Effects from diaphragm wall installation to surrounding soil and adjacent buildings

Comodromos, Emilios M.; Papadopoulou, Mello C.; Konstantinidis, Georgios K.

doi:10.1016/j.compgeo.2013.05.003

Cited by 35 publications

(15 citation statements)

References 13 publications

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“…The creation of three-dimensional building models often ends with the foundations, with the as-sumption of a rigid foundation underneath, described by a single-parameter susceptibility [5][6][7], or an analysis of the subsoil body with a small fragment of the structure [8]. Generally, calculations require combining elements described by completely different constitutive laws [9][10][11]. The proper verification of numerical analyses is possible on the basis of geodetic observations of the movements of the building.…”

Section: Introductionmentioning

confidence: 99%

A FEM analysis of the settlement of a tall building situated on loess subsoil

Nepelski

2020

Open Engineering

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In order to correctly model the behaviour of a building under load, it is necessary to take into account the displacement of the subsoil under the foundations. The subsoil is a material with typically non-linear behaviour. This paper presents an example of the modelling of a tall, 14-storey, building located in Lublin. The building was constructed on loess subsoil, with the use of a base slab. The subsoil lying directly beneath the foundations was described using the Modified Cam-Clay model, while the linear elastic perfectly plastic model with the Coulomb-Mohr failure criterion was used for the deeper subsoil. The parameters of the subsoil model were derived on the basis of the results of CPT soundings and laboratory oedometer tests. In numerical FEM analyses, the floors of the building were added in subsequent calculation steps, simulating the actual process of building construction. The results of the calculations involved the displacements taken in the subsequent calculation steps, which were compared with the displacements of 14 geodetic benchmarks placed in the slab.

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Section: Introductionmentioning

confidence: 99%

A FEM analysis of the settlement of a tall building situated on loess subsoil

Nepelski

2020

Open Engineering

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“…where is the soil weight, is the equivalent concentrated force by , is the lateral force by filled slurry, is the hydrostatic groundwater force, is the effective normal force, and is the shear force on the failure plane. Through the calculations of the forces in (8), they are expressed…”

Section: Theorymentioning

confidence: 99%

“…in the expression of / , and and ℎ are unit weight and the height of the filled slurry, respectively. Solving (8) for the safety factor of the wedge, the following is obtained:…”

Section: Theorymentioning

confidence: 99%

“…Therefore, slurry trench stability is a major concern. However, most of the existing studies focused on the ground movements and stress relief induced by diaphragm wall construction: Poh and Wong concluded that evaluated aspects of performance include lateral and vertical soil movements during the construction of the test wall panel [1]; Ng and Yan confirmed the horizontal arching and downward load transfer mechanisms during diaphragm wall installation using the finite difference method [2]; Gourvenec and Powrie investigated the impact of three-dimensional effects and panel length on horizontal ground movements and changes in lateral stress during the sequential installation of a number of diaphragm wall panels [3]; Ng and Lei derived an analytical solution for calculating horizontal stress changes and displacements caused by the excavation for a diaphragm wall panel [4]; Schäfer and Triantafyllidis investigated the influence of a diaphragm wall construction on the stress field in a soft clayey soil [5]; Arai et al conducted to examine ground movement and stress after the installation of circular diaphragm walls and soil excavation within the walls [6]; Conti et al studied the mechanisms of load transfer and the deformations of the ground during slurry trenching and concreting in dry sand [7]; Comodromos et al proposed a new approach for simulating the excavation and construction of subsequent panels to investigate the effects from the installation of diaphragm walls on the surrounding and adjacent buildings [8]; Lei et al proposed an approximate analytical solution to predict ground surface settlements along the centre-line perpendicular to a slurry-supported diaphragm wall panel [9]. Until now, the problem of the slurry trench stability gradually receives much attention in underground engineering.…”

Section: Introductionmentioning

confidence: 99%

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Stability of Three-Dimensional Slurry Trenches with Inclined Ground Surface: A Theoretical Study

Jin

Liang

Zhu

2015

Advances in Materials Science and Engineering

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Stability of slurry trenches is an important issue during the construction of the groundwater cutoff walls and diaphragm walls, and thus gradually draws attention. In this paper, a theoretical method for a three-dimensional trench model with an inclined ground was proposed. Based on the Coulomb-type force equilibrium, a safety factor assessing the stability was derived. The results showed that the existing two-dimensional model was conservative compared to the present three-dimensional model; concretely, a greater inclined angle of the inclined ground and trench length decreased the safety factor. This work could be used to assess the trench stability for both 2D and 3D cases with inclined ground surfaces.

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“…It is often necessary to combine elements described with completely different constitutive laws, and correct verification of calculations is possible only on the basis of geodetic observations of the displacement of the object. Examples of such calculations are described in [9] [10].…”

Section: Introductionmentioning

confidence: 99%

The methodology of choice Cam-Clay model parameters for loess subsoil

Nepelski

Błazik‐Borowa

2018

AIP Conference Proceedings

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A heuristic approach to optimization of structural topology including self-weight AIP Conference Proceedings 1922, 020001 (2018) Abstract. The paper deals with the calibration method of FEM subsoil model described by the constitutive Cam-Clay model. The four-storey residential building and solid substrate are modelled. Identification of the substrate is made using research drilling, CPT static tests, DMT Marchetti dilatometer, and laboratory tests. Latter are performed on the intact soil specimens which are taken from the wide planning trench at the depth of foundation. The real building settlements was measured as the vertical displacement of benchmarks. These measurements were carried out periodically during the erection of the building and its operation. Initially, the Cam Clay model parameters were determined on the basis of the laboratory tests, and later, they were corrected by taking into consideration numerical analyses results (whole building and its parts) and real building settlements.

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Effects from diaphragm wall installation to surrounding soil and adjacent buildings

Cited by 35 publications

References 13 publications

A FEM analysis of the settlement of a tall building situated on loess subsoil

A FEM analysis of the settlement of a tall building situated on loess subsoil

Stability of Three-Dimensional Slurry Trenches with Inclined Ground Surface: A Theoretical Study

The methodology of choice Cam-Clay model parameters for loess subsoil

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