黄土震陷下限深度研究  

Study on Boundary Depth of Loessial Seismic Subsidence

作　　者：徐舜华[1] 秋仁东[1] 王平[1] 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州73000

出　　处：《西北地震学报》2007年第3期240-244,共5页Northwestern Seismological Journal

基　　金：国家自然科学基金(50379049);兰州地震研究所青年基金项目(2006159);中国地震局兰州地震研究所论著编号:LC20060022

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。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.

关 键 词：黄土震陷 下限深度 含水量 固结压力 剪切波速 残余应变 

分 类 号：P642.27[天文地球—工程地质学] TU435[天文地球—地质矿产勘探]