考虑次固结的吹填土单桩负摩阻力计算研究  

Study on the Calculation Method of Negative Frictional Resistance on the Side of Monopile Piles with Blown Fill Considering the Time-varying Effect of Subconsolidation

作　　者：刘洋 胡慧峰 毛雨薇 俞嘉辉 周东杰 LIU Yang;HU Hui-feng;MAO Yu-wei;YU Jia-hui;ZHOU Dong-jie(Ningbo Electric Power Design Institute Co.,Ltd.,Ningbo 315211,China)

机构地区：[1]宁波市电力设计院有限公司,宁波315211

出　　处：《价值工程》2022年第2期154-156,共3页Value Engineering

摘　　要：本研究主要目的在于提供一种考虑场地吹填土次固结时变效应的吹填土单桩桩侧桩侧负摩阻力计算方法,该方法通过对场地吹填土进行一维场地吹填土次固结试验,获得孔隙比-时间对数(e-lgt)曲线,利用曲线拟合获得场地吹填土次固结系数及相应计算参数,计算任意时刻的场地吹填土次固结时变沉降量,获得桩侧桩侧负摩阻力中性点位置,并进一步计算得到总的桩侧桩侧负摩阻力。该研究成果可为快速成陆的吹填场地基桩工程设计和施工提供参考。The main objective of this paper is to provide a method for calculating the negative friction resistance of pile side of a single pile in a blowfill considering the effect of subconsolidation,which obtains the pore ratio-logarithm of time(e-lgt)curve by conducting a one-dimensional subconsolidation test on the site blowfill,uses curve fitting to obtain the subconsolidation coefficient and the corresponding calculation parameters,calculates the subconsolidation settlement at any moment,obtains the location of the neutral point of the negative friction resistance of the pile side,and further The total pile-side negative friction resistance is calculated.The research results can be used as a reference for the design and construction of the foundation pile project of the rapid land formation blowing site.

关 键 词：次固结 吹填场地 桩侧负摩阻力 计算方法 

分 类 号：TU432[建筑科学—岩土工程]