组合荷载作用下单桩的承载机理研究  

Bearing mechanism of single pile under combined loads

作　　者：李尚飞 赵春风[2] 冼芳任[3] 谢肖礼[3] 

机构地区：[1]广西交通投资集团有限公司,广西南宁530028 [2]同济大学岩土与地下工程教育部重点实验室,上海200092 [3]广西大学土木建筑工程学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2013年第4期969-974,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40972180);上海市重点学科建设资助项目(B308)

摘　　要：为了进一步研究组合荷载作用下单桩极限承载力规律,本文进行了组合荷载作用下单桩极限承载力室内模型试验,通过对采集到的数据进行分析,明确了单桩在组合荷载作用下达到破坏时,单桩极限承载力竖向分量、水平分量和弯矩分量三者之间的关系,总结出了组合荷载作用下单桩的倾斜系数i a和弯矩影响系数i m,结合倾斜系数i a和弯矩影响系数i m提出组合荷载作用下单桩的组合系数i am,用本文提出公式对本文试验和其他学者所做试验进行计算,计算误差都在10%以内,证明了文中所提组合系数的正确性和优越性。本文试验是根据砂土中的长摩擦桩试验结果提出的,结论宜应用在砂土中的长摩擦桩。In order to study the ultimate bearing capacity of single pile under combined loads, model tests on single pile were conducted, and the data that indicates the bearing capacity of single pile were analyzed. The relationship among the vertical component, horizontal component and bending moment component of the ultimate bearing capacity for single pile under combined loads was estab- lished. The inclined coefficient ia and bending moment influence coefficient im of single pile were proposed, which resulted in the combination coefficient iota of single pile under combined loads. The calculated results given by the theory proposed in the paper for the tests and other tests is with a 10% variation a compared with those in actual measurement, demonstrating the validity and superi- ority of the theory. The theory proposed in the paper is suitable for the calculation of the ultimate bearing capacity of over-length frictional single pile in sand.

关 键 词：单桩 组合荷载 承载机理 组合系数 

分 类 号：TU473.1[建筑科学—结构工程]