煤系地层高速公路路基石灰改性试验研究  

Experimental study on lime modification of expressway subgrade in coal measure strata

作　　者：邓明超 DENG Mingchao(GuangdongNanyue Transportation Xiongxin Highway Management Office,Nanxiong 512445,Guangdong China)

机构地区：[1]广东省南粤交通雄信高速公路管理处,广东南雄512445

出　　处：《粘接》2023年第11期80-83,共4页Adhesion

基　　金：广东省交通厅2015年度科技计划项目(项目编号:201502008)。

摘　　要：为了研究煤系地层高速公路路基石灰改性工程性质并确定最佳配比方案,以广东省新博高速公路为研究对象,制备不同掺量配比的改性试样,并对煤系边坡稳定程度进行了数值试验。试验结果表明,掺入生石灰和粉煤灰后,煤系边坡稳定程度明显变大;在相同的生石灰用量下,粉煤灰掺量的增加,煤系边坡稳定程度先变大后变小;在相同粉煤灰用量下,生石灰掺量增加,煤系边坡稳定。通过改性试验获取粉煤灰15%+生石灰10%掺量的最佳配比方案,提高了煤系边坡稳定程度。In order to study the engineering properties of lime modification of expressway subgrade in coal measures strata and to determine the optimal proportionscheme,Xinbo Expressway in Guangdong Province was taken as the research object,modified samples with different mix proportions were prepared,and numerical tests were carried out o determine the degree of stability of coal slopes.The test results showed that the stability of coal measures slope was obviously increased after mixingquicklime and fly ash;Under the same amount of quick lime,the stability of coal measures slope first increasedand then decreasedwith the increase of fly ash content;Under the same amount of fly ash,the addition of quicklime increasedand the coal measure slope was stable.The best proportion scheme of 15%fly ash+10%quicklime was obtained through modification test,which improved the stability of coal measures slope.

关 键 词：煤系地层 石灰改性 数值试验 粉煤灰 生石灰 

分 类 号：TU44[建筑科学—岩土工程] U412.366[建筑科学—土工工程]