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（華東建筑設計研究總院， 上海 200002）
［摘要］針對港珠澳大橋珠?？诎度斯u的特殊地質條件，對PHC管樁的混凝土材料以及樁身、接頭、樁尖等部位采取了一系列提高抗腐蝕性能的措施。樁基承載力計算考慮負摩阻力的不利影響，并結合類似場地條件的試驗結果采用負摩阻力的近似算法。根據(jù)勘察孔土層情況逐個計算承載力，確定樁長，并對不同樁長進行了精細化的配樁設計，避免大范圍截樁。場地內分布有孤石，根據(jù)試打樁情況，確定了合理的收錘標準，既滿足的設計承載力的要求，又提高了打樁質量和效率。
［關鍵詞］人工島； PHC管樁； 抗腐蝕性能； 負摩阻力
中圖分類號： TU473 文獻標識碼： A 文章編號： 1002-848X(2015)S2-0228-04
Design and application of PHC pipe piles in artificial island
Zhang Yaokang， Jiang Benwei， Zhou Jian， Chen Kai， Wang Hongjun
(East China Architectural Design & Research Institute, Shanghai 200002, China)
Abstract: Based on the special geological conditions of the artificial island for Zhuhai Port of Hong Kong-Zhuhai-Macao Bridge, a series of measures were taken on pile shafts, pile joints and pile heads to enhance corrosion resistance of PHC pipe piles. Considering the adverse impact of negative friction and the test results of similar site conditions, negative friction was calculated in an approximate algorithm in the calculation of bearing capacity of the pile foundation. According to the soil condition of investigation bore holes, bearing capacity of foundation and length of piles ware calculated. Careful pile design was also made for different pile length so that a wide range of pile truncation can be avoided. Boulders were distributed in the site therefore standard of stopping pile driving was determined according to test pile driving which satisfies not only the demand of bearing capacity but also the quality and efficiency.
Keywords: artificial island; PHC pipe pile; corrosion resistance; negative friction
作者簡介：張耀康，碩士，高級工程師，Email：yaokang_zhang@ecadi.com。
