Summary of Rock-Property Measurements for Hong Kong TuffSamples

Dobson, Patrick F. ; Nakagawa, Seiji

Lawrence Berkeley National Laboratory

关键词: Mechanical Properties;    Fractures;    58 Geosciences;    Porosity;    Grain Density;   

DOI  :  10.2172/885236
RP-ID  :  LBNL--58878
RP-ID  :  DE-AC02-05CH11231
RP-ID  :  885236

美国|英语

来源: UNT Digital Library

【 摘 要 】

A series of rock-property measurements was performed on a suite of rhyolitic tuff samples from the area above the Aberdeen Tunnel of Hong Kong. The goal of this study was to determine the mechanical properties of these samples after weathering. This report contains petrographic descriptions, porosity, bulk and grain density, as well as ultrasonic measurements, elastic modulii calculations, and rock-strength determinations. Variations in rock properties are related to alteration and the presence of fractures in the tuff. Granitic rocks located adjacent to the altered tuffs would be better candidates for underground excavations.