Article(id=1223201269951611175, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223201250133524577, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221808, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1661875200000, receivedDateStr=2022-08-31, revisedDate=1664294400000, revisedDateStr=2022-09-28, acceptedDate=null, acceptedDateStr=null, onlineDate=1769563508736, onlineDateStr=2026-01-28, pubDate=1690214400000, pubDateStr=2023-07-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769563508736, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769563508736, creator=13701087609, updateTime=1769563508736, updator=13701087609, issue=Issue{id=1223201250133524577, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='7', 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=1769563504012, creator=13701087609, updateTime=1769563583713, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223201584469885927, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223201250133524577, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223201584469885928, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223201250133524577, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=171, endPage=174, ext={EN=ArticleExt(id=1223201270358458693, articleId=1223201269951611175, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Triaxial Numerical Simulation and Macro-Micro Deformation Analysis of Soil-rock Mixture, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

Since the mechanical properties of dam materials can directly affect the settlement deformation and structural stability of core wall DAMS, it is necessary to explore the mechanical properties of soil-rock mixture and the internal deformation and failure mechanism by means of macro and micro in order. Taking the Rumei Hydropower Station in Tibet in Lancang River as research background, particle flow code (PFC) method based on discrete element was used to carry out large-scale triaxial numerical simulation test. The results show that with irregular enhancement in the form of block stone, the stress peak nodes was in advance, peak strength increased obviously with significant softening characteristics, shear shrinkage was not obvious, and the dilatancy is prominent; The shear zone evolved from a single “工” shape to a complex “工” shape. The thickness increases from 45 mm to 105 mm, and the final swelling failure area increases exponentially to 35 000 mm2. The extreme value and the number of force chain strength increased. Increasing the stone content was the key to improve the peak strength of the sample. When the rock content was low, the shear shrinkage characteristic was prominent, and the dilatancy characteristic was not obvious. With the increase of the stone content, the “gear” effect of the block stone was enhanced, and the shear zone failure mode was transitioned from smooth reverse “S” shape to multiple irregular shear zones, with the thickness increasing from 47.5 mm to 105 mm, the swelling failure area evolving from 12 800 to 35 000 mm2, and the number of strong chains increased. The extreme strength of the force chain was increased from 10.49 kN to 164.30 kN. In conclusion, it is suggested to select blocks with high irregularity and increase the stone content to enhance the structural strength stability. The research can provide reference for the stability evaluation of the project in the later stage and the work of the proposed dam.

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筑坝料的力学特性能够直接影响心墙坝的沉降变形及结构稳定性,为究其根本原因,采用宏细观相结合的手段探究土石混合体的力学性能及内部变形破坏机制。以西藏澜沧江如美水电站工程为例,基于离散元颗粒流法开展大型三轴数值模拟试验,结果表明,随块石形态的不规则度提高,应力峰值出现节点提前、峰值强度明显增大并伴有显著软化特征,剪缩性不明显,剪胀性突出;剪切带由单一“工”字型向复杂“工”字型破坏形态演化,厚度由45 mm增至105 mm,最终鼓胀破坏面积成倍递增至35 000 mm2;力链强度极值增大且数目增多。增大含石量也是提高试样峰值强度的关键;含石量较低时试样剪缩特性突出,剪胀特性不明显;随含石量增大,块石“齿轮”效应增强,剪切带破坏形态由光滑反“S”型向多条不规则剪切带过渡,厚度由47.5 mm增为105 mm,鼓胀破坏区面积从12 800 mm2演化至35 000 mm2,强力链数目增长,力链强度极值由10.49 kN提高至164.30 kN。可选择不规则度高的块石并提高含石量以增强结构强度稳定性,研究结果可为工程后期稳定性评价及拟建大坝工作提供参考。

, correspAuthors=null, authorNote=null, correspAuthorsNote=
张凌凯(1987-),男,博士、副教授,研究方向为环境岩土工程,E-mail:
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张润涵(2000-),女,硕士研究生,研究方向为岩土材料多尺度数值模拟,E-mail:

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张润涵(2000-),女,硕士研究生,研究方向为岩土材料多尺度数值模拟,E-mail:

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张润涵(2000-),女,硕士研究生,研究方向为岩土材料多尺度数值模拟,E-mail:

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土石混合体的三轴数值模拟及宏细观变形分析
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张润涵 1, 2 , 张凌凯 1, 2 , 崔熙灿 1, 2
水电能源科学 | 水利水电工程 2023,41(7): 171-174
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水电能源科学 | 水利水电工程 2023, 41(7): 171-174
土石混合体的三轴数值模拟及宏细观变形分析
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张润涵1, 2 , 张凌凯1, 2 , 崔熙灿1, 2
作者信息
  • 1.新疆农业大学水利与土木工程学院,新疆 乌鲁木齐 830052
  • 2.新疆水利工程安全与水灾害防治重点实验室,新疆 乌鲁木齐 830052
  • 张润涵(2000-),女,硕士研究生,研究方向为岩土材料多尺度数值模拟,E-mail:

通讯作者:

