博士学位论文摘要　结合兰州地区黄土的特点 ,分析总结了不同施工活动对土体扰动的影响因素 ,系统研究了受施工振动土体的工程性质 ,获得以下主要成果 :(1)受施工活动的扰动影响 ,引起土体应力状态、应力路径的改变 ,土体的孔隙比、含水量及压密固结状态发生变化 ,某些施工方法 Based on the characteristics of loess in Lanzhou area, this paper analyzes and summarizes the influencing factors of soil disturbance caused by different construction activities and systematically studies the engineering properties of the soil under vibration. The main results are as follows: (1) Disturbed by the construction activities Affect, causing the soil stress state, the change of the stress path, the soil porosity ratio, water content and consolidation status changes, some of the construction methods