Permeability evaluation and its implications for consolidation analysis of an Italian soft clay deposit

2001 ◽  
Vol 38 (6) ◽  
pp. 1166-1176 ◽  
Author(s):  
Giampaolo Cortellazzo ◽  
Paolo Simonini
Keyword(s):  
Finite Element ◽  
Soft Clay ◽  
Silty Clay ◽  
The Finite Element Method ◽  
Consolidation Process ◽  
Permeability Characteristics ◽  
Clay Deposit ◽  
Consolidation Rate ◽  
Permeability Evaluation

The present research concerns a comparative analysis of the possible methods for estimating soft silty clay permeability to be used in the analysis of consolidation. For this purpose the consolidation response of a thick and homogeneous, instrumented soft silty clay deposit, on which an embankment was constructed, is back-analyzed using the finite-element method. To model the consolidation process, permeability data are carefully determined both from laboratory and in situ piezocone tests. One-dimensional and triaxial permeability test data are compared with the results of piezocone dissipation tests, the latter interpreted using four different solutions. The effects of anisotropy on permeability characteristics influencing the consolidation rate are also discussed.Key words: consolidation, embankment, finite-element analyses, permeability, piezocone, soft silty clay.

A Study of Pile-Soil Interaction Behavior Under Static, Cyclic and Dynamic Lateral Loadings

1984 ◽  
Vol 106 (4) ◽  
pp. 496-501
Author(s):  
M. Gao ◽  
D. B. Chin ◽  
M. Y. Ma ◽  
R. G. Sun
Keyword(s):  
Soft Clay ◽  
Triaxial Tests ◽  
Silty Clay ◽  
The Finite Element Method ◽  
In Situ Experiment ◽  
Soil Stiffness ◽  
Interaction Behavior ◽  
Dynamic Loadings ◽  
Steel Pipe Pile

In this paper, the pile-soil interaction behavior of a large-sized steel pipe pile in soft silty clay along the downstream of the Yangtze River is analyzed and discussed through an in-situ experiment under lateral static, cyclic and dynamic loadings, along with the static and dynamic triaxial tests on soil samples in laboratory. In the analysis, the finite element method and other simplified methods are compared using different models of lateral soil stiffness. From the results of the tests as well as the analysis, a possible formulation of the p-y curves of the pile in soft clay under lateral loadings is suggested, and a simplified method of dynamic analysis taking into account of the pile-soil interaction is also proposed.

scholarly journals DEFORMATION ANALYSIS OF EARTH-RETAINING WALL DURING EXCAVATION OF NAKANOSHIMA SOFT CLAY DEPOSIT BY AN ELASTO-VISCOPLASTIC FINITE ELEMENT METHOD

2009 ◽  
Vol 65 (2) ◽  
pp. 492-505 ◽  
Author(s):  
Fusao OKA ◽  
Yosuke HIGO ◽  
Michio NAKANO ◽  
Hiroyuk MUKAI ◽  
Toru IZUMITANI ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Retaining Wall ◽  
Soft Clay ◽  
Deformation Analysis ◽  
Clay Deposit ◽  
Element Method

Analysis of a sanitary-embankment failure over the Rio de Janeiro soft clay deposit

1991 ◽  
Vol 28 (1) ◽  
pp. 92-102 ◽  
Author(s):  
Renato Pinto Da Cunha ◽  
Willy Alvarenga Lacerda
Keyword(s):  
Rio De Janeiro ◽  
Soft Clay ◽  
Triaxial Tests ◽  
Guanabara Bay ◽  
Total Stress ◽  
Clay Deposit ◽  
Geotechnical Characteristics ◽  
Penetration Tests ◽  
Oedometer Tests

This paper presents the analysis of an embankment failure over a soft clay deposit in the district of Caju, Rio de Janeiro. The uncommon feature of the analysis is related to the embankment's material, which is mainly composed of dumped sanitary and rubble fill, and the unconsolidated state of the subjacent clay layer. Index tests were performed to obtain geotechnical characteristics and a profile of the soft clay deposit, which were compared with a well-known Brazilian clay from the same area (Guanabara Bay). Oedometer tests, in situ and laboratory vane tests, standard penetration tests, and conventional triaxial tests were also carried out. Total stress calculations were used to interpret and back analyze the failure and also to obtain the mobilized shear strength at both the fill and clay foundation. It was concluded that for an embankment cohesion of 0–20 kPa, the ratio between the back-analyzed Cu and the in situ postfailure Cu has a magnitude similar to the soft clay sensitivity. Key words: case history, sanitary fill, soft clay.

scholarly journals Optimisation of the Orchestra Pit Acoustics in Opera Houses by Acoustical Simulations using the Finite Element Method

2018 ◽  
Vol 251 ◽  
pp. 04065
Author(s):  
Jan Michael Kimmich ◽  
Anton Schlesinger ◽  
Martin Ochmann ◽  
Stefan Frank
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Acoustic Properties ◽  
The Finite Element Method ◽  
Low Frequencies ◽  
Hearing Ability ◽  
Opera Houses ◽  
High Sound ◽  
Element Method

Musicians in the orchestra pit in opera houses are exposed to relatively high sound pressure levels during the rehearsals and the performance. As a consequence, the communication between the diverse musicians is disturbed and potentially the hearing ability is endangered. In order to improve the situation for the musicians in-situ measurements of the room acoustic properties are performed (e.g. reverberation time T, clarity C80, strength G etc.) in order to provide evaluation data. On the other hand, acoustic simulations of the entire opera house or parts of it are performed by both the Finite Element Method (FEM) for low frequencies and the ray tracing approach for middle and high frequencies. The results are compared to the experimental data. Subsequently, optimization measures, like additional absorbers or diffusers, can be investigated in detail by the simulations. The most promising will eventually be chosen for realization and be measured in-situ.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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