03085cam|a2200253 i 450000500170000000800410001703500150005810000180007324500710009126000520016230000110021449000270022550001450025250200580039752020130045565000160246870000400248470000360252470000500256070000480261071000490265881000590270785600650276620260818222800.0261198s1990    th      r    0000|00eng d  a.b106448781 aYau, Kwok Fai10aStress paths below embankments and excavations in Bangkok subsoils  aBangkok :bAsian Institute of Technology,c1990  a117 p.1 aThesis ;vno. GT-89-15  aA thesis submitted in partial fulfillment of the requirements for the degree of  Master of Engineering, School of Engineering and Technology  aThesis (M.Eng.) - Asian Institute of Technology, 1990  aThis thesis illustrates stress path studies on soft clays under embankments  and in excavations. The stress path followed by a soil element depends on which  zone it is located, and the geometry of the embankments or excavations. Along  the centerline underneath the embankment, the total stress path followed by a  soil element in the weathered crust is much of lesser slope than the Ko-line in  the (q {u2022} ,p) plot. The total stress path for a soil element in the very soft clay  layer is above the Ko-line in the (q {u2022} ,p) plot and deviates from the standard  triaxial stress path used in conventional tests. The total stress path followed  by a soil element in the soft to medium stiff clay layer followed by a soil element  is along the Ko-line. For points outside the embankments, the total stress paths  are shown as the extension loading type. When the ratio of the base width of  the embankment to the soft soil layer thiclrness is greater than 2, the total  stress paths followed by a soil element in the soft clay layer is along the Ko  line. The one-dimensional loading condition can be used for the long term  settlement analysis. In the case of excavations, the total stress paths followed  by a soil element in the very soft clay layer along the centerline describes an  unloading extension state. It is found that the triaxial test can not simulate  the stress paths for points under the slope excavation. The triaxial unloading  extension test can simulate the stress paths for points under the vertical  excavation. Adjacent to the vertical surface of the excavation, the stress path  followed by a soil element can be simulated by the triaxial unloading compression  test. In view of the stress path followed by a soil element depends on which  zone it is located, the finite element analysis should incorporate the soil  parameters as described from the appropriate laboratory or field test which closely  simulates the stress path followed by the soil under the field condition. 0aEmbankments1 aBalasubramaniam, A.S.,eChairperson1 aHonjo, Yusuke, eC0-Chairperson1 aIndraratna, Buddhima, eExamination Committee1 aRantucci, Giovanni, eExamination Committee2 aThe Government of Korea, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. GT-89-15  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B18400