【作者】 张怀静； 潘旦光；

【Author】 Zhang Huai-jin~1 Pan Dan-guang~2 (1 Beijing Institute of Civil Engineering and Architecture,Beijing,100044;2China Civil and Environment Engineering School,University of Science and Technology Beijing,100083,China)

【机构】 北京建筑工程学院； 北京科技大学土木与环境工程学院；

【摘要】 为提高摩擦桩中桩侧摩擦力分布的均匀性,提出了复合锚固桩的地基加固处理技术。该技术是在一根桩内垂直设置若干根不同长度的锚杆,从而将桩顶荷载首先传递到桩体不同部位,然后再传递到周围的土体。根据桩内多点加载的特点,将弹性理论法和矩阵位移法有机的结合起来,用以进行桩侧摩擦力和桩的沉降分析,并开发相应的程序进行计算。算例分析表明,与桩顶加载的普通桩相比,复合锚固桩的桩侧剪应力分布更均匀,从而有效地减少桩顶沉降。更多还原

【Abstract】 A new foundation stabilization technique called composite bolt pile is developed for making the distribution of frictional resistance along friction pile uniform.In the technique,some bolts with different length are set up vertically in a pile.After using the technique,the top load is transferred to different position of pile, then to the adjoining soil.Combining the elastic theory and matrix displacement yields an efficient method to analyze the distribution of shear stress and settlement of pile.The results of numerical examples show that the distribution of frictional resistance of composite bolt piles is more uniform than the one of general piles which is subjected to top load.Consequently,the technique can efficiently reduce the settlement of pile.更多还原