浆固碎石桩单桩轴向荷载传递分析

浆固碎石柱是一种新型的桩基技术，已成功应用于铁路、高速公路等工程中。但由于浆固区的存在，浆固碎石桩荷载传递机理的复杂性制约了其发展和工程应用。荷载传递分析法是桩荷载传递机理分析的重要方法之一。本文采用线性弹塑性和双折线传递函数，分别模拟桩侧土体的非线性和桩端土的硬化特性，同时考虑浆固区存在对桩荷载传递的影响，推导出一种浆固碎石桩单桩荷载传递分析方法。最后，通过对工程实例进行计算，验证了本文计算方法的实用性。结果表明，浆固碎石桩除具有一般刚性桩的桩体置换作用外，浆固区的存在对提高浆固碎石柱承载力、减小沉降量也有着重要作用。

Analysis on Axial Load Transfer along Grouted Gravel Pile

Grouted gravel pile is a new technique of pile. Load transfer of this kind of pile is not expatiated because of the complex mechonism of grouted zone about the pile,which restricts development and practical application of this kind of pile. The load transfer function method is an important way to analyze load transfer mechannism of pile. According to the law of linear increase of shear strength of natural ground,a load transfer function for grouted gravel pile is obtained with linear elasto-plastic load transfer fucntion, while the effect of grouted zone is considerated. And the practicability of this method is illustrated by an actual case.