Article(id=1223204289422672776, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223204286050452333, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221398, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1657382400000, receivedDateStr=2022-07-10, revisedDate=1661011200000, revisedDateStr=2022-08-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1769564228634, onlineDateStr=2026-01-28, pubDate=1684944000000, pubDateStr=2023-05-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769564228634, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769564228634, creator=13701087609, updateTime=1769564228634, updator=13701087609, issue=Issue{id=1223204286050452333, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='5', pageStart='1', pageEnd='220', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769564227831, creator=13701087609, updateTime=1769567742010, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223219026013323264, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223204286050452333, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223219026013323265, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223204286050452333, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=130, endPage=134, ext={EN=ArticleExt(id=1223204289674331027, articleId=1223204289422672776, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=DEM Simulation Study of Strength Parameters of Stone Column Composite Foundations Under High Stress, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

In stone column composite foundations, the Priebe parameter composite method is commonly used to calculate the equivalent shear strength. Most of the existing studies are based on low stresses in conventional embankments, but few studies have been carried out on the applicability of this method under high stresses. This study focuses on the foundation treatment project for a clay core rock fill dam in Rwanda. The stress-strain behavior, micro-failure mechanism and equivalent shear strength of composite specimens with different area replacement ratio were investigated by simulating large-scale triaxle tests with discrete element numerical methods and compared with the widely used parametric composite method. The results show that the stress-strain characteristics of stone column composite foundations at high stresses differ from those at low stresses, and show a strain hardening trend. Composite specimens show a significant non-linear trend in strength at high stresses. The shear strength parameters calculated by the parameter composite method overestimate the strength of composite foundations, and it is recommended that they be discounted in engineering applications.

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碎石桩复合地基中,常用Priebe参数叠加法计算复合地基等效抗剪强度。现有研究多基于常规路堤低应力下展开,少见在高应力作用下该方法适用性研究。对此,依托卢旺达某粘土心墙堆石坝坝基处理工程,利用离散元数值方法(DEM),模拟碎石桩复合地基单桩室内试验,研究了不同面积置换率下碎石桩复合试样的应力应变特性、细观破坏机理及等效抗剪强度,并与广泛使用的参数叠加法进行了对比。研究结果表明,高应力时碎石桩复合地基应力应变特性区别于低应力状态,呈应变硬化趋势;复合试样强度在高应力状态下呈现明显非线性趋势;参数叠加法计算所得的抗剪强度参数对复合地基强度有所高估,建议在工程运用中进行折减。

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周建(1970-),女,博士、教授、博导,研究方向为软粘土力学、地基处理、土工数值分析等,E-mail:
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侯靖(1972-),男,教授级高级工程师,研究方向为水电水利和岩土工程项目管理和设计,E-mail:

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侯靖(1972-),男,教授级高级工程师,研究方向为水电水利和岩土工程项目管理和设计,E-mail:

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侯靖(1972-),男,教授级高级工程师,研究方向为水电水利和岩土工程项目管理和设计,E-mail:

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高应力下碎石桩复合地基强度参数DEM模拟研究
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侯靖 1 , 蒋熠诚 2, 3 , 韩华超 1 , 周建 2, 3
水电能源科学 | 水利水电工程 2023,41(5): 130-134
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水电能源科学 | 水利水电工程 2023, 41(5): 130-134
高应力下碎石桩复合地基强度参数DEM模拟研究
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侯靖1 , 蒋熠诚2, 3, 韩华超1, 周建2, 3
作者信息
  • 1.中国电建集团华东勘测设计院有限公司,浙江 杭州 311122
  • 2.浙江大学滨海和城市岩土工程研究中心,浙江 杭州 310012
  • 3.浙江大学浙江省城市地下空间开发工程技术研究中心,浙江 杭州 310058
  • 侯靖(1972-),男,教授级高级工程师,研究方向为水电水利和岩土工程项目管理和设计,E-mail:

通讯作者:

