摘要
揭示悬臂式抗滑桩间土拱效应的空间分布,有助于桩间距设计及桩间土稳定性控制等技术的发展。采用有限元分析数值模拟方法,通过对悬臂桩后土体的应力及位移进行分析,得到了土拱的三维空间形态及其影响因素。在此基础上,对桩后土体水平方向应力突变峰值点数据进行统计分析,得到了不同桩间距条件下的土拱轴线方程。通过土拱的轴线方程可以判断自然土拱的位置,在桩间自然土拱不同位置布置微桩群,研究微桩布置在不同区域对桩间土稳定性的影响,探究微桩最佳布置区域。同时探索微桩尺寸、弹性模量对其桩间土加固效果的影响规律。
To reveal the spatial distribution of soil arch effect between cantilevered anti-slide piles is helpful to the de⁃velopment of pile spacing design and soil stability control between piles.By means of finite element analysis and numeri⁃cal simulation,the stress and displacement of the soil behind the cantilever pile are analyzed,and the three-dimensional space shape of the soil arch and its influencing factors are obtained.Based on it,the peak point data of abrupt stress in horizontal direction of soil behind piles are statistically analyzed,and the soil arch axis equation under different pile spacing conditions is obtained.The position of the natural soil arch can be judged by the axis equation of the soil arch,and the pile groups are arranged at different positions of the natural soil arch between piles,so as to study the influence of the micro-pile arrangement in different areas on the stability of the soil between piles and explore the optimal area of micro-pile arrangement.At the same time,the influence law of micro-pile size and elastic modulus on the reinforcing ef⁃fect of soil between piles is explored.
作者
黄达
冯开
宋宜祥
HUANG Da;FENG Kai;SONG Yixiang(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)
出处
《河北工业大学学报》
CAS
2021年第5期79-88,共10页
Journal of Hebei University of Technology
基金
国家自然科学基金(41972297,41902290)
河北省教育厅高校百名优秀创新人才支持计划(SLRC2019027)。
关键词
悬臂式抗滑桩
土拱效应
微桩
桩间距
桩间土
cantilever anti-slide pile
soil arch effect
micro pile
pile distance
soil between piles
