| 覆盖型岩溶地面塌陷综合地质预测与危险性评估 |
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| 引用本文： | 罗小杰,罗 程.覆盖型岩溶地面塌陷综合地质预测与危险性评估[J].中国岩溶,2016,35(1):51-59. |
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| 作者姓名： | 罗小杰 罗 程 |
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| 作者单位： | 长江岩土工程总公司(武汉）,长江岩土工程总公司(武汉） |
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| 基金项目： | 武汉地铁岩溶专题勘察项目资助 |
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| 摘 要： | 为了给覆盖型岩溶地面塌陷防治提供依据,以岩溶地面塌陷的沙漏型、土洞型和泥流型等三个塌陷机理为基础,根据岩溶地质结构,结合岩溶发育程度和触发因素,提出了覆盖型岩溶地面塌陷综合地质预测和危险性评估方法。根据塌陷变形中土颗粒行为特征,将可溶岩上覆盖层土体区分为砂性土、粘性土和软弱土三种基本类型。依据三类土层在剖面上的组合关系,划分出三大类九个亚类岩溶地质结构。首先,依据岩溶地质结构的平面分布特征,结合岩溶发育程度和研究区可能存在的触发因素,对岩溶地面塌陷进行综合地质预测,即区分为高、中、低三个易发区;然后结合塌陷灾害对周围环境的可能影响程度,进行地面塌陷危险性评估,即划分为高、中、低三个危险区。覆盖型岩溶地面塌陷综合地质预测与危险性评估方法的地质理论依据充分,具有较好的实用性和可操作性。
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| 关 键 词： | 覆盖型岩溶 地面塌陷 综合地质预测 危险性评估 |
Comprehensive geological prediction and risk assessment of covered karst ground collapse |
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| LUO Xiao-jie and LUO Cheng.Comprehensive geological prediction and risk assessment of covered karst ground collapse[J].Carsologica Sinica,2016,35(1):51-59. |
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| Authors: | LUO Xiao-jie and LUO Cheng |
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| Institution: | Changjiang Geotechnical Engineering Corporation and Changjiang Geotechnical Engineering Corporation |
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| Abstract: | To provide the basis for the prevention and control of Covered Karst Ground Collapse (CKGC), based on the mechanism of three types of ground collapse which are respectively hourglass, soil cave and soil flow, and combined karst development degree with collapse triggering factors, a comprehensive geological prediction and risk assessment method for CKGC are proposed in this paper. According to the characteristics of soil particles in deformation and collapse, the soil body on the soluble rock can basically be divided into 3 types as sand, clay soil and soft soil. The 9 kinds of karst geological structures are divided on the basis of the combination of above three types of soils. At first, according to the spatial distribution of the karst geological structures, a comprehensive geological prediction of karst ground collapse was made in combination of the degree of karst development with the possible trigger factors. As a result, the study area was divided into 3 zones, namely, high prone zone, medium prone zone and low prone zone. Secondly, based on the potential impact of collapse disaster to the surrounding environment, the CKGC risk assessment was also completed, which resulted in the study area to be divided into 3 zones too, i.e., high risk zone, medium risk zone and low risk zone. The geological theory basis for CKGC comprehensive geological prediction and risk assessment method is sufficient; and it has a good practicability and operability. |
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| Keywords: | covered karst ground collapse comprehensive geological prediction risk assessment |
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