原文传递
Near Surface Laboratory Testing Protocol Development.
| 题名： | Near Surface Laboratory Testing Protocol Development. |
| 作者： | Berry, W. W.; Cunningham, A. L.; Winters, K. E.; Taylor, O. S.; Rowland, W. R.; Antwine, M. D. |
| 关键词： | Soil mechanics, Geotechnical engineering, Laboratory procedures, Test and evaluation, Compression, Shear tests, Test methods, Computer programs, Geotechnical testing, Physical experimentation, Inundation testing, Non plastic soils, Scientific apparatus and instruments, Soil profiles, Soil testing, Near-surface environment, Unit (ultrasonic near-surface inundation testing), Unit device, Ud (unconfined drained), Triaxial compression tests, Torsional ring shear tests, Hollow cylinder tests, Ud self-supporting tests, Simple shear tests |
| 摘要： | Geotechnical laboratory testing focuses on the behavior of soils subjected to confining pressures in excess of those experienced within the near-surface environment (the upper 1 m of the soil profile). Such standardized protocols have set-up stresses, e.g., seating loads and stabilization vacuum pressures, in excess of the failure strength observed at low confinement. Therefore, effective stress principles are often used to infer low confinement behavior within a laboratory setting. Neither the standardized protocols nor the use of effective stress principles encapsulate the near-surface environment or the true behavior. The purpose of this technical report is to provide laboratory-testing protocols for physical experimentation within the near-surface environment. For standardized testing equipment, e.g., triaxial and simple shear devices, existing protocols have been modified. New testing protocols have been designed for experimental equipment, e.g., the Ultrasonic Near-Surface Inundation Testing device (UNIT) or for unconfined drained self-supporting testing (UD). The protocols presented herein are for commercial and prototype equipment used in the ERDC Geotechnical and Structures Laboratory (GSL) and are readily adaptable to other equipment manufacturers' devices. |
| 报告类型： | 科技报告 |
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