深水桩基工作平台的设计与施工

··2011-04-23300222、。。U455．551A1009-4539201107-0082-05TheDesignandConstructionforDeepWaterPileFoundationGuoGuangChinaRailway18thBureauGroupCo．Ltd．Tianjin300459ChinaAbstractWiththedevelopmentofthetechnologyforbridgeengineeringwearebuildingmoreandmoresea-crossingandwater-crossingbridgesinchina．Asisknowntomostpeopletheconstructionofthedeepwaterpilingfoundationisakeytechnologytothelongspanbridgesandthedesignandconstructionofthepilingworkingplatformisofmostdifficultyandwoulddirectlydeterminethesuccessoftheconstruction．Keywordsdeepwaterpilingsteelpipepileplatformstability1440m－32．7×3+48．7+2×80+48．7+24．7×3m、、、。64、5、6122．0m45m66m、、21m35m4m/s。1。2。。。。33．1l0=35m。160t28RAILWAYCONSTRUCTIONTECHNOLOGY20117··60t。=2200mmδ=14mm30cm28mm。=1000mmδ=10mm30cm20mm。13．2、G220=973．27×35×78．5=267406gG100=317．14×35×78．5=87131gA220=πD2－d2/4=973．27cm2A100=πD2－d2/4=317．14cm2r220=D4－d40．5/4=222．82+22020．5/4=78．28cmr100=D4－d40．5/4=1022+10020．5/4=35．71cmλ220=l/r=35/0．7827=44．7＜λ=120λ100=l/r=35/0．3571=98＜λ=1202200mm=0．871000mm=0．52。δ220=1600kN+267．4kN+280kN/973．3×0．87=25．36MPa＜δ170MPaδ100=600kN+87．13kN+80kN/317．14×0．52=46．5MPa＜δ170MPa160tδ100=1600kN+973．3kN+280kN/317．14×0．52=119．3MPa＜δ170MPa。、160t。3．3、、、、。1。30cm28mm。A=π225．62－2202/4=1958．9cm2k=0．99m38RAILWAYCONSTRUCTIONTECHNOLOGY20117··F=π×2．256×9×15+0．3×160+0．9×1959×10－4－267．4－280=1454．2kN。1/mτ/kPa①415②150③1140④1160⑤34000160t9m2m。3．4、。p=kAγv2/2g1/3。K=1．33A220=2．228×35=78m2A100=1．02×35=35．7m2γ=10kN/sv=4m/sg=10m/s2。P=1．33×35．7×10×4/2/10=379．8kNI220=πD4－d4/64=5963729cm4I100=πD4－d4/64=404433cm4W220=I220/r=5963729/111．4=53534．4cm3W100=I100/r=404433/50=8088．7cm3δ220=829．9×35×2/3×103/0．87×53534．4×10－6=415．8MPa。＞δ170MPa。δ100=379．8×35×2/3×103/0．52×8088．7×10－6=2107．4MPa。＞δ170MPa。、4m/s。1．4m/s2．56m/s。3．54、5、635m4m/sA=4×35．7+3×78=376．8m2p=1．33×376．8×4×4/2/10=4009．2kN=250．6v2。G=730tF220=800kN2．0F100=300kN2．0M=4009．2×35×2/3=93548kN·mM=7300×17．2/2=62952kN·mM100=30×17．2+12．9+8．6+4．3+0×4=51600kN·mM220=800×315．05+10．75+6．45+2．154=82560kN·mM+M100+M220=196752kN·mk=19652/93548=2．115m/sk=1．35。6m/sk=0．93。2．05m/s。。44．118．1m×18．2m1．0m1．0cm20。。2200t。9m。、100cm100mm×150mm×10mm8。、X、Y。48RAILWAYCONSTRUCTIONTECHNOLOGY20117··GPS。。5m50cm。30cm1%。、。2。24．2。。I40I168mm。。15m。33。34．3。。3cm。1．2cmA32．3m。1．2cm、30cm58RAILWAYCONSTRUCTIONTECHNOLOGY20117··1．2cm、15cm1。8～10m。1m。U。1。2。3。4。5。5m。6I40。51、、、、。2檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪。81225MPa。6。6/mm16－182022252832/MPa1015202530355．320MPa6Ⅰ67。76/MPa/mm125580652255807532556070425570655255557562556570JGJ107－2003《》。620min。、。1JGJ107－2003S2Q/YJ16－2003S68RAILWAYCONSTRUCTIONTECHNOLOGY20117