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ÂÛÎÄÌâÄ¿£º 1¡¢AZ Lu, HY Chen, Y Qin, N Zhang. Shape optimisation of the support section of a tunnel at great depths[J]. Computers and Geotechnics, 2014, 61: 190¨C197. (¿´ÊÇ·ñÒÑSCIÊÕ¼) 2¡¢Aizhong Lu, Ning Zhang, Hongyu Chen, Yuan Qin, Luqin Zhang. Analytic stress solutions for a circular pressure tunnel at great depth including support delay and pure slip boundary condition. In Proceedings of Conference on The 2014 ISRM European Rock Mechanics Symposium, Vigo, Spain, 27-29th May 2014. (¿´ÊÇ·ñ±»EI»òÕßISTPÊÕ¼) ллÁË£¡ |
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Accession number: 20142217771325 Title: Analytic stress solutions for a circular pressure tunnel at great depth including support delay and pure slip boundary condition Authors: Lu, A.Z.1; Zhang, N.1; Chen, H.Y.1; Qin, Y.1; Zhang, L.Q.2 Author affiliation: 1 Institute of Hydroelectric and Geotechnical Engineering, North China Electric Power University, Beijing, China 2 Key Laboratory of Engineering Geomechanics, Institute of Geology and geophysics, Chinese Academy of Sciences, Beijing, China Source title: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium Abbreviated source title: Rock Eng. Rock Mech.: Struct. Rock Masses - Proc. EUROCK, ISRM Eur. Reg. Symp. Monograph title: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium Issue date: 2014 Publication year: 2014 Pages: 1003-1008 Language: English ISBN-13: 9781138001497 Document type: Conference article (CA) Conference name: 2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014 Conference date: May 26, 2014 - May 28, 2014 Conference location: Vigo, Spain Conference code: 105191 Sponsor: Ayuntamiento de Vigo; Deputacion de Pontevedra; Geobrugg; Colegio Oficial de Ingenieros de Minas del Noroeste; Sibelco; et al., Publisher: Taylor & Francis - Balkema, P.O. Box 447, Leiden, 2300 AK, Netherlands Abstract: Based on the plane elastic complex function method, theoretical analysis on the stress field around a circular tunnel with ring lining subjected to in situ stresses and inner hydrostatic pressure is carried out. The results of two extreme boundary conditions cases, pure slip and pure bond, are compared with each other. The displacement release coefficient is considered. The calculation results show that the magnitude of the deformation completed before lining installation has great effects on the stress distribution in the lining. If the lining is installed at a proper moment, the degree of stress concentration in the lining can be minimized. When theYoung's modulus of the lining is much lower than that of the rock, stress solutions for two extreme boundary condition cases are roughly the same. The smaller the lateral pressure coefficient ¦Ë, the larger the differences between the corresponding stress solutions for two extreme boundary condition cases. © 2014 Taylor & Francis Group, London. Number of references: 13 Main heading: Boundary conditions Controlled terms: Hydrostatic pressure - Linings - Rock mechanics - Rocks Uncontrolled terms: Calculation results - Circular tunnels - Complex functions - Insitu stress - Lateral pressure coefficient - Pressure tunnel - Stress field - Stress solutions Classification code: 481.1 Geology - 502.1 Mine and Quarry Operations - 631.1.1 Liquid Dynamics - 921 Mathematics - 951 Materials Science Database: Compendex Compilation and indexing terms, © 2014 Elsevier Inc. |
3Â¥2014-09-27 15:04:40
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Shape optimisation of the support section of a tunnel at great depths ×÷Õß:Lu, AZ (Lu, A. Z.)[ 1 ] ; Chen, HY (Chen, H. Y.)[ 1 ] ; Qin, Y (Qin, Y.)[ 1 ] ; Zhang, N (Zhang, N.)[ 1 ] COMPUTERS AND GEOTECHNICS ¾í: 61 Ò³: 190-197 DOI: 10.1016/j.compgeo.2014.05.011 ³ö°æÄê: SEP 2014 ²é¿´ÆÚ¿¯ÐÅÏ¢ ÕªÒª The shape optimisation of a cavity is typically performed without considering the previous support, which may significantly reduce the practical significance of such analyses. Even when an excavation section is optimised, failure of the surrounding rock in a tunnel cannot be prevented in the presence of excessive in situ stress. Thus, a support should be established to protect the stability of a tunnel from the failure of the surrounding rock. This study examines the optimal shape of the support that satisfies the optimisation criterion, which minimises the largest tangential stress along the inner edge of the support, for a specific net tunnel size and support strength. The optimisation process is to solve a series of forward problems using the conformal mapping method for a plane elasticity complex function. The tangential stress along the inner edge of the support is selected as the objective function, and the coefficients of the mapping function are considered as the design variables. The minimum value of the objective function is calculated based on the mixed penalty function method and the optimal support shape that satisfies the given constraints can be obtained. The stress state of an optimally shaped tunnel support is significantly improved compared to non-optimal configurations, and the stress concentration along the inner edge of the support is minimised. (C) 2014 Elsevier Ltd. All rights reserved. ¹Ø¼ü´Ê ×÷Õ߹ؼü´Ê:Underground tunnel; Shape optimisation; Conformal mapping; Stress concentration; Mixed penalty function method KeyWords Plus:EVOLUTIONARY PROCEDURE; HARMONIC HOLES ×÷ÕßÐÅÏ¢ ͨѶ×÷ÕßµØÖ·: Lu, AZ (ͨѶ×÷Õß) North China Elect Power Univ, Inst Hydroelect & Geotech Engn, Beijing 102206, Peoples R China. µØÖ·: [ 1 ] North China Elect Power Univ, Inst Hydroelect & Geotech Engn, Beijing 102206, Peoples R China µç×ÓÓʼþµØÖ·:lvaizhong@ncepu.edu.cn »ù½ð×ÊÖúÖÂл »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ Natural Science Foundation of China 11172101 Fundamental Research Funds for the Central Universities NCEPU13QN20 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND Àà±ð / ·ÖÀà Ñо¿·½Ïò:Computer Science; Engineering; Geology Web of Science Àà±ð:Computer Science, Interdisciplinary Applications; Engineering, Geological; Geosciences, Multidisciplinary ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000340305100019 ISSN: 0266-352X µç×Ó ISSN: 1873-7633 ÆÚ¿¯ÐÅÏ¢ Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports® ÆäËûÐÅÏ¢ IDS ºÅ: AN0WQ Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 15 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0 |
2Â¥2014-09-27 15:03:13
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4Â¥2014-09-27 21:12:27
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