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Tuesday, May 5, 2020 | History

3 edition of The Influence of Anisotropy on the Consolidation Behaviour of Peat found in the catalog.

The Influence of Anisotropy on the Consolidation Behaviour of Peat

  • 159 Want to read
  • 35 Currently reading

Published by IOS Press/Delft University Press .
Written in English

    Subjects:
  • Life Sciences - Biochemistry,
  • Science,
  • Science/Mathematics

  • The Physical Object
    FormatPaperback
    Number of Pages221
    ID Numbers
    Open LibraryOL12803860M
    ISBN 109040726159
    ISBN 109789040726156

    By using the method of slices, the effect of soil anisotropy on slope stability for the C-cp soils was evaluated quite easily. The results of the analysis obtained are presented in Fig. 5 as the var- iation of stability number, Ns, with the mobilized angle of friction, CPm (where CPm = tan-I (tancp/Fs)), for different slope angles and for Kj = Modelling pre-failure deformation behaviour of reinforced soil walls Stiffness determination and deformation analysis for a trial excavation in Oxford Clay The influence of pre-failure soil stiffness on the numerical analysis of tunnel constructionPart 2 Cyclic deformation characteristics of clay under different consolidation histories. Compaction parametric quantities versus consolidation emphasis for Portage peat(Dhowian and Edil, ) Strength and stiffness. McGeever () concluded that peat normally has important anisotropy emphasis behaviour. This normally produces different value of effectual shear strength from every different type of trial. Abstract. Secondary compression is important in peat deposits because they exist at high void ratios and exhibit high values of compression index C{sub c}, display the highest values of C{sub {alpha}}/C{sub c} among geotechnical materials, and primary consolidation is completed in weeks or .


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The Influence of Anisotropy on the Consolidation Behaviour of Peat by C. Zwanenburg Download PDF EPUB FB2

Numerical results show that the anisotropy of permeability and the compressibility of pore fluid have remarkable influence on the consolidation behavior of poroelastic medium. Soft soil is often described as an anisotropic heterogeneous material.

Standard soil investigation mainly involves vertically retrieved samples. Information on the parameters working in the horizontal direction remains scarce. Principally each soil property like permeability, stiffness or strength might show anisotropic behaviour.

Principally each soil property like permeability, stiffness or strength might show anisotropic behaviour. This thesis focuses on anisotropy in stiffness and the possibility to use conventional laboratory measurement techniques to determine the level of anisotropy in Author: C. (author) Zwanenburg.

Principally each soil property like permeability, stiffness or strength might show anisotropic behaviour. This thesis focuses on anisotropy in stiffness and the possibility to use conventional laboratory measurement techniques to determine the level of anisotropy in by: 8.

Influence Of Anisotropy On The Consolidation Behaviour Of. PDF Password Recovery Recovery system is a powerful tool which decrypts password protected documents PDF OCR Optical Character Recognition extracts text from PDF files and images Merge PDF Allows you to. The solution shows that anisotropy in stiffness strongly influences the consolidation process.

The influence of anisotropy in stiffness is found in the initial pore pressure reaction, in the Mandel-Cryer effect and in the consolidation coefficient.

Measurements on conventional sized peat samples appear not to correspond to the analytical solution. Influence of anisotropic consolidation stress paths on compression behaviour of reconstituted Wenzhou clay J. Shi, S. Qian, L. Zeng and X. Bian Manifa field causeway, Saudi ArabiaCited by: 7. The solution shows that anisotropy in stiffness strongly influences the consolidation process.

The influence of anisotropy in stiffness is found in the initial pore pressure reaction, in the Mandel-Cryer effect and in the consolidation coefficient. Measurements on conventional sized peat samples appear not to correspond to the analytical by: 3.

Four peat samples, covering a wide range of fiber contents, were subjected to one-dimensional consolidation tests. Significant compression and effluent outflow take place after the dissipation of measurable excess pore water pressure, while permeability decreases drastically during consolidation.

Influence of anisotropic consolidation stress paths on compression behaviour of reconstituted Wenzhou clay J. Shi, S. Qian, L. Zeng and X. Bian Briefing: olympic delivery authority’s transport strategyCited by: 7.

