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李津瑋

（中鐵第一勘察設計院集團有限公司，陜西 西安 710043）

摘   要 ：為探究高速遠程滑坡碎屑流運動特征及機理，以丹扎木村試驗田滑坡為工程依托，采用物理模型試驗，通過滑坡碎屑流在運動過程中鏟刮基底松散堆積物的過程來研究滑坡動力鏟刮行為，并基于摩擦學基本理論對模型試驗觀測結果進行討論。結果表明：滑坡碎屑流對基底物質存在“ 高速沖擊剪切侵蝕行為 ”和“ 運動基底剪切行為 ”兩種鏟刮侵蝕模式；當坡度較陡時，碎屑流的運動距離更遠； 當鏟刮量更大時，碎屑流的能量隨著鏟刮體積的增大而增加 。所得結論為西南山區高位滑坡碎屑流的動力侵蝕模式提供了研究支撐。

關鍵詞 ：高速遠程滑坡 ；碎屑流 ；物理模型試驗 ；鏟刮效應 ；運動機制

中圖分類號 ：P642.22          

文獻標志碼 ：Ａ          

       文章編號 ：1005－8249（2023） 04-0008-07

       DOI：10.19860／j.cnki.issn1005-8249.2023.04.002

LI Jinwei

(China Railway First Survey and Design Institute Group Co.,Ltd., Xi’an ,710043，China )

Abstract: In order to explore the movement characteristics and mechanism of debris flow in high-speed and long-distance landslide, the physical model test was used to study the dynamic shoveling behavior of landslide through the process of scraping the loose accumulation of base during the movement of landslide debris flow. the observation results of model test are discussed based on the basic theory of tribology. The results show that there are two scraping erosion modes of landslide debris flow: “high speed impact shear erosion behavior” and “moving basement shear behavior”; when the slope is steeper, the movement distance of debris flow is longer; when the amount of scraping is larger, the energy of debris flow increases with the increase of scraping volume. The conclusions provide support for the research on the dynamic erosion model of high landslide debris flow in southwestern mountainous area.

Keywords：high-speed long-distance landslide; debris flow; physical model test; scraping effect; movement mechanism

?基金項目 ：國家重點研發計劃項目（２０１８ＹＦＣ１５０５００３）。

作者簡介：李津瑋（ １９８９—），男 ，碩士， 工程師，從事巖 土工程相關工作。

收稿日期 ：2022-03-28