TY - JOUR ID - 652 TI - Unit skin friction from the extended dynamic cone penetrometer (EDCP) test supplemented by measurement of torque within testing wells JO - Iranian Journal of Science and Technology Transactions of Civil Engineering JA - IJSTC LA - en SN - 2228-6160 Y1 - 2012 PY - 2012 VL - 36 IS - 1 SP - 115 EP - 119 KW - Penetration KW - driven piles KW - rod friction KW - geotechnical properties KW - coarse grained KW - fine grained DO - 10.22099/ijstc.2012.652 N2 - The Extended Dynamic Cone Penetration (EDCP) test supplemented by measurement of torque (EDCP-T) may be used to obtain a direct measurement of unit skin friction (fs) between the cone section and the surrounding soil. The test is performed after completion of the EDCP test. In order to perform the EDCP-T, the EDCP device is rotated after driving the rod and maximum torque is measured using a calibrated torque wrench that is connected to the top of the EDCP. The EDCP-T test results at 3 sites are presented. The results show that the unit skin friction values obtained from the EDCP-T generally correlate well with normalized blows for 30 cm penetration of the EDCP tip (NEDCP(n)). The results may be valuable for preliminary estimation of unit skin friction of the driven piles.            UR - https://ijstc.shirazu.ac.ir/article_652.html L1 - https://ijstc.shirazu.ac.ir/article_652_04d3c4626d9b88c5f7a4ca079f96b46c.pdf ER -