Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load
The coupling calculation model of tunnel and surrounding rock is established by the finite difference method, and the main design parameters of lining structure of single-track ballasted tunnel under 40-ton axle load, heavy train load, are studied in combination with cumulative damage mechanism of s...
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| Veröffentlicht in: | Mathematical problems in engineering 2020, Vol.2020 (2020), p.1-9, Article 3181480 |
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| container_title | Mathematical problems in engineering |
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| creator | Niu, Y. B. Li, T. F. Zou, W. H. Guo, X. X. Ma, Z. G. Han, Z. L. Chai, J. F. Ma, W. B. An, Z. L. |
| description | The coupling calculation model of tunnel and surrounding rock is established by the finite difference method, and the main design parameters of lining structure of single-track ballasted tunnel under 40-ton axle load, heavy train load, are studied in combination with cumulative damage mechanism of surrounding rock at tunnel bottom and the fatigue life characteristics of concrete structure at tunnel bottom. The results show that (1) inverted arch shall be set in sections of III-grade and above. Whether an invert is set in sections of II-grade and below shall be determined according to lithology and groundwater conditions. When the surrounding rock condition is good and the tunnel bottom structure (without invert structure) is adopted, the thickness is recommended to be more than 20 cm, and the concrete strength grade should not be lower than C35. (2) Connection mode: the inverted arch and side wall of the tunnel should be connected in sequence to reduce the stress concentration and improve the stress state of the connection part between the inverted arch and the side wall. (3) It is suggested that the rise-span ratio of invert of single-track tunnel should be 1/6 ∼ 1/8; the larger value should be taken when the surrounding rock condition is poor and the small value should be taken when the surrounding rock condition is good. (4) The thickness of inverted arch is recommended to be no less than 20 cm under the condition of V-grade surrounding rock, to be no less than 15 cm under IV-grade surrounding rock, and to be no less than 10 cm under the condition of III-grade surrounding rock and II-grade surrounding rock sections requiring inverted arch. (5) The recommended value of bedding thickness meeting the design service life is 20 cm under the condition of II-grade surrounding rock. |
| doi_str_mv | 10.1155/2020/3181480 |
| format | Article |
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B. ; Li, T. F. ; Zou, W. H. ; Guo, X. X. ; Ma, Z. G. ; Han, Z. L. ; Chai, J. F. ; Ma, W. B. ; An, Z. L.</creator><contributor>Wang, Zheng-zheng ; Zheng-zheng Wang</contributor><creatorcontrib>Niu, Y. B. ; Li, T. F. ; Zou, W. H. ; Guo, X. X. ; Ma, Z. G. ; Han, Z. L. ; Chai, J. F. ; Ma, W. B. ; An, Z. L. ; Wang, Zheng-zheng ; Zheng-zheng Wang</creatorcontrib><description>The coupling calculation model of tunnel and surrounding rock is established by the finite difference method, and the main design parameters of lining structure of single-track ballasted tunnel under 40-ton axle load, heavy train load, are studied in combination with cumulative damage mechanism of surrounding rock at tunnel bottom and the fatigue life characteristics of concrete structure at tunnel bottom. The results show that (1) inverted arch shall be set in sections of III-grade and above. Whether an invert is set in sections of II-grade and below shall be determined according to lithology and groundwater conditions. When the surrounding rock condition is good and the tunnel bottom structure (without invert structure) is adopted, the thickness is recommended to be more than 20 cm, and the concrete strength grade should not be lower than C35. (2) Connection mode: the inverted arch and side wall of the tunnel should be connected in sequence to reduce the stress concentration and improve the stress state of the connection part between the inverted arch and the side wall. (3) It is suggested that the rise-span ratio of invert of single-track tunnel should be 1/6 ∼ 1/8; the larger value should be taken when the surrounding rock condition is poor and the small value should be taken when the surrounding rock condition is good. (4) The thickness of inverted arch is recommended to be no less than 20 cm under the condition of V-grade surrounding rock, to be no less than 15 cm under IV-grade surrounding rock, and to be no less than 10 cm under the condition of III-grade surrounding rock and II-grade surrounding rock sections requiring inverted arch. (5) The recommended value of bedding thickness meeting the design service life is 20 cm under the condition of II-grade surrounding rock.