摘要
桩间距是抗滑桩设计的一个重要指标,现行的工程设计计算中尚未考虑土拱效应的影响。在分析了土拱效应形成机理的基础上,引入了拱轴线成抛物线的假定,依据抗滑桩被动受力的特点,假设拱轴线起点切线的倾角β=π/4+/2,综合考虑土拱静力平衡条件和强度条件,建立出合理的桩间距计算方法,得出了一个符合工程实际的半经验公式,使设计计算更为合理。
Pile spacing is an important index during the design of anti-slide piles; however, present en gineering design methods have not taken soil arch effect into account yet. this paper analyses the generating mechanism of soil arch effect , introduces the assumption that arch axis is parabolic. According to the passive ly loaded characteristic of anti-slide piles, supposing that the inclination angle of tangent line at the starting point of arch axis equals to π/4 ＋ φ/2, taking account for the static equilibrium condition of soil arch and strength condition, a reasonable calculation method is set up for pile spacing, a semiempirical formula which corresponds to actual engineering practice is also obtained, which enables the design calculation for pile spac ing more reasonable.
出处
《中南公路工程》
2006年第2期1-3,28,共4页
Central South Highway Engineering
基金
国家自然科学基金资助项目(50578060)
关键词
抗滑桩
土拱效应
主应力迹线
抛物线型土拱
合理桩间距
Anti-slide pile
Soil arch effect
Principal stress trajectory
Para bolic soil arch
Rational pile spacing
作者简介
赵明华（1956-），男，湖南洞口人，博士生导师，主要从事岩土工程解析和数值分析方法，桩基及基坑支护等研究。
