| EPSRC Reference: |
GR/R04249/01 |
| Title: |
Experimental Validation of a New Ko Relationship For Overconsolidated Clays |
| Principal Investigator: |
Sivakumar, Dr V |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Sch Planning Architecture and Civil Eng |
| Organisation: |
Queen's University of Belfast |
| Scheme: |
Fast Stream |
| Starts: |
09 October 2000 |
Ends: |
08 October 2003 |
Value (£): |
62,088
|
| EPSRC Research Topic Classifications: |
|
| EPSRC Industrial Sector Classifications: |
| Construction |
No relevance to Underpinning Sectors |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
In the case of normally consolidated clays it is widely accepted that the value of the coefficient of earth pressure Konc is a constant and can be obtained with adequate accuracy from Jaky's relationship (Konc = 1-sinc). In over-consolidated clays, however, the situation is much more complicated since Kooc is related to the over-consolidation ratio and hence is extremely dependant on the previous loading history of the deposit. Until comparatively recently, natural clays, have by default been generally assumed to behave isotropically. Since 1995 the applicant has undertaken research which ha been directed towards examining the effect of assuming that natural soils behave cross-anisotropically. This work has met with some success. Recent work at Queen's University Belfast has established a method of estimating in situ stresses using easily measurable soils parameters, namely the negative pore water pressure in a laboratory sample p'k from a pressure plate apparatus and the ratio of cross anisotropic parameters J/3G* from standard undrained triaxial tests. The applicant has extended this work further and developed a framework which can model the pre-yield characteristics of natural clay. It is now suggested that the work can be further extended. This proposal will establish a mathematical relationship for Kooc in over-consolidated clays and proposes to carry out laboratory experiments in order to validate the mathematical approach.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
http://www.qub.ac.uk |