Field pumping experiments and numerical simulations of shield tunnel dewatering under the Yangtze River
The water conveyance tunnel for the Changshu power plant is located under the riverbed of the Yangtze River. The tunnel passes through muddy silty clay (①) and silty clay (②). Because quicksand and water bursting occurred in the tunnel due to confined water and biogas in layers ② and ③, it can be co...
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| Veröffentlicht in: | Environmental earth sciences 2016-04, Vol.75 (8), p.1, Article 715 |
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| creator | Xu, Baotian Yan, Changhong Sun, Qian Liu, Yunping Hou, Jian Liu, Shi Che, Canhui |
| description | The water conveyance tunnel for the Changshu power plant is located under the riverbed of the Yangtze River. The tunnel passes through muddy silty clay (①) and silty clay (②). Because quicksand and water bursting occurred in the tunnel due to confined water and biogas in layers ② and ③, it can be concluded that the tunnel is intensely affected by the confined aquifer (layer ③). To obtain more accurate hydrogeological parameters of the aquifers, in situ pumping tests were carried out. The tests were divided into five stages and, during the test process, the flux and drawdown were monitored. Based on the measured data, the permeability coefficients of the confined aquifers were calculated by the formula and numerical methods. The calculated results indicate that the parameters derived from the two methods are very similar. The hydraulic connections of the confined aquifers were also inversed from the pumping tests. The dewatering schedule for tunnel recovery was simulated using ModFlow. Based on the numerical simulation, 21 wells, whose screens were installed in layer ③, were designed for the dewatering operation. During pumping, the water levels declined to the drawdown requirement. The results indicate that the dewatering approach is feasible for tunnel recovery and can provide solutions for similar projects. |
| doi_str_mv | 10.1007/s12665-016-5493-9 |
| format | Article |
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The tunnel passes through muddy silty clay (①) and silty clay (②). Because quicksand and water bursting occurred in the tunnel due to confined water and biogas in layers ② and ③, it can be concluded that the tunnel is intensely affected by the confined aquifer (layer ③). To obtain more accurate hydrogeological parameters of the aquifers, in situ pumping tests were carried out. The tests were divided into five stages and, during the test process, the flux and drawdown were monitored. Based on the measured data, the permeability coefficients of the confined aquifers were calculated by the formula and numerical methods. The calculated results indicate that the parameters derived from the two methods are very similar. The hydraulic connections of the confined aquifers were also inversed from the pumping tests. The dewatering schedule for tunnel recovery was simulated using ModFlow. Based on the numerical simulation, 21 wells, whose screens were installed in layer ③, were designed for the dewatering operation. During pumping, the water levels declined to the drawdown requirement. The results indicate that the dewatering approach is feasible for tunnel recovery and can provide solutions for similar projects.</description><identifier>ISSN: 1866-6280</identifier><identifier>EISSN: 1866-6299</identifier><identifier>DOI: 10.1007/s12665-016-5493-9</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Aquifers ; Biogas ; Biogeosciences ; Clay ; Confined aquifers ; Dewatering ; Drawdown ; Earth and Environmental Science ; Earth Sciences ; Environmental Science and Engineering ; Geochemistry ; Geology ; Hydraulics ; Hydrogeology ; Hydrology ; Hydrology/Water Resources ; Original Article ; Permeability ; Pumping tests ; River beds ; Rivers ; Terrestrial Pollution ; Tunnels ; Water conveyance ; Water levels</subject><ispartof>Environmental earth sciences, 2016-04, Vol.75 (8), p.1, Article 715</ispartof><rights>Springer-Verlag Berlin Heidelberg 