Numerical stability analysis of superhigh-fill subgrade underlying acute inclined mined-out area with underground coal fire

Wei-xing, Bao; Wang, Haibo; Lai, Hongpeng; Huang, Yong; Liang, Bangwei; Ma, Zhiwei

doi:10.1007/s12665-020-09346-z

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…3 Xinjiang Transportation Planning Survey and Design Institute Co., Ltd, Urumqi 830006, China. 4 CCCC Second Highway Consultants Co., Ltd., Wuhan 430056, China. * email: zlu@whrsm.ac.cn; hfutliujie@163.com…”

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confidence: 99%

Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds

Zhao

Lü

Ji³

et al. 2023

Sci Rep

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This paper presents a comprehensive study on the numerical and parametric study of geocell-reinforced cohesive soil beds, focusing on different infill materials. The numerical calculations were validated against model test results using FLAC3D software. Subsequently, the verified model was expanded to the geocell-reinforced cohesive soil beds. Six cases were simulated to investigate the reinforced performance, including pressure-settlement responses, bearing capacity improvement factor, settlement reduction percentage, and surface deformation. The numerical findings emphasize that the significance of superior geocell reinforcement should not overshadow the consideration of soil infill’s mechanical properties. In the case of cohesive soil as the infill material, the poor improvement in geocell-reinforced performance may be attributed to its low modulus and cohesion. Parametric studies suggest that geocells significantly impact reinforced performance when the infill material consists of foundation soil with a higher modulus and lower cohesion. Further, according to this numerical study, cohesionless soil with a modulus of 20 MPa and friction of 40° is the optimum infill soil in pockets to reinforce cohesive soil beds.

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Section: List Of Symbolsmentioning

confidence: 99%

Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds

Zhao

Lü

Ji³

et al. 2023

Sci Rep

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“…Consequently, the settlement prediction and stability evaluation of mined-out areas are critical in assessing the likely damage potential to the environment and surface structures. With the need for economic development and highway network construction in many regions, highways traversing all kinds of mined-out areas are inevitable (Bao et al, 2021). The highway is a kind of long strip of civil engineering.…”

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confidence: 99%

Subsidence Characteristics Study on the Highway and Substrata Overlying Acute Inclined Shallow Mined-out Area Under Different Mining Heights and Mining Angles

Bao¹,

H²,

Lai³

et al. 2021

Preprint

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Based on an actual highway project traversing an acute inclined shallow mined-out area in Urumqi, China, a scale physical model experiment and numerical simulation method were adopted to study the stability and settlement mechanism of the highway subgrade and substrata overlying an acute inclined mined-out area under different mining heights and mining angles. Plastic pneumatic capsules with different shapes were embedded in similar strata made from clay, fine sand, and Vaseline to simulate the mined-out cavity. The capsule was removed to simulate the process of mining, and five cases with different mining heights and angles were studied. According to similarity theory, a physical model was established with a geometric similarity coefficient of 50 of the actual prototype, whereas the numerical model adopted the full-scale value. The physical model experiments and numerical simulations show that the settlement of the subgrade and substrata overlying the mined-out area is directly proportional to the mining height but inversely proportional to the mining angle. According to the settlement contour obtained by numerical simulations, which were in accordance with the physical model experiment results, two parameters, the free slip volume and the free surface, were defined to assess the stability of the subgrade and substrata overlying the mined-out area. The free slip volume and free surface calculation results demonstrate a strong relationship between the settlement and free slip volume and free surface. Therefore, the values of free slip volume and free surface could be reliable reference parameters to evaluate the stability of the subgrade and substrata overlying mined-out areas.

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Migration imaging processing of subgrade cavity GPR detection based on TUFK method

Zhang,

Deng

et al. 2024

Environ Earth Sci

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Numerical stability analysis of superhigh-fill subgrade underlying acute inclined mined-out area with underground coal fire

Cited by 6 publications

References 23 publications

Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds

Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds

Subsidence Characteristics Study on the Highway and Substrata Overlying Acute Inclined Shallow Mined-out Area Under Different Mining Heights and Mining Angles

Migration imaging processing of subgrade cavity GPR detection based on TUFK method

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