燕子河流域崩塌地质灾害成灾机理分析

发布时间：2018-05-20 03:43

本文选题：崩塌 + 地质环境　；参考：《水土保持研究》2017年03期

【摘要】：在分析燕子河流域地质灾害形成的地质环境背景及诱发因素的基础上,对燕子河流域崩塌地质灾害的类型、发育特征进行了分析,总结了流域内3种主要的崩塌地质灾害破坏模式及演化过程,并选取典型崩塌进行了稳定性研究。结果表明:燕子河流域崩塌地质灾害以岩质、小型、复合式、中低位、不稳定崩塌为主;崩塌在空间上主要分布在燕子河干流、主要支流河谷斜坡地带及康县—阳坝公路沿线人类工程活动密集的"一路一带"上,时间上主要集中于降雨较为集中的7—9月;崩塌的破坏模式主要有碎裂—坠落式、弯折—倾倒—滑移式、碎裂—滑移式,每种破坏模式经历4个阶段演化后形成灾害;典型崩塌稳定性计算得出暴雨是崩塌发生的主导诱发因素。
[Abstract]:Based on the analysis of geological environment background and induced factors of geological disasters in Yanzi River Basin, the types and developmental characteristics of geological disasters in Yanzi River Basin are analyzed. In this paper, three main failure modes and evolution processes of collapse geological hazards in the basin are summarized, and the stability of typical collapses is studied. The results show that the geological hazards of collapse in Yanzi River basin are mainly rock mass, small scale, compound type, medium low level and unstable collapse, and the collapse is mainly distributed in the main stream of Yanzi River in space. The main tributaries, river valley slopes and "Belt and Road", where human engineering activities are concentrated along the Kangxi-Yangba Highway, are mainly concentrated in July and September when the rainfall is relatively concentrated, and the failure mode of the collapse is mainly cataclysm-fall. Bending-toppling-slip, fragmentation-slip, and each failure mode evolved into a disaster after four stages, and the calculation of typical collapse stability showed that rainstorm was the leading inducing factor of collapse.
【作者单位】：东华理工大学;中国地质调查局水文地质环境地质调查中心;
【基金】：国家自然科学基金“降雨型高速远程滑体失稳机理与破坏过程研究”(41372332) 中国地质调查局地质调查项目“嘉陵江上游燕子流域地质灾害调查”(12120115045501)
【分类号】：P642.21

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