饱和黄土碎石桩地基沉降计算  

THE SETTLEMEHT ESTIMATION OF FOUNDATION ON SATURATED LOESS REINFORCED WITH GRANULAR PILES

作　　者：郭蔚东 钱鸿缙[1] 

机构地区：[1]西安冶金建筑学院

出　　处：《土木工程学报》1989年第2期13-21,共9页China Civil Engineering Journal

摘　　要：本文总结了采用碎石桩加固饱和黄土的效果。作者在指出国内外现有桩土应力比理论计算式的不足之后,应用应力剪胀理论,提出了考虑到桩土剪胀性的桩土应力比和沉降折减系数的简明实用计算公式。利用十多项工程的近80个载荷试验结果和冶院饱和土碎石桩地基的桩土三轴试验资料,对该计算公式进行了论证,并与国外有关理论解进行了广泛的对比。本文还给出了这种复合地基的沉降计算方法,并通过实例说明本文方法是可靠的。该法也可用于其它软弱土碎石桩地基的沉降计算。This paper summed up the experience on the effectiveness of strengtheningsaturated loess by using granular pile. After pointing out the shortcomingrof various theoretical formulas of stress concentrating ratio, the authorsput forward a simple and practical formulas for computing the stress concen-tration ratio n and settlement reduction factor β based on the stress dilatan-cy theory. The authors demonstrate the results of almost 80 field load testscarried on more than a dozen sites situated in loess regions and compared themwith the computed results base on the triaxial tests carried on granularpile and loess. The results are compared with relevant theories of other coun-tries and settlement calculation formulas of composite subsoil base are given.Examples are given to verify the method suggested in this paper. This methodcan also be used for other weak subsoils reinforced with granular piles.

关 键 词：黄土 饱和 碎石桩 地基 沉降 计算 

分 类 号：TU473.11[建筑科学—结构工程]