具体场地活动断层定位及其工程意义

LOCATION OF THE ACTIVE FAULT IN A SPECIFIC SITE AND ITS ENGINEERING SIGNIFICANCE

对乌鲁木齐市蔬菜副食品总公司酿造厂场地内雅玛里克活动断层的精确定位和活动性判定工作进行了讨论 ,确定了雅玛里克断裂为全新世早期活动断裂 ,倾斜速率为 0 .2 6～ 0 .37mm/ a。该断裂现代仍有小量级地震活动 ,目前主要以蠕滑为主 ,属中等全新世活动断层 ,场地内不宜进行重大工程建设。并确定了雅玛里克南支断层破碎带宽度小于 15m,其上盘影响带宽度为 35m。与前人工作的结果进行对比差别是明显的 ,为此从单体工程设施安全性和城市土地规划经济合理性方面探讨了活动断层精确定位工作的意义和重要性。

Yamalike Fault crosses the Winery of Urumqi Vegetable Foodstuffs Compan y.To detect its accurate position in this site,four kinds of physical and chemic al prospectin g means were used.It is found that the rupture zone of south branch of the Yamal ike fault has a width less than 15 m,and the fault-affected zone in the upper s ide is as wide as 35 m.This is obviously different from the results of predeces sors' work.It is thought that accurately locating active faults is important and significant for city land planning and engineering construction.In addition,the activity of the fault was studied in this paper.It is thought that the Yamalike fault is an active fault of early Holocene,with a dip-slip rate of 0.26~0.37 mm /a.Even in the contemporary age,there is still low-level seismic activity in th e fault,so the site is not fit for major construction.