An elasto-viscoplastic model was used to investigate the influence of anisotropy and creep effect on the settlement behaviour of the embankment. The constitutive model, namely ACM accounts for combined effects of plastic anisotropy and by: 6. Order The influence of anisotropy on the consolidation behaviour of peat ISBN @ € Qty: When designing a foundation for an embankment its influence on its surroundings is often an important issue.

In considering this influence a proper indication of horizontal deformations and horizontal stresses in the subsoil is needed. The influence of anisotropic stiffness on the consolidation of peat Zwanenburg, C. & Barends, FBJ.,In: Soils & Foundations. 47, 3, p.

10 p. Research output: Contribution to journal › Article › Scientific › peer-review. The influence of anisotropic stiffness on the consolidation of peat C. Zwanenburg1,2, F.B.J. Barends1,2 ABSTRACT: An analytical solution for the consolidation problem of an axially loaded triaxial sample including anisotropy in stiffness is presented.

The solution shows that anisotropy in stiffness strongly influences the consolidation process. Shelby specimens were found to be inherently cross-anisotropic, whereas the remoulded peat and peat fibre specimens showed a transition from isotropic to cross-anisotropic with increasing vertical strain and effective confining pressure.

The horizontal stiffness of Shelby specimens was found to be to times their vertical by: Basic descriptions of peat.

High in organic matter content. Peat is formed by the gradual accumulation of plant remnants, and the natural organic matter content in peat is high and variable.

It has been recognized that the presence of organic matter has significant effects on engineering properties of by: 1. Such unusual compression behavior of the soil is attributed to several factors including the initial water content, void ratio, initial permeability, fiber content and arrangement and the condition in which the peat is deposited (Gofar and Sutejo, ).

diameter were observed to influence the engineering behavior of peats. The effect of cement was the highest on sapric peat among all, due to its physico-chemical properties. The results of Rowe cell were used to simulate the consolidation behavior using finite.

The effects of strength anisotropy of geomaterials in slope stability problems are the focus of this paper. The source of the strength anisotropy could be attributed to many factors and the motivation of this study is to concentrate on the effects of plane of weaknesses, such as joints, bedding planes etc.

on the slope stability analysis. Peat is a kind of special material rich in organic matter. Because of the high content of organic matter, it shows different deformation behaviors from conventional geotechnical materials. Peat grain has a non-negligible compressibility due to the presence of organic matter.

Biogas can generate from peat and can be trapped in form of gas by: 1. This paper investigates the influence of anisotropy and destructuration on the behavior of a test embankment on soft clay. The test embankment at Murro, Finland, was commissioned in by the Finnish Road Administration and has been monitored for over 10 construction and consolidation of Murro test embankment is analyzed with finite element method using three different.

dependant shear strength (strength anisotropy). Other aspects of soil behaviour that should be considered also include factors such as compaction, dilatancy and memory of pre-consolidation stress. In addition to soil behaviour, its failure in three-dimensional state of stress is extremely Size: KB.

The influence of anisotropy on the consolidation behaviour of peat Zwanenburg, C. (author) Soft soil is often described as an anisotropic heterogeneous material. Zwanenburg C., Barends F.B.J. () The influence of anisotropic stiffness on the consolidation of peat Soils and Foundations 47(3) Zwanenburg C., Barends F.B.J.

() The influence of anisotropic stiffness on the efficiency of vertical drains Géotechnique 56(10) Influence of Time on Stress-Strain-Strength Behavior of Clays During Undrained Shear (PDF - MB) LCJ: Strength IID Strength IID, IIE and IIF: Staged Construction (PDF - MB) AJW: Shear Modes Clay Anisotropy and E3 Soil Model: AJW: Sands: Stress-Strain-Strength Behavior of Cohesionless Soils: AJW: Sands (cont.) Effects of.

It is thus important to propose an appropriate consolidation model to describe the mechanical characteristics and the deformation behavior of peat. In this paper, a consolidation model is proposed for peat under the three phase composition of this material.

The model considers the compressibility of organic matter and entrapped gas bubbles in by: 1. Improving engineering properties of peaty soil by biogeotechnology: GUI Yue 1,2, WU Cheng-kun 1, LIU Ying-shen 1, GAO Yu-feng 2, HE Jia 2: 1.

Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, KunmingChina; 2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, NanjingChina. Soft Soil Engineering book. Soft Soil Engineering. DOI link for Soft Soil Engineering.

