天然地基变刚度垫层的概念与方法  

Concept and method of variable rigidity bedding for subgrade

作　　者：周峰[1,2] 宰金珉[1] 梅国雄[1] 刘松玉[2] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009 [2]东南大学交通学院,江苏南京210096

出　　处：《四川建筑科学研究》2009年第4期116-119,共4页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50678083);国家青年自然科学基金资助项目(50608038)

摘　　要：天然地基基础的内力取决于地基反力的大小与分布。在基底下设置变刚度垫层,人为合理地调整地基土刚度,使其在基底平面内变化,对改善地基和基础的工作状态有着重要的意义。模型实验和数值分析均表明,变刚度垫层不仅能显著减小基础的不均匀沉降,而且也能降低基础的内力,减小板厚。另外,分析结果还表明,变刚度垫层的宽度存在一个最优解。Distributing and magnitude of foundation reaction determine the force of foundation in subgrade. Variable rigidity bedding adjust rigidity of soil rationally, and make it vary in the plane of foundation. It is significative to improving the work status of subgrade and foundation. Model test and numeric analysis show that variable rigidity bedding could reduce differcntial settlement of foundation remarkably. It also could minish the force of foundation and reduce the thickness of raft. Additionally, result of numeric analysis proved optimum solution of variable rigidity bedding width.

关 键 词：天然地基 差异沉降 变刚度垫层 

分 类 号：TU471.1[建筑科学—结构工程]