709.
