01785nas|a2200241 i 450000500170000000800410001703500150005810000210007324500720009426000520016630000150021849000270023350001430026050200580040352007730046165000160123470000360125070000450128670000420133171000460137381000590141985600650147820260818113655.0121095s1979    th uu m rtt  00|  a1eng d  a.b102770791 aZubair, Mohammad10aField observations on installation of displacement type sand drains  aBangkok :bAsian Institute of Technology,c1979  avi, 152 p.1 aThesis ;vno. GT-78-20  aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology  aThesis (M.Eng.) - Asian Institute of Technology, 1979  aThis study investigates the effects of installing driven-mendrel displacement type sand drains on soft Bangkok clay. These effects were studied on pore water pressure, the lateral subsoil movements, the heave  and horizontal movements of the ground surface. A total no of 25 sand drains, 30 cm in diameter and about 6 m. in length, were installed at a contre to centre spacing of 1.2 m. Before  the installation the test site was equipped with piezometers, inclinometers and wooden stakes. The results indicated high pore pressures and large heave of the ground surface. After the installation the excess pore pressures were found to dissipate rapidly accompanied by a gradual settlement of the heaved ground surface and slow recovery in the subsoil lateral movements. 0aSand drains1 aAkagi, Toshinobu, eChairperson1 aHolmberg, Soren, eExamination Committee1 aBrenner, R.P.,eExamination Committee2 aGovernment of Canada, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. GT-78-20  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B22263