TY - GEN
T1 - Effect of water content on the abrasivity of granular soils in soft ground tunneling applications
AU - Gharahbagh, Ehsan Alavi
AU - Qiu, Tong
AU - Rostami, Jamal
PY - 2014
Y1 - 2014
N2 - This paper presents an experimental study of tool wear and abrasivity of granular soils using a testing system specifically designed for the evaluation of wear in soft ground tunneling applications. In the testing system, a propeller that is fitted with steel covers with different hardness is rotated at 60 rpm in granular soil samples in a chamber under ambient pressures of up to 10 bar. The developed system can quantitatively assess the abrasive characteristics of soils through the measurement of weight loss on the special covers of the propeller, accounting for soil gradation, mineral composition, sphericity and roundness, water content, and tool hardness. Preliminary test results indicate that water content has significant impact on tool wear and soil abrasion. For the tests conducted, it is observed that tool wear first increases with water content until the water content reaches about 7-10%; beyond this range, higher water content reduces tool wear.
AB - This paper presents an experimental study of tool wear and abrasivity of granular soils using a testing system specifically designed for the evaluation of wear in soft ground tunneling applications. In the testing system, a propeller that is fitted with steel covers with different hardness is rotated at 60 rpm in granular soil samples in a chamber under ambient pressures of up to 10 bar. The developed system can quantitatively assess the abrasive characteristics of soils through the measurement of weight loss on the special covers of the propeller, accounting for soil gradation, mineral composition, sphericity and roundness, water content, and tool hardness. Preliminary test results indicate that water content has significant impact on tool wear and soil abrasion. For the tests conducted, it is observed that tool wear first increases with water content until the water content reaches about 7-10%; beyond this range, higher water content reduces tool wear.
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U2 - 10.1061/9780784413272.046
DO - 10.1061/9780784413272.046
M3 - Conference contribution
AN - SCOPUS:84906841631
SN - 9780784413272
T3 - Geotechnical Special Publication
SP - 485
EP - 494
BT - Geo-Congress 2014 Technical Papers
PB - American Society of Civil Engineers (ASCE)
T2 - 2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014
Y2 - 23 February 2014 through 26 February 2014
ER -