現(xiàn)澆薄壁筒樁豎向荷載機理研究*
宮秀濱1，范慶來1，盧建平2
- 摘 要
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（1 魯東大學(xué)土木工程學(xué)院， 煙臺 264025； 2 國家海洋局第二海洋研究所， 杭州 310012）［摘要］近年來，現(xiàn)澆薄壁筒樁在高速公路、鐵路、水利工程等方面得到了很好的應(yīng)用，但豎向承載力的復(fù)雜性制約了它的發(fā)展。通過6根單樁和一組四樁復(fù)合地基的豎向靜載荷試驗，得到了現(xiàn)澆薄壁筒樁的承載力規(guī)律。同時利用有限元方法對現(xiàn)場情況進行模擬，得到了與試驗結(jié)果基本一致的結(jié)論，并揭示了摩阻力的分布等無法通過靜載試驗得到的結(jié)果。通過試驗結(jié)果和有限元結(jié)果的對比分析，可以基本確定薄壁筒樁的豎向荷載傳遞機制和規(guī)律，從而為薄壁筒樁的設(shè)計、施工提供依據(jù)。［關(guān)鍵詞］薄壁筒樁; 靜載試驗; 有限元分析; 荷載傳遞機制中圖分類號：TU473.1 文獻標識碼：A 文章編號：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*山東省自然科學(xué)基金資助項目(ZR2010EQ036)。作者簡介：宮秀濱,碩士,講師，Email: gongxiubinyt@126.com。參考文獻［1］盧建平，曹國寧，張志強.新型樁基技術(shù)——現(xiàn)澆薄壁筒樁技術(shù)［J］. 巖石力學(xué)與工程學(xué)報,2004,23(4):704-707.［2］蘇JG/T 017—2004 現(xiàn)澆混凝土薄壁管樁技術(shù)規(guī)程［S］.南京：河海大學(xué)出版社，2004.［3］杭州國立基礎(chǔ)工程技術(shù)開發(fā)有限公司.大直徑現(xiàn)澆混凝土薄壁筒樁專利-技術(shù)研究與推廣應(yīng)用［R］. 杭州：杭州國立基礎(chǔ)工程技術(shù)開發(fā)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建筑樁基檢測技術(shù)規(guī)范［S］. 北京: 中國建筑工業(yè)出版社，2008.［6］錢家歡. 土工原理與計算［M］. 2版.北京：中國水利水電出版社，2000.
