将华能灌云海上风电场试桩试验实测数据与4种基于CPT测试的黏土p-y曲线方法的理论计算结果进行对比。对比显示：传统的p-y曲线因其原始试验的局限性会显著低估桩侧土体的极限土反力,使桩基设计偏于保守;而双曲线型的p-y曲线虽然高估桩侧土反力,但是对桩侧土体初始刚度预测较准。根据以上对比分析结果,采用Matlab回归函数进行模型集成,将传统型p-y曲线模型与双曲线型p-y曲线模型结合,提出一种基于CPT测试的适用于黏土的复合p-y曲线模型。最后通过与已有工程实例实测数据进行对比,验证了新提出方法的可靠性。该方法可为黏土中水平受荷桩基计算提供新途径。
Abstract
This paper uses the measured load test data of the pipe pile of Huaneng Guanyun Offshore Wind Farm to verify the applicability of the four proposed p-y curve methods for clay. The parameters of p-y curves are obtained using cone penetration tests （CPT）. The comparison results show that the traditional p-y curve will significantly underestimate the ultimate resistance of the surrounding soil due to the limitations of the original test, leading to a conservative pile design, while the hyperbolic p-y curve may overestimate the soil resistance, therefore the initial stiffness can be accurately predicted. On this basis, model ensembling is used and a new p-y curve is established by combining the traditional p-y curve model with the hyperbolic p-y curve model . Finally, a case study is used to verify the reliability of the new p-y method. This method can provide a new way to analyze the lateral loaded pile in clay.
关键词
海上风电 /
静力触探 /
模型集成 /
p-y曲线
Key words
offshore wind turbines /
cone penetration tests /
ensemble averages /
p-y curve
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基金
国家自然科学基金面上项目（52078128）
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