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(1 長安大學建筑工程學院, 西安 710064; 2 長安大學公路學院, 西安 710064)

［摘要］介紹了處于黃河中下游沖積平原的鄭州黃河公鐵兩用橋深長樁基承載力測試的傳統(tǒng)靜載荷試樁法。分析了大量的實測數(shù)據及相應的Q-s曲線，并將實測結果與規(guī)范方法所得結果進行了比較。結果表明：實測樁的承載力小于相應規(guī)范值，前者約為后者的74%；實測樁側摩阻力與相應規(guī)范值基本相當，而實測樁端阻力遠小于相應規(guī)范值，前者約為后者的20%; 樁側阻力先于樁端阻力的發(fā)揮，樁的沉降量主要是樁身壓縮量。

［關鍵詞］沖積平原;深長樁;靜載試驗;承載力

中圖分類號：TU473-1文獻標識碼：A文章編號：1002-848X(2011)05-0098-03

Test study on the bearing capacity of long piles on the alluvial plain in the middle and lower reaches of the Huanghe River

Lei Zixue¹, Qu Shangwen¹, Bai Qingxia², Yang Yuhou²(1 School of Civil Engineering, Changan Univerisity, Xi’an 710064, China；2 School of Highway Engineering, Chang’an University, Xi’an 710064, China)

Abstract:Conventional static loading method for long piles adopted in Zhengzhou Road-rail Bridge on the alluvial plain in the middle and lower reaches of the Huanghe River was introduced. Lots of data measured and the corresponding Q-s curves were analyzed, compared  the test results  with those obtained by the method in the code. The test results show that the bearing capacity obtained in the test is less than that calculated according to the code, and the former is about 74% of the latter. The side friction measured is approximately the same as that calculated with the formula in the code, whereas the pile tip resistance is much smaller than that in the code, and the former is about 20% of the latter. The side friction is mobilized earlier than the tip resistance and the pile settlement is mainly the compression of pile shaft compression.

Keywords:alluvial plain; long pile; static loading test; bearing capacity

作者簡介：雷自學,副教授，Email: thunderleizixue@126.com。

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