周建(1970-),女,博士、教授、博导,研究方向为软粘土力学、地基处理、土工数值分析等,E-mail:
DEM Simulation Study of Strength Parameters of Stone Column Composite Foundations Under High Stress
Jing HOU1 , Yi-cheng JIANG2, 3, Hua-chao HAN1, Jian ZHOU2, 3
Affiliations
  • 1.PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China
  • 2.Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310012, China
  • 3.Zhejiang Urban Underground Space Development Engineering Technology Research Center, Zhejiang University, Hangzhou 310058, China
出版时间: 2023-05-25 doi: 10.20040/j.cnki.1000-7709.2023.20221398
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碎石桩复合地基中,常用Priebe参数叠加法计算复合地基等效抗剪强度。现有研究多基于常规路堤低应力下展开,少见在高应力作用下该方法适用性研究。对此,依托卢旺达某粘土心墙堆石坝坝基处理工程,利用离散元数值方法(DEM),模拟碎石桩复合地基单桩室内试验,研究了不同面积置换率下碎石桩复合试样的应力应变特性、细观破坏机理及等效抗剪强度,并与广泛使用的参数叠加法进行了对比。研究结果表明,高应力时碎石桩复合地基应力应变特性区别于低应力状态,呈应变硬化趋势;复合试样强度在高应力状态下呈现明显非线性趋势;参数叠加法计算所得的抗剪强度参数对复合地基强度有所高估,建议在工程运用中进行折减。

碎石桩  /  地基处理  /  高应力  /  参数叠加法  /  离散元

In stone column composite foundations, the Priebe parameter composite method is commonly used to calculate the equivalent shear strength. Most of the existing studies are based on low stresses in conventional embankments, but few studies have been carried out on the applicability of this method under high stresses. This study focuses on the foundation treatment project for a clay core rock fill dam in Rwanda. The stress-strain behavior, micro-failure mechanism and equivalent shear strength of composite specimens with different area replacement ratio were investigated by simulating large-scale triaxle tests with discrete element numerical methods and compared with the widely used parametric composite method. The results show that the stress-strain characteristics of stone column composite foundations at high stresses differ from those at low stresses, and show a strain hardening trend. Composite specimens show a significant non-linear trend in strength at high stresses. The shear strength parameters calculated by the parameter composite method overestimate the strength of composite foundations, and it is recommended that they be discounted in engineering applications.

stone column  /  ground treatment  /  high stress condition  /  parametric composite method  /  discrete element model
侯靖, 蒋熠诚, 韩华超, 周建. 高应力下碎石桩复合地基强度参数DEM模拟研究. 水电能源科学, 2023 , 41 (5) : 130 -134 . DOI: 10.20040/j.cnki.1000-7709.2023.20221398
Jing HOU, Yi-cheng JIANG, Hua-chao HAN, Jian ZHOU. DEM Simulation Study of Strength Parameters of Stone Column Composite Foundations Under High Stress[J]. Water Resources and Power, 2023 , 41 (5) : 130 -134 . DOI: 10.20040/j.cnki.1000-7709.2023.20221398
2023年第41卷第5期
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doi: 10.20040/j.cnki.1000-7709.2023.20221398
  • 接收时间:2022-07-10
  • 首发时间:2026-01-28
  • 出版时间:2023-05-25
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  • 收稿日期:2022-07-10
  • 修回日期:2022-08-21
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作者信息
    1.中国电建集团华东勘测设计院有限公司,浙江 杭州 311122
    2.浙江大学滨海和城市岩土工程研究中心,浙江 杭州 310012
    3.浙江大学浙江省城市地下空间开发工程技术研究中心,浙江 杭州 310058

通讯作者:

周建(1970-),女,博士、教授、博导,研究方向为软粘土力学、地基处理、土工数值分析等,E-mail:
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2种不同金属材料的力学参数

Family
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Number of
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种数
Number of
species
占总种数比例
Percentage of
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Genus
种数
Number of
species
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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