鸡街地区膨胀土的胀缩影响因素分析

摘要

Through the field drilling sampling, indoor experiment and longtime observation, the water contents in soil layers indoor and outdoor, in rainy and drought seasons, and under different geomorphic conditions are studied, besides, the expansion rate on different conditions of depth and pressure is analyzed, through which the water content in the expansive soil and external load pressure are proved to be the basic factors affecting its expansion and shrink, and the expansion activities of the soil thereof come out in the range of 4. 0m in depth mainly.%通过现场钻孔取样、室内试验及长期观测结果的分析研究，分别对室内和场地、雨季和旱季、不同地貌条件下土层中的含水量进行分析，并在不同深度和压力条件下分析膨胀率，说明了膨胀土中含水量变化和外荷载压力是影响其胀缩量的基本因素，且该区膨胀土主要胀缩活动带在4．0m深度内。