抗滑桩设计中关于确定桩间距问题的分析  

Analysis on spacing between piles in the design of anti-slide pile

作　　者：郑磊[1] 殷坤龙[1] 简文星[1] 桂树强[1] 

机构地区：[1]中国地质大学工程学院,武汉430074

出　　处：《水文地质工程地质》2005年第6期71-74,共4页Hydrogeology & Engineering Geology

基　　金：教育部博士点基金项目(20030491004);教育部科学研究重点项目(03034)

摘　　要：抗滑桩间距的确定是滑坡防治工程中的关键之一。本文基于土拱效应,分析桩间土拱的受力状态,通过土拱能够保持整体稳定性、拱顶和拱脚处截面最不利受力点达到临界应力状态来共同控制桩间距,得到了较为合理的桩间距计算公式,在其它因素不变的情况下,分析了桩间距与桩后滑坡推力、土体粘聚力和内摩擦角之间的关系,并结合工程实例进行了验证。The determination of the rational spacing between adjacent anti-slide piles is very important in landslide control works＇ design. In this paper, the authors analyze on the mechanical characteristics of soil arch between square piles based on the soil arch effect. The discussion is based on the following assumptions： （1） soil arch can maintain stability; （2）the most harmful points in soil arch arrive at critical state. Then we set up the reasonable computation model. Using this model, we can obtain the relationships between the spacing and pushing force of slide, cohesion or internal friction angle of soil behind piles while other effective factors are not varying. The model is verified by some engineering practices.

关 键 词：滑坡 抗滑桩 土拱效应 桩间距 

分 类 号：P642.22[天文地球—工程地质学] TU473.1[天文地球—地质矿产勘探]