以浑河大桥工程为依托,对大桥的试验桩基进行原位水平加载试验,研究了在水平荷载作用下桩顶的荷载-位移曲线、桩身弯矩分布情况等,并通过有限元软件进行数值模拟验证.研究表明:弯矩沿桩身呈抛物线形分布,在距离桩顶4m左右的位置达到最大值,深度超过8m以后数值接近于零;受场地环境和嵌岩桩桩形影响,桩顶水平位移和转角均较小,满足容许水平位移的要求;数值模拟与试验结果的曲线变化形式上大体吻合,弯矩和位移的实测值要较模拟值稍低.所采用的试验方法和得到的试验结果将对类似工程试验提供经验和指导.%In order to solve the problem of insufficient rock socketed pile in-situ test under horizontal loading ,the load-displacement curve and bending moment distribution of piles under horizontal load is analyzed based on the in-situ test of the two rock socketed piles in Hun River Bridge .Finite element method is adopted to verify the numerical simulation . The results show that the bending moment is parabola distribution along the pile body .The maximum value is about 4 me-ters from the top of the pile and the value is close to zero when depth is more than 8m .The horizontal displacement and the rotation angle of the pile top are small ,which can meet the requirements of the allowable horizontal displacement . The numerical simulation results agree with the experimental results ,and the measured values of bending moment and displacement are lower than the simulated values .The experimental methods and results could provide experience and guidance for similar projects .
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