【作者】 王耀辉； 谭国焕； 李启光； 徐钺；

【Author】 Y.H.Wang;L.G.Tham;P.K.K.Lee;Y.Tsui Department of Civil Engineering,The University of Hong Kong

【机构】 香港大学土木工程系；

【摘要】 对嵌岩桩的桩侧阻力特性的预测是一个复杂的问题,由于嵌岩桩的极限承载力很高,在现场试验中很难将其加载至破坏。本文中,采用室内模型试验的方法对桩混凝土及岩石界面的摩阻特性进行了研究。试验在岩块上钻孔并灌注混凝土制作嵌岩模型,然后进行荷载试验以确定其极限承载力,并同时记录不同部位轴向力的变化。试验结果用有限元耦合弹塑性界面单元的程序进行了模拟,并对桩混凝土与岩石界面的摩阻特性进行了分析。更多还原

【Abstract】 Prediction of rock socket shaft resistance is a complex problem, and seldom rock socketed piles can beloaded to failure in field test due to their high ultimate load capacity. In this paper, the shear resistance behavior ofrock concrete interface was studied by laboratory model tests. Two concrete shafts were constructed in rock mass,and load tests were performed to evaluate their capacity. The variation of the axial load profiles along the shaftwas recorded during the test.. An axisymmetric FEM program, which is coupled with elastoplastic interfaceelements, was used to simulate the testing process and evaluate the resistance behavior of rock concrete interface.更多还原