Performance of large cross-section tunnel constructed in loose ground by optimal multi-step excavation method
Although an appropriate tunnel construction method can be conducive to safeguarding the deformation of surrounding rock mass, too much emphasis on controlling deformation leads to ignoring the importance of accelerating tunnelling speed and saving construction costs. Therefore, this paper presents a...
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Veröffentlicht in: | Arabian journal of geosciences 2020-09, Vol.13 (18), Article 930 |
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creator | Li, Songtao Tan, Zhongsheng Wu, Jinke Du, Wentao |
description | Although an appropriate tunnel construction method can be conducive to safeguarding the deformation of surrounding rock mass, too much emphasis on controlling deformation leads to ignoring the importance of accelerating tunnelling speed and saving construction costs. Therefore, this paper presents a historical case of large cross-section tunnel in loose ground, which was excavated by optimal multi-step excavation method. First, to investigate the influence on rock mass deformation by the centre diaphragm (CD) method and optimal tunnelling method, comparative studies were performed by numerical simulation of the hypothetical construction schemes. Then, field monitoring was carried out to further reveal rock mass deformation and structural load characteristics with optimal excavation method. Numerical simulation results show that, compared with CD method, the optimal construction method is more helpful in controlling tunnel invert uplift but has minor disadvantages of increasing horizontal displacement of surrounding rock mass. However, tunnel crown settlement excavated by CD method is approximately similar to that of optimal construction method. Field test results confirm the effectiveness of optimal tunnelling method on controlling excavation-induced tunnel deformation; the maximum vault settlement and horizontal convergence of drift are approximately 57.5 mm and 8.5 mm, respectively. Moreover, the maximum inside and outside forces of steel set are 172.5 MPa and 151.5 MPa. The rock bolt is subjected mainly to a tensile force with a maximum value of up to 29.3 MPa. Therefore, as the crucial part of initial support structure, steel sets and rock bolts are under appropriate conditions and do not exceed their bearing capacity. |
doi_str_mv | 10.1007/s12517-020-05961-z |
format | Article |
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Therefore, this paper presents a historical case of large cross-section tunnel in loose ground, which was excavated by optimal multi-step excavation method. First, to investigate the influence on rock mass deformation by the centre diaphragm (CD) method and optimal tunnelling method, comparative studies were performed by numerical simulation of the hypothetical construction schemes. Then, field monitoring was carried out to further reveal rock mass deformation and structural load characteristics with optimal excavation method. Numerical simulation results show that, compared with CD method, the optimal construction method is more helpful in controlling tunnel invert uplift but has minor disadvantages of increasing horizontal displacement of surrounding rock mass. However, tunnel crown settlement excavated by CD method is approximately similar to that of optimal construction method. Field test results confirm the effectiveness of optimal tunnelling method on controlling excavation-induced tunnel deformation; the maximum vault settlement and horizontal convergence of drift are approximately 57.5 mm and 8.5 mm, respectively. Moreover, the maximum inside and outside forces of steel set are 172.5 MPa and 151.5 MPa. The rock bolt is subjected mainly to a tensile force with a maximum value of up to 29.3 MPa. Therefore, as the crucial part of initial support structure, steel sets and rock bolts are under appropriate conditions and do not exceed their bearing capacity.