Development for the Optional Use of Circular Core Tubes with the High Shear Stress Flume

ROBERTS, JESSE D. ; JEPSEN, RICHARD A.

Sandia National Laboratories

关键词: Sediments;    Samplers;    Sampling;    Rectangular Configuration;    Circular Configuration;   

DOI  :  10.2172/780295
RP-ID  :  SAND2001-0424
RP-ID  :  AC04-94AL85000
RP-ID  :  780295

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this study, the erosion rates of four reconstituted sediments in both rectangular and circular sample tubes have been determined as a function of density and shear stress by means of a high shear stress sediment erosion flume at Sandia National Laboratories. This was done to determine if circular cores used in field sampling would provide the same results found using the existing technology of rectangular cores. Two samples were natural, cohesive sediments retrieved from different sites in the Boston Harbor identified as Open Cell and Mid Channel. The other two sediments were medium and coarse grain, non-cohesive quartz sediments. For each sediment type, erosion tests were performed with both rectangular and circular core tubes. For all cores, bulk density was determined as a function of depth and consolidation time. Sediments were eroded to determine erosion rates as a function of density and shear stress for both types of core tubes used. No measurable difference was found between the two core types.