The influence of previous stress history and stress path direction on the surface settlement trough induced by tunnelling

Grammatikopoulou, A.; Zdravković, Lidija; Potts, David M.

doi:10.1680/geot.2008.58.4.269

Cited by 25 publications

(22 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The influence of the pre-failure soil stiffness and stress history of the ground on tunnelling-induced surface settlements, investigated using numerical analysis, has been reported in the literature (e.g. Addenbrooke et al, 1997, Grammatikopoulou et al, 2008. Construction of the Central Line tunnels more than a century ago and the consequent change of the stress regime in the surrounding ground would have reduced the soil stiffness and therefore led to the wider tunnelling-induced surface settlement troughs measured on the northern halves of the lines (closer to the existing tunnels), compared with those measured in 'greenfield' ground to the south.…”

Section: Vertical Displacements On Z-line (Periods 2 and 4)mentioning

confidence: 99%

Measured short-term ground surface response to EPBM tunnelling in London Clay

et al. 2017

Self Cite

View full text Add to dashboard Cite

Earth-pressure-balance machines (EPBMs) were used for the construction of Crossrail tunnels in London, providing opportunities for field investigation of consequent ground response. Analysed results from an instrumented research site in Hyde Park with extensive surface and subsurface monitoring arrays are presented and discussed. The Crossrail tunnels at the site are 34·5 m below ground, deeper than those in most case histories of tunnelling in stiff clay in the UK. This paper characterises the tunnelling-induced ground response, both 'greenfield' and in the proximity of the existing Central Line tunnels, dealing with measurements at the ground surface. A companion paper covers the subsurface ground response. Vertical and horizontal ground surface displacements were obtained from manual precise levelling and micrometer stick measurements. Several key findings will benefit future tunnelling projects involving EPBMs. Volume loss values measured at the instrumented site were low, being less than 0·8% and 1·4% for the first and second tunnel drives respectively, higher values being associated with ground softening from the first tunnel construction. Smaller volume losses were recorded in the vicinity of the existing Central Line tunnels, compared with the greenfield location, suggesting that their presence inhibited the development of ground movements. Asymmetric settlement troughs developed due to either the nearby pre-existing tunnels or the construction of the first tunnel. Marginally smaller values of trough width parameter, Ky, were determined for these deeper tunnels compared with previous greenfield ground case histories. Resultant vectors of ground surface displacement were directed to well-defined pointsinks above the tunnel axis level. BackgroundIn major cities like London, constructing new tunnels inevitably influences nearby existing structures above and within the ground. Much has been learnt about the complex interactions between the ground and existing underground structures from new tunnel construction reported through case studies. With advances in tunnelling technologies and practices and construction materials, engineers and researchers continuously endeavour to update and improve their understanding of ground and structural response to tunnel construction. Recently a comprehensive research project 2 has been run by Imperial College London to investigate the effect of tunnelling by modern earth pressure balance tunnel boring machines (EPBMs) on existing tunnels (Standing et al., 2015). Field measurements at an instrumented site in Hyde Park formed an integral part of the overall research project.Short-term tunnelling-induced ground surface displacements are still frequently predicted using empirical approaches (Attewell, 1978). Vertical displacements are estimated using a Gaussian formulation where there are two unknowns: volume loss (VL) and the trough width parameter (K). Of these, volume loss is the more difficult to predict, it depends on various factors such as method of tunnelling, g...

show abstract

Section: Vertical Displacements On Z-line (Periods 2 and 4)mentioning

confidence: 99%

Measured short-term ground surface response to EPBM tunnelling in London Clay

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…It should be noted that despite the fact that the model used in their analyses was able to follow the previous stress history of the site, this was not done. Instead the K 0 and intrinsic preconsolidation profiles derived by Grammatikopoulou et al (2008) for the St James's Park site were used. Additionally, even though the structure used in the model was within the available experimental range, it was quantified using an input parameter defined by the user rather than by modelling the previous stress history (to develop the field structure).…”

Section: Introductionmentioning

confidence: 99%

The use of kinematic hardening models for predicting tunnelling-induced ground movements in London Clay

