PHC管桩土塞效应浅析
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摘要
引入太沙基(TerzaghiK)提出的地基破坏时形成三角楔体作用的理论,分析了开口管桩土塞的形成过程和作用机理,解释了开口桩土塞面高于原土层面的现象,并指出了以往在研究土塞时,引入土塞率研究土塞效应的不足之处。提出了桩径、管壁厚度与土塞效应的较为完整的相互作用的关系,为研究土塞对开口管桩的沉桩特征和承载力影响提供了新的思路和方法。
The forming process and mechanism of the plug of an openend pipe pile are analyzed based on the theory of forming trangular wedge at the failure of a foundation by Terzaghi K.It is explained that the phenomenon of the plug surface of the open-end pile being higher than that of the original soil layer;and it is also pointed out the defect of plug effect researched by plug rate when the plug was studied previously.A more complete relationship among the pile diameter,the thickeness of pipe wall and the plug effect is proposed,which provides a new method for researching the effect of the plug on pile-sinking and bearing capacity of the open-end pipe pile.
The forming process and mechanism of the plug of an openend pipe pile are analyzed based on the theory of forming trangular wedge at the failure of a foundation by Terzaghi K.It is explained that the phenomenon of the plug surface of the open-end pile being higher than that of the original soil layer;and it is also pointed out the defect of plug effect researched by plug rate when the plug was studied previously.A more complete relationship among the pile diameter,the thickeness of pipe wall and the plug effect is proposed,which provides a new method for researching the effect of the plug on pile-sinking and bearing capacity of the open-end pipe pile.
引文
1 俞振全.钢管桩的设计与施工.北京:地震出版社,1993
2 NishidaY,sekignchiH,MatsumotoT.DrivabilityofSteelPipePiles intoDiatomaceousMudstoneintheConstructionofNotojima Bridge.In:OnPenetrabilityandDrivabilityofPiles.SanFrancisoo:1985,1:187～191
3 MotoyamaS,TsujiH,MiyabayashiH.LoadingTestsonSteelPipe PilesoftheKanasaiInternationalAirportAccessBridge,Tsuchi to Kiso,1988,36(7):23～28
2 NishidaY,sekignchiH,MatsumotoT.DrivabilityofSteelPipePiles intoDiatomaceousMudstoneintheConstructionofNotojima Bridge.In:OnPenetrabilityandDrivabilityofPiles.SanFrancisoo:1985,1:187～191
3 MotoyamaS,TsujiH,MiyabayashiH.LoadingTestsonSteelPipe PilesoftheKanasaiInternationalAirportAccessBridge,Tsuchi to Kiso,1988,36(7):23～28
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