基于Geddes公式计算新型带肋预应力管桩的沉降  

Settlement calculation of new prestressed pipe-pile with rib based on Geddes' formula

作　　者：熊厚仁[1,2] 牛志荣[1] 蒋元海[1] 吴祥松[1] 杨建永[2] 

机构地区：[1]嘉兴学院建筑工程学院,浙江嘉兴314001 [2]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《岩土力学》2011年第12期3630-3636,共7页Rock and Soil Mechanics

基　　金：建设部科技项目(No.2008-k1-18);江西省研究生创新资金资助项目(No.YC08A079)

摘　　要：在Geddes应力公式的基础上,对新型带肋预应力管桩的环状凸肋产生的影响做了假设:环状凸肋的受力可等效为对其下部土的挤密作用,即产生附加应力;为了方便计算,把该种附加应力简化沿环状凸肋两倍下部长度矩形分布的桩侧摩阻力,并推导出了适合新型带肋预应力管桩单桩沉降的计算公式;然后用Matlab软件进行编程计算。计算结果与现场试验结果相近,可做为工程估算。Based on Geddes＇ stress formula,the hypotheses are designed aiming at the influence of annular flange rib of new prestressed pipe-pile with rib： The force of annular flange rib can be equivalent to the compaction to its lower part soil,i.e.additional stress;for the convenience of calculation,this kind of additional stress is simplified to the rectangular distribution skin friction resistance along double length of the lower part of annular flange rib;and the formula for calculating the settlement suitable for the single pile of new prestressed pipe-pile with rib is given;then Matlab software is used to program calculations.The calculated results are consistent with the experimental test results;so they can be used to estimate for the project.

关 键 词：新型带肋预应力管桩 沉降 Geddes应力公式 环状凸肋 摩阻力 

分 类 号：TU473[建筑科学—结构工程]