Recommendations for High Quality Field Sampling using the Gel-Push Type TR sampler

Abstract

The notes which follow have been prepared for use by engineers and are intended to provide information and guidance at key points to help improve the quality of the sampling operation. These procedures do not explain the detailed assembly or disassembly of the tool. It should be noted that disturbance to soil samples can occur at any point between the start of drilling and the start of testing in the laboratory, and engineers are advised to consider the evaluation of sample quality as an essential part of any testing campaign. This is most commonly assessed as a combination of the visual appearance of the samples and the comparison of in-situ and laboratory estimates of shear wave velocity.