摘要
以西安地裂为例,在地震危险性分析的基础上,采用理论解析、数值模拟等手段,开展了地裂缝地震引发的平面扩展效应探讨。研究得出:对复杂破裂场地,破裂损伤岩土体将以剪切形式破裂扩展,新生地震地裂在已有破裂区内随机分布;在未来50年内,西安局部地裂存在地震引发全面活动可能,场地中部的地震地裂危险强于东西两端,城内地震地裂贯通、出露可能性大于城外,平行共线地裂段间距大于60m、雁列次级地裂段间距大于80m时,可考虑中间场地的使用,并初步提出了抗裂方案。
Taking the Xi'an ground fissure for example, based on seismic hazard analysis, and using the method of theoretical resolution and numerical simulation and experiment, this paper studies the ground fissure expansion effect initiated by earthquakes. The paper draws some important conclusions. The failure mode of soil body will be a shear pattern in the fractured site. Fresh seismic fissures will be distributed (randomly). In fifty years, individual fissures have the possibility to renew. The seismic ground fracturing risk in the middle of the site is bigger than that in the around, and bigger in the city than out of the city. The middle yard can be used when the interval of two parallelism ground fissures is bigger than 60 m and the interval of two left-laterial fissures bigger than 80 m. And the scheme of crack arrest is put forward.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第3期237-242,共6页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
地震
破裂
地裂缝
地震地裂
抗裂
earthquake
fracture
ground fissure
seismic ground fracture
crack arrest
