Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis
This paper analyzed the earth pressure, pore pressure, and surface settlement of the Luoyang urban rail transit tunnel in a sandy gravel stratum (Henan Province, China) under different burial depths by using field measurement methods. The results showed that the earth pressure as well as pore pressu...
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Frontiers Media S.A.
2021
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oai:doaj.org-article:fc69b2acfc0c4e9089a868fcb363030f2021-11-30T10:01:45ZDisturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis2296-646310.3389/feart.2021.782927https://doaj.org/article/fc69b2acfc0c4e9089a868fcb363030f2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.782927/fullhttps://doaj.org/toc/2296-6463This paper analyzed the earth pressure, pore pressure, and surface settlement of the Luoyang urban rail transit tunnel in a sandy gravel stratum (Henan Province, China) under different burial depths by using field measurement methods. The results showed that the earth pressure as well as pore pressure of the soil layer above the working surface increased sharply and reached their maximum values when the cutter head of the shield gradually crossed the working surface. During the completion of synchronous grouting, the earth pressure and pore pressure increased slightly; when shield tunneling passed through the working surface, the earth pressure is smaller than the original earth pressure due to the unloading effect. The surface settlement curve above the tunnel took on a “V” shape after the completion of the left-side tunnel excavation, conforming to the normal distribution pattern. The surface settlement curve above the two tunnels took on a “W” shape after the completion of the right-side tunnel excavation, which is in good agreement with the proposed theoretical calculations. The findings of this study can help for better understanding the control of safety risk during shield construction.Nie QingkeSun GuangGao SiyuanLiu HongtaoZhou LichaoHou JianpengFrontiers Media S.A.articleshield tunnelsandy gravelpore pressureearth pressuresurface settlementScienceQENFrontiers in Earth Science, Vol 9 (2021) |
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shield tunnel sandy gravel pore pressure earth pressure surface settlement Science Q |
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shield tunnel sandy gravel pore pressure earth pressure surface settlement Science Q Nie Qingke Sun Guang Gao Siyuan Liu Hongtao Zhou Lichao Hou Jianpeng Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis |
| description |
This paper analyzed the earth pressure, pore pressure, and surface settlement of the Luoyang urban rail transit tunnel in a sandy gravel stratum (Henan Province, China) under different burial depths by using field measurement methods. The results showed that the earth pressure as well as pore pressure of the soil layer above the working surface increased sharply and reached their maximum values when the cutter head of the shield gradually crossed the working surface. During the completion of synchronous grouting, the earth pressure and pore pressure increased slightly; when shield tunneling passed through the working surface, the earth pressure is smaller than the original earth pressure due to the unloading effect. The surface settlement curve above the tunnel took on a “V” shape after the completion of the left-side tunnel excavation, conforming to the normal distribution pattern. The surface settlement curve above the two tunnels took on a “W” shape after the completion of the right-side tunnel excavation, which is in good agreement with the proposed theoretical calculations. The findings of this study can help for better understanding the control of safety risk during shield construction. |
| format |
article |
| author |
Nie Qingke Sun Guang Gao Siyuan Liu Hongtao Zhou Lichao Hou Jianpeng |
| author_facet |
Nie Qingke Sun Guang Gao Siyuan Liu Hongtao Zhou Lichao Hou Jianpeng |
| author_sort |
Nie Qingke |
| title |
Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis |
| title_short |
Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis |
| title_full |
Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis |
| title_fullStr |
Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis |
| title_full_unstemmed |
Disturbance Process of Sandy Gravel Stratum Caused by Shield Tunneling and Ground Settlement Analysis |
| title_sort |
disturbance process of sandy gravel stratum caused by shield tunneling and ground settlement analysis |
| publisher |
Frontiers Media S.A. |
| publishDate |
2021 |
| url |
https://doaj.org/article/fc69b2acfc0c4e9089a868fcb363030f |
| work_keys_str_mv |
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| _version_ |
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