摘要
为了评估已有基于静力触探试验(CPT)的桩基侧摩阻力计算方法对黄河下游地区灌注桩的适用性,采用文献中4种CPT方法和SPT试验进行预测,并与现场静载试验结果进行了对比分析。结果表明:AOKI法显著低估了总桩侧阻力,PHILIPPONNAT法和LCPC法总侧阻力计算结果与试验结果误差较小,但是对于土层的桩侧摩阻力预测结果误差较大;LCPC法和孔压静力触探测试技术规程方法预测较好,但是4种CPT方法均不及SPT试验,无论是数据拟合还是概率分析,SPT试验整体预测效果均较可靠。该研究可为黄河下游地区及相似土质情况下灌注桩的桩侧摩阻力计算提供参考。
To evaluate the applicability of the existing methods of pile shaft resistance based on static penetration test(CPT)to cast-in-place piles in the lower reaches of Yellow River,four CPT methods and SPT tests in the literature were used for prediction,and the results were compared with the results of the static load test.The results show that the Aoki method significantly underestimates the total pile side resistance,the error between the calculation by the Philipponat method and the LCPC method is small.But the error of the prediction result of pile side friction for soil layer is larger.The predictions of the LCPC method and the pore pressure static penetration test method are better,but the four CPT methods are not as good as the SPT test.Comparatively SPT test predictions are reliable both in data fitting and probability analysis.This study can provide a reference for the calculation of pile shaft resistance of cast-in-place piles in the lower reaches of Yellow River and similar soil conditions.
作者
任志文
莫品强
刘彬
王洪国
庄培芝
REN Zhi-wen;MO Pin-qiang;LIU Bin;WANG Hong-guo;ZHUANG Pei-zhi(State Key Laboratory for GeoMechanics and Deep Underground Engineering/School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Shandong Hi-Speed Group Co.,Ltd.,Jinan 250098,Shandong,China;School of Qilu Transportation,Shandong University,Jinan 250002,Shandong,China)
出处
《地基处理》
2022年第S01期121-127,133,共8页
Journal of Ground Improvement
基金
国家自然科学基金项目(51908546,52178374)
关键词
CPT
灌注桩
侧摩阻力
静载试验
标准贯入试验
cone penetration test(CPT)
cast-in-place piles
pile side friction
the static load test
standard penetration test
