重大滑坡灾变机制与防治新技术研究

doi:10.13722/j.cnki.jrme.2022.1308

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Abstract Major engineering constructions in China are frequently impacted by landslide disasters due to the complicated geological environment and major engineering construction disturbances. Therefore，it is essential to accurately understand the disaster-induced mechanisms of landslides and develop advanced prevention and control technologies. In this context，the authors present a detailed analysis of the disaster-induced mechanisms of landslides and summarizes research progress in prevention and control technologies for major landslide disasters based on their research and practical experience. The mechanisms of landslides comprise the reasons，mechanical behaviors，and landslide processes，where the reasons can be internal or external and vary depending on the type of landslide. The mechanical behavior，namely sliding mechanical mechanism，of landslides can be summarized as the shear stress on the weak surface of a slope being greater than the shear strength. The sliding evolution process of landslides can be analyzed by examining the sliding properties and development stages of landslides. The sliding mechanical mechanism and sliding evolution process constitute the landslide disaster-induced mechanism. Taking the Huangshui River giant landslide in Qinghai Province as an example，this paper analyzes the landslide mechanism，clarifies the internal and external causes of the landslide，reveals the sliding mechanical mechanism，discovers the scientific phenomenon of large-scale landslide peristaltic deformation, creep sudden deformation, and sliding sudden deformation ，and establishes the disaster-induced mechanism of“long-term shear peristaltic deformation→local shear creep sudden deformation→overall penetration fracture sliding”of large-scale landslide. To address the strong retaining problem of deep and large landslides encountered in major projects，the authors propose two kinds of landslide strong retaining technologies：fully buried multi-anchored anti-sliding pile and deep-buried low-anchored variable section anti-sliding pile. These technologies optimize the anchor cable layout on the anti-sliding piles to optimize mechanical mode of retaining structure and to reduce the pile size and anchor cable length. Additionally，to solve the problem of low disturbance and fast control of landslide dangers in major engineering projects，the author develops three kinds of landslide low disturbance retaining technologies，namely vertical steel floral tube anchor cable，oblique steel floral tube anchor cable，and trenchless anchor cable anti-sliding pile. These technologies enable rapid control of disaster dangers. The author?s research results play a leading role in the research and prevention of major landslide disaster mechanisms.

Key words： slope engineering landslides mechanism analysis prevention and control technology anti-sliding piles

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	ZHANG Yufang
	FAN Jiawei
	YUAN Kun

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ZHANG Yufang,FAN Jiawei,YUAN Kun. Disaster-induced mechanisms and prevention and control new technologies of major landslides[J]. , 2023, 42(8): 1910-1927.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1308 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I8/1910

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