2016

Self Cite

View full text Add to dashboard Cite

The use of a kinematic hardening soil model for predicting short-and long-term ground movements due to tunnelling in London Clay is investigated. The model is calibrated against oedometer and triaxial tests on intact samples from different units of the London Clay. The calibrated model is then used in finite-element analysis to simulate the field response at St James's Park during excavation of the Jubilee Line Extension tunnels. The finite-element predictions compare well with the available field monitoring data. The importance of using consistent initial conditions for this complex boundary value problem in conjunction with the model parameters selected is highlighted. The stiffness response of different regions of the finite-element mesh indicates that the rate at which the stiffness degrades and the stiffness response further away from the tunnel boundary affect the short-term predictions significantly. The long-term predictions confirm that the compression characteristics of the soil control the magnitude of the consolidation settlements and its permeability the shape of the long-term settlement profiles.

show abstract

“…8), 9) Sugimoto and Sramoon (2002) proposed a kinematic shield model to simulate shield TBM behavior during excavation on the basis of equilibrium conditions by considering ground displacement around the shield, 10) and extended their investigation to shield tunneling behavior along a curved alignment in a multilayered ground. 11) Considering the influence of previous stress history and stress path direction during tunneling, Grammatikopoulou, et al (2008) studied the ground surface settlement trough induced by tunneling and concluded that a more realistic undrained settlement trough induced by tunneling could be simulated if the effect of previous stress history was taken into account. 12) This study deals with the effect of earth pressure balanced (EPB) tunneling on the soil stress path and also the drained and undrained condition of the soil during tunnel advancement.…”

Section: Introductionmentioning

confidence: 99%

“…11) Considering the influence of previous stress history and stress path direction during tunneling, Grammatikopoulou, et al (2008) studied the ground surface settlement trough induced by tunneling and concluded that a more realistic undrained settlement trough induced by tunneling could be simulated if the effect of previous stress history was taken into account. 12) This study deals with the effect of earth pressure balanced (EPB) tunneling on the soil stress path and also the drained and undrained condition of the soil during tunnel advancement. The content is divided into three parts: 1) In the first part (section 2), the effect of EPB shield tunneling on the soil stress path is investigated.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Effect of Earth Pressure Balanced Shield Tunneling on Soil Stress-Deformation Behavior

Afshani

Dobashi²,

Komiya

et al. 2014

Journal of JSCE

View full text Add to dashboard Cite

Three-dimensional (3D) finite element analysis programs are widely used for numerical simulation of tunneling with different degrees of approximation and various approaches. This study deals with the effects of earth pressure balanced (EPB) tunneling on the stress path and drainage condition of the soil during tunnel advancement. First, by using the Mohr-Coulomb criterion, the 3D stress distribution of the area near the crown and spring line of the tunnel is investigated, after which the tunnel stress path with respect to the Mohr-Coulomb yielding surface is presented. It was concluded that in the case of EPB shield tunneling, the soil around the cutter head tended to be in the elastic domain. Next, the effect of EPB tunneling on the drained and undrained behavior of the soil is examined. By taking into account the three significant factors of a) advance rate of the tunnel face, b) consolidation coefficient of the soil, and c) overburden depth of the tunnel, a parametric study is conducted and a numerical experimental equation proposed for determining drained or undrained soil condition during shield tunnel advancement. Finally, a case study of EPB tunneling is introduced. By using the case study data and results of EPB tunneling on stress path analyses, the proposed equation is verified.

show abstract

The influence of previous stress history and stress path direction on the surface settlement trough induced by tunnelling

Cited by 25 publications

References 19 publications

Measured short-term ground surface response to EPBM tunnelling in London Clay

Measured short-term ground surface response to EPBM tunnelling in London Clay

The use of kinematic hardening models for predicting tunnelling-induced ground movements in London Clay

Numerical Analysis of the Effect of Earth Pressure Balanced Shield Tunneling on Soil Stress-Deformation Behavior

Contact Info

Product

Resources

About