砂土中吸力式单桩极限抗斜拉承载力计算  

Calculation for ultimate inclined pull-out capacity of single suction pile in sand

作　　者：张苇[1] 杜湧[1] 高建财 张炎飞 郭昭胜[1] 白晓红[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024

出　　处：《广西大学学报（自然科学版）》2018年第1期232-239,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金青年科学基金资助项目(51408395);山西省"百人计划"项目(800101-02030017);131人才专项经费(900198-02010018);山西省研究生教育创新项目(2017SY024)

摘　　要：为研究饱和砂土中吸力式单桩的极限抗斜拉承载力,对3种不同长径比和3种荷载作用角度下的吸力式单桩进行了室内大比尺模型试验,分析得到了不同参数下的桩基础的极限抗斜拉承载力。通过极限平衡法对吸力式单桩的极限竖向抗拔承载力和极限水平向承载力进行了分析研究,并基于破坏包络线的概念,对吸力式单桩极限抗斜拉承载力的试验结果进行回归分析和拟合,得到了竖向承载力和水平承载力之间的归一化关系及经验公式,进而推导出吸力式单桩基础的极限抗斜拉承载力。To further study the ultimate inclined pull-out capacity of single suction pile in saturated sand,a series of large-scale model tests were carried out for three different aspect ratios and loading angles. Through analysis of the test results,the ultimate inclined pull-out capacity of pile foundation was obtained. The vertical uplift bearing capacity and horizontal bearing capacity of suction pile in sand were analyzed through the limit equilibrium method. Based on the concept of failure envelope,a regression analysis and fitting of the model test results were conducted. Empirical formulation and normalized relation between the vertical bearing capacity and horizontal bearing capacity were obtained to deduce the ultimate inclined pull-out capacity of suction pile foundation.

关 键 词：吸力式单桩 极限承载力 斜拉荷载 破坏包络线 水平承载力 

分 类 号：TU473.1[建筑科学—结构工程]