黑棉土地基中的桩基隔胀处理技术研究及效果评价
Research on Pile Foundation Expansion Isolation Treatment Technology in Black Cotton Soil Foundation and Effect Evaluation
王锐 1王曦辉1
作者信息
- 1. 中国路桥工程有限责任公司,北京 100010
- 折叠
摘要
对黑棉土地区进行桩基隔胀处理具有重要的现实意义.文章提出了一种桩基隔胀处理技术,并用解析方式和数值模拟进行了研究.研究发现,在钻孔灌注桩和土之间设置双层分离式圆筒结构隔胀效果明显,在东非黑棉土地区工程中采用降低桩-黑棉土界面刚度的方法,土体胀缩引起的桩头位移将明显减小;在减小黑棉土胀缩对桩轴力的影响方面,界面折减的效果也比较明显.研究结果对今后类似地区工程建设有重要的参考和借鉴价值.
Abstract
It is of great practical significance to carry out pile foundation expansion isolation treatment in black cotton soil areas.A pile foundation expansion isolation treatment technology is proposed and studied by analytical method and numerical simulation.It is found that setting a double-layer separated cylindrical structure between bored piles and soil has a significant effect on expansion isolation.The method of reducing the stiffness of pile-black cotton soil interface is adopted in the engineering in black cotton soil areas in East Africa,the displacement of pile head caused by soil expansion and contraction will be significantly reduced;in terms of reducing the influence of expansion and contraction of black cotton soil on pile axial force,the effect of interface reduction is also obvious.The research results have important reference value for the engineering construction in similar areas in the future.
关键词
黑棉土/地基/桩基隔胀Key words
black cotton soil/foundation/pile foundation expansion isolation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据