</description><identifier>ISSN: 1024-123X</identifier><identifier>EISSN: 1563-5147</identifier><identifier>DOI: 10.1155/2020/3181480</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Arches ; Concrete properties ; Concrete structures ; Cumulative damage ; Design parameters ; Engineering ; Engineering, Multidisciplinary ; Fatigue life ; Finite difference method ; Groundwater ; Lithology ; Load ; Mathematics ; Mathematics, Interdisciplinary Applications ; Physical Sciences ; Railway tunnels ; Ratios ; Science & Technology ; Service life ; Shafts (machine elements) ; Stress concentration ; Technology ; Thickness ; Trains ; Working conditions</subject><ispartof>Mathematical problems in engineering, 2020, Vol.2020 (2020), p.1-9, Article 3181480</ispartof><rights>Copyright © 2020 W. B. Ma et al.</rights><rights>Copyright © 2020 W. B. Ma et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>14</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000595909800011</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c360t-1d7051abb79144c0bfb80ae05eda4c67c79b7301bd8dc5fb90ecd38254a116aa3</citedby><cites>FETCH-LOGICAL-c360t-1d7051abb79144c0bfb80ae05eda4c67c79b7301bd8dc5fb90ecd38254a116aa3</cites><orcidid>0000-0003-4296-4177</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,4025,27927,27928,27929</link.rule.ids></links><search><contributor>Wang, Zheng-zheng</contributor><contributor>Zheng-zheng Wang</contributor><creatorcontrib>Niu, Y. 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L.</creatorcontrib><title>Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load</title><title>Mathematical problems in engineering</title><addtitle>MATH PROBL ENG</addtitle><description>The coupling calculation model of tunnel and surrounding rock is established by the finite difference method, and the main design parameters of lining structure of single-track ballasted tunnel under 40-ton axle load, heavy train load, are studied in combination with cumulative damage mechanism of surrounding rock at tunnel bottom and the fatigue life characteristics of concrete structure at tunnel bottom. The results show that (1) inverted arch shall be set in sections of III-grade and above. Whether an invert is set in sections of II-grade and below shall be determined according to lithology and groundwater conditions. When the surrounding rock condition is good and the tunnel bottom structure (without invert structure) is adopted, the thickness is recommended to be more than 20 cm, and the concrete strength grade should not be lower than C35. (2) Connection mode: the inverted arch and side wall of the tunnel should be connected in sequence to reduce the stress concentration and improve the stress state of the connection part between the inverted arch and the side wall. (3) It is suggested that the rise-span ratio of invert of single-track tunnel should be 1/6 ∼ 1/8; the larger value should be taken when the surrounding rock condition is poor and the small value should be taken when the surrounding rock condition is good. (4) The thickness of inverted arch is recommended to be no less than 20 cm under the condition of V-grade surrounding rock, to be no less than 15 cm under IV-grade surrounding rock, and to be no less than 10 cm under the condition of III-grade surrounding rock and II-grade surrounding rock sections requiring inverted arch. (5) The recommended value of bedding thickness meeting the design service life is 20 cm under the condition of II-grade surrounding rock.