2016</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a339t-23659497d71a520b2e1156efb02452e07801b5ab81535410c089012581d4b2193</citedby><cites>FETCH-LOGICAL-a339t-23659497d71a520b2e1156efb02452e07801b5ab81535410c089012581d4b2193</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/s12665-016-5493-9$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12665-016-5493-9$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,782,786,27933,27934,41497,42566,51328</link.rule.ids></links><search><creatorcontrib>Xu, Baotian</creatorcontrib><creatorcontrib>Yan, Changhong</creatorcontrib><creatorcontrib>Sun, Qian</creatorcontrib><creatorcontrib>Liu, Yunping</creatorcontrib><creatorcontrib>Hou, Jian</creatorcontrib><creatorcontrib>Liu, Shi</creatorcontrib><creatorcontrib>Che, Canhui</creatorcontrib><title>Field pumping experiments and numerical simulations of shield tunnel dewatering under the Yangtze River</title><title>Environmental earth sciences</title><addtitle>Environ Earth Sci</addtitle><description>The water conveyance tunnel for the Changshu power plant is located under the riverbed of the Yangtze River. The tunnel passes through muddy silty clay (①) and silty clay (②). Because quicksand and water bursting occurred in the tunnel due to confined water and biogas in layers ② and ③, it can be concluded that the tunnel is intensely affected by the confined aquifer (layer ③). To obtain more accurate hydrogeological parameters of the aquifers, in situ pumping tests were carried out. The tests were divided into five stages and, during the test process, the flux and drawdown were monitored. Based on the measured data, the permeability coefficients of the confined aquifers were calculated by the formula and numerical methods. The calculated results indicate that the parameters derived from the two methods are very similar. The hydraulic connections of the confined aquifers were also inversed from the pumping tests. The dewatering schedule for tunnel recovery was simulated using ModFlow. Based on the numerical simulation, 21 wells, whose screens were installed in layer ③, were designed for the dewatering operation. During pumping, the water levels declined to the drawdown requirement. The results indicate that the dewatering approach is feasible for tunnel recovery and can provide solutions for similar projects.</description><subject>Aquifers</subject><subject>Biogas</subject><subject>Biogeosciences</subject><subject>Clay</subject><subject>Confined aquifers</subject><subject>Dewatering</subject><subject>Drawdown</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Environmental Science and Engineering</subject><subject>Geochemistry</subject><subject>Geology</subject><subject>Hydraulics</subject><subject>Hydrogeology</subject><subject>Hydrology</subject><subject>Hydrology/Water Resources</subject><subject>Original Article</subject><subject>Permeability</subject><subject>Pumping tests</subject><subject>River beds</subject><subject>Rivers</subject><subject>Terrestrial Pollution</subject><subject>Tunnels</subject><subject>Water conveyance</subject><subject>Water levels</subject><issn>1866-6280</issn><issn>1866-6299</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1kE9LxDAQxYsouOh-AG8Bz9VM2qTJURZXhQVB9OAppNvpbpc2rUnqv09v6op4cS4zA-_9hnlJcgb0AigtLj0wIXhKQaQ8V1mqDpIZSCFSwZQ6_J0lPU7m3u9orAwyRcUs2SwbbCsyjN3Q2A3B9wFd06ENnhhbETt2cV-blvimG1sTmt560tfEb799YbQWW1LhmwlRGAmjrdCRsEXybOwmfCJ5aF7RnSZHtWk9zn_6SfK0vH5c3Kar-5u7xdUqNVmmQsoywVWuiqoAwxktGQJwgXVJWc4Z0kJSKLkpJfCM50DXVCoKjEuo8pKByk6S8z13cP3LiD7oXT86G09qKCQwRpVkUQV71dr13jus9RC_Nu5DA9VTpHofqY6R6ilSPZHZ3uOH6VF0f8j_mr4AFSh4ew</recordid><startdate>20160401</startdate><enddate>20160401</enddate><creator>Xu, Baotian</creator><creator>Yan, Changhong</creator><creator>Sun, Qian</creator><creator>Liu, Yunping</creator><creator>Hou, Jian</creator><creator>Liu, Shi</creator><creator>Che, Canhui</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7ST</scope><scope>7TG</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>SOI</scope></search><sort><creationdate>20160401</creationdate><title>Field pumping experiments and numerical simulations of shield tunnel