Surface control techniques for tunnels in karst areas under airport taxiways

YAN, Zhijian; Zhang, Junru; Dai, Yi; Yan, Bo; Jiang, Xiaorui

doi:10.1680/jgeen.22.00014

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…The analysis of surface subsidence caused by some tunnel excavations can be analyzed using numerical methods 33 . Based on an underground pipeline project beneath a metro station, four construction simulation models were established using finite difference software FLAC 3D .…”

Section: Numerical Simulationmentioning

confidence: 99%

Modified stochastic medium prediction model for the deformation response of concealed underground stations under existing pipelines

Zhang

Tong

et al. 2023

Sci Rep

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The underground pipeline network in the city is so intertwined that the concealed excavation of a metro station inevitably leads to a series of underground pipelines, causing settlement deformation and further risk of leakage. The existing theoretical methods for analysing settlement deformation are mostly for circular chambers, whereas metro stations have a nearly square cross-sectional form and different construction methods are very different, which have a greater impact on the deformation of the overlying pipelines. In this paper, based on the random medium theory and Peck's formula, the improved random medium model for predicting ground deformation is modified, the correction coefficients λ and η for the influence of different construction methods are proposed, the prediction model of underground pipeline deformation under different construction methods is obtained, and the numerical models of four work methods commonly used in urban tunnel construction: pillar hole method, side hole method, middle hole method and Pile-Beam-Arch (PBA) method are constructed through simulation, and the mathematical analysis software was used to fit the results to the model and obtain the range of correction coefficients λ and η for each of the four methods, and the accuracy and applicability of the theoretical model was verified by combining with actual engineering cases. The influence on the overlying pipes is in descending order: side hole method, pillar hole method, middle hole method and PBA method. The theoretical model provided in this paper for predicting the deformation of pipes in any overlying strata of the tunnel is well suited to the actual project and has a high degree of correlation with the measured results.

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Section: Numerical Simulationmentioning

confidence: 99%

Modified stochastic medium prediction model for the deformation response of concealed underground stations under existing pipelines

Zhang

Tong

et al. 2023

Sci Rep

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Editorial: Geo-environmental loads acting on tunnels

Castellanza

2023

Proceedings of the Institution of Civil Engineers - Geotechnica

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Treatment measures for the creep–slip phase of landslides induced by twin tunnels

Zhang,

Ma,

et al. 2023

Proceedings of the Institution of Civil Engineers - Geotechnica

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Tunnel excavation in geologically challenging areas can lead to slope instability and consequent landslides, which pose a serious threat to the integrity of the tunnel lining. To address this issue, a study was conducted to investigate the stability of the tunnel-landslide system using the finite difference method (FDM) based on the Hanshankou Tunnel of the Shaoguan-Xinfeng Expressway. A plane strain model was used to examine the effect of various treatment measures on the system, and the strength reduction (incremental) method was employed to determine the range of initial slope safety factors applicable to different treatment measures, with the maximum shear strain increment serving as the criterion. The ‘anti-slip pile + anchor frame beam’ reinforcement system was found to be the most effective solution, reducing daily deformation by 60.1% after implementation. The results indicated that the pile-anchor reinforcement system can significantly mitigate landslide creep, and the corresponding treatment measures can be categorized based on the critical slope safety factor under different conditions.

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Surface control techniques for tunnels in karst areas under airport taxiways

Cited by 3 publications

References 11 publications

Modified stochastic medium prediction model for the deformation response of concealed underground stations under existing pipelines

Modified stochastic medium prediction model for the deformation response of concealed underground stations under existing pipelines

Editorial: Geo-environmental loads acting on tunnels

Treatment measures for the creep–slip phase of landslides induced by twin tunnels

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