摘要
为了研究桩间存在土拱效应的挡土板土压力,本文根据桩间土拱的静力平衡条件和拱脚处土体强度条件,建立计算模型,得出了桩间土拱形状的空间函数。在分析桩间土拱形状的基础上,确定了桩间土体的滑裂面,从理论上推导出了桩间挡土板土压力计算公式。对影响土压力大小的各种参数进行了分析得出:在不同参数条件下,将其与朗肯土压力进行比较。结果表明在其他因素不变的情况下,挡土板土压力大小受桩间距影响最大,它随着桩间距的增大而增大。土压力明显小于朗肯土压力,说明考虑土拱效应的土压力计算方法使挡土板设计更加经济准确。
Firstly, the mechanical model is based on static equilibrium of the soil arch between two piles in pile - slab wall and soil resistance on its two end sections near two piles. The calculation method is developed. Then the shape function of soil arch is derived. Slide plane is ascertained after analysis of the shape function. The calculation formula of earth pressure on slab between two adjacent anti - slide piles is formulated. The formula has several factors acting on the earth pressure. The factors are analyzed. For the same test, the new earth pressure formula is compared with the Rankine method. It is shown that the distance between two adjacent piles is the main factor. Earth pressure increases as the distance increase. At the end, the calculation formula is illustrated with a practical project.
出处
《工程地质学报》
CSCD
北大核心
2009年第2期274-279,共6页
Journal of Engineering Geology
关键词
桩板式挡土墙
挡土板
土拱
土压力
Pile -slab wall, Anti -slide pile, Soil arch, Earth pressure, Landslide prevention, Case studies
