预浸水法消除大厚度自重湿陷性黄土地基研究

Study on prewatering method to eliminate collapsibility of thickness self weight loess ground soil

为了在大厚度自重湿陷性场地建筑水利工程,基本消除黄土的湿陷性,通过在宁夏固海扩灌十一泵站场地进行预浸水的试验研究,观测了湿陷量与浸水时间关系、耗水量与浸水时间关系、场地变形量,以及处理效果检测与评价,得出大厚度自重湿陷性黄土场地经过一定的预浸水后,黄土自重湿陷量全部消除,地基呈中压缩性,承载力特征值为150kPa的结论.为同类工程建设提供可以借鉴的经验.

In order to eliminate the collapsibility of thickness self weight collapsibility loess ground in the hydraulic engineering project,the paper discussed prewatering method through experimant in No.11 Pumping Station of Guhai Extending Irrigation Area in Ningxia,explained the relation of collapsibility and watering time, water consumption and watering time, ground soil deformation, and result examination and evaluation. The test showed collapsibility of thickness self-weight collapsibility loess ground soil disappeared entirely after prewatering;the ground soil was medium compressibility,living load which bearing capacity value was 150 kPa. The experience provides reference to the same kind of construction project.