{"title":"隧道大变形围岩特征及强度确定方法研究。","authors":"Zhongsheng Tan, Jinpeng Zhao, Zonglin Li, Baojin Zhang","doi":"10.1038/s41598-025-91609-5","DOIUrl":null,"url":null,"abstract":"<p><p>The Haba Snow Mountain Tunnel experienced severe deformation caused by foliated metamorphic basalt. This rock has high metamorphism, easy weathering, and low strength. This study examines the rock's microscopic characteristics and mechanical properties to understand its impact on tunnel stability and offer guidance for similar engineering challenges. Through comprehensive analysis of the rock's composition and structure, combined with mechanical strength testing, the study establishes strong correlations among uniaxial compressive strength, rebound strength, and point load strength. Key findings reveal that the point load index correlates linearly with uniaxial compressive strength (y = 10.97x, R²=0.93). These results not only enhance the understanding of foliated metamorphic basalt's properties but also offer practical recommendations for optimizing strength testing methods. This study provides crucial technical references for tunnel design under similar geological conditions.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"7011"},"PeriodicalIF":3.9000,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11868384/pdf/","citationCount":"0","resultStr":"{\"title\":\"A study on surrounding rock characteristics inducing severe large deformation in tunnels and methods for determining its strength.\",\"authors\":\"Zhongsheng Tan, Jinpeng Zhao, Zonglin Li, Baojin Zhang\",\"doi\":\"10.1038/s41598-025-91609-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The Haba Snow Mountain Tunnel experienced severe deformation caused by foliated metamorphic basalt. This rock has high metamorphism, easy weathering, and low strength. This study examines the rock's microscopic characteristics and mechanical properties to understand its impact on tunnel stability and offer guidance for similar engineering challenges. Through comprehensive analysis of the rock's composition and structure, combined with mechanical strength testing, the study establishes strong correlations among uniaxial compressive strength, rebound strength, and point load strength. Key findings reveal that the point load index correlates linearly with uniaxial compressive strength (y = 10.97x, R²=0.93). These results not only enhance the understanding of foliated metamorphic basalt's properties but also offer practical recommendations for optimizing strength testing methods. This study provides crucial technical references for tunnel design under similar geological conditions.</p>\",\"PeriodicalId\":21811,\"journal\":{\"name\":\"Scientific Reports\",\"volume\":\"15 1\",\"pages\":\"7011\"},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2025-02-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11868384/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Scientific Reports\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://doi.org/10.1038/s41598-025-91609-5\",\"RegionNum\":2,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scientific Reports","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1038/s41598-025-91609-5","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
A study on surrounding rock characteristics inducing severe large deformation in tunnels and methods for determining its strength.
The Haba Snow Mountain Tunnel experienced severe deformation caused by foliated metamorphic basalt. This rock has high metamorphism, easy weathering, and low strength. This study examines the rock's microscopic characteristics and mechanical properties to understand its impact on tunnel stability and offer guidance for similar engineering challenges. Through comprehensive analysis of the rock's composition and structure, combined with mechanical strength testing, the study establishes strong correlations among uniaxial compressive strength, rebound strength, and point load strength. Key findings reveal that the point load index correlates linearly with uniaxial compressive strength (y = 10.97x, R²=0.93). These results not only enhance the understanding of foliated metamorphic basalt's properties but also offer practical recommendations for optimizing strength testing methods. This study provides crucial technical references for tunnel design under similar geological conditions.
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