摘要
通过现场调查,永温中学校区内及周围存在7处塌陷点,1处塌陷隐患点,严重地威胁着该校师生生命财产安全。研究区基岩可溶性成分多,覆盖粘土层较薄,且地下水溶蚀性强,属于岩溶塌陷的高危险区。为了预防岩溶塌陷灾害,文章总结分析了研究区岩溶塌陷发育的裂隙-渗流-崩解模式,并通过室内模拟试验验证。模拟试验结果表明,土体含水量是崩解作用形成塌陷的关键参数。进一步开展8组不同含水量原状样的崩解试验,结果表明,研究区岩溶塌陷发育的土体含临界水量为26.8%,发育条件为0~26.8%。
There are 7 karst collapses happened and 1 potential collapse site in the Yongwen Middle School of Guiyang city,which pose a serious threat on the safety of teachers and students and property there.This site is characterized by highly soluble bedrock,thin covering clay layer and strong groundwater erosion;these have caused the site to be a high-risk karst collapse in this area.Through laboratory simulation test,it is realized that the karst collapse hazard follpwed a fissure-seepage-disintegration model.The results also show that the soil water content is critical in the disintegration and the formation of karst collapses.Furthermore,8 sets of undisturbed samples with different water content are used to conduct disintegration tests.They demonstrate that the water content of 26.8%is the critical value to trigger karst collapse,while 0~26.8% is the condition for generation of such a risk at the site.
作者
姜伏伟
李亮
陈航
JIANG Fuwei;LI Liang;CHEN Hang(Guizhou Institute of Technology,Guiyang,Guizhou 550003,China)
出处
《中国岩溶》
CAS
CSCD
北大核心
2018年第2期136-141,共6页
Carsologica Sinica
基金
贵州省科技厅科技支撑计划社发公关领域项目(黔科合[2016]支撑2846)
贵州理工学院高层次人才科研启动经费项目
关键词
岩溶塌陷
崩解试验
临界含水量
塌陷模拟试验
karst collapse
disintegration test
critical water content
simulation test of collapse
作者简介
姜伏伟（1987-）,男,博士,主要从事岩溶工程灾害研究.E-mail：jfwei_666@126.com.
