Article(id=1307086318417244611, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307086317918122434, articleNumber=null, orderNo=null, doi=10.12401/j.nwg.2025138, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1760284800000, receivedDateStr=2025-10-13, revisedDate=1763308800000, revisedDateStr=2025-11-17, acceptedDate=1763568000000, acceptedDateStr=2025-11-20, onlineDate=1789563262800, onlineDateStr=2026-09-16, pubDate=1776614400000, pubDateStr=2026-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789563262800, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789563262800, creator=13701087609, updateTime=1789563262800, updator=13701087609, issue=Issue{id=1307086317918122434, tenantId=1146029695717560320, journalId=1306274195778404443, year='2026', volume='59', issue='2', pageStart='1', pageEnd='328', issueExtLink='null', onlineDate='null', pubDate='1776614400000', pubDateStr='2026-04-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789563262680, creator='13701087609', updateTime=1789616239746, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307308519917638393, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307086317918122434, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307308519917638394, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307086317918122434, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=20, endPage=31, ext={EN=ArticleExt(id=1307086318568239556, articleId=1307086318417244611, tenantId=1146029695717560320, journalId=1306274195778404443, language=EN, title=Physical–Mechanical Properties and Microstructural Evolution Mechanisms of Typical Loess in the Yan’an Area, columnId=null, journalTitle=Northwestern Geology, columnName=null, runingTitle=null, highlight=null, articleAbstract=
To elucidate the mechanical and seepage properties of typical Yan'an loess at different burial depths and its microstructural evolution patterns, this study systematically investigates four in situ loess layers (L1–L4) from a representative profile in Fuxian County, Yan'an. The objective is to clarify the synergistic mechanism of “structural densification–strength enhancement–permeability reduction,” providing scientific basis for regional loess stratum stability assessment and impermeability reinforcement design. Systematic investigations were conducted on the four loess layers using direct shear tests, permeability tests, and scanning electron microscopy (SEM) analysis. Pore parameters were quantitatively extracted using Avizo software. Data coupling analysis was performed via Pearson correlation analysis and principal component analysis (PCA). Results indicate: ① Shear strength exhibits a layered pattern with burial depth, showing significantly increased cohesion and a slight decrease in internal friction angle. ② The permeability coefficient decreases significantly with depth, exhibiting a “permeable upper layer, dense lower layer” characteristic, plummeting from 17.79×10−5 cm/s in Layer L1 to 7.55×10−5 cm/s in Layer L4. ③ At the microstructural level, particle contact patterns change from point contact and weak cementation in shallow layers to surface contact and strong cementation in deeper layers. Pores evolved from large pores (>35 μm) to medium-small pores (<30 μm), with shapes tending toward roundness. The orientation shifted from vertical dominance to uniform distribution. ④ Pearson analysis indicates a significant positive correlation between dry density and cohesion, while showing significant negative correlations with total pore area and permeability coefficient. PCA analysis reveals PC1 (contribution rate 70.8%) as the primary factor governing “structural densification-strength enhancement,” clearly distinguishing sample distributions between L1 (loose, high permeability) and L4 (dense, low permeability) layers. Conclusions indicate that the evolution of physical and mechanical properties in Yan'an loess is jointly governed by compaction and microstructural remodeling. With increasing burial depth, loess undergoes a “compaction-remodeling-densification” process: particles become more tightly packed, contact modes shift to surface contact, and large pores are compressed and destroyed, replaced by medium and small pores. Macro-scale manifestations include increased cohesion and significantly reduced permeability. Dry density, cohesion, and pore characteristics collectively govern the overall evolutionary trend of loess from loose and highly permeable to dense and low-permeability.
