Research on Construction Methods for Ultralarge Y-Shaped Tunnel Sections
Many problems are encountered in the construction of bifurcated tunnels due the abrupt change in section, small clear distance, and large section. Progress in the direction of tunnel construction is limited by the large-span section; therefore, a special method of construction that involves construc...
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| Veröffentlicht in: | Mathematical problems in engineering 2021, Vol.2021, p.1-9 |
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| container_title | Mathematical problems in engineering |
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| creator | Cao, Shiding Xie, Yongli Tang, Wei Wang, Wei Zhou, Qianru Guo, Aipeng |
| description | Many problems are encountered in the construction of bifurcated tunnels due the abrupt change in section, small clear distance, and large section. Progress in the direction of tunnel construction is limited by the large-span section; therefore, a special method of construction that involves constructing a guiding tunnel first followed by reverse excavation was adopted to construct the large-span bifurcation section of the Liantang tunnel of Shenzhen Eastern Transit Expressway in China. The stability criterion of the surrounding rock of the middle wall in the section of multiple arch and small clear distance is studied by theoretical analysis, and the internal stress and corresponding ultimate strength of the middle wall under different buried depths and widths of the middle wall are calculated by the stability criterion. In this study, 3D finite-difference software was used to simulate the excavation process under forward and reverse excavation conditions. The results show that the displacement field and internal force field distribution are similar for both excavation methods, and the tunneling first and reverse excavation construction method is safe and reliable. |
| doi_str_mv | 10.1155/2021/9969208 |
| format | Article |
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Progress in the direction of tunnel construction is limited by the large-span section; therefore, a special method of construction that involves constructing a guiding tunnel first followed by reverse excavation was adopted to construct the large-span bifurcation section of the Liantang tunnel of Shenzhen Eastern Transit Expressway in China. The stability criterion of the surrounding rock of the middle wall in the section of multiple arch and small clear distance is studied by theoretical analysis, and the internal stress and corresponding ultimate strength of the middle wall under different buried depths and widths of the middle wall are calculated by the stability criterion. In this study, 3D finite-difference software was used to simulate the excavation process under forward and reverse excavation conditions. The results show that the displacement field and internal force field distribution are similar for both excavation methods, and the tunneling first and reverse excavation construction method is safe and reliable.</description><identifier>ISSN: 1024-123X</identifier><identifier>EISSN: 1563-5147</identifier><identifier>DOI: 10.1155/2021/9969208</identifier><language>eng</language><publisher>New York: Hindawi</publisher><subject>Bifurcations ; Concrete ; Construction ; Construction methods ; Excavation ; Field study ; Finite difference method ; Force distribution ; Internal forces ; Methods ; Reinforced concrete ; Residual stress ; Simulation ; Stability criteria ; Stress concentration ; Tunnel construction ; Ultimate tensile strength</subject><ispartof>Mathematical problems in engineering, 2021, Vol.2021, p.1-9</ispartof><rights>Copyright © 2021 Shiding Cao et al.</rights><rights>Copyright © 2021 Shiding Cao 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>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-e7226f6148496807268b8a7877aa621f3342422bb862a1df01f49f5e121179143</citedby><cites>FETCH-LOGICAL-c376t-e7226f6148496807268b8a7877aa621f3342422bb862a1df01f49f5e121179143</cites><orcidid>0000-0002-1222-5931 ; 0000-0001-7134-1062</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,4024,27923,27924,27925</link.rule.ids></links><search><contributor>Meng, Qingxiang</contributor><contributor>Qingxiang Meng</contributor><creatorcontrib>Cao, Shiding</creatorcontrib><creatorcontrib>Xie, Yongli</creatorcontrib><creatorcontrib>Tang, Wei</creatorcontrib><creatorcontrib>Wang, Wei</creatorcontrib><creatorcontrib>Zhou, Qianru</creatorcontrib><creatorcontrib>Guo, Aipeng</creatorcontrib><title>Research on Construction