柔性基础下刚性桩复合地基沉降计算研究

摘要

通过深入探讨长短桩复合地基的作用机理,针对长短桩复合地基中桩、土、垫层相互作用的特点,在剪切位移法的基础上,引入Mylonakis & Gazetas的桩与桩、桩与土相互作用模型,同时考虑垫层作用的影响,导出长短桩复合地基计算时的桩-桩、桩-土以及土-土相互作用的柔度系数,提出了一种综合考虑桩-土-垫层体系共同作用的长短桩复合地基沉降计算的新方法,并编制了相应的计算程序；最后利用该方法对某工程实例进行分析,理论计算值与实测值吻合较好.%Through further discussed on mechanism of the length-pile composite foundation, according to the interaction of the characteristic of pile,soil and cushion in length-pile composite foundation , introducing the Mylonakis & Cazetas piles and piles, the pile and soil interaction model on the basis of shear displacement method, considering effect of the cushion layer, export the flexibility ration of the length pile composite foundation when calculating the interaction coefficient. A new method of computation of settlement were put forward by comprehensive consideration of pile-oil-cushion system when joint action in composite foundation, and aslo work out a corresponding calculation program. Finally carry on the analysis for a project example by this method, the calculated value is neatly dovetails.