, authors=Yong ZHANG
1, Wanli XIE
2, 3, *, Chengliang JI
1, Xuanyu GAO
2, 3, Kangze YUAN
2, 3, Renjie LI
1, Zhiyi WU
2, 3, Pengxin QU
2, 3, Chenfei QU
2, 3, Fazhi ZHANG
1, authorsList=Yong ZHANG, Wanli XIE, Chengliang JI, Xuanyu GAO, Kangze YUAN, Renjie LI, Zhiyi WU, Pengxin QU, Chenfei QU, Fazhi ZHANG, authorCompany=null, correspAuthors=Wanli XIE, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Northwestern Geology. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1307086322791903722, articleId=1307086318417244611, tenantId=1146029695717560320, journalId=1306274195778404443, language=CN, title=延安地区典型黄土的物理力学特性及微观结构演化机制, columnId=1307086318673097157, journalTitle=西北地质, columnName=西北地区环境岩土工程问题研究, runingTitle=null, highlight=null, articleAbstract=
为揭示延安典型黄土在不同埋深条件下的力学与渗流特性及其微观结构演化规律,本研究以延安富县典型剖面4层原状黄土(L1~L4 )为对象,旨在系统阐明其“结构致密化−强度增强−渗透性衰减”的协同机制,为区域黄土地层稳定性评价与防渗加固设计提供科学依据。采用直剪试验、渗透试验和扫描电镜分析等手段,对4层黄土样品进行了系统研究,并结合 Avizo 软件定量提取孔隙参数;采用 Pearson 相关分析和主成分分析(PCA)进行数据耦合分析。结果表明:①抗剪强度随埋深呈分层特征,粘聚力显著升高,内摩擦角略有减小;②渗透系数随深度增加显著降低,呈“上部通透、下部致密”特征,由 L1 层的 17.79×10−5 cm/s 剧降至 L4 层的 7.55×10−5 cm/s;③微观结构上,颗粒接触形式由浅层的点接触、弱胶结向深层的面接触、强胶结转变,孔隙由大孔(>35 μm)向中小孔(<30 μm)演化,形态趋于圆整,排列方向由垂向优势转为均匀分布;④Pearson 分析表明干密度与粘聚力呈显著正相关,而与总孔隙面积、渗透系数呈显著负相关;PCA 分析揭示 PC1(贡献率 70.8%)为“结构致密化−强度增强”主控因子,清晰区分了 L1(疏松、高渗)与 L4(致密、低渗)的样品分布。研究认为,延安黄土的物理力学特性演化受压实作用与微结构重构的共同控制,随埋深增加,黄土经历“压实−重构−致密化”过程,颗粒趋于紧密、接触方式转为面接触、大孔隙被压缩破坏转为中小孔隙,宏观上表现为粘聚力升高、渗透性显著降低。干密度、粘聚力与孔隙特征共同主导了黄土由松散、高渗向致密、低渗的整体演化趋势。
, authors=张勇
1, 谢婉丽
2, 3, *, 纪成亮
1, 高炫宇
2, 3, 苑康泽
2, 3, 李仁杰
1, 吴至怡
2, 3, 屈鹏鑫
2, 3, 曲晨飞
2, 3, 张法智
1, authorsList=张勇, 谢婉丽, 纪成亮, 高炫宇, 苑康泽, 李仁杰, 吴至怡, 屈鹏鑫, 曲晨飞, 张法智, authorCompany=null, correspAuthors=谢婉丽, authorNote=
, correspAuthorsNote=
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1, address=
1Shandong Electric Power Engineering Consulting Institute Limited Survey Division, Jinan 250013, Shandong, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307086323634958840, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086323492352501, language=CN, stringName=张勇, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1山东电力工程咨询院有限公司勘测事业部,山东 济南 250013, bio={"content":"
张勇(1987−),男,高级工程师,主要从事岩土力学及岩土工程勘察相关研究。E−mail:zhangyongyes@126.com
"}, bioImg=null, bioContent=
张勇(1987−),男,高级工程师,主要从事岩土力学及岩土工程勘察相关研究。E−mail:zhangyongyes@126.com
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1Shandong Electric Power Engineering Consulting Institute Limited Survey Division, Jinan 250013, Shandong, China), AuthorCompanyExt(id=1307086323106476525, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323089699307, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1山东电力工程咨询院有限公司勘测事业部,山东 济南 250013)])]), Author(id=1307086323718844922, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=xiewanli@nwu.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1307086323806925309, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086323718844922, language=EN, stringName=Wanli XIE, firstName=Wanli, middleName=null, lastName=XIE, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, *, address=
2State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, Shaanxi, China
3Xi'an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment, Xi'an 710069, Shaanxi, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307086323899199998, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086323718844922, language=CN, stringName=谢婉丽, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, *, address=
2西北大学地质学系,大陆动力学国家重点实验室, 陕西西安 710069
