Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment
The construction of urban cross-river tunnels usually requires passing under river embankments, which inevitably disturbs the embankment substratum and causes ground deformation. Previous engineering cases have shown that embankment settlement is greater than ordinary surface settlement and that une...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8875800 |
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| author | Yu Liang Xiangyu Chen Junsheng Yang Linchong Huang |
| author_facet | Yu Liang Xiangyu Chen Junsheng Yang Linchong Huang |
| author_sort | Yu Liang |
| collection | DOAJ |
| description | The construction of urban cross-river tunnels usually requires passing under river embankments, which inevitably disturbs the embankment substratum and causes ground deformation. Previous engineering cases have shown that embankment settlement is greater than ordinary surface settlement and that uneven settlement results in cracks of in the embankment, reducing the embankment stability. Based on a cross-river tunnel project in China, the construction risks caused by the additional stress on the embankment substratum, asymmetrical embankment load, and shield tunneling in saturated fine sand are analyzed during a large-diameter slurry shield tunneling below an urban river embankment diagonally. Additionally, relevant risk control measures, such as slurry pressure, jacking thrust setting, and driving velocity in the saturated fine sand stratum, are evaluated. The results show that during shield tunneling under a diagonal urban river embankment, the additional stress and asymmetrical load effects should be considered, and the shield slurry pressure and jacking thrust should be adjusted according to the distance between the cutter head and the embankment. Furthermore, based on settlement monitoring data, the driving velocity of the shield should be reasonably adjusted in a timely manner to avoid disturbing the fine sand stratum below the embankment. |
| format | Article |
| id | doaj-art-91b96387cecf47cf80578fbd611be2c4 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-91b96387cecf47cf80578fbd611be2c42025-02-03T01:04:09ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88758008875800Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River EmbankmentYu Liang0Xiangyu Chen1Junsheng Yang2Linchong Huang3School of Aeronautics and Astronautics, Sun Yat-Sen University, Shenzhen, Guangdong 518000, ChinaFoshan Rail Transit Design and Research Institute Co. Ltd., Foshan, Guangdong 528000, ChinaSchool of Civil Engineering, Central South University, Changsha, Hunan 410000, ChinaSchool of Aeronautics and Astronautics, Sun Yat-Sen University, Shenzhen, Guangdong 518000, ChinaThe construction of urban cross-river tunnels usually requires passing under river embankments, which inevitably disturbs the embankment substratum and causes ground deformation. Previous engineering cases have shown that embankment settlement is greater than ordinary surface settlement and that uneven settlement results in cracks of in the embankment, reducing the embankment stability. Based on a cross-river tunnel project in China, the construction risks caused by the additional stress on the embankment substratum, asymmetrical embankment load, and shield tunneling in saturated fine sand are analyzed during a large-diameter slurry shield tunneling below an urban river embankment diagonally. Additionally, relevant risk control measures, such as slurry pressure, jacking thrust setting, and driving velocity in the saturated fine sand stratum, are evaluated. The results show that during shield tunneling under a diagonal urban river embankment, the additional stress and asymmetrical load effects should be considered, and the shield slurry pressure and jacking thrust should be adjusted according to the distance between the cutter head and the embankment. Furthermore, based on settlement monitoring data, the driving velocity of the shield should be reasonably adjusted in a timely manner to avoid disturbing the fine sand stratum below the embankment.http://dx.doi.org/10.1155/2020/8875800 |
| spellingShingle | Yu Liang Xiangyu Chen Junsheng Yang Linchong Huang Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment Advances in Civil Engineering |
| title | Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment |
| title_full | Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment |
| title_fullStr | Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment |
| title_full_unstemmed | Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment |
| title_short | Risk Analysis and Control Measures for Slurry Shield Tunneling Diagonally under an Urban River Embankment |
| title_sort | risk analysis and control measures for slurry shield tunneling diagonally under an urban river embankment |
| url | http://dx.doi.org/10.1155/2020/8875800 |
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