自重湿陷性黄土注水增湿试验研究

Water Injection Test in the Collapsible Loess Soils

在兰州新区地下综合管廊一期地基处理工程中,自重湿陷性黄土较厚,最深处可达20m,该黄土呈中等~严重湿陷性。为了验证注水增湿试验处理效果,设置9个实验区对增湿用水量、增湿水分扩散时间及增湿地表沉降进行了监测,并对数据进行了相关研究和分析,总结了不同间距和深度的试验区的注水时长、注水量,研究了注水过程中含水量及沉降变形的变化规律,对西北地区类似工程的处理提供了可借鉴的经验。

The collapsible loess soil deposits underneath the Phase I Underground Utility Project of Lanzhou New District.In order to verify the effectiveness of the water injection method for the wetting collapse potential reduction,9different trial test zones were established.The impact of the water injection spacing,duration of the water injection,as well as the amount of water injected are evaluated and the settlement at the ground surface are correlated.