A simplified analysis method for the influence of tunneling on grouped piles

Huang, Maosong; Zhang, Chenrong; Li, Zao

doi:10.1016/j.tust.2008.11.005

Cited by 151 publications

(61 citation statements)

References 19 publications

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“…Analytical works have generally taken the form of the two-step approach method (TSAM) (Chen et al, 1999), in which the assumed 'greenfield' settlements are used as input to either a boundary-element analysis or t-z load-transfer analysis. More recent analyses, such as those reported by Kitiyodom et al (2005), Huang et al (2009), Zhang et al (2011), Zhang et al (2013) and Basile (2014), have focused on pile groups and how to best model interaction factors between adjacent piles for linear elastic and non-linear elastic load-transfer curves. Such methods have proved to be reasonably successful for the back-analysis of centrifuge and field data associated with tunnelling adjacent to piles (using centrifuge and field data reported by Loganathan et al (2000) and Pang et al (2005), respectively).…”

Section: Introductionmentioning

confidence: 99%

“…(a) Kitiyodom et al (2004) and applied a linear elastic Winkler spring t-z analysis to the problem of tunnelling adjacent to piles, whereas Huang et al (2009) expanded this work for pile-to-pile interaction. Kitiyodom et al (2005) applied a method (the Prab code) based on a hybrid model that combines load-transfer analysis for a single pile response with a Mindlin-based BEM analysis to evaluate pile-soil-pile interaction.…”

Section: Introductionmentioning

confidence: 99%

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Open-face tunnelling effects on non-displacement piles in clay – part 2: tunnelling beneath loaded piles and analytical modelling

Williamson¹,

Mair

Devriendt

et al. 2017

Géotechnique

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Results from centrifuge modelling of tunnelling beneath loaded non-displacement piles in clay are presented in this paper; the principal variables were soil strength, pile loading and pile position relative to the tunnel. The details of the experimental set-up and the importance of understanding the loading history of the soil and the piles are presented in a companion paper. The subsurface pile-soil interaction was captured through particle image velocimetry; the effects of pile loading and pile position were found to have a significant impact on pile settlements. Analysis of tunnel-pile interaction through t-z load-transfer modelling of the pile-soil interface is presented using the approach described in the companion paper. The mechanisms observed in the centrifuge tests are predicted reasonably well. A significant improvement in the prediction of the induced pile loading and settlements was achieved with the inclusion of plasticity and simple power-law non-linearity for the soil.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Open-face tunnelling effects on non-displacement piles in clay – part 2: tunnelling beneath loaded piles and analytical modelling

Williamson¹,

Mair

Devriendt

et al. 2017

Géotechnique

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“…Loganathan et al, 2001;Kitiyodom et al, 2005;Huang et al, 2009;Zhang et al, 2011;Basile, 2012;Zhang et al, 2013). This has resulted in concerns over the structural integrity of the foundations due to increased lateral loading and bending moments on the affected piles.…”

Section: Introductionmentioning

confidence: 99%

Open-face tunnelling effects on non-displacement piles in clay – part 1: centrifuge modelling techniques

et al. 2017

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A research programme conducted at the University of Cambridge geotechnical centrifuge provided high-quality data on the interaction effects of open-faced tunnelling beneath non-displacement piles in clay. This paper presents details of the novel centrifuge package, including the reinforced composite piles used to measure loads during the centrifuge tests. Attention is particularly drawn to the importance of temperature compensation and the corresponding effect on the model piles. Results from maintained pile load tests conducted in the centrifuge are presented; through photogrammetric techniques, these are compared with data from pile load cells. The results, also compared with analytical t-z power-law modelling of the soil stress-strain behaviour based on triaxial tests, illustrate the importance of modelling the full history of both soil and piles prior to any subsequent tunnellinginduced loading. The experimental results of the simulated tunnelling tests on piles are presented and compared with simple analytical solutions in a companion paper.KEYWORDS: piles & piling; soil/structure interaction; tunnels & tunnelling INTRODUCTIONWith over half of humanity now living in urban areas, the demand on space and new transport infrastructure is unprecedented. The limited availability of surface space in major cities makes the demand for underground infrastructure, which often involves major tunnelling projects, increasingly more compelling. As a result, the construction of new underground railways, sewers and roadways is being undertaken in highly populated urban cities such as London, Amsterdam, Shanghai, Singapore and Hong Kong and many others using various tunnelling techniques.The stress changes from such tunnelling activities result in soil movements that propagate through the soil and are eventually observed as settlement and horizontal displacements at the ground surface. Significant research has gone into the prediction and observation of the effect of these ground movements on buildings supported by shallow foundations (e.g. Burland, 1997;Potts & Addenbrooke, 1997;Franzius et al., 2006;Farrell, 2010;Mair, 2011). However, there has been significantly less research on the effects of tunnelling-induced ground movements on piled foundations and the resulting interaction with the overlying structure(s) that these foundations support.Previous experimental modelling work investigating the effects of tunnelling on piles has mainly focused on the effects of tunnelling on driven piles (Loganathan et al., 2000;Jacobsz et al., 2004;Marshall & Mair, 2011). Driven piles are considered a 'worst-case' scenario, particularly in sands where the stress bulb at the pile toe is subjected to stress relief from tunnelling-induced ground movements that may result in pile failure, as shown by Marshall (2012). However, in order to reduce noise and vibration effects, the majority of piles constructed in major cities in recent years have been non-displacement (bored) piles, rather than driven piles. Field data from well-documented case ...

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“…Ma and Ding [4] adopted the finite element method to study tunnel-soil-building interaction using a displacement controlled model. Huang et al [5] developed a simplified method for analyzing the effect of tunneling on grouped piles. Chen et al [6] studied ground movement induced by parallel EPB tunnels in silty soils.…”

Section: Introductionmentioning

confidence: 99%

Impact of shield tunneling on adjacent spread foundation on sandy cobble strata

Fang

Wang

et al. 2014

J. Mod. Transport.

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The section of shield tunnel of the Chengdu Metro line passes primarily through sandy cobble strata. There are many buildings with spread foundations along the lines. Shield tunnel construction will disturb the ground, causing displacement or stress to adjacent spread foundations. Based on the similarity theory, a laboratory model test of shield tunnel driving was carried out to study the influence of shield tunnel excavation on the displacement of adjacent spread foundation. The results show that foundation closer to the tunnel has greater displacement or settlement than that further away. The horizontal displacement is small and is influenced greatly by the cutting face. The displacement along the machine driving direction is bigger and is significantly affected by the thrust force. Settlement occurs primarily when shield machine passes close to the foundation and is the greatest at that time. Uneven settlement at the bottom of the spread foundation reaches a maximum after the excavation ends. In a numerical simulation, a particle flow model was constructed to study the impact of shield tunnel excavation on the stresses in the ground. The model showed stress concentration at the bottom of the spread foundation. With the increasing ground loss ratio, a loose area appears in the tunnel dome where the contact force dropped. Above the loose area, the contact force increases, forming an archshaped soil area which prevents the loose area from expanding to the ground surface. The excavation also changed the pressure distribution around spread foundation.

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A simplified analysis method for the influence of tunneling on grouped piles

Cited by 151 publications

References 19 publications

Open-face tunnelling effects on non-displacement piles in clay – part 2: tunnelling beneath loaded piles and analytical modelling

Open-face tunnelling effects on non-displacement piles in clay – part 2: tunnelling beneath loaded piles and analytical modelling

Open-face tunnelling effects on non-displacement piles in clay – part 1: centrifuge modelling techniques

Impact of shield tunneling on adjacent spread foundation on sandy cobble strata

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