颜庆智¹，刘太强¹，付长波²
(1 中国石油大学储建学院，青岛266555; 2 海工英派尔工程有限公司，青岛266061)

[摘要] 采用水泥土的无侧限抗压强度计算单桩极限承载力，采用汉森公式计算桩问土极限承载力，按面积置换率复合法确定粉喷桩复合地基的极限承载力，以直接分析法建立了粉喷桩复合地基承载力极限状态方程。并结合工程实例，进行了粉喷桩复合地承载力可靠度影响因素的分析。
[关键词] 粉喷桩复合地基；随机变量；可靠度指标

Study of bearing capacity by Hansen formula and analysis on reliability of dry jet mixing pile composite foundation
Yan Qingzhi¹, Liu Taiqiang¹, Fu Changbo²
(1 China University of Petroleum, Qingdao 266555, China; 2 COOEC-ENPAL Engineering Co., Ltd., Qingda0 266061, China)

Abstract: Single pile capacity was calculated by way of unconfined compressive strength of cement-clay in capacity reliability of dry jet mixing pile composite foundation. Hansen formula was also applied for pile clay capacity. Meantime, capacity and lim/t state equation of dry jet nuxing pile composite foundation is established respectively by area ratio formula and direct analysis method. Finally, by the impact of capacity reliability of dry jet mixing pile composite foundation,  influencing factors were studied by way of practical engineering examples.
Keywords: dryjet mixing pile composite foundation; random variable; reliability index