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A platform for research: civil engineering, architecture and urbanism
Study on Disturbance Characteristics of Surrounding Rock During Construction of Shallow Buried Bias Loess Tunnel with Small Clear Distance
https://orcid.org/http://orcid.org/0000-0001-6729-7927
https://orcid.org/http://orcid.org/0009-0000-1799-8768
To study the disturbance characteristics of surrounding rock during the construction of a shallow buried bias loess tunnel with a small clear distance, the finite element analysis method was used. Firstly, the surrounding rock stress laws in the loess area are determined by combining the surrounding rock pressure analysis method of shallow buried bias tunnel with small clear distance. Then, considering the construction conditions of different buried depths and net distances, the disturbance characteristics of the surrounding rock during the excavation of the shallow buried bias loess tunnel with small clear distance are studied, and the stress changes, plastic zone, and displacement changes of the surrounding rock are analyzed. It is found that the pressure distribution and bias of the surrounding rock in the loess surrounding rock are more likely to cause the stress concentration phenomenon of the surrounding rock during the excavation of the tunnel with small clear distance. The buried depth of the tunnel is the main factor affecting the stress change of the surrounding rock of loess. Different clear distances will make the plastic change of the loess surrounding rock of tunnel with small clear distance more complicated. When the tunnel buried depth is too large, the vertical displacement of the vault and arch shoulder is reduced due to the self-stability characteristics of the surrounding rock. The horizontal displacement of the surrounding rock is controlled by two factors: the buried depth and the clear distance of the tunnels.
Study on Disturbance Characteristics of Surrounding Rock During Construction of Shallow Buried Bias Loess Tunnel with Small Clear Distance
https://orcid.org/http://orcid.org/0000-0001-6729-7927
https://orcid.org/http://orcid.org/0009-0000-1799-8768
To study the disturbance characteristics of surrounding rock during the construction of a shallow buried bias loess tunnel with a small clear distance, the finite element analysis method was used. Firstly, the surrounding rock stress laws in the loess area are determined by combining the surrounding rock pressure analysis method of shallow buried bias tunnel with small clear distance. Then, considering the construction conditions of different buried depths and net distances, the disturbance characteristics of the surrounding rock during the excavation of the shallow buried bias loess tunnel with small clear distance are studied, and the stress changes, plastic zone, and displacement changes of the surrounding rock are analyzed. It is found that the pressure distribution and bias of the surrounding rock in the loess surrounding rock are more likely to cause the stress concentration phenomenon of the surrounding rock during the excavation of the tunnel with small clear distance. The buried depth of the tunnel is the main factor affecting the stress change of the surrounding rock of loess. Different clear distances will make the plastic change of the loess surrounding rock of tunnel with small clear distance more complicated. When the tunnel buried depth is too large, the vertical displacement of the vault and arch shoulder is reduced due to the self-stability characteristics of the surrounding rock. The horizontal displacement of the surrounding rock is controlled by two factors: the buried depth and the clear distance of the tunnels.
Study on Disturbance Characteristics of Surrounding Rock During Construction of Shallow Buried Bias Loess Tunnel with Small Clear Distance
https://orcid.org/http://orcid.org/0000-0001-6729-7927
https://orcid.org/http://orcid.org/0009-0000-1799-8768
To study the disturbance characteristics of surrounding rock during the construction of a shallow buried bias loess tunnel with a small clear distance, the finite element analysis method was used. Firstly, the surrounding rock stress laws in the loess area are determined by combining the surrounding rock pressure analysis method of shallow buried bias tunnel with small clear distance. Then, considering the construction conditions of different buried depths and net distances, the disturbance characteristics of the surrounding rock during the excavation of the shallow buried bias loess tunnel with small clear distance are studied, and the stress changes, plastic zone, and displacement changes of the surrounding rock are analyzed. It is found that the pressure distribution and bias of the surrounding rock in the loess surrounding rock are more likely to cause the stress concentration phenomenon of the surrounding rock during the excavation of the tunnel with small clear distance. The buried depth of the tunnel is the main factor affecting the stress change of the surrounding rock of loess. Different clear distances will make the plastic change of the loess surrounding rock of tunnel with small clear distance more complicated. When the tunnel buried depth is too large, the vertical displacement of the vault and arch shoulder is reduced due to the self-stability characteristics of the surrounding rock. The horizontal displacement of the surrounding rock is controlled by two factors: the buried depth and the clear distance of the tunnels.
Study on Disturbance Characteristics of Surrounding Rock During Construction of Shallow Buried Bias Loess Tunnel with Small Clear Distance
Indian Geotech J
Cheng, Xuansheng (author) / Liu, Yu (author) / Liu, Gongning (author) / Bu, Yuyue (author)
Indian Geotechnical Journal ; 54 ; 2421-2442
2024-12-01
22 pages
Article (Journal)
Electronic Resource
English
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