人工挖孔支盘灌注桩与扩底灌注桩承载试验对比研究  

Comparative Study on Bearing Test for Artificial Dig-hole Branch Pile and Belled Pile

作　　者：张利鹏[1] 王端端[1] 黄迎哲 

机构地区：[1]长安大学公路学院,西安710064

出　　处：《路基工程》2014年第4期140-143,共4页Subgrade Engineering

摘　　要：结合新济公路虎岭至邵原段试桩的静载试验,对比研究了扩底桩与支盘桩承载特性区别,包括桩身轴力、桩端阻力、桩侧摩阻力,并讨论了支盘承担荷载情况。试验对比研究结果表明:相比支盘桩,扩底桩的承载力高、沉降小;由于支盘的存在,支盘桩和扩底桩的桩身轴力及侧摩阻力的发挥性状不相同;支盘的承载特性发挥表现出时序性;扩底桩的桩端阻力较支盘桩高,而荷载沉降曲线表明,试桩表现出了摩擦桩、端承桩的性质。Depending on static load test on the test piles along the Huling-Shaoyuan Section of JinanXinhailian Highway, this paper studied the differences in the bearing characteristics between branch and belled piles through comparison, involving axial force on pile body, resistance on pile end, and friction and resistance on pile side; and then discussed the loads borne by the branch plate. The results show that, compared with the branch pile, the belled pile has larger bearing capacity with minor settlement; due to the presence of branch plates, the branch pile has the axial force and the lateral friction and resistance act differently from the belled pile ; the action of the branch plates＇ bearing characteristics shows time sequence regularity; the belled pile has larger end resistance than the branch pile, and the load-settlement curve demonstrates that the test piles t^resent the nrone.rties of friction nile and end-henrin~ nilo

关 键 词：扩底桩 支盘桩 对比试验 荷载-沉降 桩身轴力 桩侧阻力 

分 类 号：TU473.14[建筑科学—结构工程]