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目前规范中管桩的水平承载设计仍参考普通灌注桩,造成设计偏于保守。为了揭示管桩双桩在水平荷载下的承载机理及群桩效率综合系数的安全储备值,结合黄河冲积平原某工程进行了现场试验。结果表明:管桩双桩承载力试验值大于规范计算结果,得到的群桩效率系数是规范法计算值的1.20~1.35倍。研究成果可为今后同类地区水平承载管桩的设计工作提供参考依据。
At present, the horizontal bearing design of the pipe pile still refers to the ordinary bored pile, resulting in the design being conservative. In order to reveal the safety mechanism of bearing capacity of pile under double load and the comprehensive coefficient of pile group efficiency, a field test was conducted based on a project of Yellow River alluvial plain. The results show that the test value of the bearing capacity of double pile of pipe pile is larger than the standard calculation result, and the efficiency coefficient of pile group obtained is 1.20 ~ 1.35 times of the calculated value of the code method. The research results can provide references for the design of horizontal bearing pipe piles in similar areas in the future.