基于裂缝冲刷试验的分散性土自愈性研究  

Self-healing capability of dispersive soil based on crack scouring test

作　　者：张晓飞[1] 陈新炜 严涛 张文伟 李守义[1] ZHANG Xiaofei;CHEN Xinwei;YAN Tao;ZHANG Wenwei;LI Shouyi(School of Water Resources and Hydro-electric Engineering,Xi’an University of Technology,Xi’an 710048,China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《水资源与水工程学报》2022年第6期167-173,181,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51479168);陕西省水利厅科技计划项目(2020slkj-12)。

摘　　要：为研究分散性土裂缝自愈特性,以西安某矿场天然分散性土的土样和某大坝工程库区土样为研究对象,并以生石灰和碳酸钠盐为分散剂,开展分散性鉴定试验、土体基本性质试验和室内裂缝冲刷试验,探究分散性、土体基本性质和反滤料级配对分散性土裂缝自愈性的影响。结果表明:同一反滤料下,土体的分散性越高,则其裂缝表面土颗粒湿化崩解后掉落的颗粒越小,裂缝愈合越慢,最终自愈程度越好。裂缝自愈特性受到土体基本性质等多种指标变化的影响,其中酸碱度影响最为显著。同一试验土样下,反滤料颗粒粒径越小,则反滤层辅助防渗效果越好,裂缝愈合质量越好。In order to study the self-healing characteristics of cracks in dispersive soil,a series of dispersibility identification tests,soil basic property tests and indoor crack scouring tests were conducted on natural dispersive soil samples from a mine in Xi’an City and soil samples from the reservoir area of a dam project,with quicklime and sodium carbonate as the dispersants.According to the tests,the effects of soil dispersibility,soil basic properties and inverted filter material gradation on the self-healing characteristics of cracks in dispersive soil were investigated.The test results show that under the same inverted filter material,the higher the dispersibility of the soil mass,the smaller the soil particles fallen from the crack surface after wetting and disintegration,the slower the crack healing and the better the final self-healing effect.The self-healing characteristics of cracks are influenced by the changes of various indicators such as the basic properties of soil,among which the influence of pH is the most significant.Under the same test soil sample,as the particle size of the inverted filter decreases,the auxiliary impermeability effect of the inverted layer and the crack healing quality improves.

关 键 词：分散性土 裂缝自愈性 裂缝冲刷试验 心墙防渗土料 反滤料 

分 类 号：TU411[建筑科学—岩土工程] TV641.25[建筑科学—土工工程]