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035 _a.b11815681
099 9 _aAIT Thesis no.GE-99-10
100 0 _aChairat Supachawarote
245 1 0 _aBoiling type failure in cofferdam built in river for bridge construction
260 _aBangkok :
_bAsian Institute of Technology,
_c2000
300 _a154 leaves
490 1 _aThesis ;
_vno. GE-99-10
500 _aA thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Civil Engineering
520 _aThis study aims to investigate the cause of boiling type of failure in cofferdam and to propose a rational method for the safety design of cofferdam regarding the threedimensional effect of seepage on the occurrence of boiling type of failure. An actual failure of cofferdam due to the boiling induced by seepage force during renovation of the Daiichi-Shinkawa Bridge is introduced. The cofferdam was designed in accordance with the "Directions for Road and Earthworks" of the Japanese Road Association (JRA). Two dimensional seepage considerations were assumed in the analysis and the stipulated minimum factor of safety is 1.5. The cause of the failure is investigated with a series of parametric study using finite element analysis with 2-D plane condition as well as axisymmetric and 3-D conditions. In addition, the parametric study is extended in 3-D condition to investigate the effect of three-dimensional shape of the cofferdam, excavation depth, depth of impermeable base layer, excavation area, anisotropic permeability. From these series of calculation, some features of the relationships of seepage force with the influencing factors and some charts are presented for a simple estimation of the seepage force regarding the three-dimensional effect of seepage force on the stability of cofferdam.
502 _aThesis (M.Eng.) - Asian Institute of Technology
650 1 0 _aCoffer-dams
650 1 0 _aBridges
_xFoundations and piers
700 1 _aMiura, Kinya,
_eChairperson
700 1 _aBalasubramaniam, A.S.,
_eExamination Committee
700 0 _aNoppadol Phien-Wej,
_eExamination Committee
700 1 _aGuey, Lin Der,
_eExamination committee
710 2 _aAsian Institute of Technology Partial Scholarship,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. GE-99-10
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B06564
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