基于CEL的灵敏性黏土斜坡渐进破坏数值模拟研究

沈佳轶; 陈前; 库猛; 王立忠

doi:10.11779/CJGE202212017

基于CEL的灵敏性黏土斜坡渐进破坏数值模拟研究 English Version

沈佳轶^{1, 2,},
陈前¹,
库猛¹,
王立忠^{1, 2}

1.
浙江大学海洋学院，浙江舟山 316000
2.
浙江大学浙江省海洋岩土工程与材料重点实验室，浙江杭州 310058

基金项目:

中央高校基本科研业务费专项基金项目 2021QNA4037

国家自然科学基金项目 51939010

详细信息

作者简介:
沈佳轶(1983—)，男，副教授，主要从事边坡及地下工程、岩体强度理论和海洋岩土工程的研究。Email: jiayi@zju.edu.cn

中图分类号: TU43
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出版历程
- 收稿日期: 2021-11-10
- 网络出版日期: 2022-12-13
- 刊出日期: 2022-11-30

Numerical simulation of progressive failure of sensitive clay slopes using CEL method

SHEN Jia-yi^{1, 2,},
CHEN Qian¹,
KU Meng¹,
WANG Li-zhong^{1, 2}

1.
Ocean College, Zhejiang University, Zhoushan 316000, China
2.
Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 为了揭示灵敏性黏土斜坡渐进破坏机理，以加拿大Saint-Jude滑坡为研究案例，采用耦合欧拉-拉格朗日（Coupled Eulerian-Lagrangian，CEL）框架下的欧拉方法，开展灵敏性黏土斜坡渐进破坏数值模拟研究。研究结果表明：CEL数值模拟得到的Saint-Jude滑坡地形与现场勘测滑坡地形基本一致；CEL数值模拟方法可以有效地模拟灵敏性黏土斜坡从初始失稳破坏到后续渐进破坏的全过程，真实还原Saint-Jude滑坡的渐进破坏模式；CEL数值模拟方法有效地模拟灵敏性黏土斜坡渐进破坏过程中剪应力的演化特征，从而揭示灵敏性黏土斜坡渐进破坏机理。
- 灵敏性黏土 /
- 应变软化 /
- Saint-Jude滑坡 /
- 渐进破坏 /
- CEL数值分析
Abstract: In order to reveal the mechanism of the progressive failure of sensitive clay slopes, the Saint-Jude landslide in Canada is used as a research case, and the Eulerian approach under the coupled Eulerian-Lagrangian (CEL) framework is used to carry out the numerical simulation. The research results show that: (1) The topography of the Saint-Jude landslide obtained by the CEL numerical simulation is basically consistent with the field surveyed one. (2) The CEL numerical simulation method can effectively simulate the sensitive clay landslides from the initial instability failure to the subsequent progressive failure, and the progressive failure mode of the Saint-Jude landslide can be truly simulated. (3) The CEL numerical simulation method effectively captures the characteristics of shear stress during the progressive failure of the sensitive clay slope, thereby revealing the mechanism of progressive failure of sensitive clay slopes.
- sensitive clay /
- strain softening /
- Saint-Jude landslide /
- progressive failure /
- CEL numerical analysis

HTML全文

图 1 灵敏性黏土斜坡渐进破坏^[6]

Figure 1. Progressive failure of sensitive clay slope ^[6]

下载: 全尺寸图片幻灯片

图 2 Saint-Jude滑坡^[1]

Figure 2. Saint-Jude landslide ^[1]

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图 3 断面B-B'的地形图^[1]

Figure 3. Topographic section B-B' ^[1]

下载: 全尺寸图片幻灯片

图 4 欧拉公式的算子分裂^[17]

Figure 4. Operator splitting of Eulerian formulation^[17]

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图 5 Saint-Jude滑坡示意图

Figure 5. Diagram of Saint-Jude landslide

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图 6 Saint-Jude滑坡渐进破坏等效塑性应变云图

Figure 6. Contours of equivalent plastic strain of progressive failure of Saint-Jude landslide

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图 7 Saint-Jude滑坡渐进破坏剪应力云图和底部剪应力分布

Figure 7. Contours of shear stress of progressive failure of the Saint-Jude landslide and distribution of bottom shear stress

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表 1 Saint-Jude滑坡土体力学参数^[1]

Table 1 Mechanical parameters of soil of Saint-Jude landslide ^[1]

参数	重度γ/(kN·m^-3)	弹性模量E/MPa	泊松比 $\nu$	峰值不排水抗剪强度τ_p/kPa	残余不排水抗剪强度τ_r/kPa	参考等效塑性应变 $\bar \kappa$
灵敏性黏土	16.0	10	0.49	45	1.6	1.6
覆土	18.6	10	0.49	75	—	—

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参考文献(18)

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