水泥改性弱膨胀土填筑碾压试验研究  

Experimental research on filling and rolling of modified weak expansive soil by cement

作　　者：张春燕 华夏 陈嘉 赵峰 

机构地区：[1]长江勘测规划设计研究有限责任公司施工设计处,湖北武汉430010

出　　处：《人民长江》2015年第3期24-26,共3页Yangtze River

基　　金："十二五"国家科技支撑计划项目"南水北调中线工程膨胀土和高填方渠道建设关键技术研究与示范"(2011BAB10B05;2011BAB10B06)

摘　　要：南水北调中线总干渠穿越膨胀土（岩）渠段累计约387 km,为控制工程投资,部分渠段采用水泥改性弱膨胀土进行填筑。填筑施工前,选取南阳地区膨胀土作为研究对象,开展了一系列膨胀土碾压试验以确定合理的填筑施工参数。试验分析结果表明,不同地区水泥改性弱膨胀土的填筑施工参数略有差别;铺土厚度取30 cm,使用20-25 t振动凸块碾碾压6-12遍时,压实效果较好。In Middle Route Canal of South- to- North Water Diversion,the accumulated length of expansive soil section is about 378 km. In order to control the engineering investment,the weak expansive soil by cement modification was used for filling in partial canal reaches. Before the filling construction,the expansive soil in Nanyang City was selected as a research object and a series of filling and rolling tests were carried out to determine the filling parameters. The analysis results indicate that the filling construction parameters of weak expansive soil by cement modification in different areas were slightly different. The compacting effect reaches the best by rolling 6 ~ 12 times by the scab vibratory roller of 20 ~ 25 t,with the soil thickness of 30 cm.

关 键 词：渠堤填筑 碾压试验 施工参数 水泥改性弱膨胀土 南水北调中线工程 

分 类 号：TV641.43[水利工程—水利水电工程]