嵌岩桩水平承载力计算方法的分析比较  

Analysis and comparison of approaches for determining horizontal bearing capacity of rock-socketed pile

作　　者：赵学亮[1,2] 张景斐 黄钺 何润财 王洪庆 田伟辉[4] ZHAO Xueliang;ZHANG Jingfei;HUANG Yue;HE Runcai;WANG Hongqing;TIAN Weihui(Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education,Southeast University,Nanjing,Jiangsu 211189,China;School of Civil Engineering,Southeast University,Nanjing,Jiangsu 211189,China;Guangdong Electric Power Design Institute Co.,Ltd.,China Energy Engineering Group,Guangzhou,Guangdong 510663,China;Northwest Engineering Corporation Limited,PowerChina,Xi′an,Shaanxi 710065,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京211189 [2]东南大学土木工程学院,江苏南京211189 [3]中国能源建设集团广东省电力设计研究院有限公司,广东广州510663 [4]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《江苏大学学报（自然科学版）》2023年第3期359-366,共8页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助面上项目(51678145)。

摘　　要：对现有的嵌岩桩水平承载力的计算方法及理论,包括地基反力法和弹性连续体法等进行了分析阐述,基于现场原位试验数据,对不同计算方法得到的结果进行了比较,在此基础上讨论了不同计算方法的适用范围和局限性.分析结果表明:地基反力法经验性较强,其中常数法、Matlock法(m法)等单一参数的弹性地基反力法较为简便,且m法的计算结果与实际情况更为接近,但对于嵌岩桩在缺乏现场试验数据时其参数选取较为困难;p-y曲线法考虑了地基的非线性反应,更适合大变形桩,但也存在高估岩体刚度的情况,缺乏更多验证;弹性连续体法考虑了岩石地基的连续性,但未能考虑到实际工程中的复杂效应.The existing method and theory for determining the horizontal bearing capacity of rock-socketed pile,including subgrade reaction method and elastic continuum method were summarized and analyzed.The results from different methods were compared based on the in-situ test data,and the validity and limitations of the different methods were discussed.The results show that the accuracy of subgrade reaction method depends mainly on experience.The linear elastic subgrade reaction methods of constant method and Matlock method with single parameter are relatively simple,but it is difficult to determine the parameters for rock-socketed pile in the absence of field test data.The p-y curve method is more suitable for the pile with large deformation because it reflects the nonlinear reaction of foundation.However,the p-y curve method proposed by Reese overestimates the stiffness of the rock mass,and the validation of the p-y curves for rock-socketed pile is still inadequate.In the elastic continuum method,the continuity of rock is considered,but it is difficult to include the complex effects in practical engineering.

关 键 词：嵌岩桩 水平承载力 地基反力法 弹性连续体法 P-Y曲线法 

分 类 号：TU473.1[建筑科学—结构工程]