03592nas|a2200421 i 4500 20260818112807.0 160801s2001 th u m rtt 00| a1eng d .b11832083 AIT Thesis no. GE-00-16 Walairat Bunthai Evaluation of recharge and ground improvement using prefabricated vertical drains (PVD) for soft Bangkok clay Bangkok : Asian Institute of Technology, 2001 148 leaves Thesis ; no. GE-00-16 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 2001 Laboratory tests were conducted to investigate the effects of confinement at different pressures on discharge capacity of prefabricated vertical drain (PVD). Two types of PVDS were tested, namely: Mebra (MD7667A) and CN (Al). The test results indicated Mebra (MD7667 A) consistently yielded higher discharge capacity than CN (Al) because its filter jacket of Mebra (MD7667A) has higher tensile strength than CN (Al). Thus, the tensile strength of filter jacket significantly affected the discharge capacity of PVD. Moreover, the higher water contents of remolded clay confinement may also cause more deformation in the surrounding clay and may caused bending in the PVD. In the case, the PVD bending may have contributed fmther to the reduction of discharge capacity. For the settlements predicted of Reference Section at the Second Bangkok International Airport (SBIA), the settlements predicted by the PVD-SD software Version 2.3 and Asaoka's method were in good agreement with the observed data. However, the PVD-SD software was found to be quite useful are for the case of multi-layer soils having different physical prope1ties for each laye:r improvement with PVD. In addition, the back-calculated values of discharge capacity, %v, using the method of Asaoka agreed within the range of other investigators. Finally, the concept of removing piezometric level drawdown using PVDs was also observed in the filed test at the AIT campus. From the observed data, the PVD was effective in recharging the ground to remove the piezometric level drawdown up to the depth of PVD installation. Vertical drains Clay Thailand Bangkok Testing Bergado, Dennes T., Chairperson Balasubramaniam, A.S., Examination Committee Miura, Kinya, Examination Committee Mahanakorn University of Technology, Scholarship Donor Asian Institute of Technology. Thesis ; no. GE-00-16 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08174 .b11832083 mnait u 240407 0 010816 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120716575 CREATED : 2000-03-19 RECORD # : i12253364 LPATRON : 1018000 LCHKIN : 2006-03-12 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 8 TOT RENEW : 2 Barcode : 30050120382287 CREATED : 2000-03-19 RECORD # : i12253376 LPATRON : 1026557 LCHKIN : 2017-01-03 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 7 TOT RENEW : 4 Barcode : 30050160054150 CREATED : 2016-05-23 RECORD # : i12984930 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 41167 41167 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. GE-00-16 30050120716575 2026-08-18 11:28:07 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. GE-00-16 30050120382287 2026-08-18 11:28:07 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. GE-00-16 30050160054150 2026-08-18 11:28:07 1 2026-08-18 40