用数值模拟研究西安地裂缝  

Study of ground fissures in Xi'an by using numerical simulation

作　　者：易学发[1] 苏刚[1] 王卫东[1] 唐俊昌 

机构地区：[1]陕西省地震局 [2]陕西省科委

出　　处：《水文地质工程地质》1999年第5期33-36,共4页Hydrogeology & Engineering Geology

基　　金：陕西省科学技术委员会资助

摘　　要：本文在分析总结西安地裂缝基本特征的基础上，采用二维有限元法，对西安地裂缝进行了数值模拟。结果给出，西安地裂缝从空间分布上虽受地形地貌和断裂构造局部地段的准静态控制，但其形成发展和剧烈活动与西安市区强采地下水而引起的地面不均匀沉降直接有关。故可认为，西安市区只有通过对地下承压水的合理均衡开采，控制西安市区地面的不均匀沉降。In this paper,based on the analysis of basic features of ground fissures in Xi'an,the numerical simulation of ground fissures in Xi'an is made by using two dimensional finite element method.The results show that although the spatial distribution of ground fissures in Xi'an is para statically controlled by topographic expression and the local faults,the inhomogeneous ground subsidence induced by over extraction of confined groundwater is the primary cause of ground fissures in the Xi'an city.So,extraction of confined groundwater in a reasonable way to control the inhomogeneous ground subsidence is a fundamental way for reduction or basic control of the activity of ground fissures in Xi'an.

关 键 词：数值模拟 地裂缝 形成机制 西安市 

分 类 号：P542.3[天文地球—构造地质学]