天水地区某调蓄水库黄土工程特性分析研究

Engineering Characteristics of Loess in Storage Reservoir of Tianshui Area

天水地区某拟建调蓄水库工程区广泛分布中更新统离石黄土及上更新统风积马兰黄土,其工程特性对建基岩体选择、设计方案布置具有重要影响,通过现场地质调查、勘探、取样试验分析等手段,以宏观和微观相结合的方式全面分析研究工程区黄土工程特性,通过分析黄土工程特性与深度、孔隙比、天然含水量、干密度等指标的变化规律,对湿陷性黄土地区存在的工程地质问题提出预防措施和处理建议。

The Middle Pleistocene Lishi loess and the Upper Pleistocene aeolian Malan loess are widely distributed in the engineering area of a storage reservoir in Tianshui area.The engineering characteristics of loess have an important influence on the selection of foundation rock mass and the layout of design schemes,in the engineering area are comprehensively analyzed and studied by means of on-site geological investigation,exploration,sampling test and other means,and the physical and mechanical properties and collapsibility of loess,by analyzing the variation law of loess engineering characteristics and indexes such as depth,void ratio,natural water content,dry density,etc.,preventive measures and treatment suggestions for engineering geological problems existing in collapsible loess areas are put forward.