</description><identifier>ISSN: 1866-7511</identifier><identifier>EISSN: 1866-7538</identifier><identifier>DOI: 10.1007/s12517-020-05961-z</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Approximation ; Bearing capacity ; Comparative analysis ; Comparative studies ; Computer simulation ; Construction ; Construction costs ; Cross-sections ; Deformation ; Deformation effects ; Dredging ; Earth and Environmental Science ; Earth science ; Earth Sciences ; Excavation ; Field tests ; Mathematical models ; Original Paper ; Rock bolts ; Rock masses ; Rocks ; Simulation ; Steel ; Tunnel construction ; Tunneling ; Tunnels ; Uplift</subject><ispartof>Arabian journal of geosciences, 2020-09, Vol.13 (18), Article 930</ispartof><rights>Saudi Society for Geosciences 2020</rights><rights>Saudi Society for Geosciences 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a342t-600e33883715263bb3a581e13e1fcf6582499c256f2996665e9ab5678dc8bd243</citedby><cites>FETCH-LOGICAL-a342t-600e33883715263bb3a581e13e1fcf6582499c256f2996665e9ab5678dc8bd243</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12517-020-05961-z$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12517-020-05961-z$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Li, Songtao</creatorcontrib><creatorcontrib>Tan, Zhongsheng</creatorcontrib><creatorcontrib>Wu, Jinke</creatorcontrib><creatorcontrib>Du, Wentao</creatorcontrib><title>Performance of large cross-section tunnel constructed in loose ground by optimal multi-step excavation method</title><title>Arabian journal of geosciences</title><addtitle>Arab J Geosci</addtitle><description>Although an appropriate tunnel construction method can be conducive to safeguarding the deformation of surrounding rock mass, too much emphasis on controlling deformation leads to ignoring the importance of accelerating tunnelling speed and saving construction costs. Therefore, this paper presents a historical case of large cross-section tunnel in loose ground, which was excavated by optimal multi-step excavation method. First, to investigate the influence on rock mass deformation by the centre diaphragm (CD) method and optimal tunnelling method, comparative studies were performed by numerical simulation of the hypothetical construction schemes. Then, field monitoring was carried out to further reveal rock mass deformation and structural load characteristics with optimal excavation method. Numerical simulation results show that, compared with CD method, the optimal construction method is more helpful in controlling tunnel invert uplift but has minor disadvantages of increasing horizontal displacement of surrounding rock mass. However, tunnel crown settlement excavated by CD method is approximately similar to that of optimal construction method. Field test results confirm the effectiveness of optimal tunnelling method on controlling excavation-induced tunnel deformation; the maximum vault settlement and horizontal convergence of drift are approximately 57.5 mm and 8.5 mm, respectively. Moreover, the maximum inside and outside forces of steel set are 172.5 MPa and 151.5 MPa. The rock bolt is subjected mainly to a tensile force with a maximum value of up to 29.3 MPa. Therefore, as the crucial part of initial support structure, steel sets and rock bolts are under appropriate conditions and do not exceed their bearing capacity.</description><subject>Approximation</subject><subject>Bearing capacity</subject><subject>Comparative analysis</subject><subject>Comparative studies</subject><subject>Computer simulation</subject><subject>Construction</subject><subject>Construction costs</subject><subject>Cross-sections</subject><subject>Deformation</subject><subject>Deformation effects</subject><subject>Dredging</subject><subject>Earth and Environmental Science</subject><subject>Earth science</subject><subject>Earth Sciences</subject><subject>Excavation</subject><subject>Field tests</subject><subject>Mathematical models</subject><subject>Original Paper</subject><subject>Rock bolts</subject><subject>Rock masses</subject><subject>Rocks</subject><subject>Simulation</subject><subject>Steel</subject><subject>Tunnel construction</subject><subject>Tunneling</subject><subject>Tunnels</subject><subject>Uplift</subject><issn>1866-7511</issn><issn>1866-7538</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAUhYsoOI7-AVcB19E8mjRdyuALBF3oOqTp7dihTWqSijO_3joV3bm6Z3HOuZwvy84puaSEFFeRMkELTBjBRJSS4t1BtqBKSlwIrg5_NaXH2UmMG0KkIoVaZP0zhMaH3jgLyDeoM2ENyAYfI45gU-sdSqNz0CHrXUxhtAlq1DrUeR8BrYMfXY2qLfJDanvToX7sUotjggHBpzUfZt_RQ3rz9Wl21JguwtnPXWavtzcvq3v8-HT3sLp-xIbnLGFJCHCuFC-oYJJXFTdCUaAcaGMbKRTLy9IyIRtWllJKAaWphCxUbVVVs5wvs4u5dwj-fYSY9MaPwU0vNctzykrOiZpcbHbt5wZo9BCmCWGrKdHfWPWMVU9Y9R6r3k0hPofiZHZrCH_V_6S-AOztfIU</recordid><startdate>20200901</startdate><enddate>20200901</enddate><creator>Li, Songtao</creator><creator>Tan, Zhongsheng</creator><creator>Wu, Jinke</creator><creator>Du, Wentao</creator><general>Springer International Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>20200901</creationdate><title>Performance of large cross-section tunnel constructed in loose ground by optimal multi-step excavation method</title><author>Li, Songtao ; Tan, Zhongsheng ; Wu, Jinke ; Du, Wentao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a342t-600e33883715263bb3a581e13e1fcf6582499c256f2996665e9ab5678dc8bd243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Approximation</topic><topic>Bearing capacity</topic><topic>Comparative analysis</topic><topic>Comparative studies</topic><topic>Computer simulation</topic><topic>Construction</topic><topic>Construction costs</topic><topic>Cross-sections</topic><topic>Deformation</topic><topic>Deformation effects</topic><topic>Dredging</topic><topic>Earth and Environmental Science</topic><topic>Earth science</topic><topic>Earth Sciences</topic><topic>Excavation</topic><topic>Field tests</topic><topic>Mathematical models</topic><topic>Original Paper</topic><topic>Rock bolts</topic><topic>Rock masses</topic><topic>Rocks</topic><topic>Simulation</topic><topic>Steel</topic><topic>Tunnel construction</topic><topic>Tunneling</topic><topic>Tunnels</topic><topic>Uplift</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Songtao</creatorcontrib><creatorcontrib>Tan, Zhongsheng</creatorcontrib><creatorcontrib>Wu, Jinke</creatorcontrib><creatorcontrib>Du, Wentao</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Arabian journal of geosciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Songtao</au><au>Tan, Zhongsheng</au><au>Wu, Jinke</au><au>Du, Wentao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Performance of large cross-section tunnel constructed in loose ground by optimal multi-step excavation method</atitle><jtitle>Arabian journal of geosciences</jtitle><stitle>Arab J Geosci</stitle><date>2020-09-01</date><risdate>2020</risdate><volume>13</volume><issue>18</issue><artnum>930</artnum><issn>1866-7511</issn><eissn>1866-7538</eissn><abstract>Although an appropriate tunnel construction method can be conducive to safeguarding the deformation of surrounding rock mass, too much emphasis on controlling deformation leads to ignoring the importance of accelerating tunnelling speed and saving construction costs. Therefore, this paper presents a historical case of large cross-section tunnel in loose ground, which was excavated by optimal multi-step excavation method. First, to investigate the influence on rock mass deformation by the centre diaphragm (CD) method and optimal tunnelling method, comparative studies were performed by numerical simulation of the hypothetical construction schemes. Then, field monitoring was carried out to further reveal rock mass deformation and structural load characteristics with optimal excavation method. Numerical simulation results show that, compared with CD method, the optimal construction method is more helpful in controlling tunnel invert uplift but has minor disadvantages of increasing horizontal displacement of surrounding rock mass. However, tunnel crown settlement excavated by CD method is approximately similar to that of optimal construction method. Field test results confirm the effectiveness of optimal tunnelling method on controlling excavation-induced tunnel deformation; the maximum vault settlement and horizontal convergence of drift are approximately 57.5 mm and 8.5 mm, respectively. Moreover, the maximum inside and outside forces of steel set are 172.5 MPa and 151.5 MPa. The rock bolt is subjected mainly to a tensile force with a maximum value of up to 29.3 MPa. Therefore, as the crucial part of initial support structure, steel sets and rock bolts are under appropriate conditions and do not exceed their bearing capacity.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s12517-020-05961-z</doi></addata></record> |
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subjects | Approximation Bearing capacity Comparative analysis Comparative studies Computer simulation Construction Construction costs Cross-sections Deformation Deformation effects Dredging Earth and Environmental Science Earth science Earth Sciences Excavation Field tests Mathematical models Original Paper Rock bolts Rock masses Rocks Simulation Steel Tunnel construction Tunneling Tunnels Uplift |
title | Performance of large cross-section tunnel constructed in loose ground by optimal multi-step excavation method |
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