摘要
结合工程实践提出煤矸石-土工格栅-砂层状体系的加筋土结构,通过直剪试验和拉拔试验,测试不同法向应力下煤矸石-土工格栅-砂层状体系的筋土界面特性,并与常规加筋土结构的筋土界面特性进行对比。研究表明:层状加筋体系具与有常规加筋土体系相似的界面特性,但由于砂的充填作用,提高了加筋层的密实度,增大了筋土接触面,使筋土界面强度更高,且界面强度发挥更早;层状加筋土体系还可以为加筋煤矸石提供排水通道,避免煤矸石浸水软化。
Based on the engineering practice , a new type reinforced soil composed of coal gangue-geogrid-sand was put forward.By direct shear tests and pull-out tests, the interface characteristics of the layered structure in different normal stress were tested and compared with that of common type of geogrid reinforced coal gangue .The results showed that the interface properties of the layered system were similar to those of a common reinforced earth system . Due to filling effect of sand , the compactness of reinforced layer was improved and the interface between filling and reinforcement was increased, the interface strength was higher and played earlier .Moreover, the new layered reinforced system could provide drainage channels for reinforced coal gangue that could avoid softening of coal gangue .
出处
《工业建筑》
CSCD
北大核心
2014年第4期90-93,134,共5页
Industrial Construction
基金
国家自然科学基金项目(51208195)
浙江省交通科技项目(2013H27-4)
湖南省教育厅科研项目(13C311)
湖南科技大学博士科研启动基金项目(E51360)
关键词
煤矸石
直剪试验
拉拔试验
界面特性
coal gangue
direct shear test
pullout test
interfacial property
