[1]栾阳,杨阳,戴国亮,等.非接触桩箱复合基础竖向承载特性分析[J].东南大学学报(自然科学版),2020,50(6):999-1005.[doi:10.3969/j.issn.1001-0505.2020.06.002]
　Luan Yang,Yang Yang,et al.Analysis on vertical bearing characteristics of unconnected caisson-pile composite foundation[J].Journal of Southeast University (Natural Science Edition),2020,50(6):999-1005.[doi:10.3969/j.issn.1001-0505.2020.06.002]
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非接触桩箱复合基础竖向承载特性分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第6期
页码:
999-1005
栏目:
土木工程
出版日期:
2020-11-20

文章信息/Info

Title:
Analysis on vertical bearing characteristics of unconnected caisson-pile composite foundation
作者:
栾阳1; 2; 杨阳1; 2; 戴国亮1; 2; 龚维明1;  2; 贾其军3
1东南大学土木工程学院, 南京 210096; 2东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 3中国路桥工程有限责任公司, 北京 100011
Author(s):
Luan Yang1;  2;  Yang Yang1; 2;  Dai Guoliang1; 2;  Gong Weiming1; 2;  Jia Qijun3
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China
3China Road and Bridge Corporation, Beijing 100011, China
关键词:
非接触桩箱复合基础;  竖向承载力;  沉降;  离散-有限差分耦合
Keywords:
unconnected caisson-pile composite foundation;  vertical bearing capacity;  settlement;  coupling of discrete element and finite element method
分类号:
TU473
DOI:
10.3969/j.issn.1001-0505.2020.06.002
摘要:
为研究非接触桩箱复合基础的竖向承载性能,基于室内模型试验,分析了非接触桩箱复合基础的承载力特性及沉降规律.采用离散-有限差分多尺度耦合分析方法建模,将模型计算结果与室内试验结果进行对比,从宏、细观分析非接触桩箱复合基础的力学行为特性.结果表明,非接触桩箱复合基础荷载位移曲线为缓降形,下部地基土变形为中间大、两边小.垫层越厚,沉箱沉降越大,但垫层对桩、土变形协调能力越好.沉箱下部垫层颗粒大都向下运动,靠近沉箱边缘的颗粒水平运动明显,垫层颗粒出现明显水平运动的起始点与地基表层土出现沉降的拐点相一致.
Abstract:
To study the vertical bearing behaviors of unconnected caisson-pile foundation, the bearing capacity and the settlement feature were analyzed based on a series of indoor model tests. The simulation model was established by a multi-scale method with coupling of discrete element and finite element method. Compared the simulation results with the indoor model test results, the mechanical behavior features of the unconnected caisson-pile foundation were analyzed from macro and micro view. The results show that the loading-displacement curve of the unconnected caisson-pile foundation changes slowly. The vertical displacement of soil on ground surface is large in the middle and small on both sides. The thicker the cushion is, the larger the caisson settlement is, but the compatible deformation capability of the pile and soil is better. The cushion particles under the caisson mainly move downward, and those nearing the caisson edge obviously move horizontally. The position where particle horizontal movement starts obviously is consistent with that of the inflection point of the ground surface soil settlement.

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备注/Memo

备注/Memo:
收稿日期: 2020-06-30.
作者简介: 栾阳(1993—),女,博士生;戴国亮(联系人),男,博士,教授,博士生导师, daigl@seu.edu.cn.
基金项目: 国家重点研发计划重点专项资助项目(2017YFC0703408)、国家自然科学基金资助项目(51678145,51878160)、中国交建重点研发资助项目(2016-zjjt-24).
引用本文: 栾阳,杨阳,戴国亮,等.非接触桩箱复合基础竖向承载特性分析[J].东南大学学报(自然科学版),2020,50(6):999-1005. DOI:10.3969/j.issn.1001-0505.2020.06.002.
更新日期/Last Update: 2020-11-20