Observations of Ground Movements during Tunnel Construction by Slurry Shield Method at the Docklands Light Railway Lewisham Extension—East London

Sugiyama, Tadashi; Hagiwara, Toshiyuki; Nomoto, Toshi; Nomoto, Masaaki; Ano, Y; Mair, RJ; Bolton, M. D.; Soga, Kenichi

doi:10.3208/sandf.39.3_99

Cited by 57 publications

(21 citation statements)

References 1 publication

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“…9. At these locations those settlements were subdivided into the following incremental contributions (Hulme et al, 1990;Moh et al, 1996;Sugiyama et al, 1999): D 1 representing the settlement cumulated up to the stage of construction corresponding to the face of second tunnel located at the monitored section, D 2 indicating the settlement added during the passage of the TBM from the face to the shield tail and the final contribution D 3 accounting for the residual settlement up to the steady-state value.…”

Section: (B) and (C)mentioning

confidence: 99%

Twin tunnel excavation in coarse grained soils: Observations and numerical back-predictions under free field conditions and in presence of a surface structure

Fargnoli

Boldini

Amorosi

2015

Tunnelling and Underground Space Technology

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Section: (B) and (C)mentioning

confidence: 99%

Twin tunnel excavation in coarse grained soils: Observations and numerical back-predictions under free field conditions and in presence of a surface structure

Fargnoli

Boldini

Amorosi

2015

Tunnelling and Underground Space Technology

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“…According to Sugiyama et al [21], the ground displacement caused by shield tunnelling can be divided into five types:…”

Section: Longitudinal Settlementmentioning

confidence: 99%

“…Generally, field measurement can be used in combination with other methods. Sugiyama et al [21] compared the field measurement of ground deformation due to slurry shield tunnelling with the model test and numerical simulation, and two kinds of practical design charts were proposed to appropriately predict the transverse surface settlement troughs in the clays or sands and gravels. Ocak [22] proposed a new empirical formula for estimating the surface transverse settlement trough of twin tunnels.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study and Field Monitoring of the Ground Deformation Induced by Large Slurry Shield Tunnelling in Sandy Cobble Ground

Zhang

Cai

Zhu

2019

Advances in Civil Engineering

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This paper presents the ground deformation induced by the large slurry shield tunnelling with a diameter of about 12 m in urban areas, which may challenge the safety of the existing nearby constructions and infrastructures. In this study, the ground deformation is analyzed by a three-dimensional finite difference model, involving the simulation of tunnelling advance, grouting, and grouting hardening. The transverse settlement, longitudinal settlement, and horizontal displacement of the ground are analyzed by comparing the simulation results with the field measurements in the Rapid Transit Line Project from Beijing Railway station to West Beijing Railway station in China. The numerical model proposed in this paper could well predict the ground deformation induced by large slurry shield tunnelling. The results show that the main transverse settlement occurs within the zone about 1.5 times of the excavation diameter, and the settlement during the passage of the shield and the tail void plays a most important role in the excavation process.

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“…In particular, the additional degree of freedom represented by α allows for more effective curve fitting for narrow settlement troughs. Several studies have highlighted that, in sandy soils, the width parameter i increases with the cover-to-diameter ratio, C/D, and decreases with the magnitude of volume loss, V l,t (Sugiyama et al, 1999;Marshall et al, 2012;Zhou et al, 2014).…”

Section: Empirical Methodsmentioning

confidence: 99%

Greenfield tunnelling in sands: the effects of soil density and relative depth

2019

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Tunnel construction is vital for the development of urban infrastructure systems throughout the world. An understanding of tunnelling-induced displacements is needed to evaluate the impact of tunnel construction on existing structures. Recent research has provided insight into the complex mechanisms that control tunnelling-induced ground movements in sands; however, the combined influence of relative tunnel depth and soil density has not been described. This paper presents data from a series of 15 plane-strain centrifuge tests in dry sand. The cover-to-diameter ratio, C/D, of the tunnels ranges between 1·3 and 6·3, thereby including relatively shallow and deep tunnels. The sand relative density varies between 30 and 90%, corresponding to loose and dense soils. The effects of C/D, soil density and volume loss on vertical and horizontal soil movements, shear strains and ground reaction curves are discussed. Analysis of surface and subsurface settlement trough characteristics shows that the mechanisms are non-linear and the effects of soil relative density and volume loss on deformation patterns are highly dependent on C/D. The role of soil arching in the definition of the displacement mechanisms and a discussion of the implications of the results to the assessment of damage to existing structures are also provided.

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Observations of Ground Movements during Tunnel Construction by Slurry Shield Method at the Docklands Light Railway Lewisham Extension—East London

Cited by 57 publications

References 1 publication

Twin tunnel excavation in coarse grained soils: Observations and numerical back-predictions under free field conditions and in presence of a surface structure

Twin tunnel excavation in coarse grained soils: Observations and numerical back-predictions under free field conditions and in presence of a surface structure

Numerical Study and Field Monitoring of the Ground Deformation Induced by Large Slurry Shield Tunnelling in Sandy Cobble Ground

Greenfield tunnelling in sands: the effects of soil density and relative depth

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