复杂场地地质条件下地震安全性评价工程实例探讨

地震安全性评价工作中多个钻孔发现断层角砾土层,因此判断工程场地地下存在断裂破碎带。通过浅层人工地震反射纵波、反射横波方法联合勘探,对工程场地所处位置的地质构造进行详细探察,确定断层位置及产状和规模。结合测年方法确定断层的活动年代,为工程项目建设提供参考依据,最终合理确定工程场地抗震设防参数。

A DISCUSSION ON THE SEISMIC SAFETY EVALUATIONEXAMPLE AT THE COMPLEX GEOLOGIC CONDITION ENGINEERING SITE

Engineering site ought to exist fault fracture zone because fault breccias was found in many drill holes in the work of seismic safety evaluation. Particularly explored the engineering site’s geological structure and make clear the position, attitude, scale of faults by the method of shallow seismic exploration reflected P-wave and reflected S-wave. Afford gist to construction object by shallow seismic exploration combined ESR confirm the fault activity age, and afford reasonable seismic fortification parameter of engineering site at last.