</description><subject>Arches</subject><subject>Concrete properties</subject><subject>Concrete structures</subject><subject>Cumulative damage</subject><subject>Design parameters</subject><subject>Engineering</subject><subject>Engineering, Multidisciplinary</subject><subject>Fatigue life</subject><subject>Finite difference method</subject><subject>Groundwater</subject><subject>Lithology</subject><subject>Load</subject><subject>Mathematics</subject><subject>Mathematics, Interdisciplinary Applications</subject><subject>Physical Sciences</subject><subject>Railway tunnels</subject><subject>Ratios</subject><subject>Science & Technology</subject><subject>Service life</subject><subject>Shafts (machine elements)</subject><subject>Stress concentration</subject><subject>Technology</subject><subject>Thickness</subject><subject>Trains</subject><subject>Working conditions</subject><issn>1024-123X</issn><issn>1563-5147</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>RHX</sourceid><sourceid>AOWDO</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqNkUFv1DAQhSMEEqVw44wscYRQj2NvnGO70C7SSqB2kbhFE2ey65K1i-2w7O_oH8ZlCz3CaUaab94bvSmKl8DfASh1IrjgJxVokJo_Ko5AzapSgawf554LWYKovj4tnsV4zbkABfqouL2kSBjMhnnH3lO0a8c-Y8AtJQqRoevZOSa7nogt7UDMD2w1OUcjO_Mp-S27SmEyaQq_R1fWrUcqVwHNN3aG44gxUc8WhD_25QKnkV2iHXe4_yOys2nDJC9X2f3055hNPPbPiycDjpFe3Nfj4sv5h9V8US4_XXycny5LU814KqGvuQLsuroBKQ3vhk5zJK6oR2lmtambrq44dL3ujRq6hpPpKy2URIAZYnVcvD7o3gT_faKY2ms_BZctWyFnSghd6zpTbw-UCT7GQEN7E-wWw74F3t7F3t7F3t7HnvE3B3xHnR-iseQM_V3hnKtGNbzRuQPItP5_em5TfoV3cz-59GC0sa7Hnf3XWa8ONGWGBnygoZFCQvUL_jWs8Q</recordid><startdate>2020</startdate><enddate>2020</enddate><creator>Niu, Y. 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B.</au><au>Li, T. F.</au><au>Zou, W. H.</au><au>Guo, X. X.</au><au>Ma, Z. G.</au><au>Han, Z. L.</au><au>Chai, J. F.</au><au>Ma, W. B.</au><au>An, Z. L.</au><au>Wang, Zheng-zheng</au><au>Zheng-zheng Wang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load</atitle><jtitle>Mathematical problems in engineering</jtitle><stitle>MATH PROBL ENG</stitle><date>2020</date><risdate>2020</risdate><volume>2020</volume><issue>2020</issue><spage>1</spage><epage>9</epage><pages>1-9</pages><artnum>3181480</artnum><issn>1024-123X</issn><eissn>1563-5147</eissn><abstract>The coupling calculation model of tunnel and surrounding rock is established by the finite difference method, and the main design parameters of lining structure of single-track ballasted tunnel under 40-ton axle load, heavy train load, are studied in combination with cumulative damage mechanism of surrounding rock at tunnel bottom and the fatigue life characteristics of concrete structure at tunnel bottom. The results show that (1) inverted arch shall be set in sections of III-grade and above. Whether an invert is set in sections of II-grade and below shall be determined according to lithology and groundwater conditions. When the surrounding rock condition is good and the tunnel bottom structure (without invert structure) is adopted, the thickness is recommended to be more than 20 cm, and the concrete strength grade should not be lower than C35. (2) Connection mode: the inverted arch and side wall of the tunnel should be connected in sequence to reduce the stress concentration and improve the stress state of the connection part between the inverted arch and the side wall. (3) It is suggested that the rise-span ratio of invert of single-track tunnel should be 1/6 ∼ 1/8; the larger value should be taken when the surrounding rock condition is poor and the small value should be taken when the surrounding rock condition is good. (4) The thickness of inverted arch is recommended to be no less than 20 cm under the condition of V-grade surrounding rock, to be no less than 15 cm under IV-grade surrounding rock, and to be no less than 10 cm under the condition of III-grade surrounding rock and II-grade surrounding rock sections requiring inverted arch. (5) The recommended value of bedding thickness meeting the design service life is 20 cm under the condition of II-grade surrounding rock.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><doi>10.1155/2020/3181480</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0003-4296-4177</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Arches Concrete properties Concrete structures Cumulative damage Design parameters Engineering Engineering, Multidisciplinary Fatigue life Finite difference method Groundwater Lithology Load Mathematics Mathematics, Interdisciplinary Applications Physical Sciences Railway tunnels Ratios Science & Technology Service life Shafts (machine elements) Stress concentration Technology Thickness Trains Working conditions |
| title | Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load |
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