倾斜岩面桩桩端竖向承载力计算方法  

Calculation method of tip vertical bearing capacity of rocksocketed pile on inclined rock surface

作　　者：孙义舟 童建富 齐添 孙宏磊[1] 蔡袁强[1] SUN Yizhou;TONG Jianfu;QI Tian;SUN Honglei;CAI Yuanqiang(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Zhejiang Jinrui Architecture Design Co.Ltd.,Hangzhou 310003,China;Guangzhou Environmental Protection Investment Group Co.Ltd.,Guangzhou 510330,China)

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,浙江杭州310058 [2]浙江金瑞建筑设计院有限公司,浙江杭州310003 [3]广州环保投资集团有限公司,广东广州510330

出　　处：《中南大学学报（自然科学版）》2019年第12期3015-3022,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51478424)~~

摘　　要：针对倾斜岩面上的嵌岩桩桩端承载力计算方法不明确的问题,基于滑移线理论计算方法,建立倾斜岩面桩桩端承载模型,研究其桩端竖向承载机理,提出倾斜岩面桩桩端承载力的滑移线理论解析解,并给出验证算例。在此基础上,研究在不同岩面倾角下桩端承载力和滑动面倾角与嵌入比的关系,并分析岩石抗拉强度与极限嵌入比和最大承载力的关系。研究结果表明:倾斜岩面嵌岩桩存在极限嵌入比;岩面倾角越大,对倾斜岩面嵌岩桩桩端承载力和假定滑动面倾角的影响越显著。Aiming at the problem that the calculation method of tip bearing capacity of rock-socketed pile on inclined rock surface was not clear,an analytical model of rock-socketed pile on inclined rock surface was established based on the theoretical calculation method of slip line theory.The vertical bearing mechanism of rock-socketed pile on inclined rock surface was studied.The analytical solution for the tip vertical bearing capacity of the pile was proposed and verified by existing works.Based on the above research,the relationship between tip bearing capacity of pile and the slip surface inclination and the embedded depth under different rock dip angles was studied.Also,the relationship between rock tensile strength and the ultimate embeddedness with the maximum tip bearing capacity was analyzed.The results show that rock-socketed pile on inclined rock face has limit embeddedness.The bigger the inclination angle of rock surface is,the more significant the influence on the tip bearing capacity and assumed dip angle of sliding surface of rock-socketed pile on inclined rock surface is.

关 键 词：倾斜岩面 嵌岩桩 桩端承载力 滑移线 

分 类 号：TU473.1[建筑科学—结构工程]