基于FLAC3D对大连某工程桩基承载力数值模拟研究
投稿时间：2019-01-24  修订日期：2019-01-24  点此下载全文
引用本文：张颖,陈晨,王彧佼,等.基于FLAC3D对大连某工程桩基承载力数值模拟研究[J].钻探工程,2019,46(5):65-71,85.
ZHANG Ying,CHEN Chen,WANG Yujiao,et al. FLAC3D based numerical simulation of bearing capacity ofpile foundation in Dalian[J]. Drilling Engineering, 2019,46(5):65-71,85.
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作者单位E-mail
张颖 吉林大学建设工程学院 1070190395@qq.com 
陈晨* 吉林大学建设工程学院 chenchen@jlu.edu.cn 
王彧佼 中国建筑东北设计研究院有限公司  
靳成才 吉林大学建设工程学院  
张晗 吉林大学建设工程学院  
潘栋彬 吉林大学建设工程学院  
基金项目:国家自然科学基金面上项目“高压低温水射流作用下海底天然气水合物储层破岩过程与机理研究”(编号:41672361 );省校共建项目,新能源专项“油页岩原位转化工程共性关键技术研究”(编 号:SXGJSF2017-5 );吉林省科技发展计划重点科技攻关项目(编 号:2016020401SF )
中文摘要:利用FLAC3D软件针对大连某工程桩基的承载力进行数值模拟，对比分析了普通桩和扩底桩的承载力。研究结果表明:利用FLAC3D软件模拟普通桩Q-s变化，在相同荷载下，模拟与实测的Q-s曲线吻合，说明建立的FLAC3D模型比较适用于本工程问题研究。利用建立的FLAC3D模型对在6000 kN荷载、桩身直径相同的条件下的扩底桩和普通桩进行受力分析，桩顶应力一样的条件下，桩端应力减少50%，改善了桩端受力条件。在桩长不变的条件下，研究了缩小桩径的扩底桩的承载力，其用料占普通桩的61.2%，模拟结果表明，缩小直径扩底桩能够达到工程荷载要求，并且降低了成本。建议对原有的设计进行修正并为类似工程提供理论依据。
中文关键词:FLAC 3D软件  单桩荷载值  顶位移量  桩体破坏  普通桩  缩小直径的扩底桩
 
FLAC3D based numerical simulation of bearing capacity ofpile foundation in Dalian
Abstract:The bearing capacity of large diameter piles in Dalian is simulated with FLAC3D software, and the bearing capacity of conventional piles and bell-out piles are compared and analyzed. The results show that the FLAC3D software simulated changes in Q-s curves fit the actual measured ones for conventional piles under the same load, indicating that the established FLAC3D model is suitable for study of those piles. The FLAC3D model is used to analyze stress of bell-out piles and conventional piles under the condition of 6000kN load and the same pile diameter. Under the condition of the same stress at the top of pile, the stress at the end of pile is reduced by 50%, and the stress condition at the end of pile is improved. Under the condition of the same pile length, the bearing capacity of the bell-out pile with reduced diameter is studied. The material used is 61.2% of the conventional pile. The simulation results show that the bell-out pile with reduced diameter can meet the engineering load requirements and reduce the cost. It is suggested that the original design should be revised to provide a theoretical basis for similar projects.
keywords:FLAC3D software  pile foundation  single pile load value  top displacement  pile failure  bell-out pile  pile diameter
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