现浇薄壁筒桩竖向荷载机理研究*
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（1 鲁东大学土木工程学院， 烟台 264025； 2 国家海洋局第二海洋研究所， 杭州 310012）［摘要］近年来，现浇薄壁筒桩在高速公路、铁路、水利工程等方面得到了很好的应用，但竖向承载力的复杂性制约了它的发展。通过6根单桩和一组四桩复合地基的竖向静载荷试验，得到了现浇薄壁筒桩的承载力规律。同时利用有限元方法对现场情况进行模拟，得到了与试验结果基本一致的结论，并揭示了摩阻力的分布等无法通过静载试验得到的结果。通过试验结果和有限元结果的对比分析，可以基本确定薄壁筒桩的竖向荷载传递机制和规律，从而为薄壁筒桩的设计、施工提供依据。［关键词］薄壁筒桩; 静载试验; 有限元分析; 荷载传递机制中图分类号：TU473.1 文献标识码：A 文章编号：1002-848X(2013)21-0094-03Research on the vertical bearing capacity of cast-in-situ thin-walled tubular pileGong Xiubin1, Fan Qinglai1, Lu Jianping2(1 School of Civil Engineering, Ludong University, Yantai 264025, China; 2 Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China)Abstract: Cast-in-situ thin-walled tubular pile has been largely applied in highway, railway and hydraulic engineering etc. in recent years, the development of which is restricted by the complexity of the vertical bearing capacity. Through the vertical static load test of six single piles and a group of four piles composite foundation, the regular pattern of bearing capacity of cast-in-situ thin-walled tubular pile was obtained. At the same time, the finite element method was used to simulate the scene to obtain the results in good agreement with test results. Moreover, the finite element method reveals the distribution of frictional resistance which cannot be obtained through the static load test. Comparing the test results and the finite element results, the load transfer mechanism of the cast-in-situ thin-walled tubular pile can be determined to provide the basis for design and construction.Keywords: thin-walled tubular pile; static load test; finite element analysis; load transfer mechanism*山东省自然科学基金资助项目(ZR2010EQ036)。作者简介：宫秀滨,硕士,讲师，Email: gongxiubinyt@126.com。参考文献［1］卢建平，曹国宁，张志强.新型桩基技术——现浇薄壁筒桩技术［J］. 岩石力学与工程学报,2004,23(4):704-707.［2］苏JG/T 017—2004 现浇混凝土薄壁管桩技术规程［S］.南京：河海大学出版社，2004.［3］杭州国立基础工程技术开发有限公司.大直径现浇混凝土薄壁筒桩专利-技术研究与推广应用［R］. 杭州：杭州国立基础工程技术开发有限公司，2004.［4］JARDINE R J, CHOW F C. New design methods for offshore piles［M］. London:Marine Technology Directorate Publiction,1996.［5］JGJ 106—2003建筑桩基检测技术规范［S］. 北京: 中国建筑工业出版社，2008.［6］钱家欢. 土工原理与计算［M］. 2版.北京：中国水利水电出版社，2000.
