Article(id=1308454741034422338, tenantId=1146029695717560320, journalId=1146123302524792850, issueId=1308454712513156008, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1672-6073.2026.04.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1753200000000, receivedDateStr=2025-07-23, revisedDate=1772726400000, revisedDateStr=2026-03-06, acceptedDate=null, acceptedDateStr=null, onlineDate=1789889520176, onlineDateStr=2026-09-20, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789889520176, onlineIssueDateStr=2026-09-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789889520176, creator=13701087609, updateTime=1789889520176, updator=13701087609, issue=Issue{id=1308454712513156008, tenantId=1146029695717560320, journalId=1146123302524792850, year='2026', volume='39', issue='4', pageStart='1', pageEnd='197', issueExtLink='null', onlineDate='null', pubDate='1786291200000', pubDateStr='2026-08-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1789889513376, creator='13701087609', updateTime=1789889839088, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1308456079029986178, tenantId=1146029695717560320, journalId=1146123302524792850, issueId=1308454712513156008, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1308456079029986179, tenantId=1146029695717560320, journalId=1146123302524792850, issueId=1308454712513156008, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=131, endPage=140, ext={EN=ArticleExt(id=1308454741562904644, articleId=1308454741034422338, tenantId=1146029695717560320, journalId=1146123302524792850, language=EN, title=Active Macro-Micro Performance Regulation Method for Weakly Expansive Soils, columnId=1308454741495795779, journalTitle=Urban Rapid Rail Transit, columnName=Intelligent Tunnel Diagnostics and Remediation, runingTitle=null, highlight=null, articleAbstract=

Expansive soils, due to the water sensitivity of clay minerals such as montmorillonite and their lattice swelling characteristics, are prone to significant swelling and shrinkage deformation, which seriously threatens the safety and stability of urban rail transit engineering structures such as tunnels and subgrades. In response to issues such as high energy consumption, high carbon emissions, and insufficient durability associated with traditional cementitious material stabilization techniques, this study proposes an active performance regulation method for weakly expansive soils. By developing a novel environmentally friendly stabilizer and a cement-lime composite regulating agent, the macro- and micro-mechanical properties of weakly expansive soils are dynamically regulated, achieving comprehensive improvements in their mechanical performance, durability, and environmental friendliness. Based on multi-scale testing methods, it is revealed that the stabilizer can actively regulate the soil microstructure and mechanical properties through the synergistic effects of multiple mechanisms, including ion exchange, gel network formation, physical filling, and skeleton reinforcement. The results indicate that the cement-lime-stabilizer composite system significantly enhances the mechanical properties and durability of expansive soil. The core mechanism lies in the targeted filling of pores by cementitious materials at the microscopic level and the construction of a three-dimensional network structure. The recommended optimal mix ratio for engineering improvement is cement : lime : stabilizer = 3% : 3% : 0.02%. This ratio ensures the effectiveness of improvement while substantially reducing the amounts of cement and lime used, effectively controlling engineering costs. From the perspective of chemical-physical synergistic regulation, this study provides theoretical support and a technical pathway for the green and efficient improvement of expansive soils.

, authors=Dechun Lu¹, Tao Cai¹, Fei Guo², Guosheng Wang¹, Yu Jiang², Xiuli Du¹, authorsList=Dechun Lu, Tao Cai, Fei Guo, Guosheng Wang, Yu Jiang, Xiuli Du, authorCompany=null, correspAuthors=Guosheng Wang, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, 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=1308454742733115462, articleId=1308454741034422338, tenantId=1146029695717560320, journalId=1146123302524792850, language=CN, title=弱膨胀土宏-微观性能主动调控方法, columnId=1308454741864894533, journalTitle=都市快轨交通, columnName=隧道智能诊断与治理, runingTitle=null, highlight=null, articleAbstract=

膨胀土因蒙脱石等黏土矿物的水敏感性及晶格吸胀特性，易产生显著的胀缩变形，严重威胁城市轨道交通隧道工程等结构的安全与稳定。针对传统凝胶材料固化技术的高能耗、高碳排放及耐久性不足等问题，提出一种弱膨胀土的性能主动调控方法。通过研发新型环保型固化剂与水泥-石灰复合调控剂，对弱膨胀土的宏-微观力学性能进行动态调控，实现其力学性能、耐久性与环保性的全面提升。基于多尺度试验方法，揭示固化剂通过离子交换、凝胶网络形成、物理填充及骨架强化等多重机制协同作用，可主动调控土体微结构与力学性能。结果表明：水泥-石灰-固化剂复合体系显著提升膨胀土的力学性能与耐久性能，其核心在于微观层面胶凝物质对孔隙的定向填充及三维网络结构的构建；推荐工程最佳改良配合比为水泥∶石灰∶固化剂为3%∶3%∶0.02%。该配比在保证改良效果的同时，可大幅减少水泥和石灰的用量，有效控制工程成本。本研究从化学-物理协同调控角度，为绿色高效改良膨胀土提供理论支撑与技术路径。

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路德春，男，博士，教授，主要从事岩土与城市地下工程领域研究，dechun@bjut.edu.cn

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路德春，男，博士，教授，主要从事岩土与城市地下工程领域研究，dechun@bjut.edu.cn

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