Stability analysis on roof of rock foundation with Karst cave and karst cave &amp;#x2014; surrounding rock

Chen, Dongqin; Tang, Zhonghua

doi:10.1109/iceceng.2011.6057296

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Te above studies show that most of the studies have focused on cavern solutions, and relatively few studies have been conducted on the construction response characteristics of huge cavern backflling [40][41][42][43][44][45][46][47][48][49][50][51]. Although Chen et al [52] studied the stress distribution and deformation of surrounding rock in their numerical simulation of a large karst cave in front of the Huaguoshan Tunnel. Li et al [53] used the fnite diference method to conduct three-dimensional simulation calculations on the existence of a karst cave and the stress distribution, displacement characteristics, and plastic zone size of surrounding rock before and after grouting flling and reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Study on Construction Response Characteristics of Large Cross-Section Tunnel Crossing Huge Karst Cave Backfill

Chen

Cai

Zhang

et al. 2023

Shock and Vibration

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The existence of giant karst cave can cause collapse and water inrush hazards during the excavation of the karst tunnel, causing serious economic losses. In this paper, based on the FEA software MIDAS, a numerical simulation model for the backfilling of a large karst cave through a large cross-section tunnel was established. The distribution characteristics and change rules of the displacement field, stress field, horizontal support stress, and plastic zone of the tunnel surrounding rock and backfill were explored. The first stage of tunnel excavation leads to a sharp increase in the displacement of the tunnel’s surrounding rock and the deterioration of the plastic zone, which should be strengthened and monitored. The tunnel arch, waist, and wall footing areas were prone to stress concentration. The two layers of horizontal support force show a certain regularity, showing a sharp increase and a gradually smooth growth trend. Meanwhile, the site monitoring results for arch settlement and horizontal convergence of the mega cavern tunnel were analyzed. The results show that the numerical calculation results were in good agreement with the values of site monitoring data. The average errors of final crown settlement and horizontal convergence were 8.6% and 15.9%, respectively, which verified the correctness of the numerical modeling method. This project can provide reliable experience for the construction of similar large cavern tunnels.

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Section: Introductionmentioning

confidence: 99%

Study on Construction Response Characteristics of Large Cross-Section Tunnel Crossing Huge Karst Cave Backfill

Chen

Cai

Zhang

et al. 2023

Shock and Vibration

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“…It becomes one of the main methods after many years of efforts. Ye Cheng [2] et al used this method by modifying the value of c and f to calculate. However Shangyi Zhao [3] repeated trial with changing shear factors as parameters till numerical non-convergence.…”

Section: Introductionmentioning

confidence: 99%

Basic Analysis of Homogenous Slope Stability by Finite Element Method Based on Plaxis

Li¹,

Shi²,

Yan³

2012

AMR

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This article analyze the slope stability by strength reduction method named Phi-c which supplied by FE software PLAXIS. The reduction factor is suggest to be the safety factor of the slope at the moment when the slope reaches instability, the numerical non-convergence occurs simultaneously. The position of sliding surface and dynamic simulation of instability can be obtain as well. This article has compared the results calculated by other methods Bishop and ABAQUS with difference between 2%-3% which attest to its accuracy and practicability in engineering.

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Stability analysis on roof of rock foundation with Karst cave and karst cave — surrounding rock

Cited by 2 publications

References 2 publications

Study on Construction Response Characteristics of Large Cross-Section Tunnel Crossing Huge Karst Cave Backfill

Study on Construction Response Characteristics of Large Cross-Section Tunnel Crossing Huge Karst Cave Backfill

Basic Analysis of Homogenous Slope Stability by Finite Element Method Based on Plaxis

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