永登5.8级地震中黄土震陷灾害的探讨  

Discussion on the Loess Subsidence Disaster Caused by the Yongdeng M5.8 Earthquake

作　　者：王峻[1] 王兰民[1] 李兰[1] 

机构地区：[1]中国地震局地震预测研究所兰州科技创新基地

出　　处：《地震研究》2005年第4期393-397,共5页Journal of Seismological Research

基　　金：国家自然科学基金(50379049)资助

摘　　要：在1995年兰州永登发生的5.8级地震中,震区产生了严重的黄土震陷灾害。为了研究震区黄土震陷灾害的成因,对震区黄土进行了土工试验和土动力学试验,探讨了该区黄土的基本物理力学指标和土动力特性参数与黄土易损性的关系,分析了易损性与震区黄土震陷灾害的关系。经过多指标综合分析研究发现,震区黄土的易损性大,震陷性强。利用黄土震陷试验分析计算预测方法对震区黄土场地的震陷量进行预测研究,所得结果与实际地震的震陷量符合较好。The 1995 Yongdeng M5.8 Earthquake caused serious loess subsidence disaster. In order to analyze the genesis of loess subsidence, we discussed the relationship between the loess vulnerability and its physical indices and dynamic characteristic parameters, the effect of loess vulnerability on loess subsidence disaster based on conventional soil mechanic test and soil dynamic test. It is concluded with multi-indices analysis that the loess in the seismic area is vulnerable and easy to subside. The subsidence amount of the loess site was calculated using loess earthquake subsidence predicting method. The results coincide well with the observed subsidence amount during the earthquake.

关 键 词：黄土 易损性 震陷灾害 永登地震 

分 类 号：TU435[建筑科学—岩土工程]