Influence analysis of sand subsidence and densification caused by lateral cyclic loading on bearing capacity of rigid piles

被引：0

作者：

Wang Y. ^{[1
,2
]}

Zhu M. ^{[3
]}

Gong W. ^{[1
,2
]}

Dai G. ^{[1
,2
]}

Wang B. ^{[1
,2
]}

机构：

[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing

[2] School of Civil Engineering, Southeast University, Nanjing

[3] School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang

来源：

Gong, Weiming (wmgong@seu.edu.cn); Gong, Weiming (wmgong@seu.edu.cn) | 1600年 / Southeast University卷 / 51期

关键词：

Bearing capacity; Cycle; Densification; Monopile; Settlement;

D O I：

10.3969/j.issn.1001-0505.2021.06.011

中图分类号：

学科分类号：

摘要：

To study the evolution law of the bearing capacity of rigid piles in sand under cyclic loading, an evaluation method for the monopile bearing capacity after cycling was proposed. Firstly, based on the mass conservation principle of subsidence pits and densified regions, the change of the soil parameters caused by subsidence was quantified. Then, according to the sand lateral soil resistance-displacement model in API(American Petroleum Institute), the monopile bearing capacities before and after cycling were calculated. Finally, an evaluation model for the monopile bearing capacity after cycling was proposed, and the multi-factors such as the subsidence size, the initial relative density and the densified region mode were compared and analyzed. The results show that the monopile bearing capacity increases with the development of the subsidence pit. As for loose sand, medium dense sand and dense sand, the monopile bearing capacity after cycling can be increased by 3.0, 1.5 and 1.2 times, respectively, revealing that the improvement ratio of the monopile bearing capacity decreases with the increase of the relative density. As for two soil deformation modes, the single-cone mode is more in line with the real densified region morphology than the double-cone mode. © 2021, Editorial Department of Journal of Southeast University. All right reserved.

引用

页码：996 / 1001

页数：5

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