3西安市黄土动力灾害防控与地质环境修复重点实验室,陕西 西安 710069, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307086323186168302, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, xref=2, ext=[AuthorCompanyExt(id=1307086323198751215, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323186168302, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, Shaanxi, China), AuthorCompanyExt(id=1307086323215528432, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323186168302, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2西北大学地质学系,大陆动力学国家重点实验室, 陕西西安 710069)]), AuthorCompany(id=1307086323303608817, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, xref=3, ext=[AuthorCompanyExt(id=1307086323316191730, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323303608817, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3Xi'an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment, Xi'an 710069, Shaanxi, China), AuthorCompanyExt(id=1307086323345551859, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323303608817, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3西安市黄土动力灾害防控与地质环境修复重点实验室,陕西 西安 710069)])]), Author(id=1307086323978891776, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307086324050194946, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086323978891776, language=EN, stringName=Chengliang JI, firstName=Chengliang, middleName=null, lastName=JI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1Shandong Electric Power Engineering Consulting Institute Limited Survey Division, Jinan 250013, Shandong, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307086324138275331, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086323978891776, language=CN, stringName=纪成亮, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1山东电力工程咨询院有限公司勘测事业部,山东 济南 250013, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307086323089699307, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, xref=1, ext=[AuthorCompanyExt(id=1307086323098087916, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323089699307, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1Shandong Electric Power Engineering Consulting Institute Limited Survey Division, Jinan 250013, Shandong, China), AuthorCompanyExt(id=1307086323106476525, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323089699307, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1山东电力工程咨询院有限公司勘测事业部,山东 济南 250013)])]), Author(id=1307086324213772805, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307086324394127880, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086324213772805, language=EN, stringName=Xuanyu GAO, firstName=Xuanyu, middleName=null, lastName=GAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, Shaanxi, China
3Xi'an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment, Xi'an 710069, Shaanxi, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307086324465431049, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086324213772805, language=CN, stringName=高炫宇, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2西北大学地质学系,大陆动力学国家重点实验室, 陕西西安 710069
