Prediction of Ground Settlement Due to Excavation of a Quasi-Rectangular Shield Tunnel Based on Stochastic Medium Theory

Wei, Gang; Zhang, Xinhai; Yin-Feng, Xu; Wang, Zhe

doi:10.1007/s10706-019-00856-7

Cited by 22 publications

(8 citation statements)

References 24 publications

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“…The two end sides of the model tunnel were sealed with a transparent membrane, which could prevent the clay or water from entering the inside of the tunnel during the process of the test. According to the findings of Wei et al (2010) [40], the common volume loss rate during tunneling in China varies between 0.5% and 3%. To facilitate observation of the soil movement and the deformation of the models, the volume loss in this study was selected to be 2%.…”

Section: Test Schemes and Monitoring Equipmentmentioning

confidence: 99%

Experimental Study on the Soil–Structure Responses Induced by Tunnelling in Limited Space

Guo

Liu

2023

Applied Sciences

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As the economy develops rapidly, newly built tunnels in congested urban areas are becoming more and more common. Based on similarity theory, this study conducted a laboratory model test to investigate the soil–structure responses induced by the construction of a new tunnel in limited space which was formed by the existing underground infrastructures. The soil movement, convergence of the tunnel and distribution of the soil stress were explored. The test results revealed that the limited space could have a significant shielding effect on the soil movement. The maximum ground subsidence and the range of ground settlement induced by the construction of the tunnel in limited space were 60% and 40%, respectively, smaller than those induced by the construction of a tunnel at a “greenfield” site. The deformation of the tunnel was also restrained distinctly. Moreover, a soil settlement trough appeared below the bottom slab of the underground structure. The findings can shed some light on the surrounding responses induced by tunnelling in limited space in soft clay and can offer the valuable guidance for the similar projects.

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Section: Test Schemes and Monitoring Equipmentmentioning

confidence: 99%

Experimental Study on the Soil–Structure Responses Induced by Tunnelling in Limited Space

Guo

Liu

2023

Applied Sciences

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“…For the ground settlement caused by shield or pipe jacking engineering, the theoretical analysis method [3,4], empirical formula method [5][6][7][8], and numerical simulation method [9,10] are usually used to study it. In terms of shield ground settlement, Fang et al [11] proved the influence of tunnel depth and ground loss rate on longitudinal ground settlement caused by shield construction through a series of model tests.…”

Section: Introductionmentioning

confidence: 99%

Differential Analysis and Prediction Optimization of Ground Surface Settlement Induced by Quasi‐Rectangular Shield and Pipe Jacking Tunnelling

et al. 2022

Advances in Civil Engineering

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The shield method and pipe jacking method will impact the ground surface and surrounding settlement during tunnel construction. Due to their different tunnelling principles and their cross-section characteristics, the impact on the stratum is often different. To study the differences between the two construction methods on ground surface settlement, numerical simulations, Peck empirical formulas, and field measurement data were used for analysis and comparison in this work. Two correction coefficients α and λ are introduced for correction on the basis of the DOT Peck formula, and the analysis of sensitivity factors for the ground settlement for the two construction methods is carried out. The numerical simulation results show that the ground settlement induced by pipe jacking construction is smaller than that of the shield, and this simulation result is confirmed by the field measurement result. When λ is selected from 0.85 to 0.91 and α from 1 to 1.1 for the shield project, 1.2 to 1.4, and 1.4 to 1.6 for the pipe jacking project, the modified formula can better predict the ground surface settlement. According to the sensitivity factor analysis, grouting pressure and elastic modulus of grout material exert a more significant influence on pipe jacking construction. The retreat of the pipe section caused by the tunnelling pressure difference will lead to 0 mm ∼ 1.93 mm fluctuation on the ground surface.

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“…e theoretical analysis of the additional stress field induced by the quasirectangular shield tunnel is mainly based on the Mindlin solution to establish the computational expressions for the additional thrust on the front side of the cutter, the frictional resistance between the shield shell and the soil, and the grouting pressure during the excavation of the shield tunnel in homogeneous stratum [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…e research on ground settlement induced by quasirectangle shield tunneling is mainly based on Peck's formula and stochastic medium theory to further deduces the formula for calculating and predicting ground settlement [6][7][8][9]. Existing literature on the environmental impact of tunnel construction has mostly focused on the analysis and prediction of soil deformation.…”

Section: Introductionmentioning

confidence: 99%

Study on Environmental Effects Induced by Quasirectangle Shield Tunnelling with Analytical Stiffness Matrix

Miao

Kou

et al. 2022

Advances in Civil Engineering

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During the quasirectangle shield tunnelling, the soil around the tunnel is inevitably disturbed which results in different degrees of additional stresses and displacement of the soil. In this paper, the environmental effects caused by the construction of quasirectangle shield are analyzed by the analytical stiffness matrix method, focusing on the law of the additional stress field and the deformation of the multilayered soil induced by the construction of a quasirectangle shield. The results show that the additional stresses field has localized characteristics around the quasirectangle shield. The further away from the excavation face, the smaller the stress is. Also, shell friction and synchronous grouting pressure have a significantly greater influence on the additional stress field. Finally, the horizontal settlement groove of the quasirectangle shield is roughly symmetrical and parabolic along the tunnel axis, with a groove width range of about 20m. Synchronous grouting pressure has a greater effect on longitudinal ground deformation.

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Prediction of Ground Settlement Due to Excavation of a Quasi-Rectangular Shield Tunnel Based on Stochastic Medium Theory

Cited by 22 publications

References 24 publications

Experimental Study on the Soil–Structure Responses Induced by Tunnelling in Limited Space

Experimental Study on the Soil–Structure Responses Induced by Tunnelling in Limited Space

Differential Analysis and Prediction Optimization of Ground Surface Settlement Induced by Quasi‐Rectangular Shield and Pipe Jacking Tunnelling

Study on Environmental Effects Induced by Quasirectangle Shield Tunnelling with Analytical Stiffness Matrix

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