基于光弹测试技术的颗粒柱坍塌启动细观行为分析

doi:10.3799/dqkx.2026.173

基于光弹测试技术的颗粒柱坍塌启动细观行为分析

doi: 10.3799/dqkx.2026.173

戴国威¹,
毛无卫^1,2,
黄雨^1,2,
郑虎^1,2, ,

1. 同济大学土木工程学院地质与水利工程系, 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

基金项目:

国家自然科学基金项目(42277156)。

详细信息

作者简介:
戴国威(1998-),男,博士研究生,主要从事颗粒物质力学、工程地质灾害等研究。E-mail:Daigw@tongji.edu.cn,ORCID:0000-0003-2477-7618

通讯作者:
郑虎(1986-),男,教授,博士生导师,主要从事地质灾害防治与岩土颗粒物质力学研究.E-mail:zhenghu@tongji.edu.cn,ORCID:0000-0002-9606-9947

中图分类号: P642.22
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- 文章访问数: 76
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出版历程
- 收稿日期: 2026-02-28
- 网络出版日期: 2026-06-29

Microscopic initiation behavior analysis of granular column collapse based on photoelastic technology

Guowei Dai¹,
Wuwei Mao^1,2,
Yu Huang^1,2,
Hu Zheng^{1,2
, ,}

1. Department of Geological and Hydraulic Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China

摘要

摘要: 为揭示突发型滑坡启动过程的细观动力学机制，本研究基于光弹性测力技术与颗粒柱坍塌物理模型，实现了岩土颗粒材料在瞬态启动阶段颗粒位移与力链网络演化的同步系统观测。结果表明，滑坡启动过程中力链断裂重组与剪切带形成在时空上具有高度一致性。在形成稳定颗粒流之前，颗粒加速阶段与体系内部应力水平的快速衰减呈显著相关，表明应力释放是驱动滑坡突发启动的重要动力学机制。进一步分析发现，突发型滑坡启动过程中颗粒尺度动力学行为可划分为两种不同模式：一是滑动区内颗粒沿主滑移方向发生系统性位移；二是非滑动区内颗粒表现出不规则的非局域位移特征，该非局域运动主要受局部剪切扰动及力链传递过程控制。
- 颗粒启动 /
- 光弹性技术 /
- 力链网络 /
- 突发型滑坡
Abstract: To elucidate the mesoscopic mechanisms underlying the initiation of sudden-failure landslides, this study employs photoelastic experimental techniques combined with a granular column collapse model, to achieve simultaneous observation of granular displacement and force-chain network evolution during the transient initiation stage. The results reveal a strong spatiotemporal consistency between the evolution of the internal force-chain network and the formation of shear bands (failure line). Prior to the development of granular flow, particle acceleration is closely correlated with a reduction in the internal stress level of the system. At the particle scale, the initiation process can be characterized by two distinct dynamic patterns: systematic displacement within the sliding zone and irregular nonlocal displacement in the non-sliding zone, the latter being primarily driven by localized shear fluctuations and stress transmission within the granular assembly.
- granular initiation /
- photoelastic technology /
- force chain network /
- sudden-failure landslide

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参考文献(40)

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基于光弹测试技术的颗粒柱坍塌启动细观行为分析

doi: 10.3799/dqkx.2026.173

作者简介:
戴国威(1998-),男,博士研究生,主要从事颗粒物质力学、工程地质灾害等研究。E-mail:Daigw@tongji.edu.cn,ORCID:0000-0003-2477-7618

通讯作者:
郑虎(1986-),男,教授,博士生导师,主要从事地质灾害防治与岩土颗粒物质力学研究.E-mail:zhenghu@tongji.edu.cn,ORCID:0000-0002-9606-9947

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Microscopic initiation behavior analysis of granular column collapse based on photoelastic technology

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留言板

基于光弹测试技术的颗粒柱坍塌启动细观行为分析

doi: 10.3799/dqkx.2026.173

作者简介: 戴国威(1998-),男,博士研究生,主要从事颗粒物质力学、工程地质灾害等研究。E-mail:Daigw@tongji.edu.cn,ORCID:0000-0003-2477-7618

通讯作者: 郑虎(1986-),男,教授,博士生导师,主要从事地质灾害防治与岩土颗粒物质力学研究.E-mail:zhenghu@tongji.edu.cn,ORCID:0000-0002-9606-9947

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出版历程

Microscopic initiation behavior analysis of granular column collapse based on photoelastic technology

计量

出版历程

目录

作者简介:
戴国威(1998-),男,博士研究生,主要从事颗粒物质力学、工程地质灾害等研究。E-mail:Daigw@tongji.edu.cn,ORCID:0000-0003-2477-7618

通讯作者:
郑虎(1986-),男,教授,博士生导师,主要从事地质灾害防治与岩土颗粒物质力学研究.E-mail:zhenghu@tongji.edu.cn,ORCID:0000-0002-9606-9947