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Article: Model test study of failure modes of surrounding rock for circular caverns

TitleModel test study of failure modes of surrounding rock for circular caverns
Authors
KeywordsFailure mode of surrounding rock
Tunnelling engineering
Similar material
Model test
Issue Date2011
Citation
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering, 2011, v. 30, n. 3, p. 564-571 How to Cite?
AbstractFor studying the deformation and failure modes of tunnel surrounding rock systematically under different continuum media, model tests have been performed on artificial cohesive material and artificial sandy materials. Barite powder, quartz sand and vaseline are the key ingredients of the cohesive similar material. Two types of sandy material made of quartz, and quartz+barite powder are tested respectively. Pressure cell, displacement gauge and non-contact precision measurement are used to monitor the surrounding rock response after excavation, the stress and deformation of the surrounding rock induced by tunnelling and further loading. For cohesive material in the process of step loading, failure first occurs on both sides of the tunnel and then at tunnel crown. According to the displacement and stress monitoring results, in response to the increase in load, the size of plastic zone increases as well. It also reveals that once the plastic zone develops, the rate of deformation in the tunnel surrounding rock will increase. Tunnel excavation in the sandy quartz material does not possess self-stability. However, for sandy material made of quartz and barite, the tunnel remains stable after excavation. For this mixture material, with the increase in applied pressure, failure arch first appears at the tunnel crown which follows the shape of a parabola curve. The arch foot then moves towards the sides of the tunnel. Stability is achieved when it reaches the central axis of the tunnel; at this point, the collapse arch sliding surface is similar to the Platts theory. This series of model tests, which allow the observation of the deformation failure modes for tunnel under different continuum media, provide significant information for the determination of tunnel supporting parameters.
Persistent Identifierhttp://hdl.handle.net/10722/213948
ISSN
2015 SCImago Journal Rankings: 1.073

 

DC FieldValueLanguage
dc.contributor.authorFang, Qian-
dc.contributor.authorZhang, Dingli-
dc.contributor.authorWong, Louis Ngai Yuen-
dc.contributor.authorLi, Pengfei-
dc.contributor.authorLi, Qianqian-
dc.date.accessioned2015-08-19T13:41:19Z-
dc.date.available2015-08-19T13:41:19Z-
dc.date.issued2011-
dc.identifier.citationYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering, 2011, v. 30, n. 3, p. 564-571-
dc.identifier.issn1000-6915-
dc.identifier.urihttp://hdl.handle.net/10722/213948-
dc.description.abstractFor studying the deformation and failure modes of tunnel surrounding rock systematically under different continuum media, model tests have been performed on artificial cohesive material and artificial sandy materials. Barite powder, quartz sand and vaseline are the key ingredients of the cohesive similar material. Two types of sandy material made of quartz, and quartz+barite powder are tested respectively. Pressure cell, displacement gauge and non-contact precision measurement are used to monitor the surrounding rock response after excavation, the stress and deformation of the surrounding rock induced by tunnelling and further loading. For cohesive material in the process of step loading, failure first occurs on both sides of the tunnel and then at tunnel crown. According to the displacement and stress monitoring results, in response to the increase in load, the size of plastic zone increases as well. It also reveals that once the plastic zone develops, the rate of deformation in the tunnel surrounding rock will increase. Tunnel excavation in the sandy quartz material does not possess self-stability. However, for sandy material made of quartz and barite, the tunnel remains stable after excavation. For this mixture material, with the increase in applied pressure, failure arch first appears at the tunnel crown which follows the shape of a parabola curve. The arch foot then moves towards the sides of the tunnel. Stability is achieved when it reaches the central axis of the tunnel; at this point, the collapse arch sliding surface is similar to the Platts theory. This series of model tests, which allow the observation of the deformation failure modes for tunnel under different continuum media, provide significant information for the determination of tunnel supporting parameters.-
dc.languageeng-
dc.relation.ispartofYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering-
dc.subjectFailure mode of surrounding rock-
dc.subjectTunnelling engineering-
dc.subjectSimilar material-
dc.subjectModel test-
dc.titleModel test study of failure modes of surrounding rock for circular caverns-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-79954534389-
dc.identifier.volume30-
dc.identifier.issue3-
dc.identifier.spage564-
dc.identifier.epage571-

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