抗滑桩桩间土拱效应及其土拱模式分析  

Analysis of Soil Arching Effect Between Anti-slide Piles and Different Arch Body Modes

作　　者：杨雪强[1] 吉小明[1] 张新涛[1] 

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006

出　　处：《中国公路学报》2014年第1期30-37,共8页China Journal of Highway and Transport

基　　金：广东省教育厅科研基金项目(2008278)

摘　　要：为研究坡体抗滑桩间土拱的传递荷载机制,首先对抗滑桩桩身迎荷面土拱和桩侧摩阻力土拱的计算方法和使用条件分别进行了分析与论述,然后将这些分析结果与已有研究结果相比较,最后结合土体滑移模式阐述了土拱的形状沿深度的变化及客观存在的重力场对土拱的强化效果。研究结果表明:依赖桩侧摩阻力为拱座的土拱是土坡抗滑桩承担滑坡推力的主要土拱,其能承受住滑坡推力并把该力传至抗滑的桩体;桩身迎荷面土拱是具有临空面的边坡抗滑桩或基坑护壁桩工程中的主要承载土拱。To study the bearing load mechanism of arch bodies, formed between adjacent anti-slide piles in slope, applying conditions and calculating methods for different soil arch bodies were analyzed and discussed. The analysis results were compared with the results published before. The variation of arch body shape with depth and soil mass gravity＇s reinforcement effect on the soil arch bodies were also expounded combined with soil sliding model. The results show that soil arch supporting sliding load depending on pile side surface frictions is the main bearing load arch body for slope engineering and through these arch bodies slope sliding force is easily passed to anti-slide piles; the soil arch body directly supporting sliding load depending on pile front surface supports is another main bearing load arch body, which is obviously suitable for soldier pile＇ design and calculation for deep pit supporting engineering.

关 键 词：道路工程 抗滑桩 理论分析 土拱 桩间距 

分 类 号：U417.1[交通运输工程—道路与铁道工程]