| 李煜楠,郑圣宝,李晶,文海霞.广东省惠东县地质灾害发育特征及形成条件[J].贵州地质,2023,40(2):185-192 |
| 广东省惠东县地质灾害发育特征及形成条件 |
| Development Characteristics and Formation Conditions of Geological Disasters in Huidong County，Guangdong Province |
| 投稿时间：2023-02-07 |
| DOI： |
| 中文关键词: 地质灾害 发育特征 分布规律 形成条件 惠东县 |
| 英文关键词:Geological disasters dDevelopmental characteristics Regularity of distribution Formation conditions Huidong county |
| 基金项目:惠东县地质灾害风险普查项目(编号:HZZM2021007)资助。 |
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| 中文摘要: |
| 通过开展惠东县地质灾害调查与成灾规律研究，对惠东县地质灾害发育特征与分布规律进行总结，并详细分析惠东县地质灾害形成条件，结果表明:惠东县地质灾害类型多，且具有分布不均、局部集中的特点。地质灾害发生时间主要集中在5—9月，且8月份为地质灾害高发期。空间上，地质灾害主要分布在宝口镇、高潭镇、白盆珠镇。地质灾害点多沿断裂构造或褶皱构造大致呈线性分布，在区域性大断裂与其次生断裂的交汇处地质灾害点分布更为密集。在岩性组合上，地质灾害主要分布在层状较软-较硬碎屑岩组中，其次为块状较硬-坚硬侵入岩综合岩组。在地形地貌上，20°50°坡度范围内的斜坡最易发生滑坡，40°80°坡度范围内最易发生崩塌。人类工程活动、降雨为地质灾害最主要的诱发因素，地质灾害大多与城乡建设中的削坡建房有关，在强降雨期间或雨后一天，地质灾害较为易发。 |
| 英文摘要: |
| By geological disaster survey and law study of disaster in Huidong county，the developing characteristics and distribution rule are summarized，the formation condition of geological disaster in Huidong county is also discussed，the results show: the geological disaster has multiple types and have the features of heterogeneous distribution and partial concentration. The time of geological disaster occurrence mainly concentrated from May to August，April is the high incidence season of geological disaster. Spatially，geological disasters are mainly distributed in Baokou town，Gaotan town and Baipenzhu town. The distribution of geological hazards is mainly along the fault structure or fold structure as a line，which is more intensive in the junction of regional major fault and its secondary fault. In the part of lithofacies associations，the geological disaster mainly distributed in soft and harder layer clastic rock association，then the harder and stiff comprehensible intrusive rock association. The slope of 20°~50° is the most prone to landslide，and the slope of 40°~80° is the most prone to collapse. Human engineering activities and rainfall have become the main inducing factors of geological disasters. Geological disasters are mostly related to slope cutting and building in urban and rural construction. Geological disasters are more prone to occur during heavy rainfall or one day after rain |
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