 | Field Records Geotechnical Assessments are only as good as the data collected. In order to ascertain the relevant parameters required by the computer modelling software, QuarryDesign have invested in portable test equipment to provide more accurate estimates of insitu strengths, density and friction angles. Whilst these portable testing techniques are not asaccurate as taking bulk samples for laboratory testing, they areconsiderably less expensive and whereas laboratory testing is usually only performed on a limited number of samples, by using portable |
test equipment, we are able to cover more of the quarry's face or tip's surface. The parameters obtained are still 'estimates' but theyare more accurate than using 'standard' material properties frompublished sources. |  | Detailed field mapping includes the recording of geological features (such as potentially weak intra-formational layers that a failure could be located within) and discontinuity data to assess the kinematical potential for failure to occur. Field estimates of Joint Compressive Strength, (JCS) Joint Roughness Coefficient (JRC) and Geological Strength Index (GSI) are also taken. |
In addition to the above 'technical' data collection we also make a visual inspection and produce a photographic and writen record of the condition of all structures present on Site. l. |  |
| Computer Modelling Inorder to produce appropriate Factors of Safety and to assess theprobability of failure, QuarryDesign has invested in a suite ofgeotechnical software from RocScience and GeoSlope International. | |
 |
Screen shots of geotechnical software in use |  | Kinematical Analysis (above) Summary Planar Failure Analysis (left) Detailed Planar Failure Analysis (below) |
 |
Rockfall Analysis Slope Stability Analysis Face Height Analysis |
|
