Experimental Study on Deformation Failure Mechanism of Surrounding Rocks for the Deep-Buried Twin Tunnels in Inclined Layered Strata During the Excavation

Shen, Fuxin; Song, Youjian; Zhao, Wenchao; Wang, Jian; Zheng, Jian; Shao, Zhixin

doi:10.1007/s00603-022-03175-1

Cited by 13 publications

(2 citation statements)

References 29 publications

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“…Qu et al 25 proposed a machine learning approach for reliability assessment, and Nie et al 26 integrated geological methods for water-rich granite identification. Finally, Shen et al 27 explored deformation mechanisms in twin tunnels. Xiang et al 28 investigate shallow tunnel deformation and failure mechanisms, emphasizing the influence of surrounding material strengths and challenging the applicability of the Peck formula.…”

Section: Introductionmentioning

confidence: 99%

Innovative numerical modeling for predicting soil relaxation in the design of twin circular culverts

Shiau,

Nguyen,

Sams

et al. 2024

Sci Rep

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This study presents a finite difference model for analyzing ground stability and settlement of twin circular culverts in undrained clay. The model is verified through simulations of soil movement and relaxation around a tunnel-boring machine's shield. Stability numbers and ground settlement are evaluated across various culvert geometries and soil ratios and compared to rigorous solutions and previous models. The settlement data obtained is used to determine inflection point parameters for practical culvert design, considering dimensionless ratios. The findings highlight the importance of precise design methodologies that consider soil properties and geometry. The finite difference model proves to be a valuable tool in culvert design, providing accurate analysis of stability and settlement characteristics. The presented design figures and regression equations serve as practical tools for engineers in designing stable twin circular culverts in undrained clay. The study emphasizes the need to carefully consider soil properties and geometry for successful culvert design. In conclusion, the finite difference model offers insights into ground stability and settlement of twin circular culverts. The presented design figures and regression equations support engineers in making informed design decisions, ensuring the stability and long-term performance of culverts in undrained clay conditions.

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Section: Introductionmentioning

confidence: 99%

Innovative numerical modeling for predicting soil relaxation in the design of twin circular culverts

Shiau,

Nguyen,

Sams

et al. 2024

Sci Rep

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“…Numerous researchers have studied tunnels' deformation and mechanical properties in layered surrounding rock with high ground stress, mainly using model tests [10][11][12][13][14][15][16] and numerical simulations [17][18][19][20][21]. These methods are effective for investigating tunnels in layered surrounding rock because they have high repeatability, are low cost, and are less time-consuming [22].…”

Section: Introductionmentioning

confidence: 99%

A Field Study to Measure the Surrounding Stress of Rock and Supporting Structure of a Steep Tunnel with a Combination of Hard and Soft Rock Layers under Plate Compression

Zhang,

Hu,

et al. 2024

Buildings

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Tunnels excavated in a combination of hard and soft rock strata with high ground stress are prone to large deformations, collapse, and other disasters. The Yongfeng Tunnel, a reconstruction and expansion of the G544 line, suffered severe high ground stress from plate compression. This paper studied the surrounding rock pressure and supporting structure stress characteristics of tunnels with a combination of hard and soft rock strata with high ground stress by using earth pressure cells, surface strain gauges, and embedded strain gauges to test all stress related to the surrounding rock, primary support, and secondary lining. It was found that the contact pressure (P1) between the initial support and the surrounding rock and the contact pressure (P2) between the initial support of the leading tunnel were distributed in the direction of vertical stratification, while the contact pressures (P1 and P2) of the lagging tunnel were different due to the excavation unloading of the leading tunnel. The maximum stress positions of the initial support of the leading tunnel and the lagging tunnel were located in the left arch waist and the vault, respectively. However, the maximum stress position of the secondary lining was generally located on the side wall. The research results presented herein can guide future tunnel construction projects.

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Instability mechanism of layered surrounding rock tunnels affected by layer thickness under dynamic and static loads

Yao,

Jiang,

Yao

et al. 2024

Alexandria Engineering Journal

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Experimental Study on Deformation Failure Mechanism of Surrounding Rocks for the Deep-Buried Twin Tunnels in Inclined Layered Strata During the Excavation

Cited by 13 publications

References 29 publications

Innovative numerical modeling for predicting soil relaxation in the design of twin circular culverts

Innovative numerical modeling for predicting soil relaxation in the design of twin circular culverts

A Field Study to Measure the Surrounding Stress of Rock and Supporting Structure of a Steep Tunnel with a Combination of Hard and Soft Rock Layers under Plate Compression

Instability mechanism of layered surrounding rock tunnels affected by layer thickness under dynamic and static loads

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