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SUMMARY:Disturbance Analysis of Pressuremeter Test - Leo Liu\, CUED
DTSTART:20091204T163000Z
DTEND:20091204T173000Z
UID:TALK19406@talks.cam.ac.uk
CONTACT:Zelda Stuck
DESCRIPTION:Pressuremeter is a cylindrical probe that has an expandable fl
 exible membrane designed to apply a uniform pressure to the wall of a bore
 hole. Various pressuremeters are widely used to measure soil properties\, 
 such as stiffness\, strength\, horizontal pressure etc. It has been becomi
 ng a concern that the drilling process which conveys the pressuremeter ins
 trument to the certain depth would seriously affect the results of pressur
 emter tests.\n\nIn this talk a series of drilling disturbance will be iden
 tified. Strain Path Method and Cavity Expansion Theory will be applied to 
 investigate the magnitude of the drilling disturbance. There are two soil 
 models used in this project for pressuremeter tests in undrained and drain
 ed conditions. A newly-developed experimental instrument which measures th
 e pore pressure change at various positions on the instrument during the d
 rilling process will be also introduced so that the simulation results can
  compared with. \nOnce the disturbance effect is identified and quantified
 \, new analytical and numerical method to improve the measuring accuracy o
 f pressuremeter will be presented.\n\n
LOCATION:Engineering Department - LR6
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