By Jinchun Chai

ISBN-10: 9400717202

ISBN-13: 9789400717206

This publication bargains with the behaviour of soppy flooring stronger through a number of the extra universal tools, together with the set up of prefabricated vertical drains (PVDs), or the deploy of soil-cement columns shaped via deep blending, or the preloading of sentimental flooring by way of program of a vacuum strain as well as, or rather than, a surcharge loading. specifically, it describes the theories and the numerical modelling recommendations which may be utilized to those tender floor development schemes to estimate the instant and time-dependent mechanical reaction of the in situ soil. specific emphasis has been put on equipment that reliably expect floor deformations linked to floor development techniques.

The e-book commences with a short description of some of the flooring development tools after which describes basic options for modelling the behaviour of soppy clay subsoils via the finite aspect strategy, in addition to info of the equipment for modelling gentle soils stronger via the set up of PVDs. additionally it is chapters describing the speculation of vacuum consolidation and strategies for calculating vacuum pressure-induced floor deformation, in addition to a concept which might be used to foretell the reaction of soppy floor more advantageous by means of the install of soil-cement columns. an immense distinguishing characteristic of this booklet is the regimen use of comparisons of predictions of the proposed types with the result of laboratory experiences, and especially box case stories, in an effort to validate the proposed tools of research. the sector case histories are from gentle soil websites at a variety of destinations round the world.

The publication is directed in the direction of scholars of geotechnical engineering in addition to geotechnical practitioners. primarily it presents entire derivations of lots of the vital theoretical effects, because the purpose was once to put in writing a booklet that may be used as either a instructing textual content and a reference paintings for college kids and practitioners.

Audience: The e-book is meant for geotechnical practitioners in addition to for students.

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Additional resources for Deformation Analysis in Soft Ground Improvement

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The model ground was made of a mixture of Kobe clay, Toyoura sand and crushed Toyoura sand powder, in the ratios 2:1:1 by dry weight. The mixture was made into a slurry with an initial water content of 70% and de-aired. 16 m. 0 m and rotated at 203 rpm). This procedure resulted in an over-consolidated (OC) layer at the surface (about 54 mm in thickness) with a normally consolidated (NC) layer below it. 15 m), was placed on the surface of the model ground at the central location. During the test, the weight of the footing was cancelled by using a counter weight, as shown in Fig.

The model requires either nine parameters, when a Mohr-Coulomb hexagon is chosen for the shape of the yield surface in the deviatoric plane, or 11 parameters, when the general shape proposed by van Eekelen is adopted instead. 1. 34) The undrained shear strength predicted by this model can be calculated as follows (Grammatikopoulou et al. 35) where p i = the initial mean effective stress, and θ = the Lode angle at failure. 1 Class-A Prediction of Centrifuge Footing Test Results In 1994, the former Japanese Society of Soil Mechanics and Foundation Engineering (JSSMFE) (currently the Japanese Geotechnical Society (JGS)) organized a class-A prediction (Lambe 1973) of a footing load test on a clay soil model tested in a centrifuge.

3 Effects of Yield Surface and Plastic Potential Grammatikopoulou et al. (2007) conducted a numerical study on the effect of the yield and plastic potential surfaces on the predicted failure height of an embankment constructed on a deposit of soft Champlain clay at Saint-Alban, Quebec, Canada. 9 m and the geometry of the embankment at failure is shown in Fig. 15 (based on information provided by Grammatikopoulou et al. 2007). 7 m. 6 m C (b) Cross-section Fig. 15 Geometry of the embankment at failure (after Grammatikopoulou et al.

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Deformation Analysis in Soft Ground Improvement by Jinchun Chai

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