海上大直径钻孔灌注桩施工技术

:100121986(2003)0420041203(,430074):,;,;,:;;;:TU47311+4:A1,8090,,,,;,,,,,,,,2,,4km,,1180m,,210m,2540m,13000kN,,,+3100m;,-1150m;,310m;,,,,,,,,,1,,,+4100m,-6100m,,,32h;h1;h2;h3;H,,12:2002212218:(1951),,,,,(),11431420038COALGEOLOGY&EXPLORATION©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:,,3114150m,45kPa,,,,h,hh,,,,,h112115m:=+h312,h1,,;h1,h1,,,,,,h1,h1415515m,h30.81.2m31350a314H:H=h++h1-h3,H10m,,44,1190m,5mm,4,2,,34,,5,31;2;3;4;5;641;2;3;4;5;6;7;83PNL;9;10;11;12,,6080kg:11101112kgPL,2530s,1620mLPmin,,,,,,,,2,,,,,,,,,,,,,,,,,,,,,,6080kgPm3,,,,2431©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.6611600t300t,,,,:600t,4cm,3,,,3m,,,2,:300t140t,,,,,,61215517cm,3625,20,12mm,,,,,10m,,,2,,16280mm,,,61311161196,0155,1920cm,15cm110h56,:,,;,,,24cm;,56,,7a1,,,,,,b1,,,,c1,,344:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:100121986(2003)0420044202,,(,221006):,;:;;;:P64114:A1,;,,,660m3Ph,,2211,,,,,,,,,,,,,,,,-65m211660m3Ph;,,,(),,,,-800m34225250m3Ph212,,,,,,,,,,::2002210228:(1962),,,,1,,,d1,,,,,ThetechnologyoflargediameterboredpierconstructionontheseaGUYuan2wei(ChinaUniversityofGeo2sciences,Wuhan430074,China)Abstract:Basedonthetheoriesofpressureequilibrium,thispaperputsforwardthemethodofdeterminingoptimaldepthofsteelprotectivecase.Combiningwiththeresultsofindoorexperiment,thecompositionandsupportofseawaterdrillingfluidareraised.Combiningwiththeengineering,thereasonablelayoutofdrillingfluidcirculationsystemontheseaandtheunderwaterferroconcretearesummarized.Theabove2mentionedtech2niqueshavetheactualapplicationonoceanfoundationintheport,wharfandbridge.Keywords:protectingtubeembedding;circulationsystemofdrillingfluid;seawaterdrillingfluid;ferroconcretemeansonthesea44COALGEOLOGY&EXPLORATIONVol.31No.4Aug.2003©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.