Sample Disturbance in Soft and Sensitive Clays: Analysis and Assessment |
| |
Authors: | K Nagendra Prasad S Triveni T Schanz Late T S Nagaraj |
| |
Institution: |
a Department of Civil Engineering, SVU College of Engineering, Tirupathi, India
b Soil Mechanics Division, Bauhaus - University, Weimar, Germany
c Formerly of RV. College of Engineering, Bangalore, India
d Adjunct Professor, University of Massachusetts, Amherst, MA, USA |
| |
Abstract: | Despite the sophisticated methods employed to obtain high quality samples, they are prone to disturbance, due to stress release, let apart, due to sampling tools and techniques adopted. Critical reappraisal of different methods suggest that any method of sample quality assessment involving strength and deformation parameters would enable easier implementation and correct other engineering parameters for estimated sample disturbance. In this technical paper, sample disturbance index, using merely the slopes of compression paths, (representing mechanical response), in the pre- and post-yield stress regimes under odeometric loading conditions is proposed. This method is based on single oedometer test results on samples of unknown degrees of disturbance during sampling and handling. The unique feature of this approach is that the ideal rigid plastic material behavior is taken as reference. This eliminates the need for any additional experimental data or any calculations from the relationships formulated with any set of assumptions. |
| |
Keywords: | clays odeometer testing sample disturbance sensitive soils soft clays |
本文献已被 InformaWorld 等数据库收录! |
|