黄土震陷下限深度研究

Study on Boundary Depth of Loessial Seismic Subsidence

摘要:

利用兰州和西安地震小区划黄土震陷数据,获得了这两个地区黄土震陷下限深度预测的经验公式,与实验结果较为吻合。结果显示在一定的地震动条件下黄土的物理指标含水量、固结压力、剪切波速能够比较好的反映黄土震陷特性,通过研究它们与残余应变的关系可以预测黄土震陷下限深度。

Abstract:

The experimental formula for boundary depth of loessial seismic subsidence in Lanzhou and Xi＇an areas is acquired by using the data of seismic micro-zone in both cities, and the result is identical with the test result. It is indicated that the characters of loessial seismic subsidence can be reflected better by physic parameters of loess, such as water contents, concretion stress, shear wave velocity, under certain dynamic condition, and the boundary depth can be predicted by studying relationship between them and residual strain.