Article(id=1208054448803385567, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1208054446576215005, articleNumber=1671-1807(2025)13-0064-08, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1731686400000, receivedDateStr=2024-11-16, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1765952225160, onlineDateStr=2025-12-17, pubDate=1752076800000, pubDateStr=2025-07-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1765952225160, onlineIssueDateStr=2025-12-17, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1765952225160, creator=13701087609, updateTime=1765952225160, updator=13701087609, issue=Issue{id=1208054446576215005, tenantId=1146029695717560320, journalId=1146123222451335185, year='2025', volume='25', issue='13', pageStart='1', pageEnd='310', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1765952224630, creator=13701087609, updateTime=1765952288340, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1208054713870815567, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1208054446576215005, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1208054713870815568, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1208054446576215005, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=64, endPage=71, ext={EN=ArticleExt(id=1208054449193455853, articleId=1208054448803385567, tenantId=1146029695717560320, journalId=1146123222451335185, language=EN, title=Formation Mechanism of Stiffness in Red Bed Soil-rock Mixtures under Different Particle Size Distributions, columnId=1151876674645226399, journalTitle=Science Technology and Industry, columnName=Technology Innovation, runingTitle=null, highlight=null, articleAbstract=
Revealing the effect of particle size distribution (PSD) to the stiffness characteristics of the red stratum soil-rock mixture (RS S-RM) has significant implications for the subgrade construction, with Sichuan Basin as a representative. 20 large-scale triaxial tests with different PSDs were conducted. Introducing the concept of effective dominant skeleton size ( ), digital image processing technology was utilized to collect the . The relative dominance ratio ( ) describing the structural skeleton changes after the test was defined. The response of the stiffness characteristics of the RS S-RM regarding confining pressure ( ) and were investigated. Validation experiment and related research verify the credibility of the formation mechanism of stiffness. The results indicate that as the shearing process, more and more particles near the shear plane transition from their initial interlocking state to sliding friction. Consequently, the soil-stone framework evolves from a suspended-dense structure to a skeleton-dense structure, and finally transforms into a skeleton-void structure; the initial deformation modulus ( ) relationship with and follows: . The relationship between the tangent deformation modulus ( ) of the specimen at failure is . Validation experiment and related research confirmed the response of and to and . The stiffness characteristics of the RS S-RM can be predicted solely based on the PSD and .
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揭示粒度分布(PSD)对红层土石混合体的刚度影响规律对以四川盆地为代表的道路建设具有重要意义。通过20组不同PSD的大型三轴试验,引入有效支配骨架尺寸( )的概念,利用数字图像处理技术统计红层土石混合体试验前后的ded,定义试验后骨架变化的相对支配比(Dd),探究红层土石混合体刚度特性对围压( )和Dd的响应,并通过试验和相关研究验证红层土石混合体刚度形成机制。结果表明,随着剪切持续发展,剪切面附近越来越多的颗粒从初始咬合状态转变为滑动摩擦,土石骨架从悬浮-密实结构转变为骨架-密实结构,最后变为骨架-空隙结构;初始变形模量( )与 和 的关系为 ;试样破坏时轴应变 的切线变形模量()与 和 的关系为 。验证试验和相关研究证实了 和 对 和 的响应,可以仅由红层土石混合体的PSD和 预测其刚度特性。
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夏冕(1989—),男,四川成都人,硕士,工程师,研究方向为路基工程
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武琨璐(1998—),女,陕西榆林人,硕士,助理工程师,研究方向为路基工程;
何卓岭(1997—),男,四川巴中人,博士研究生,研究方向为路基工程。
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| 指标 | 粉质黏土 | 中风化粉砂质泥岩 |
| 天然密度ρ/(g·cm-3) | 1.78 | 2.56 |
| 天然含水量w/% | 16.67 | 1.92 |
| 土粒相对密度Gs | 2.72 | - |
| 内摩擦角/(°) | 27.07 | 38.40 |
| 黏聚力c/kPa | 25.32 | 560.00 |
| 天然单轴抗压强度σc/MPa | - | 6.38 |
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| 指标 | 粉质黏土 | 中风化粉砂质泥岩 |
| 天然密度ρ/(g·cm-3) | 1.78 | 2.56 |
| 天然含水量w/% | 16.67 | 1.92 |
| 土粒相对密度Gs | 2.72 | - |
| 内摩擦角/(°) | 27.07 | 38.40 |
| 黏聚力c/kPa | 25.32 | 560.00 |
| 天然单轴抗压强度σc/MPa | - | 6.38 |
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