灰土地基鼓胀病害成因探究——以西北盐渍土地区某库房为例  

Study on the Disease Causes of Swelling of an Ash Foundation——A Case Study on a Warehouse in the Northwest Saline Soil Area

作　　者：张常利[1] ZHANG Chang-li(Lanzhou Resources & Environment Voc-Tech College,Lanzhou 730021,China)

机构地区：[1]兰州资源环境职业技术学院

出　　处：《工业技术创新》2019年第3期65-68,共4页Industrial Technology Innovation

摘　　要：以西北盐渍土地区某库房为研究对象,对灰土地基鼓胀病害成因进行探究。基于库房参数分析,结合地基病害现状监测,进行现场探坑开挖和取样,发现地基中存在高达70%的生石灰,且拌制灰土地基的素土中含有0.94%~0.98%的亚硫酸盐和亚氯盐。分析得知:造成灰土地基鼓胀病害的主要原因为散水开裂,导致生石灰吸水,发生较强烈的膨胀;次要原因为亚硫酸盐和亚氯盐含量、含水量、温度变化等因素造成的盐胀。A warehouse in the Northwest saline soil area is taken as the research object to explore the disease causes of swelling of an ash foundation.Based on the analysis of warehouse parameters and the monitoring of foundation diseases,the field excavation and sampling are carried out.It is found that up to 70%of the CaO existed in the foundation,and 0.94%~0.98%of the sulfite and chlorite are contained in the plain soil that mixed the ash foundation.Analysis show that the main cause of swelling of the ash foundation is the cracking of the aproll,which results in the absorption of water and further results in the strong expansion of the CaO.The secondary cause is the salt swelling caused by factors including the sulfite and chlorite content,the water content and the temperature change.

关 键 词：盐渍土 灰土地基 鼓胀病害 生石灰 盐胀 

分 类 号：TU521.3[建筑科学—建筑技术科学]