Methods for Ultralarge Y-Shaped Tunnel Sections</title><title>Mathematical problems in engineering</title><description>Many problems are encountered in the construction of bifurcated tunnels due the abrupt change in section, small clear distance, and large section. Progress in the direction of tunnel construction is limited by the large-span section; therefore, a special method of construction that involves constructing a guiding tunnel first followed by reverse excavation was adopted to construct the large-span bifurcation section of the Liantang tunnel of Shenzhen Eastern Transit Expressway in China. The stability criterion of the surrounding rock of the middle wall in the section of multiple arch and small clear distance is studied by theoretical analysis, and the internal stress and corresponding ultimate strength of the middle wall under different buried depths and widths of the middle wall are calculated by the stability criterion. In this study, 3D finite-difference software was used to simulate the excavation process under forward and reverse excavation conditions. The results show that the displacement field and internal force field distribution are similar for both excavation methods, and the tunneling first and reverse excavation construction method is safe and reliable.</description><subject>Bifurcations</subject><subject>Concrete</subject><subject>Construction</subject><subject>Construction methods</subject><subject>Excavation</subject><subject>Field study</subject><subject>Finite difference method</subject><subject>Force distribution</subject><subject>Internal forces</subject><subject>Methods</subject><subject>Reinforced concrete</subject><subject>Residual stress</subject><subject>Simulation</subject><subject>Stability criteria</subject><subject>Stress concentration</subject><subject>Tunnel construction</subject><subject>Ultimate tensile strength</subject><issn>1024-123X</issn><issn>1563-5147</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>RHX</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp90E1Lw0AQBuBFFKzVmz8g4FFjd2Y_c5SiVqgItgU9hW2ya1Jitu4miP_e1PbsaWbgYYZ5CbkEegsgxAQpwiTLZIZUH5ERCMlSAVwdDz1FngKyt1NyFuOGDlKAHpHZq43WhKJKfJtMfRu70BddPQzPtqt8GRPnQ7JqumAaEz5s8p4uKrO1ZbLs29Y2ycL-8XhOTpxpor041DFZPdwvp7N0_vL4NL2bpwVTskutQpROAtc8k5oqlHqtjdJKGSMRHGMcOeJ6rSUaKB0FxzMnLCCAyoCzMbna790G_9Xb2OUb34d2OJmjQD68yXCnbvaqCD7GYF2-DfWnCT850HyXVb7LKj9kNfDrPa_qtjTf9f_6F8KwZlc</recordid><startdate>2021</startdate><enddate>2021</enddate><creator>Cao, Shiding</creator><creator>Xie, Yongli</creator><creator>Tang, Wei</creator><creator>Wang, Wei</creator><creator>Zhou, Qianru</creator><creator>Guo, Aipeng</creator><general>Hindawi</general><general>Hindawi Limited</general><scope>RHU</scope><scope>RHW</scope><scope>RHX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>CWDGH</scope><scope>DWQXO</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JQ2</scope><scope>K7-</scope><scope>KR7</scope><scope>L6V</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><orcidid>https://orcid.org/0000-0002-1222-5931</orcidid><orcidid>https://orcid.org/0000-0001-7134-1062</orcidid></search><sort><creationdate>2021</creationdate><title>Research on Construction Methods for Ultralarge Y-Shaped Tunnel Sections</title><author>Cao, Shiding ; 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Progress in the direction of tunnel construction is limited by the large-span section; therefore, a special method of construction that involves constructing a guiding tunnel first followed by reverse excavation was adopted to construct the large-span bifurcation section of the Liantang tunnel of Shenzhen Eastern Transit Expressway in China. The stability criterion of the surrounding rock of the middle wall in the section of multiple arch and small clear distance is studied by theoretical analysis, and the internal stress and corresponding ultimate strength of the middle wall under different buried depths and widths of the middle wall are calculated by the stability criterion. In this study, 3D finite-difference software was used to simulate the excavation process under forward and reverse excavation conditions. 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| subjects | Bifurcations Concrete Construction Construction methods Excavation Field study Finite difference method Force distribution Internal forces Methods Reinforced concrete Residual stress Simulation Stability criteria Stress concentration Tunnel construction Ultimate tensile strength |
| title | Research on Construction Methods for Ultralarge Y-Shaped Tunnel Sections |
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