翟淑花,于家烁,齐干,刘欢欢,冒建,王云涛

• 1:北京市地质灾害防治研究所
• 2:中国地质环境监测院

摘要(Abstract)：

堆积体边坡稳定性判别和分析是地质灾害防治重点，分别以密实细颗粒边坡和松散碎石体边坡为例，开展了降雨入渗作用下坡体失稳室内模型试验，系统分析了密实度、物质组成、坡度以及植被覆盖度对边坡稳定性和降雨阈值的影响。结果表明，降雨入渗作用下，物质组成较均匀、密实度高的细颗粒边坡稳定性较好，坡体失稳降雨阈值高，致灾性较低；物质组成不均、松散碎石体边坡相较于密实细颗粒边坡更容易失稳破坏，含石量对坡体稳定性的影响要大于坡体坡度；坡体失稳临界降雨量随植被覆盖度的增大先升高后降低，即当降雨入渗致使边坡土体过饱和时，较高的植被覆盖度反而会由于植被根系的强发育，触发坡体和植被整体破坏，并加大坡体致灾能力。研究成果可以为堆积体边坡失稳机理研究及其稳定性评价提供理论依据。

关键词(KeyWords)： 密实细颗粒边坡;松散碎石体边坡;体积含水率;孔隙水压力;植被覆盖度;降雨入渗

Abstract:

Keywords:

基金项目(Foundation): 北京市自然科学基金项目(8202026;8182022);; 国家重点研发计划课题(2019YFC1509604)

作者(Author): 翟淑花,于家烁,齐干,刘欢欢,冒建,王云涛

DOI: 10.19509/j.cnki.dzkq.tb20220488

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