湿陷性黄土试坑浸水试验中土压力变化特征分析

摘要

通过在山西运城湿陷性黄土地区进行的现场试坑浸水试验,首次将土压力数据传感器引入浸水试验当中,较为精确记录了试验过程中不同深度土层的土压力的变化特征,并将此变化特征与试验沉降观测数据进行了对比分析,了解了二者之间的变化方式及规律,从而阐明了湿陷性黄土遇水发生湿陷而产生沉降变形的临界条件及时间点,即沉降或突降的发生一般是在土层压力变化至最小或接近最小的时段.%Field trial pit water immersion test was conducted in the collapsible soil area in the Yuncheng area in Shanxi Province. The earth pressure sensor is used to record and collect pressure data of the soil pressure al different soil depths and the variation characteristics of settlement observation and experiment data were analyzed to understand the changes in pressure and setlement. The results show that the sudden drop occurred at the time when the soil pressure changes to a minimum level or is close to it. Such changes in the loess areas have a certain reference and reference value in engineering and constructions.