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張之穎 楊 榮
（西安交通大學(xué) 710049）[提要] 本文根據(jù)空間軸對稱問題的有限元方法，在經(jīng)過大量非線性彈性分析計算的基礎(chǔ)上，研究了陜甘黃土地區(qū)的柔性樁——灰土井樁的樁型對樁豎直承載力的影響，并與現(xiàn)場試驗的實測結(jié)果對比，證明了樁型效應(yīng)客觀存在的必然性和可靠性。指出改變圓柱形樁型而采用圓楔形樁型是提高灰土井樁承載力的有效途徑之一。
[關(guān)鍵詞] 異形灰土井樁 樁型效應(yīng) 非線性 有限元分析The paper principally discusses the effects of pile's shapes on bearing capacity of different shaped lime -soil bearing piles based on a large 3D nonlinear analysis of finite element. By comparing with the test data, it is proved that the pile's shape effects is reasonable and reliable, and point out that making use of the inverted frustum of a cone lime-soil bearing pile should be one of efficacious way to improve the bearing capacity of lime-soil pile.
Keywords: finite element; nonlinear; pile's shape effects; reliable
