| 贵阳永温中学岩溶塌陷发育临界条件研究 |
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| 引用本文： | 姜伏伟,李 亮,陈 航.贵阳永温中学岩溶塌陷发育临界条件研究[J].中国岩溶,2018,37(2):294-299. |
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| 作者姓名： | 姜伏伟 李 亮 陈 航 |
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| 作者单位： | 贵州理工学院 |
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| 基金项目： | 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 |
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| 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%。
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| 关 键 词： | 岩溶塌陷 崩解试验 临界含水量 塌陷模拟试验 |
Critical conditions for karst collapses in the Yongwen Middle School, Guiyang, China |
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| JIANG Fuwei,LI Liang and CHEN Hang.Critical conditions for karst collapses in the Yongwen Middle School, Guiyang, China[J].Carsologica Sinica,2018,37(2):294-299. |
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| Authors: | JIANG Fuwei LI Liang and CHEN Hang |
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| Institution: | Guizhou Institute of Technology |
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| Abstract: | 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. |
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| Keywords: | karst collapse disintegration test critical water content simulation test of collapse |
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