湿陷性黄土场地预浸水后的软基处理

Processing method of prewatering self-weight collapsibility loess ground

宁夏湿陷性黄土强烈地区———固海扩灌扬水十泵站设计中,经对其场地预浸水处理后,黄土自重湿陷性全部消除,但地基水分疏干十分缓慢,承载力低,严重影响了工程建设.为了解决场地预浸水后的软基问题,对十泵站场地又采用粉喷桩进行第二次地基处理,使泵站地基最终达到了设计要求.通过十泵站特殊地基问题的处理,重点介绍了粉喷桩在预浸水后软基中的应用,可以为同类工程地基处理提供借鉴.

The self-weight collapsibility eliminated after prewatering processing the ground in No.10 Pumping Station of Guhai Extend Irrigation Area in Ningxia,but the water in groundwork soil drained away very slowly,and groundwork loading capacity was comparatively low,which seriously affected the schedule of engineering construction. For figuring out how to solve the problem,the powder-spraying-stake in No.10 Pumping Station was adopted again. The application of the powder-spraying-stake in prewatering soft ground made the groundwork loading capacity come to a designed request.The experience may be used for reference to the same kind of construction project.