海上复合桩钢管打设施工技术

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1、桥梁建设2014年第44卷第2期(总第225期)BridgeConstruction，Vo1．44，No．2，2014(TotallyNo．225)文章编号：1003—4722(2014)02—0112—06海上复合桩钢管打设施工技术张海燕(中铁大桥局集团第五工程有限公司，江西九江332001)摘要：港珠澳大桥浅水区非通航孔桥采用85m连续组合梁桥形式，全长5440m，共64孔，每墩均采用6根复合桩钢管，共372根，低墩区与高墩区桩径分别为2．0m和2．2m，连同替打段桩长总长超过60m。为满足复合桩钢管在涌浪较大海域施工精度要求，经比

2、选采用整体式导向架法打设复合桩钢管。首先将导向架运至墩位处初定位，通过导向架调位系统进行二次定位，利用APE400B液压打桩锤插打4根定位桩；再将导向架固定在定位桩上，利用导向架微调装置进行第3次定位后，插打复合桩钢管到设计标高。施工中通过液压系统、导向装置、RTK定位测量及3次定位等技术确保了复合桩钢管的平面位置和倾斜度，复合桩钢管打设施工精度均满足该工程技术规范要求。关键词：连续梁桥；桩基础；复合桩钢管；整体式导向架；定位；打设；桥梁施工中图分类号：U443．15；U445．4文献标志码：AConstructionTechnique

3、sforSettingandDrivingCompositePileSteelPipesoverSeaZHANGHai—yan(The5thEngineeringCo．，Ltd．，ChinaRailwayMajorBridgeEngineeringGroup，Jiujiang332001，China)Abstract：Thenon—navigablespanbridgeoftheHongKong—Zhuhai—MacaoBridgeovertheshallowwaterareaisa85一mspancontinuouscomposite

4、girderbridgethatistotally5440mlongandhas64spans．Foreachpierofthebridge，6compositepilesteelpipesareprovidedandtherearealtogether372steelpipesforthewholebridge．Thediametersofthesteelpipesintheareasofthelowpiersandhighpiersarerespectively2．0mand2．2mandinadditiontothelengtho

5、fthedrivingsection，thetotallengthofasteelpipeisgreaterthan60m．Tomeettheprecisionre—quirementforconstructionofthesteelpipesoverthesurgingsea，itwasdeterminedthroughcomparisonthattheintegralguideframemethodwastobeusedtosetanddrivethesteelpipes．Firstly，theguideframewastransp

6、ortedtothepiersiteandwasinitiallypositioned．TheframeW3Spositionedforthesecondtime，usingtheadjustingsystemoftheframeandatthistime，4positioningpilesweresetanddrivenbytheAPE400Bhydraulicpilehammer．Thentheguideframewasfixedonthepositioningpiles，waspositionedforthethirdtime，u

7、singthefineadjus—ringdeviceoftheframe．Aftertheguideframewaspositioned，thesteelpipesweresetanddriventothedesignedelevation．Intheconstruction，theplanelocationsandinclinationofthesteelpipeswereensuredbythetechniquesofthehydraulicsystem，guidedevices，RTKpositioningsurveyandth

8、ethreetimesofpositioningoftheguideframeandfinallytheconstructionprecisionofsettinganddrivingthesteelpip