Article(id=1223202690818228918, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20230120, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1675267200000, receivedDateStr=2023-02-02, revisedDate=1681056000000, revisedDateStr=2023-04-10, acceptedDate=null, acceptedDateStr=null, onlineDate=1769563847498, onlineDateStr=2026-01-28, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769563847498, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769563847498, creator=13701087609, updateTime=1769563847498, updator=13701087609, issue=Issue{id=1223202678788965355, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='12', pageStart='1', pageEnd='228', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769563844630, creator=13701087609, updateTime=1769563913308, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223202966899901286, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223202966899901287, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=168, endPage=172, ext={EN=ArticleExt(id=1223202692730831587, articleId=1223202690818228918, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Quantitative Analysis and Application of NMR T2 Spectrum of Loess Under Dry-wet Cycles Conditions, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

In order to explore the impact of moisture change on the pore structure of reshaped loess, different times of humidification-dehumidification cycle tests were carried out for remodeled loess with different dry densities, and the pore structure inside the soil under different cycles was tested by nuclear magnetic resonance technology. The results show that the NMR T2 pattern of reshaped loess presents a bimodal structure, that is, the sample contains two pore structures; The dry and wet cycles have an impact on the change of the pore structure of the loess, and the pore structure shows different laws under different times of dry and wet cycles. Finally, based on the quantitative parameters extracted from the T2 pattern, the permeability of reshaped loess under different cycles were calculated by SDR permeability model, and the permeability mechanism of loess was explained from the microscopic aspect.

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为探究水分变化对重塑黄土孔隙结构的影响,对不同干密度的重塑黄土进行了不同次数的增湿-减湿循环试验,利用核磁共振技术测试不同循环次数下土体内部的孔隙结构。结果表明,重塑黄土的核磁共振T2图谱呈双峰结构,即试样内部包含两种孔隙结构;干湿循环对黄土孔隙结构的变化有影响,不同干湿循环次数下孔隙结构呈不同的变化规律。最后基于T2图谱中提取的定量参数,利用SDR渗透模型计算不同循环次数下重塑黄土的渗透率,从微观方面解释了渗透机制。

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孙文(1976-),男,博士、副教授,研究方向为水利工程、岩土工程及理论,E-mail:
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麻建宏(1997-),男,硕士研究生,研究方向为水利工程、岩土工程,E-mail:

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麻建宏(1997-),男,硕士研究生,研究方向为水利工程、岩土工程,E-mail:

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干湿循环条件下黄土核磁共振T2图谱定量分析与应用
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麻建宏 , 孙文 , 徐娜 , 幸锦雯 , 马文东 , 孙浩宸
水电能源科学 | 水利水电工程 2023,41(12): 168-172
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水电能源科学 | 水利水电工程 2023, 41(12): 168-172
干湿循环条件下黄土核磁共振T2图谱定量分析与应用
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麻建宏 , 孙文 , 徐娜, 幸锦雯, 马文东, 孙浩宸
作者信息
  • 兰州交通大学土木工程学院,甘肃 兰州 730070
  • 麻建宏(1997-),男,硕士研究生,研究方向为水利工程、岩土工程,E-mail:

通讯作者:

孙文(1976-),男,博士、副教授,研究方向为水利工程、岩土工程及理论,E-mail:
Quantitative Analysis and Application of NMR T2 Spectrum of Loess Under Dry-wet Cycles Conditions
Jian-hong MA , Wen SUN , Na XU, Jin-wen XING, Wen-dong MA, Hao-chen SUN
Affiliations
  • School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
出版时间: 2023-12-25 doi: 10.20040/j.cnki.1000-7709.2023.20230120
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为探究水分变化对重塑黄土孔隙结构的影响,对不同干密度的重塑黄土进行了不同次数的增湿-减湿循环试验,利用核磁共振技术测试不同循环次数下土体内部的孔隙结构。结果表明,重塑黄土的核磁共振T2图谱呈双峰结构,即试样内部包含两种孔隙结构;干湿循环对黄土孔隙结构的变化有影响,不同干湿循环次数下孔隙结构呈不同的变化规律。最后基于T2图谱中提取的定量参数,利用SDR渗透模型计算不同循环次数下重塑黄土的渗透率,从微观方面解释了渗透机制。

干湿循环  /  核磁共振  /  定量参数  /  孔隙结构  /  SDR渗透模型

In order to explore the impact of moisture change on the pore structure of reshaped loess, different times of humidification-dehumidification cycle tests were carried out for remodeled loess with different dry densities, and the pore structure inside the soil under different cycles was tested by nuclear magnetic resonance technology. The results show that the NMR T2 pattern of reshaped loess presents a bimodal structure, that is, the sample contains two pore structures; The dry and wet cycles have an impact on the change of the pore structure of the loess, and the pore structure shows different laws under different times of dry and wet cycles. Finally, based on the quantitative parameters extracted from the T2 pattern, the permeability of reshaped loess under different cycles were calculated by SDR permeability model, and the permeability mechanism of loess was explained from the microscopic aspect.

dry-wet cycle  /  NMR  /  quantitative parameters  /  pore structure  /  SDR permeability model
麻建宏, 孙文, 徐娜, 幸锦雯, 马文东, 孙浩宸. 干湿循环条件下黄土核磁共振T2图谱定量分析与应用. 水电能源科学, 2023 , 41 (12) : 168 -172 . DOI: 10.20040/j.cnki.1000-7709.2023.20230120
Jian-hong MA, Wen SUN, Na XU, Jin-wen XING, Wen-dong MA, Hao-chen SUN. Quantitative Analysis and Application of NMR T2 Spectrum of Loess Under Dry-wet Cycles Conditions[J]. Water Resources and Power, 2023 , 41 (12) : 168 -172 . DOI: 10.20040/j.cnki.1000-7709.2023.20230120
  • 中央引导地方科技发展资金项目(22ZY1QA005)
2023年第41卷第12期
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doi: 10.20040/j.cnki.1000-7709.2023.20230120
  • 接收时间:2023-02-02
  • 首发时间:2026-01-28
  • 出版时间:2023-12-25
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  • 收稿日期:2023-02-02
  • 修回日期:2023-04-10
基金
中央引导地方科技发展资金项目(22ZY1QA005)
作者信息
    兰州交通大学土木工程学院,甘肃 兰州 730070

通讯作者:

孙文(1976-),男,博士、副教授,研究方向为水利工程、岩土工程及理论,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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