倾斜荷载下裙式吸力基础抗拔承载力模型试验研究  

Model Tests on The Bearing Capacity of Modified Suction Caisson under Inclined Pullout Loading

作　　者：李大勇[1,2,3] 孙传平 王栋林 张雨坤 LI Dayong;SUN Chuanping;WANG Donglin;ZHANG Yukun(Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Qingdao 266590,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590 [2]山东科技大学土木工程与建筑学院,山东青岛266590 [3]福州大学土木工程学院,福建福州350108

出　　处：《防灾减灾工程学报》2023年第4期682-691,共10页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51879044);国家自然科学基金项目(51808325);山东科技大学科研创新团队支持计划项目(2015TDJH104)资助。

摘　　要：开展室内模型试验,研究倾斜荷载作用下裙式吸力基础的承载特性。探讨基础裙结构尺寸、加载角度、加载速度等因素对倾斜荷载作用下裙式吸力基础荷载‑位移关系曲线以及抗拔承载力的影响,研究加载过程中主桶和裙结构内吸力变化规律。试验结果表明:倾斜荷载作用下,裙式吸力基础抗拔承载力随着裙宽和裙高的增大逐渐增大,随着加载速度的增大逐渐增大。另外,随着荷载作用方向与水平方向角度的不断增大,裙式吸力基础抗拔承载力有所降低,主桶和裙内吸力均增大。In this paper,a model test was conducted to investigate the bearing characteristics of the skirt suction foundation under an inclined load.Through changing the skirt width,skirt height,loading angle and loading speed,the change of bearing capacity of the modified suction caisson base under an inclined load was explored,and the negative pressure in the main barrel and the negative pressure in the modified suction caisson were analyzed.The results show that the bearing capacity of the modified suction caisson base under the effect of inclined load increases with the increase of the skirt width,skirt height and loading speed,and the corresponding base displacement value increases when the ultimate bearing capacity is reached.With the increase of the load angle,the negative pressure in the barrel increases although the basic bearing capacity decreases.

关 键 词：倾斜荷载 抗拔承载特性 模型试验 吸力 加载速度 

分 类 号：TU443[建筑科学—岩土工程]