砂土中吸力基础抗拔承载力的影响因素分析  

Influence Factors of Uplift Bearing Capacity of Suction Caisson in Sand

作　　者：李大勇 白云 马士力 卢高 LI Dayong, BAI Yun, MA Shili, LU Gao(College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266590, Chin)

机构地区：[1]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2018年第4期58-63,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51379118);山东科技大学科研创新团队资助项目(2015TDJH104)

摘　　要：通过饱和细海砂中吸力基础的上拔模型试验,探究了上拔速度、基础长径比对基础内部负压以及基础抗拔承载力的影响规律。研究结果表明:随着上拔速度的增大,基础内部负压及抗拔承载力均增大,随着拔出高度的增加,桶内负压先增加、后减小、最终趋于稳定。极限状态下,吸力基础的竖向位移随加载速率以及基础长径比的增加呈增大趋势。A series of model tests of suction caisson in saturated marine fine sand was carried out to study the influences of uplift rate and length-diameter ratio of suction caisson on the negative pressure inside suction caisson and the uplift bearing capacity.Results show that both the negative pressure and uplift bearing capacity increase with the increase of the uplift rate.With the increase of the pull-out height,the negative pressure increases initially and then decreases gradually to a constant value.In the ultimate state,the corresponding vertical displacement of the suction caisson increases with the increase of the loading rate and the length-diameter ratio.

关 键 词：抗拔承载力 负压 上拔速度 吸力基础 模型试验 

分 类 号：TU47[建筑科学—结构工程]