Consolidation behaviour of a soft soil foundation improved using DJM method. With Jun-Gao Zhu, Yun Yan, Anisotropy of Shear Strength of Layered Rocks and Determination of Shear Failure by: Mire morphology and the properties and behaviour of some British and foreign peats N.

Hobbs. Mire morphology and the properties and behaviour of some British and foreign peats. the consolidation phase is properly regarded as but a temporary aberration.

It follows from this that the so-called preconsolidation pressure is a function of Cited by: This investigation examines effects of anisotropic versus isotropic consolidation in consolidated-undrained triaxial compression tests performed on specimens of two clays consolidated from a slurry in large-diameter consolidometers.

Shear strength and corresponding deformation characteristics were developed in both normally consolidated and Cited by: Bishop, A.W.

(), ‘Test requirements for measuring the coefficient of earth pressure at rest’, in Proc. Brussels Conf. 58 on Earth Pressure Problems (Brussels: Belgian Group of the International Society of Soil Mechanics and Foundation Engineering), vol.

1, pp. 2– Shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that a soil can sustain. The shear resistance of soil is a result of friction and interlocking of particles, and possibly cementation or bonding at particle contacts.

Due to interlocking, particulate material may expand or contract in volume as it is. The influence of the settling behavior of soil particles in clay-water slurry on the homogeneity and consolidation properties of the final sediment were assessed in the current study.

Standard one-dimensional and radial consolidation tests were. Consolidation and Permeability of Transparent Amorphous Silica. Design Criteria for Geotomographic Field Studies.

Strength and Deformation Behavior of Soft Bangkok Clay. Shake Table Calibration and Specimen Preparation for Liquefaction Studies in the Centrifuge. Anisotropic Consolidation Behavior of Soft Bangkok Clay. The c and φ values are first adjusted for anisotropy before they are used in the shear strength computation.

For more information on this strength model, refer to the chapter in the SLOPE/W engineering book on material strength. The input parameters defined for the anisotropic strength of soil #1 are as shown in Table Size: 66KB. Anisotropy (/ ˌ æ n. ə- ˌ æ n. aɪ ˈ s ɒ t r.

ə p. i /) is the property of being directionally dependent, which implies different properties in different directions, as opposed to can be defined as a difference, when measured along different axes, in a material's physical or mechanical properties (absorbance, refractive index, conductivity, tensile strength, etc.).

The field of experimental unsaturated soil mechanics has grown considerably over the last decade. In the laboratory and in the field, innovative techniques have been introduced into mechanical, hydraulic, and geo-environmental testing.

Normally, this information is widely dispersed throughout journa. Construction of road embankments or other infrastructures on soft peat is a challenge.

The main problems are high compressibility and rather low undrained shear strength of peat. Mass stabilization provides a solution to improve the properties of a peaty subgrade. Mass stabilization is a ground improvement method, where hardened soil mass is created by adding binder into soil and by Cited by: 1.

The behaviour and strength of this highly deformed layer are thus key properties of a rail or wheel material. Microhardness and 3D head check crack geometry analyses of the surface layer of a rail (from field) were conducted in project MU24 and the modelling of anisotropic evolution and response of highly deformed pearlitic steel was developed.

CONSOLIDATION INFLUENCE OF DRAINAGE ON RATE OF SETTLEMENT When a saturated stratum of sandy soil is subjected to a stress increase, such as that caused by the erection of a building on the ground surface, the pore water pressure is increased.

This increase in pore pressure leads to drainage of some water from the voids of the soil. BecauseFile Size: KB. Anisotropic behaviour of the clay core, blanket, and foundation of aging water retaining earth fill dams on glacio-lacustrine clay deposits in Canada may be a result of environmental loading.

The repeated wetting-drying and freezing-thawing cycles produce fissures that can cause degradation of .This work explores the influence of evolving anisotropy on the stress-strain behaviour of unsaturated soils and proposes a new constitutive elasto-plastic model for unsaturated soils accounting for evolving anisotropy.

An extensive campaign of laboratory tests on both isotropically and anisotropically compacted soil samples under a wide range of stress paths was performed.After normal isotropical consolidation of the samples in the triaxial cell, undrained compression and extension tests with pore water pressure measurement were performed, and the influences of confining pressure, loading path, amount of organic matter and fabric anisotropy on the undrained shear behavior of peat were investigated.