Characteristics and Genesis of Acid Drainage Contamination from a Rock Tunneling Project Site

Li, Yanyun; Luo, Zejiao; Qi, Shihua

doi:10.1007/s12583-021-1551-7

J. Earth Sci.

2024

DOI: 10.1007/s12583-021-1551-7

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Characteristics and Genesis of Acid Drainage Contamination from a Rock Tunneling Project Site

Yanyun Li,

Zejiao Luo,

Shihua Qi

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Study on the Stress and Deformation of Surrounding Rock and Support Structure of Super Large Section Tunnels Based on Different Excavation Methods

Sun,

Xu,

et al. 2024

Applied Sciences

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Due to the complexity of construction sequence and the extended duration required to construct super large section tunnels, the selection of excavation method critically influences the stability of the surrounding rock and support structures. In this work, the Xiaoyuan Tunnel project in Jiangxi Province serves as the research background for employing ABAQUS software to simulate the variations in displacement and stress within the rock and support structures under three different excavation methods. The simulated results are subsequently compared and verified against monitoring data. The findings indicate that the three-benching seven-step method releases more stress (maximum principal stress value reaches 0.621 MPa) from the surrounding rock and support structures than the other methods, resulting in stress concentrations. Therefore, it is of vital significance to complete the initial support in time and seal the tunnel opening quickly. The maximum principal stress values caused by three excavation methods all appear at the arch foot position, highlighting the need for prompt reinforcement of stability support there. Compared to the CRD method and the three-benching seven-step method, the tunnel vault’s settlement value caused by the double-side drift method is reduced by 14% and 19%, respectively. Furthermore, the largest disturbance of the surrounding rock occurs under the CRD method, while the double-side drift method minimizes such disturbances, making it the preferred choice for the construction of super large section tunnels. These insights are invaluable for guiding the selection and optimization of construction methods for such tunnels.

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Study on the Stress and Deformation of Surrounding Rock and Support Structure of Super Large Section Tunnels Based on Different Excavation Methods

Sun,

Xu,

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

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Characteristics and Genesis of Acid Drainage Contamination from a Rock Tunneling Project Site

Cited by 1 publication

References 29 publications

Study on the Stress and Deformation of Surrounding Rock and Support Structure of Super Large Section Tunnels Based on Different Excavation Methods

Study on the Stress and Deformation of Surrounding Rock and Support Structure of Super Large Section Tunnels Based on Different Excavation Methods

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