Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on Soil Disturbance Caused by Shield Tunneling in Sandy Strata
Shield tunneling and construction in sandy soil have great safety risks, so it is necessary to study the soil disturbance caused by tunneling in sandy soil. However, the law of soil disturbance is still relatively vague, so this paper relies on the actual tunnel project, through high-density, close monitoring; The settlement law of soil around shield tunnel is studied and analyzed. The research shows that the settlement of soil disturbance is basically stable after the shield tail leaves the monitoring section about twice the length of the shield machine; During shield tunneling in sandy strata, the sand on the upper part of the tunnel is very easy to collapse, thus forming a “collapse arch”. The formation of this feature will be one of the reasons for the construction accidents of large diameter shield machines; The remarkable feature of soil disturbance around the tunnel in the water rich sand layer is that the maximum horizontal displacement of the measuring points at different locations occurs at the same depth, and does not develop from the tunnel center to the 45-φ/2 diffusion angle; The maximum horizontal deformation during tunnel construction is far less than the vertical deformation, so the horizontal displacement can be used to better analyze the actual impact of shield construction disturbance.
Study on Soil Disturbance Caused by Shield Tunneling in Sandy Strata
Shield tunneling and construction in sandy soil have great safety risks, so it is necessary to study the soil disturbance caused by tunneling in sandy soil. However, the law of soil disturbance is still relatively vague, so this paper relies on the actual tunnel project, through high-density, close monitoring; The settlement law of soil around shield tunnel is studied and analyzed. The research shows that the settlement of soil disturbance is basically stable after the shield tail leaves the monitoring section about twice the length of the shield machine; During shield tunneling in sandy strata, the sand on the upper part of the tunnel is very easy to collapse, thus forming a “collapse arch”. The formation of this feature will be one of the reasons for the construction accidents of large diameter shield machines; The remarkable feature of soil disturbance around the tunnel in the water rich sand layer is that the maximum horizontal displacement of the measuring points at different locations occurs at the same depth, and does not develop from the tunnel center to the 45-φ/2 diffusion angle; The maximum horizontal deformation during tunnel construction is far less than the vertical deformation, so the horizontal displacement can be used to better analyze the actual impact of shield construction disturbance.
Study on Soil Disturbance Caused by Shield Tunneling in Sandy Strata
Lecture Notes in Civil Engineering
Feng, Guangliang (Herausgeber:in) / Zou, Weiyu (Autor:in) / Luo, Shuyi (Autor:in) / Liu, Yingcheng (Autor:in) / Pan, Hong (Autor:in)
International Conference on Civil Engineering ; 2022 ; Nanchang, China
Proceedings of the 9th International Conference on Civil Engineering ; Kapitel: 21 ; 253-264
18.06.2023
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Impact of Shield Tunneling on Adjacent Pile Foundation in Sandy Cobble Strata
| SAGE Publications | 2013
Impact of Shield Tunneling on Adjacent Pile Foundation in Sandy Cobble Strata
| British Library Conference Proceedings | 2013
Study on Complex Strata Classification of Shield Tunneling
| British Library Conference Proceedings | 2014