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Analysis of large deformation of deep-buried brittle rock tunnel in strong tectonic active area based on macro and microcrack evolution
Bao, Han1; Liu, Changqing1; Liang, Ning2,4; Lan, Hengxing3; Yan, Changgen1; Xu, Xunhui1
2022-08-01
Source PublicationENGINEERING FAILURE ANALYSIS
ISSN1350-6307
Volume138Pages:17
AbstractThe large deformation is a common engineering problem during tunnel excavation. For brittle rock tunnels, the large deformation is closely related to the rock mass structure. In this study, taking the Guanshan tunnel as an example, large deformation of a deep-buried brittle rock tunnel in a strong tectonic active area was analyzed. The large deformation was explained in terms of the surrounding rock (diorite) mechanical properties and the development and evolution of macro and microcracks. The results showed that the diorite in the Guanshan mountain is characterized by high strength and brittleness. However, numerous microcracks are developed in the diorite, which can easily induce a cataclastic brittle failure of the surrounding rock by the transformation of the stress field. In terms of the spatial distribution, the macro and microcracks in the sur-rounding rock have a good unified relationship, whose development mechanism is related to strong tectonic activity. The stress environment of the surrounding rock changed during the tunnel excavation. A borehole camera revealed that the large deformation of the Guanshan tunnel is synthetically influenced by the macro and microcracks in the surrounding rock. The defor-mation includes the relaxation of the original macrocracks, fracture of the microcracks, and rock dilatation caused by the opening of the microcracks, among which the fracture of microcracks is the dominance. This study provides a new concept for analyzing large deformation in brittle rock tunnels, indicating that the negative effects on the stability of the surrounding rock induced by the development and evolution of microcracks should be fully considered in strong tectonic active areas.
KeywordTunnel Large deformation Brittle surrounding rock Macro and microcracks evolution Tectonic activity
DOI10.1016/j.engfailanal.2022.106351
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province
WOS KeywordUNDERGROUND CAVERN GROUP ; EXCAVATION DAMAGED ZONE ; SOFT ; FAILURE ; MODEL ; MASS ; MECHANISMS ; POWERHOUSE
Language英语
Funding ProjectNational Natural Science Foundation of China[42177142] ; National Natural Science Foundation of China[41790443,41927806] ; National Natural Science Foundation of China[41941019] ; National Key R&D Program of China[2019YFC1520601] ; Natural Science Foundation of Shaanxi Province[2020JQ-349]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province ; Natural Science Foundation of Shaanxi Province
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Characterization & Testing
WOS IDWOS:000798986300003
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105932
Collection页岩气与地质工程院重点实验室
Corresponding AuthorLiang, Ning
Affiliation1.Changan Univ, Sch Highway, Xi'an 710064, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.Changan Univ, Sch Geol Engn & Geomatics, Xi'an 710064, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China
Corresponding Author AffilicationKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences;  Institute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Bao, Han,Liu, Changqing,Liang, Ning,et al. Analysis of large deformation of deep-buried brittle rock tunnel in strong tectonic active area based on macro and microcrack evolution[J]. ENGINEERING FAILURE ANALYSIS,2022,138:17.
APA Bao, Han,Liu, Changqing,Liang, Ning,Lan, Hengxing,Yan, Changgen,&Xu, Xunhui.(2022).Analysis of large deformation of deep-buried brittle rock tunnel in strong tectonic active area based on macro and microcrack evolution.ENGINEERING FAILURE ANALYSIS,138,17.
MLA Bao, Han,et al."Analysis of large deformation of deep-buried brittle rock tunnel in strong tectonic active area based on macro and microcrack evolution".ENGINEERING FAILURE ANALYSIS 138(2022):17.
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