dewatering under the Yangtze River</title><author>Xu, Baotian ; Yan, Changhong ; Sun, Qian ; Liu, Yunping ; Hou, Jian ; Liu, Shi ; Che, Canhui</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a339t-23659497d71a520b2e1156efb02452e07801b5ab81535410c089012581d4b2193</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Aquifers</topic><topic>Biogas</topic><topic>Biogeosciences</topic><topic>Clay</topic><topic>Confined aquifers</topic><topic>Dewatering</topic><topic>Drawdown</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Environmental Science and Engineering</topic><topic>Geochemistry</topic><topic>Geology</topic><topic>Hydraulics</topic><topic>Hydrogeology</topic><topic>Hydrology</topic><topic>Hydrology/Water Resources</topic><topic>Original Article</topic><topic>Permeability</topic><topic>Pumping tests</topic><topic>River beds</topic><topic>Rivers</topic><topic>Terrestrial Pollution</topic><topic>Tunnels</topic><topic>Water conveyance</topic><topic>Water levels</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xu, Baotian</creatorcontrib><creatorcontrib>Yan, Changhong</creatorcontrib><creatorcontrib>Sun, Qian</creatorcontrib><creatorcontrib>Liu, Yunping</creatorcontrib><creatorcontrib>Hou, Jian</creatorcontrib><creatorcontrib>Liu, Shi</creatorcontrib><creatorcontrib>Che, Canhui</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Science Database</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>Environment Abstracts</collection><jtitle>Environmental earth sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xu, Baotian</au><au>Yan, Changhong</au><au>Sun, Qian</au><au>Liu, Yunping</au><au>Hou, Jian</au><au>Liu, Shi</au><au>Che, Canhui</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Field pumping experiments and numerical simulations of shield tunnel dewatering under the Yangtze River</atitle><jtitle>Environmental earth sciences</jtitle><stitle>Environ Earth Sci</stitle><date>2016-04-01</date><risdate>2016</risdate><volume>75</volume><issue>8</issue><spage>1</spage><pages>1-</pages><artnum>715</artnum><issn>1866-6280</issn><eissn>1866-6299</eissn><abstract>The water conveyance tunnel for the Changshu power plant is located under the riverbed of the Yangtze River. The tunnel passes through muddy silty clay (①) and silty clay (②). Because quicksand and water bursting occurred in the tunnel due to confined water and biogas in layers ② and ③, it can be concluded that the tunnel is intensely affected by the confined aquifer (layer ③). To obtain more accurate hydrogeological parameters of the aquifers, in situ pumping tests were carried out. The tests were divided into five stages and, during the test process, the flux and drawdown were monitored. Based on the measured data, the permeability coefficients of the confined aquifers were calculated by the formula and numerical methods. The calculated results indicate that the parameters derived from the two methods are very similar. The hydraulic connections of the confined aquifers were also inversed from the pumping tests. The dewatering schedule for tunnel recovery was simulated using ModFlow. Based on the numerical simulation, 21 wells, whose screens were installed in layer ③, were designed for the dewatering operation. During pumping, the water levels declined to the drawdown requirement. The results indicate that the dewatering approach is feasible for tunnel recovery and can provide solutions for similar projects.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s12665-016-5493-9</doi></addata></record> |
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| subjects | Aquifers Biogas Biogeosciences Clay Confined aquifers Dewatering Drawdown Earth and Environmental Science Earth Sciences Environmental Science and Engineering Geochemistry Geology Hydraulics Hydrogeology Hydrology Hydrology/Water Resources Original Article Permeability Pumping tests River beds Rivers Terrestrial Pollution Tunnels Water conveyance Water levels |
| title | Field pumping experiments and numerical simulations of shield tunnel dewatering under the Yangtze River |
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