张凌凯(1987-),男,博士、副教授,研究方向为环境岩土工程,E-mail:
Triaxial Numerical Simulation and Macro-Micro Deformation Analysis of Soil-rock Mixture
Run-han ZHANG1, 2 , Ling-kai ZHANG1, 2 , Xi-can CUI1, 2
Affiliations
  • 1.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
  • 2.Xinjiang Key Laboratory of Hydraulic Engineering Safety and Water Disaster Prevention, Urumqi 830052, China
出版时间: 2023-07-25 doi: 10.20040/j.cnki.1000-7709.2023.20221808
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筑坝料的力学特性能够直接影响心墙坝的沉降变形及结构稳定性,为究其根本原因,采用宏细观相结合的手段探究土石混合体的力学性能及内部变形破坏机制。以西藏澜沧江如美水电站工程为例,基于离散元颗粒流法开展大型三轴数值模拟试验,结果表明,随块石形态的不规则度提高,应力峰值出现节点提前、峰值强度明显增大并伴有显著软化特征,剪缩性不明显,剪胀性突出;剪切带由单一“工”字型向复杂“工”字型破坏形态演化,厚度由45 mm增至105 mm,最终鼓胀破坏面积成倍递增至35 000 mm2;力链强度极值增大且数目增多。增大含石量也是提高试样峰值强度的关键;含石量较低时试样剪缩特性突出,剪胀特性不明显;随含石量增大,块石“齿轮”效应增强,剪切带破坏形态由光滑反“S”型向多条不规则剪切带过渡,厚度由47.5 mm增为105 mm,鼓胀破坏区面积从12 800 mm2演化至35 000 mm2,强力链数目增长,力链强度极值由10.49 kN提高至164.30 kN。可选择不规则度高的块石并提高含石量以增强结构强度稳定性,研究结果可为工程后期稳定性评价及拟建大坝工作提供参考。

三轴试验  /  土石混合体  /  离散元  /  宏观变形  /  细观结构

Since the mechanical properties of dam materials can directly affect the settlement deformation and structural stability of core wall DAMS, it is necessary to explore the mechanical properties of soil-rock mixture and the internal deformation and failure mechanism by means of macro and micro in order. Taking the Rumei Hydropower Station in Tibet in Lancang River as research background, particle flow code (PFC) method based on discrete element was used to carry out large-scale triaxial numerical simulation test. The results show that with irregular enhancement in the form of block stone, the stress peak nodes was in advance, peak strength increased obviously with significant softening characteristics, shear shrinkage was not obvious, and the dilatancy is prominent; The shear zone evolved from a single “工” shape to a complex “工” shape. The thickness increases from 45 mm to 105 mm, and the final swelling failure area increases exponentially to 35 000 mm2. The extreme value and the number of force chain strength increased. Increasing the stone content was the key to improve the peak strength of the sample. When the rock content was low, the shear shrinkage characteristic was prominent, and the dilatancy characteristic was not obvious. With the increase of the stone content, the “gear” effect of the block stone was enhanced, and the shear zone failure mode was transitioned from smooth reverse “S” shape to multiple irregular shear zones, with the thickness increasing from 47.5 mm to 105 mm, the swelling failure area evolving from 12 800 to 35 000 mm2, and the number of strong chains increased. The extreme strength of the force chain was increased from 10.49 kN to 164.30 kN. In conclusion, it is suggested to select blocks with high irregularity and increase the stone content to enhance the structural strength stability. The research can provide reference for the stability evaluation of the project in the later stage and the work of the proposed dam.

triaxial tests  /  soil rock mixture  /  discrete element method  /  macroscopical deformation  /  microstructure
张润涵, 张凌凯, 崔熙灿. 土石混合体的三轴数值模拟及宏细观变形分析. 水电能源科学, 2023 , 41 (7) : 171 -174 . DOI: 10.20040/j.cnki.1000-7709.2023.20221808
Run-han ZHANG, Ling-kai ZHANG, Xi-can CUI. Triaxial Numerical Simulation and Macro-Micro Deformation Analysis of Soil-rock Mixture[J]. Water Resources and Power, 2023 , 41 (7) : 171 -174 . DOI: 10.20040/j.cnki.1000-7709.2023.20221808
  • 国家自然科学基金青年科学基金项目(52109136)
  • 水文水资源与水利工程科学国家重点实验室“一带一路”水与可持续发展科技基金项目(2020492211)
  • 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放基金项目(IWHR-SKL-KF201908)
2023年第41卷第7期
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doi: 10.20040/j.cnki.1000-7709.2023.20221808
  • 接收时间:2022-08-31
  • 首发时间:2026-01-28
  • 出版时间:2023-07-25
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出版历史
  • 收稿日期:2022-08-31
  • 修回日期:2022-09-28
基金
国家自然科学基金青年科学基金项目(52109136)
水文水资源与水利工程科学国家重点实验室“一带一路”水与可持续发展科技基金项目(2020492211)
中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放基金项目(IWHR-SKL-KF201908)
作者信息
    1.新疆农业大学水利与土木工程学院,新疆 乌鲁木齐 830052
    2.新疆水利工程安全与水灾害防治重点实验室,新疆 乌鲁木齐 830052

通讯作者:

张凌凯(1987-),男,博士、副教授,研究方向为环境岩土工程,E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
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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