南通路基土毛细水上升高度试验探究  

Experimental Study on Rising Height of Capillary Water on Nantong Subgrade Soil

作　　者：陈志明 李淑娥 康峰沂 蒋函静 徐宇冉 CHEN Zhiming;LI Shue;KANG fengyi;JIANG Hanjing;XU Yuran(Nantong Highway Development Center,Nantong 226001,Jiangsu,China;School of Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]南通市公路事业发展中心,江苏南通226001 [2]上海交通大学土木工程学院,上海200240

出　　处：《路基工程》2024年第1期54-59,共6页Subgrade Engineering

基　　金：江苏省交通厅项目:南通干线公路路基毛细水病害特点与防治措施研究(21-1898)。

摘　　要：毛细水上升会产生路基病害,以南通某干线公路路基土为研究对象,进行毛细水上升高度直接观测法试验,探究干密度、颗粒分布、含水率对毛细水上升高度的影响。结果表明:不同含水率的土样,随着干密度的增大,毛细水上升高度均呈减小趋势;随着颗粒分形维数的增大,毛细水上升高度均呈增大趋势;水泥改良含水率10%的土样,随着水泥掺量的增加和养护龄期的增长,水泥固化对毛细水上升的抑制作用明显;固化改良施工可选择8%水泥掺量、7天养护龄期或6%水泥掺量、14天养护龄期。Capillary water rise may cause subgrade diseases.taking the subgrade soil of a trunk highway in Nantong as the research object,the direct observation test of rising height of capillary water was tested.The effects of dry density,particle distribution and moisture content on rising height of capillary water was explored.The result shows that the two types of soil sample have different moisture content,the rising height of capillary water tends to decrease as the dry density increases,and the rising height of capillary water tends to increase as the fractal dimension of soil particle increases.The soil sample having 10%moisture content increase with cement content and curing age,the inhibition effect of cement solidification on capillary water rise is more obvious.It is recommended that construction of solidification improvement can choose between 8%cement content and 7-day curing age or 6%cement content and 14-day curing age.

关 键 词：公路路基土 毛细水上升高度 干密度 土颗粒分形维数 改良土水泥掺量 

分 类 号：TU462[建筑科学—结构工程]