摘要
反复冻融作用使土体微结构破坏和强度降低,是黄土地区窑洞病害发生的主要原因。通过有限元计算,分析了冻融作用下不同上覆土层厚度对窑洞灾害的影响规律。结果表明:重复冻融次数对窑洞病害的影响比较明显;在经历相同冻融历时情况下,覆土厚度的增加可以降低窑洞的冻融病害。
The soil micro-structure is damaged and soil strength is reduced after repeated freeze-thaw action,which is the main reason for the disaster in loess cave region.Via the finite element method,the influence law of the freeze-thaw action under different upper soil thickness on the disaster of loess cave is analyzed in detail.The results indicate that the effect of the number of repeated freeze-thaw action on the cave＇s disaster is more obvious;In the same frozen-thaw action,the increase of the soil thickness could reduce the cave＇s disaster.
出处
《水利与建筑工程学报》
2012年第6期124-127,共4页
Journal of Water Resources and Architectural Engineering
关键词
冻融作用
上覆土层厚度
黄土窑洞
有限元法
freeze-thaw action
upper soil thickness
loess cave
finite element method
