水泥搅拌桩单桩承载力影响因素研究

Research on Bearing Capacity for Its Influencing Factors of Single Cement-mixed Pile

目的水泥搅拌桩单桩承载力的大小对复合地基承载力的大小起着举足轻重的作用.但是很多试验实测结果表明:在复合地基中,单桩承载力发挥值均没有达到理论计算值.因此有必要对水泥搅拌桩单桩承载力的影响因素进行研究.方法通过对某道路工程水泥搅拌桩钻芯取样试验研究.结果总结出钻芯取样扰动、桩距大小、场地地质差异等因素均影响水泥搅拌桩单桩承载力.结论:针对水泥搅拌桩复合地基单桩承载力计算公式提出改进意见,为水泥搅拌桩复合地基的设计提供一定的参考.

Objective The bearing capacity of the single pile in the composite foundation is very important for cement-mixed pile.But many tests indicated that the bearing capacity of the single pile did not reach the theoretical calculation value.So it is necessary to research the bearing capacity for its influencing factors of single cement-mixed pile.Methods This paper studies core-drilling test of single cement-mixed pile by way of the road.Results The results indicate that influencing factors of single cement-mixed pile are the moving core-drilling,the size between piles and different geology.Conclusion Some suggestions are made on the improvement of the bearing capacity formula of the single cement-mixed pile in the composite foundation of cement-mixed pile,which provides some references for the design of the composite foundation of cement-mixed pile.