The Effects of Multipropped Deep Excavation-Induced Ground

The Effects of Multipropped Deep Excavation-Induced Ground

Three-dimensional deformation behaviour of a multi-propped

Abstract Despite the large number of excavation-induced ground deformations reported in the literature, it is still not easy to differentiate ground deformations due to excavation in congested sites (where the ground is strengthened by underground structures) from those due to excavation in "greenfield" sites. To investigate and compare excavation-induced ground deformations in

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Stress transfer mechanisms and settlement of a floating

Dec 01, 2019 · When the normalised excavation depth (H e /L p) is equal to 0.4 (i.e., final excavation depth of 8.0 m), increasing the system stiffness by more than 15 times has limited effects on the induced pile settlement (a change of 0.03% d p). This is because limited stress relief and soil deformation are induced in shallow basement excavation.

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Use of unsaturated small-strain soil stiffness to the

Mar 01, 2020 · Excavation-induced excessive wall deflection and ground surface settlement can have serious consequences on the surrounding buildings and services. Based on the field data, many empirical and semi-empirical equations, and design charts have been proposed to predict excavation-induced wall deflection and ground surface settlement [1], [2], [3

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Analysis of excavation-induced responses of loaded pile

A two-stage analysis method is then proposed to study the behavior of pile foundations subjected to excavation-induced ground movements. This method can take the influence of working loads acting on pile heads into account, and overcome some deficiencies of existing methods.

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(PDF) Effects of Multipropped Excavation on an Adjacent

Mar 07, 2017 · Stress relief and ground movement induced by deep excavations. will inevitably cause additional effects on adjacent pile foundations were carried out to study the effects of a …

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Figure 13 | The Effects of Multipropped Deep Excavation

The Effects of Multipropped Deep Excavation-Induced Ground Movements on Adjacent High-Rise Building Founded on Piled Raft in Sand Figure 13 Induced bending moment along four piles (i.e., P1, P2, P3, and P4).

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Investigation on performance of a large circular pit-in

Sep 01, 2018 · Additionally, this PIP excavation incurred much smaller ground settlements (between δ vm = 0.05 % H and δ vm = 0.13 % H) along with smaller settlement influence zone (within 1.5H e from the pit) than those multipropped excavations in sand, stiff to hard clay, and mixed strata worldwide as well as the PIP excavation in Shanghai soft clay. (4)

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Effects of Multipropped Excavation on an Adjacent Floating

Apr 04, 2021 · Abstract. Excavation induces stress changes and soil movement on existing floating piled rafts and elevated pile groups. Limited investigation of the effects of deep excavations has resulted in an incomplete understanding of pile foundation performance at the serviceability state. A series of three-dimensional (3D) centrifuge model tests and numerical …

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The Effects of Multipropped Deep Excavation-Induced Ground

Jul 07, 2017 · Abstract. Deep excavations inevitably induce stress relief and soil movement, which may affect the safety and serviceability of nearby existing pile foundations. Although the effects of excavation on adjacent piles have been studied, excavation-induced pile settlement and change of shaft resistance deserve more investigation.

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Three-dimensional deformation behaviour of a multi-propped

Abstract Despite the large number of excavation-induced ground deformations reported in the literature, it is still not easy to differentiate ground deformations due to excavation in congested sites (where the ground is strengthened by underground structures) from those due to excavation in "greenfield" sites. To investigate and compare excavation-induced ground deformations in

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TheEffectsofMultiproppedDeepExcavation-InducedGround

used to study the effect of excavation construction, and LiyanapathiranaandNishanthan[14]andZhangetal.[15] analyzed the excavation-induced pile behaviour using the finite element methodand the centrifugetest. In termsof influence parameters of excavation construction, Yashiro et al. [16] conducted parameter analysis …

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Influence of stress relief due to deep excavation on

Pile foundations are commonly used to support tall buildings with a deep basement in major cities such as Hong Kong, Shanghai and London. The design of pile foundations is often based on load tests carried out at the ground surface, prior to basement excavation. A sleeve may be used in a load test to eliminate shaft resistance within the entire depth of the planned excavation.

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Investigation on performance of a large circular pit-in

Sep 01, 2018 · Additionally, this PIP excavation incurred much smaller ground settlements (between δ vm = 0.05 % H and δ vm = 0.13 % H) along with smaller settlement influence zone (within 1.5H e from the pit) than those multipropped excavations in sand, stiff to hard clay, and mixed strata worldwide as well as the PIP excavation in Shanghai soft clay. (4)

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Understanding ground deformation mechanisms for multi

The execution of these deep 9 excavation works requires the use of appropriate retaining wall and bracing systems. Inadequate 10 support systems have always a major concern, as any excessive ground movement induced during 11 excavation could cause damage to neighboring structures, resulting in delays, disputes and cost 12 overruns.

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A case study on the behaviour of a deep excavation in sand

May 01, 2009 · Abstract A complete case record of an excavation in sand is explored in this study. Numerical analyses were conducted to evaluate the influences of soil elasticity, creep and soil–wall interface. Back-analyses indicate small strain parameters should be used if an elastic–perfect plastic model is selected. In addition, excavation-induced seepage has only a …

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Determination of Safe Depth and Lateral Distance of

Apr 06, 2021 · [12] M. A. Soomro, N. Mangi, W. C. Cheng, and D. A. Mangnejo, (2020) "The Effects of Multipropped Deep Excavation-Induced Ground Movements on Adjacent High-Rise Building Founded on Piled Raft in Sand" Advances in Civil Engineering 2020: DOI: 10.1155/2020/8897507.

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Understanding ground deformation mechanisms for multi

sequence of a multi-propped wall for deep excavations can be simulated in flight. Deformation mechanisms are observed using Particle Image Velocimetry. Settlements of the ground surface and changes in pore water pressure are monitored during the excavation. The effects of prop

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Effects of Multipropped Excavation on an Adjacent Floating

Deep excavations inevitably induce stress relief and soil movement, which may affect the safety and serviceability of nearby existing pile foundations. Although the effects of excavation on adjacent piles have been studied, excavation-induced pile settlement and change of shaft resistance deserve more investigation.

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