大气影响下平顶山膨胀土地基的变形研究  

On Deformation of Expansive-soil Foundation in Pingdingshan under Atmospheric Influence

作　　者：靳向红[1] 翟聚云[1] 

机构地区：[1]平顶山工学院,河南平顶山467001

出　　处：《水运工程》2008年第7期147-150,共4页Port & Waterway Engineering

基　　金：河南省科技发展计划基金资助项目(624250023)

摘　　要：地基变形是土力学中的主要研究课题之一。由于膨胀土具有湿胀干缩特性,膨胀土土体含水率随季节的变化在大气影响下可引起地基的显著变形,易导致建筑物开裂、不均匀沉降等病害。所以大气影响下膨胀土变形量的分析研究是很有必要的。文章针对平顶山市大气影响下膨胀土地基水分变化引起的地基变形进行分析;计算变形的关键是确立含水率沿深度变化的分布,利用工程计算分析,以室内实验和现场实验为根据,定量分析了平顶山膨胀土的性能与含水率的变化关系及胀缩性能特点。Foundation deformation is one of the primary research topics of soil mechanics. Due to the performance of ＂moisture expansion and drying shrinkage＂ of expansive soil, the variation of moisture content of expansive soil with seasons can result in distinct deformation under atmospheric influence, and further lead to cracks of buildings and nonuniform settlement. So, it is necessary to study the deformation of expansive soil under the atmospheric influence. The foundation deformation due to the variation of moisture content of expansive soil under the atmospheric influence is analyzed, the key of which is to calculate the variation of moisture content with depth. The relation between the performance of expansive soil and moisture content and characteristics of expandingshrinking performances are analyzed quantitatively based on the engineering calculation and lab ＆ site experiments.

关 键 词：膨胀土 大气影响程度 膨胀率 收缩系数 

分 类 号：TU471.91[建筑科学—结构工程]