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（東南大學(xué)土木學(xué)院 南京 210096）
【提要】對(duì)蘇通大橋超大住攫始啤卡在搭設(shè)過程中出現(xiàn)的鋼管樁斷裂問題進(jìn)行研究，探索了超大樁起始平臺(tái)用鋼管樁作支撐的設(shè)計(jì)及施工方法。根據(jù)對(duì)施工方法、水文地質(zhì)資料、斷樁實(shí)測資料的分析，提出鋼管樁在水流作用下的受力和振動(dòng)分析方法,找出鋼管樁斷裂的主要原因是漲潮急流、渦振的反復(fù)作用，同時(shí)提出控制鋼管樁破壞的措施。
【關(guān)鍵詞】 斷樁 水流 渦振 【力系數(shù)】
Initiate Platforms Construct Method of Superbig Piles and Analysis on Causes of Broken Piles
/Su Hui, Gong Weiming, Liang Shuting（College of Civil Engineering, Southeast University, Nanjing 210096, China）
Abstract:The broken steelpipe piles for the initiate platforms of superbig piles at the course of construct in Sutong bridge are studied，and the design and construct methods of the initiate platforms for superbig piles with the steel pipe piles are explored. According to the analysis of the construct method, hydrology and geology data, measured data of the broken piles, the method of analyzing the internal forces under flood and vibration for steel pipe piles are advanced. The main cause of broken steel pipe piles is the function of tide rushing and vortex vibration. The controlling measures are put forward.
Keywords:broken piles； flood； vortex vibration； dynamic factor
*江蘇省“青藍(lán)工程”中青年學(xué)術(shù)帶頭人資助項(xiàng)目；江蘇省高校自然科學(xué)研究計(jì)劃項(xiàng)
目(04KJD560074)；連云港市社會(huì)發(fā)展項(xiàng)目(SH0423)。