基于含水率变化的黄土场地震陷评价预测

发布时间：2018-05-31 13:47

  本文选题：土力学 + 黄土　； 参考：《岩石力学与工程学报》2015年10期

【摘要】：含水率变化对黄土的震陷特性有着重要影响,其影响变化规律对黄土场地震陷的评价和预测工作具有重要意义。通过开展一系列不同含水率条件下原状黄土的动三轴试验,分析了含水率变化对黄土震陷的影响变化规律,并借此给出采样黄土场地震陷性的评价结果和不同含水率条件下的震陷性预测结果。研究表明:震陷系数随动应力和土样含水率增加而增大,震陷临界动应力随含水率的增加而减小;不同性状黄土震陷性质差别较大,该场地土含水率≤5%时,在VII,VIII度地震作用下基本不发生震陷;含水率5%以后,在VIII度地震作用下将产生震陷灾害。
[Abstract]:The variation of water content has an important influence on the seismic subsidence characteristics of loess, and its influence law is of great significance to the evaluation and prediction of seismic subsidence in loess field. Based on a series of dynamic triaxial tests of undisturbed loess under different water content conditions, the influence of water content change on loess seismic subsidence is analyzed. The evaluation results of seismic subsidence in loess field and the prediction results of seismic subsidence under different water cut are given. The results show that the seismic subsidence coefficient increases with the increase of dynamic stress and soil moisture content, and the critical dynamic stress decreases with the increase of soil moisture content, and the seismic subsidence properties of loess with different properties vary greatly, when the soil moisture content of the site is 鈮，

本文编号：1959959