静压桩极限承载力的时效性  

TIME EFFECT ON THE ULTIMATE BEARING CAPACITY OF STATIC PRESSED PILE

作　　者：张明义[1] 时伟[1] 王崇革[2] 彭林君 

机构地区：[1]青岛建筑工程学院土木工程学院,青岛266033 [2]山东科技大学,泰安271019

出　　处：《岩石力学与工程学报》2002年第A02期2601-2604,共4页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(50028403)

摘　　要：对静压桩进行了隔时复压试验和静载试验,静压桩的极限承载力随时间呈双曲线增长。静压桩时效性的机理主要是触变恢复效应及固结效应,桩的承载力的提高主要是因为桩侧摩阻力的提高,桩端阻力的贡献较小。根据静压桩的压桩力及复压力,便可推算桩的最终承载力,并给出了一种简便的计算方法。The re-pressed tests to statically pressed pile after different times, as well as the ordinary pile bearing capacity tests were performed. The ultimate bearing capacity of statically pressed pile increases with the time in hyperbolically. The mechanism of time effect can be interpreted as the effect of disturb-restore property and the effect of consolidation of the soil around the pile. The increase of the bearing capacity of pile mainly results from the increase of the pile side friction but in less degree from the pile tip resistance. According to the original construction force and re-pressed force, we can calculate the final bearing capacity of the pile. A simple calculating method is given in the paper.

关 键 词：基础工程 静压桩 时效性 复压 桩的承载能力 

分 类 号：TU473.11[建筑科学—结构工程]