The Effect of Overlying Strata on the Distribution of Ground Movements Induced By Tunnelling In Clay

Hagiwara, Toshiyuki; Grant, R.J.; Calvello, Michele; Taylor, R.N.

doi:10.3208/sandf.39.3_63

Cited by 46 publications

(10 citation statements)

References 4 publications

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“…One of the early 2D plane-strain techniques used to simulate the effect of tunnel volume loss in centrifuge tests involved decreasing the internal pressure of a tunnel-shaped airbag (Atkinson et al, 1975;Potts, 1976;Hagiwara et al, 1999). A limitation of the pressurised airbag technique is that the compressibility of air makes it difficult to assess the magnitude of tunnel volume loss V l,t (i.e.…”

mentioning

confidence: 99%

Centrifuge modelling of tunnelling induced ground displacements: pressure and displacement control tunnels

Song

Marshall

2020

Tunnelling and Underground Space Technology

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mentioning

confidence: 99%

Centrifuge modelling of tunnelling induced ground displacements: pressure and displacement control tunnels

Song

Marshall

2020

Tunnelling and Underground Space Technology

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“…Generally speaking, this convergence pattern around the tunnel boundary has been ideally assumed to be uniform in the analytical solutions as shown for Pattern one in Figure . However, the area close to tunnel invert experienced very little movement compared with the crown was observed from centrifuge model tests by Hagiwara et al and field measurements by Deane and Bassett . Furthermore, Loganathan and Poulos and Park reported that such non‐uniform convergence profiles can provide more realistic predictions of tunneling‐induced ground displacements, which are shown in Figure for other three non‐convergence patterns.…”

Section: Displacement Controlled Coupling Numerical Methodsmentioning

confidence: 77%

Deformation analysis of tunnel excavation below existing pipelines in multi‐layered soils based on displacement controlled coupling numerical method

Zhang

Huang

Zhang

2012

Num Anal Meth Geomechanics

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SUMMARY The effect of tunneling on surrounding environments, especially on existing buried pipelines is a problem that engineers designing and practicing in urban geotechnical environments encounter more frequently than in the past. However, previous studies are usually based on the assumption that the soil is homogeneous. How to reflect soil stratification is the main focus for the problem of tunneling in multi‐layered soils. A displacement controlled coupling numerical method is presented for the displacement analysis of tunnel excavation below existing pipelines in multi‐layered soils. On the basis of the layered soil model, to consider the soil nonhomogeneous characteristic, the finite element method and boundary element method are coupled to simulate the deformation of existing pipelines induced by tunneling. The solutions indicate that good agreements are obtained between the proposed coupling numerical method and the commercial software. The accuracy of the proposed numerical method is better than the two stages method based on the existing closed‐form solutions. Moreover, the results discussed in this paper show that the error obtained by the previous method of weighted average on the basis of homogeneous half space converted from layered soils is not negligible for the obvious difference of elastic parameters among successive layers. Copyright © 2012 John Wiley & Sons, Ltd.

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“…Studies have shown that the settlement trough is much wider and shallower when tunnelling in clayey soils than that in sandy soils [46]. e difference is mainly caused by the deformation stiffness between different soil types on a macroscale [49].…”

Section: Ground Movement Prediction Of Composite Multilayeredmentioning

confidence: 98%

Movements and Its In‐Process Control of Ground and Built Structures due to Tunnelling in Urban Areas

Zhang

Cao

Fei

et al. 2022

Advances in Civil Engineering

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Tunnelling-induced environmental responses including ground movements and deformation of the environmental structures are the two prominent issues needed to be carefully disposed in urban areas. This paper tries to develop a theoretical framework to evaluate and control the environmental deformation to avoid two disasters including ground collapse and structural failure. According to the mechanical responses of the ground due to tunnelling, the urban ground in China can be roughly divided into three types including composite multilayered ground, highly water-bearing ground, and mixed rock ground. The displacements of ground and environmental structures due to tunnelling in multilayered ground are emphatically discussed in view of its largest proportion distribution. The cumulative and mutational characteristics of the displacements are considered, which can be the main basis for distinguishing the occurrence of two types of disasters. Based on the development of the displacements, the three-stage evolution model of disaster is established. Combined with the existing displacement and degeneration of the ground and structures and the safety factor, the displacement control standards can be eventually determined. The theoretical framework of in-process control is established which is based on the prediction, measurement, and control standards of the displacements. In the framework, the prediction model can be modified in time, and the tunnelling parameters can be adjusted synchronously. The current research is successfully applied in the Qinghuayuan Tunnel Project.

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The Effect of Overlying Strata on the Distribution of Ground Movements Induced By Tunnelling In Clay

Cited by 46 publications

References 4 publications

Centrifuge modelling of tunnelling induced ground displacements: pressure and displacement control tunnels

Centrifuge modelling of tunnelling induced ground displacements: pressure and displacement control tunnels

Deformation analysis of tunnel excavation below existing pipelines in multi‐layered soils based on displacement controlled coupling numerical method

Movements and Its In‐Process Control of Ground and Built Structures due to Tunnelling in Urban Areas

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