PHC究摘要PHC樁作為一種常見的地基處理方式，在工程中得到廣泛應(yīng)用。然而，由于部分地域存在沙土地層較厚、較深的情況，PHC樁的施工時常PHC樁穿越深厚密實(shí)砂層的可打性進(jìn)行分析和研究，具PHC樁PHC樁穿越砂層可打性的主要因素，如樁徑、PHC樁穿越砂層可打性的影響，并通研究結(jié)果表明，PHC樁穿越深厚密實(shí)砂層的可打性與樁徑、樁長和PHC樁穿越砂層的可打性。樁身材質(zhì)方面，CFST樁在穿越砂層時的可打性較好，而玻璃鋼樁的可打性較差。此外，施工工藝也對PHC樁穿越砂層的可打性產(chǎn)生一定影響，適當(dāng)?shù)臎_洗壓力和速度可以提高PHC樁穿越PHC樁穿越深厚密實(shí)砂層的可打性PHC樁在相應(yīng)地質(zhì)條件下的應(yīng)用具有一定的參考關(guān)鍵詞：PHCPHCpile,asacommongroundtreatmentmethod,hasbeenwidelyusedinengineering.However,duetothethickanddeepsandlayersinsomeareas,theconstructionofPHCpilemayencounterdifficultiesincrossing,whichseriouslyaffectstheconstructionprogressandmayevenleadtothequalityproblemsoftheproject.Therefore,itisofgreatengineeringsignificancetoanalyzeandstudythehammerabilityofPHCpilecrossingthickanddensesandlayers.Byreviewingtheexistingliterature,analyzingthephysicalandmechanicalpropertiesofsandlayersandtheconstructiontechnologyofPHCpiles,thispaperidentifiedthemainfactorsaffectingthehammerabilityofPHCpilescrossingsandlayers,suchaspilediameter,pilelength,pilematerial,andconstructiontechnology.Atthesametime,throughfieldexperiments,thispaperexploredtheinfluenceofdifferentfactorssuchaspilediameter,pilelength,andpilematerialonthehammerabilityofPHCpilescrossingsandlayers,anddrewsomevaluableconclusionsthroughtheanalysisoftheexperimentalresults.TheresearchresultsshowthatthehammerabilityofPHCpilescrossingthickanddensesandlayersiscloselyrelatedtofactorssuchaspilediameter,pilelength,andpilematerial.RelativelylargerpilediameterandappropriateextensionofpilelengthcanimprovethehammerabilityofPHCpilescrossingsandlayers.Intermsofpilematerials,CFSTpileshavebetterhammerabilitythanfiberglasspileswhencrossingsandlayers.Inaddition,theconstructiontechnologyalsohasacertainimpactonthehammerabilityofPHCpilescrossingsandlayers.AppropriateflushingpressureandvelocitycanimprovethehammerabilityofPHCpilescrossingsandlayers.Inconclusion,theresearchinthispaperhascertainvalueforexploringthehammerabilityofPHCpilescrossingthickanddensesandlayersandhascertainreferencesignificancefortheapplicationofPHCpilesundercorrespondinggeologicalconditions.Keywords:PHCpile;sandlayer;hammerability;fieldexperiment;constructiontechnology一、緒論研究背景與意義國內(nèi)外研究現(xiàn)狀研究內(nèi)容和方法二、砂土力學(xué)基礎(chǔ)砂土的定義和基本特征砂土的物理力學(xué)性質(zhì)砂土的宏觀特性三、PHC樁的施工工藝PHC樁的定義和基本特征PHC樁的施工步驟