考虑基覆面形态影响的堆积层滑坡失稳机制数值模拟

doi:10.3799/dqkx.2025.276

考虑基覆面形态影响的堆积层滑坡失稳机制数值模拟

doi: 10.3799/dqkx.2025.276

章伟凯¹,
牛佳伦^1,2, ,,
幸金权^1,2,
陈会官^1,2,
赵程^1,2,
姜海西³

1. 同济大学土木工程学院地下建筑与工程系, 上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室, 上海 200092;
3. 上海城投公路投资(集团)有限公司, 上海 200335

基金项目:

国家自然科学基金(No.U22A20597, No.42407227)

详细信息

作者简介:
章伟凯 (1997-)，男，博士研究生，主要从事地质灾害研究. E-mail: 2210406@tongji.edu.cn. ORCID: 0009-0005-1076-5650.

通讯作者:
牛佳伦，助理研究员，主要从事岩土工程方向研究. E-mail: niujialun@tongji.edu.cn. ORCID: 0009-0003-3272-0459.

中图分类号: P642
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出版历程
- 收稿日期: 2025-07-23

Numerical simulation study on the instability mechanism of accumulation landslides considering the interface morphology

1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai 200092, China;
3. Shanghai Chengtou Highway Group Co., Ltd, Shanghai 200335, China

摘要

摘要: 为探究不同基覆面形态堆积层滑坡在降雨-库水作用下的失稳机制，依据三峡库区堆积层滑坡基覆面几何特征，建立了直线形、弧形、靠椅形、折线形四种典型基覆面概化模型，结合离散元数值模拟揭示了其力学响应规律、变形破坏模式及失稳机制。研究表明基覆面形态通过调控应力分布显著影响滑坡失稳模式：直线形和弧形滑坡表现出典型的牵引式破坏特征，靠椅形滑坡呈现明显的推移式变形特征，而折线形则整体呈现混合式变形破坏特点；降雨通过抬升中后部地下水位，增加范围内孔隙水压力，以激励滑坡变形。而库水位则通过调控前缘地下水位重分布，形成向外渗透水压，驱动前缘局部牵引变形。研究成果可为类似堆积层滑坡失稳及灾害防治提供依据。
- 堆积层滑坡 /
- 三峡库区 /
- 基覆面形态 /
- 离散元 /
- 失稳机制
Abstract: To investigate the instability mechanisms of such landslides with different interface morphology, four typical interface morphology was established based on the geometric characteristics of accumulation landslides in the three gorges reservoir area, namely, line-like shape, arc-like shape, chair-like shape, and step-like shape. Discrete element methods were conducted to elucidate mechanical response laws, failure modes, and instability mechanisms. Key findings reveal that the failure modes are governed by the interface morphology through its control of internal stress distribution. The line-like shape and arc-like shape exhibit typical retrogression failure characteristics, whereas the chair-like shape manifest pronounced progressive deformation, while the step-like shape landslide has the composite failure characteristics. Rainfall primarily drives deformation by elevating groundwater levels in the mid-rear sections, increasing pore water pressure. Conversely, reservoir water level fluctuations redistribute groundwater pressure near the toe, generating outward seepage forces that induce localized retrogressive deformation. These findings provide a scientific basis for analyzing instability mechanisms and designing prevention strategies for analogous accumulation landslides.
- accumulation landslide /
- three gorges reservoir /
- interface morphology /
- discrete element method /
- instability mechanism

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参考文献(58)

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考虑基覆面形态影响的堆积层滑坡失稳机制数值模拟

doi: 10.3799/dqkx.2025.276

作者简介:
章伟凯 (1997-)，男，博士研究生，主要从事地质灾害研究. E-mail: 2210406@tongji.edu.cn. ORCID: 0009-0005-1076-5650.

通讯作者:
牛佳伦，助理研究员，主要从事岩土工程方向研究. E-mail: niujialun@tongji.edu.cn. ORCID: 0009-0003-3272-0459.

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Numerical simulation study on the instability mechanism of accumulation landslides considering the interface morphology

计量

目录

留言板

考虑基覆面形态影响的堆积层滑坡失稳机制数值模拟

doi: 10.3799/dqkx.2025.276

作者简介: 章伟凯 (1997-)，男，博士研究生，主要从事地质灾害研究. E-mail: 2210406@tongji.edu.cn. ORCID: 0009-0005-1076-5650.

通讯作者: 牛佳伦，助理研究员，主要从事岩土工程方向研究. E-mail: niujialun@tongji.edu.cn. ORCID: 0009-0003-3272-0459.

计量

出版历程

Numerical simulation study on the instability mechanism of accumulation landslides considering the interface morphology

计量

出版历程

目录

作者简介:
章伟凯 (1997-)，男，博士研究生，主要从事地质灾害研究. E-mail: 2210406@tongji.edu.cn. ORCID: 0009-0005-1076-5650.

通讯作者:
牛佳伦，助理研究员，主要从事岩土工程方向研究. E-mail: niujialun@tongji.edu.cn. ORCID: 0009-0003-3272-0459.