滨海复杂地层PHC管桩和灌注桩承载性能对比研究

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Abstract：Basedona foundational engineringprojectinthecoastalareaofQingdao，thisstudyconducts fieldtests onthe verticalcompresive static loadof single piles forbothPHC pipe piles and cast-in-place piles.Taking intoaccount the complexgeologicalconditionsof theproject，the study analyzes the verticalbearing characteristicsof these two pile types foundationsandevaluates theapplicabilityof theexponential modelandhyperbolicmodelinpredictingtheultimatevertical compressivebearing capacityof single testpiles.TheresearchresultsshowthatPHCpipe pileshave higherbearingcapacity and more stable performance，making them more suitable forcomplex coastal geological conditions.Incontrast， the bearing performanceofcast-in-placepilesissignificantlyinfluencedbypilelengthandthelength-to-diameterratio.Employing the exponential model and hyperbolic model respectively to predict the curves for PHC pipe piles and cast-in-place piles， it is found that theexponential model is more acurate in predictingtheultimateverticalcompressivebearingcapacityof PHC pipe piles，whilethehyperbolic model is more accurate forcast-in-place piles.Theresearch results provide reference and guidance for optimizing the design and construction of pile foundations in coastal areas ofQingdao.

Keywords：PHCpipepile;cast-in-placepile;bearingcharacteristics;singlepilevertical staticloadtest;ultimatebearing capacity prediction of single pile

青岛位于中国山东省东部，地理位置优越，经济发展迅速。（剩余10783字）