3西安市黄土动力灾害防控与地质环境修复重点实验室,陕西 西安 710069, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307086323186168302, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, xref=2, ext=[AuthorCompanyExt(id=1307086323198751215, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323186168302, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, Shaanxi, China), AuthorCompanyExt(id=1307086323215528432, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323186168302, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2西北大学地质学系,大陆动力学国家重点实验室, 陕西西安 710069)]), AuthorCompany(id=1307086323303608817, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, xref=3, ext=[AuthorCompanyExt(id=1307086323316191730, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323303608817, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3Xi'an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment, Xi'an 710069, Shaanxi, China), AuthorCompanyExt(id=1307086323345551859, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323303608817, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3西安市黄土动力灾害防控与地质环境修复重点实验室,陕西 西安 710069)])]), Author(id=1307086324540928523, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307086324629008910, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086324540928523, language=EN, stringName=Kangze YUAN, firstName=Kangze, middleName=null, lastName=YUAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, Shaanxi, China
3Xi'an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment, Xi'an 710069, Shaanxi, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307086324683534863, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, authorId=1307086324540928523, language=CN, stringName=苑康泽, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2西北大学地质学系,大陆动力学国家重点实验室, 陕西西安 710069
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3Xi'an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment, Xi'an 710069, Shaanxi, China), AuthorCompanyExt(id=1307086323345551859, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, companyId=1307086323303608817, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3西安市黄土动力灾害防控与地质环境修复重点实验室,陕西 西安 710069)])], figs=[ArticleFig(id=1307086328340967990, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.1, caption=
Location of the study area, figureFileSmall=7i6EfjX9oowae3vlZrzbdw==, figureFileBig=okd7pq5QIE2hlhir5bS+Ug==, tableContent=null), ArticleFig(id=1307086328424854071, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图1, caption=
研究区地理位置, figureFileSmall=7i6EfjX9oowae3vlZrzbdw==, figureFileBig=okd7pq5QIE2hlhir5bS+Ug==, tableContent=null), ArticleFig(id=1307086328626180664, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.2, caption=
Sampling site, figureFileSmall=EGO+sV9AGP6XruDtCw4HEw==, figureFileBig=mkyr3libGYG3rOeE8vSR5g==, tableContent=null), ArticleFig(id=1307086328710066745, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图2, caption=
取样现场, figureFileSmall=EGO+sV9AGP6XruDtCw4HEw==, figureFileBig=mkyr3libGYG3rOeE8vSR5g==, tableContent=null), ArticleFig(id=1307086328793952826, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.3, caption=
Grain size distribution curves of loess samples from different strata, figureFileSmall=n2UMSxmkeORTH+ITQTE0Cw==, figureFileBig=ds7/d3EZnjZU+jjFjKPoNA==, tableContent=null), ArticleFig(id=1307086328856867387, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图3, caption=
不同地层黄土样品的粒径分布曲线, figureFileSmall=n2UMSxmkeORTH+ITQTE0Cw==, figureFileBig=ds7/d3EZnjZU+jjFjKPoNA==, tableContent=null), ArticleFig(id=1307086328932364860, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.4, caption=
ZJ-type strain-controlled direct shear apparatus (four-shear set), figureFileSmall=kER/qAoTYuIEe5FKVbQOBA==, figureFileBig=zfl9vc8cAEb6dHZEj0QHAg==, tableContent=null), ArticleFig(id=1307086329007862333, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图4, caption=
