摘要
简单介绍了沉管灌注筒桩及其沉桩施工工艺;假定沉管灌注筒桩沉桩时的挤土过程,是一个有初始孔径的圆柱形孔扩张过程,初始孔径等于筒桩内径,最终孔径等于筒桩外径,应用圆孔扩张理论进行弹塑性分析,得出应力场、塑性区半径、超静孔隙水压力等解析表达式,并通过与普通沉管灌注桩或预制实心桩挤土效应进行了比较,得出筒桩施工挤土效应远远小于普通沉管灌注桩或预制实心桩的结论,从施工挤土效应这个侧面揭示沉管灌注筒桩的优越性。
Cast-in-place tubular pile and its driving technology ware introduced; On basis of the hypothesis that the pile driving process is regarded as cavity expansion which initial radius equals to pile internal radius and ultimate radius e-quals to pile external radius, by making use of cylindrical cavity expansion theory, the formulas of the stresses, plastic zone radius, and excess pore pressure were given; and by comparison with general piles, the conclusion is obtained that driving effect of cast-in-place tubular pile is strikingly weaker than ordinary ones, then its superiority in respect of disturbing soil is revealed.
出处
《科技通报》
2005年第2期185-188,共4页
Bulletin of Science and Technology
基金
宁波市科技计划资助项目(001102016)
关键词
土木建筑工程施工
筒桩
挤土效应
圆孔扩张
engineering construct of civil construction
driven cast-in-place tubular pile
pile driving effect
cylindrical cavity expansion
