低势能滑坡束口聚能启程剧动机制研究——以深圳光明新区红坳建筑弃渣场滑坡为例

doi:10.13722/j.cnki.jrme.2024.0268

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Abstract In order to explore the formation mechanism of long-distance and high-speed movement of low potential energy landslides，a large-scale construction solid waste landslide，that occurred at a landfill at Guangming New District of Shenzhen，Guangdong，China，was selected as the research object. Based on the hypothesis of soil arching，the axis equation of soil arching and strain energy equation accumulated in soil arching are deduced. By catastrophe theory，the transformation and dissipation of the strain energy are analyzed. The starting kinetic energy of the landslide is determined，and according to the kinetic energy theorem，the starting speed of landslide is calculated. In this paper，the energy source of long-distance and high-speed movement of the low potential energy landslide is studied from a new perspective，Research suggests that：(1) Excess pore water pressure provides power for landslide initiation. (2) The special spoon-shape terrain provides topographic condition for the formation of soil arching，The special binary structure slope with dense leading edge and loose posterior edge provided material condition for the formation of soil arching. (3) The deformation of the slope is blocked by the soil arching，forming a stress concentration area，and a huge strain energy is accumulated in the soil arching. (4) The soil arching destroys suddenly，and part of the strain energy is converted into kinetic energy，The landslide starts up with a high speed，that is，the energy of high-speed movement mainly comes from strain energy rather than high potential energy.

Key words： slope engineering low-potential energy landslides spoon-shape terrain strain energy sudden departure

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ZHONG Xingrong. Study on sudden departure mechanism of low-potential energy landslides on account of massing energy by spoon-shape terrain—Taking the landslide of Hong?ao Village construction solid waste landfill in Guangming New District of Shenzhen，Guangdong，China as an example[J]. , 2024, 43(10): 2485-2496.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2024.0268 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I10/2485

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