ZJ型应变控制式直剪仪(四联剪), figureFileSmall=kER/qAoTYuIEe5FKVbQOBA==, figureFileBig=zfl9vc8cAEb6dHZEj0QHAg==, tableContent=null), ArticleFig(id=1307086329083359806, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.5, caption=
Variable-head permeability test apparatus, figureFileSmall=/HcWVEZYX0ShobJe3GJAUQ==, figureFileBig=Snvsik2bFxCRqNZc7OE9Ww==, tableContent=null), ArticleFig(id=1307086329142080063, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图5, caption=
变水头渗透试验装置, figureFileSmall=/HcWVEZYX0ShobJe3GJAUQ==, figureFileBig=Snvsik2bFxCRqNZc7OE9Ww==, tableContent=null), ArticleFig(id=1307086329221771840, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.6, caption=
Workflow of SEM sample preparation and quantitative image analysis, figureFileSmall=hVL9CA/pRdzf8hwYs3oKng==, figureFileBig=3T+dTHrBRqLrhnXEgVBneQ==, tableContent=null), ArticleFig(id=1307086331075654209, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图6, caption=
SEM 样品制备与图像定量分析流程图, figureFileSmall=hVL9CA/pRdzf8hwYs3oKng==, figureFileBig=3T+dTHrBRqLrhnXEgVBneQ==, tableContent=null), ArticleFig(id=1307086331142763074, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.7, caption=
Variation of shear strength parameters of loess samples at different depths, figureFileSmall=iXkj30rgWkYYy2TCFoP0MQ==, figureFileBig=0cZNwnqoMAwbLCvNgPLeUg==, tableContent=null), ArticleFig(id=1307086331516056131, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图7, caption=
不同层位黄土的抗剪强度参数变化, figureFileSmall=iXkj30rgWkYYy2TCFoP0MQ==, figureFileBig=0cZNwnqoMAwbLCvNgPLeUg==, tableContent=null), ArticleFig(id=1307086331583164996, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.8, caption=
Variation of permeability coefficients of loess samples at different depths, figureFileSmall=wWhX/HFECCkfCOU8G5E/mg==, figureFileBig=lpO03ZiWV4WsV6LVSYgSRg==, tableContent=null), ArticleFig(id=1307086331901932101, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图8, caption=
不同层位黄土样品的渗透系数变化, figureFileSmall=wWhX/HFECCkfCOU8G5E/mg==, figureFileBig=lpO03ZiWV4WsV6LVSYgSRg==, tableContent=null), ArticleFig(id=1307086331994206790, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.9, caption=
SEM images showing microstructural features of loess samples at different depths, figureFileSmall=RfN7ZX4p9TgLh+0xVID9sQ==, figureFileBig=9YiZoyjCJXceJmPNj+bZyg==, tableContent=null), ArticleFig(id=1307086332099064391, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图9, caption=
不同层位黄土样品的微观结构特征, figureFileSmall=RfN7ZX4p9TgLh+0xVID9sQ==, figureFileBig=9YiZoyjCJXceJmPNj+bZyg==, tableContent=null), ArticleFig(id=1307086332388471368, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.10, caption=
Number and area proportion of pores within different size ranges, figureFileSmall=KvUfXCoLtmE+cYoaXytt6Q==, figureFileBig=8MYAyOCYoYmSXAiHV9O8Jg==, tableContent=null), ArticleFig(id=1307086332484940361, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图10, caption=
不同孔径区间内孔隙数量与面积比例a. L1层黄土样品;b. L2层黄土样品;c. L3层黄土样品;d. L4层黄土样品
, figureFileSmall=KvUfXCoLtmE+cYoaXytt6Q==, figureFileBig=8MYAyOCYoYmSXAiHV9O8Jg==, tableContent=null), ArticleFig(id=1307086332749181514, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.11, caption=
Distribution of pore roundness at different depths, figureFileSmall=JLrbRF07ZtZoAcB5/X9H4g==, figureFileBig=YbDsFByEDGzD5x+9MiZifg==, tableContent=null), ArticleFig(id=1307086332812096075, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图11, caption=
