花花岩组滑坡堆积体蠕变特性研究OACSTPCD

The Huahuayanzu landslide is an accumulation landslide.The slide body of this landslide consists of loose soil and rock accumulations.It has obvious creep characteristics in the slow deformation of the landslide.To study the creep characteristics of the landslide deposit and determine its long-term strength index,direct shear creep tests were conducted on the landslide deposit.The results are as follows.The landslide accumulation exhibits obvious deceleration creep and steady-state creep characteristics in direct shear creep tests.Under larger horizontal loads,it will enter an accelerated creep state.The creep curve was fitted by Burgers model and improved Burgers model.The results show that the improved Bur-gers model can better fit the nonlinear accelerated creep process,and the fitting curve is closer to the actual creep curve.The long-term strength range of landslide deposits is determined by the transition creep method.The long-term strength of landslide deposits is 39%to 59%of its instantaneous shear strength.