昔格达层填料动力特性试验研究

Experimental study on dynamic characteristics of Xigeda fill

昔格达地层力学性质较差,同时广泛分布于地震频发的攀西地区,研究地震荷载作用下昔格达填料的动力特性具有非常重要的理论价值和工程意义。本文以攀西地区昔格达层填料为研究对象,研究了不同固结应力状态对昔格达土的动模量、阻尼比和动强度的影响,得出了昔格达土的动模量与固结应力比呈正相关,阻尼比与固结围压呈负相关,动强度随固结围压的增大而减小的规律。研究成果可以为类似工程提供参考和借鉴。

The mechanical properties of Xigeda strata are poor,and it is widely distributed in Panxi area where earthquakes are frequent.Therefore,it is of great theoretical value and engineering significance to study the dynamic characteristics of the Xigede embankment under earthquake loading.Based on the engineering background of the Xigeda embankment in south Panzhihua station,the effects of different consolidation stress states on the dynamic modulus,damping ratio and dynamic strength of the Xigeda soil are investigated in this study.It is concluded that the dynamic modulus of the Xigeda soil increases with the increase of the consolidation stress ratio,and the damping ratio is negatively correlated with the consolidation confining pressure,and the dynamic strength decreases with the increase of the consolidation confining pressure.The study results can provide the reference for similar engineering.