摘要
基于圆柱面与幂函数形式曲面的复合滑裂面假设,利用克服土体重力和破坏面摩阻力的极限平衡法,推导出扩底桩在均质和分层地基中极限抗拔承载力的计算公式。假设滑移面下部为与扩底直径相同的圆柱型破坏面,上部为幂函数形式的曲面,且与圆柱面相切,在地表面与水平面呈(?/4-?/2)角度破坏。利用Matlab实现该简化公式的数值积分程序编制,并以工程实例验证上述简化公式,计算结果与工程实测结果较为接近。提出的简化计算公式可为扩底桩的抗拔承载力的计算提供依据。
A reasonable formula for calculating the uplift capacity of belled piles is proposed for both cases of homogeneous and stratified foundations. It is assumed that the slippage failure surface consists of the cylindrical surface and the exponential curved surface. The formula is deduced by using the limit equilibrium methods. Moreover, its numerical integration is carried out through Matlab. Engineering examples are employed to verify the proposed formula. The results agree with the actual ones very well.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期928-931,共4页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(41202193
41272295)
上海市浦江人才计划(11PJ1410100)
上海市重点学科建设项目(B308)
关键词
扩底桩
抗拔承载力
极限平衡法
belled pile
uplift capacity
equilibrium method
