Improvements in measurements of consolidation parameters in the laboratory with the help of a permeameter apparatus (In French)

1991 ◽  
Vol 28 (6) ◽  
pp. A352
Author(s):  
P. Morin
Keyword(s):  
Consolidation Parameters

scholarly journals Verification of compressibility and consolidation parameters of varved clays from Radzymin (Central Poland) based on direct observations of settlements of road embankment

2018 ◽  
Vol 10 (1) ◽  
pp. 911-924
Author(s):  
Paweł Dobak ◽  
Kamil Kiełbasiński ◽  
Tomasz Szczepański ◽  
Piotr Zawrzykraj
Keyword(s):  
Field Tests ◽  
Correlation Coefficients ◽  
Careful Analysis ◽  
Calculation Model ◽  
Soil Reaction ◽  
Delayed Reaction ◽  
Direct Observations ◽  
Load Increase ◽  
Consolidation Parameters ◽  
Increasing Load

Abstract Formation of varved clays is characterized by specific compressibility and consolidation features, which are difficult to assess. The construction of an expressway through the area of varved, glacilimnic sediments (Vistula glacial period) required careful analysis of the soil reaction to the increasing load caused by growing embankment. The settlement analyses conducted in relation to the schedule of load increase during construction allowed to verify the deformability assessment of the compressible clays. In order to quantify the compressibility and consolidation parameters of clays, an iterative calculation model was created. The method of the “inverse solution” was used to define optimized values of deformability parameters. The observed delayed reaction of the soil to applied load allowed to assess the nature of consolidation. Comparison of the parameters obtained from the model with the results of laboratory and field tests allowed to evaluate drainage characteristics during consolidation of varved clays as well as to introduce correlation coefficients for interpreting compressibility parameters on the basis of CPT tests.

scholarly journals PREDICTION OF GROUND CONDITION AND CONSOLIDATION PARAMETERS OF RECLAIMED GROUND WITH DREDGED CLAY

2008 ◽  
Vol 64 (1) ◽  
pp. 111-126
Author(s):  
Hideki YOSHIDA ◽  
Kazutoshi SAKATA ◽  
Masaaki KATAGIRI ◽  
Masaaki TERASHI ◽  
Shiro MURAKAWA
Keyword(s):  
Ground Condition ◽  
Consolidation Parameters

Back-calculation of consolidation parameters from field measurements at a reclamation site

2001 ◽  
Vol 38 (4) ◽  
pp. 755-769 ◽  
Author(s):  
Lai Fa Cao ◽  
Ming-Fang Chang ◽  
Cee Ing Teh ◽  
Yung Mook Na
Keyword(s):  
Pore Pressure ◽  
Land Reclamation ◽  
Ground Improvement ◽  
Field Measurements ◽  
Coefficient Of Consolidation ◽  
Vertical Drains ◽  
Undisturbed Samples ◽  
Back Calculation ◽  
Reclamation Project ◽  
Consolidation Parameters

A pilot test was carried out at a land reclamation project site to study the effect of vertical drains on the rate of consolidation of a marine clay deposit in Singapore. Theoretical and numerical analyses were conducted to interpret the field measurements of pore pressure and settlement, and consolidation parameters were back-calculated. The back-calculated preconsolidation pressure is similar to that obtained from the laboratory consolidation test on undisturbed samples, but the field-deduced compression index is generally larger than that measured in the laboratory. The coefficient of consolidation back-calculated from the settlement measurement is larger than that from the pore-pressure measurement. The coefficient of consolidation for horizontal flow obtained from the Rowe cell test, which is comparable to that back-calculated from the field settlement measurement, is recommended for the preliminary design of vertical drains without the need of considering the smear effect.Key words: clays, consolidation, ground improvement, numerical modelling and analysis, permeability, vertical drains.

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