不同深度黄土的孔隙圆形度分布, figureFileSmall=JLrbRF07ZtZoAcB5/X9H4g==, figureFileBig=YbDsFByEDGzD5x+9MiZifg==, tableContent=null), ArticleFig(id=1307086332883399244, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.12, caption=
Rose diagrams of pore orientation distribution at different depths, figureFileSmall=4trrO2B6m30bxB3gsdBZYw==, figureFileBig=ALbKwPbKD6DTV74mjz5lwg==, tableContent=null), ArticleFig(id=1307086332967285325, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图12, caption=
不同深度黄土孔隙方向性玫瑰图, figureFileSmall=4trrO2B6m30bxB3gsdBZYw==, figureFileBig=ALbKwPbKD6DTV74mjz5lwg==, tableContent=null), ArticleFig(id=1307086333026005582, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.13, caption=
Pearson correlation results between macro-physical properties and microstructural parameters, figureFileSmall=Je+DDC8gISWGzl5kealUnA==, figureFileBig=hdxua72VpjQFHnlLDEsxFw==, tableContent=null), ArticleFig(id=1307086333105697359, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图13, caption=
宏观物理力学特性与微观结构参数的 Pearson 相关性分析结果, figureFileSmall=Je+DDC8gISWGzl5kealUnA==, figureFileBig=hdxua72VpjQFHnlLDEsxFw==, tableContent=null), ArticleFig(id=1307086333181194832, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Fig.14, caption=
PCA biplot showing variable contributions and sample separation, figureFileSmall=UhbJ8gK6Qh1i4P0WLWY8wg==, figureFileBig=rbM+Jde81fvnSYEx6RlcSA==, tableContent=null), ArticleFig(id=1307086333244109393, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=图14, caption=
黄土样品 PCA 双标图(Biplot), figureFileSmall=UhbJ8gK6Qh1i4P0WLWY8wg==, figureFileBig=rbM+Jde81fvnSYEx6RlcSA==, tableContent=null), ArticleFig(id=1307086333315412562, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Tab.1, caption=
Stratigraphic division and lithological description
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| 地质年代及成因 | 地层编号 | 岩性描述 | 层厚(m) |
| Q3eol | ①黄土(L1) | 褐黄色,可塑,以粉质黏土为主, 大孔隙及虫孔发育,土质疏松 | 6.50~10.40 |
| Q2eol | ②黄土(L2) | 灰黄色,稍湿,以粉质黏土为主,大孔隙、虫孔较发育, 土质疏松,较上部土层稍密实 | 3.70~8.20 |
| ③黄土(L3) | 灰黄色,稍湿,以粉质黏土为主, 大孔隙、虫孔较少,土质较均匀 | 0.60~5.80 |
| ④黄土(L4) | 灰黄色,稍湿~很湿,以粉质黏土为主, 含少量钙质结核和白色菌丝状钙质粉沫 | 1.40~5.75 |
), ArticleFig(id=1307086333403492947, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=CN, label=表1, caption=
地层划分及岩性描述
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| 地质年代及成因 | 地层编号 | 岩性描述 | 层厚(m) |
| Q3eol | ①黄土(L1) | 褐黄色,可塑,以粉质黏土为主, 大孔隙及虫孔发育,土质疏松 | 6.50~10.40 |
| Q2eol | ②黄土(L2) | 灰黄色,稍湿,以粉质黏土为主,大孔隙、虫孔较发育, 土质疏松,较上部土层稍密实 | 3.70~8.20 |
| ③黄土(L3) | 灰黄色,稍湿,以粉质黏土为主, 大孔隙、虫孔较少,土质较均匀 | 0.60~5.80 |
| ④黄土(L4) | 灰黄色,稍湿~很湿,以粉质黏土为主, 含少量钙质结核和白色菌丝状钙质粉沫 | 1.40~5.75 |
), ArticleFig(id=1307086333512544852, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086318417244611, language=EN, label=Tab.2, caption=
Basic physical indicators of non-stratigraphic soil samples
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取样深 度(m) | 地层 | 干密度ρd (g·cm−3) | 含水率 ω(%) | 孔隙率 (n) | Sr饱和 度(%) |
| 5.00 | L1 | 1.37 | 24.78 | 0.49 | 71.09 |
| 15.00 | L2 | 1.38 | 17.31 | 0.49 | 56.04 |
| 20.00 | L3 | 1.39 | 19.75 | 0.48 | 54.32 |
| 25.00 | L4 | 1.49 | 20.92 | 0.45 | 69.55 |
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不同地层土样基本物理指标
, figureFileSmall=null, figureFileBig=null, tableContent=
取样深 度(m) | 地层 | 干密度ρd (g·cm−3) | 含水率 ω(%) | 孔隙率 (n) | Sr饱和 度(%) |
| 5.00 | L1 | 1.37 | 24.78 | 0.49 | 71.09 |
| 15.00 | L2 | 1.38 | 17.31 | 0.49 | 56.04 |
| 20.00 | L3 | 1.39 | 19.75 | 0.48 | 54.32 |
| 25.00 | L4 | 1.49 | 20.92 | 0.45 | 69.55 |
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