考虑动态渗流的散粒体滑坡-涌浪过程两相SPH模拟

彭铭; 赵庆新; 李爽; 褚卫江; 朱艳; 葛向铭; 陈昉健

doi:10.3799/dqkx.2025.100

Volume 50 Issue 10

Oct. 2025

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Article Navigation > Earth Science > 2025 > 50(10): 3795-3808

Peng Ming, Zhao Qingxin, Li Shuang, Chu Weijiang, Zhu Yan, Ge Xiangming, Chen Fangjian, 2025. Two-Phase SPH Simulation of Granular Landslide-Tsunamis Processes Considering Dynamic Seepage. Earth Science, 50(10): 3795-3808. doi: 10.3799/dqkx.2025.100

Citation:

Peng Ming, Zhao Qingxin, Li Shuang, Chu Weijiang, Zhu Yan, Ge Xiangming, Chen Fangjian, 2025. Two-Phase SPH Simulation of Granular Landslide-Tsunamis Processes Considering Dynamic Seepage. Earth Science, 50(10): 3795-3808. doi: 10.3799/dqkx.2025.100

Citation:

Peng Ming, Zhao Qingxin, Li Shuang, Chu Weijiang, Zhu Yan, Ge Xiangming, Chen Fangjian, 2025. Two-Phase SPH Simulation of Granular Landslide-Tsunamis Processes Considering Dynamic Seepage. Earth Science, 50(10): 3795-3808. doi: 10.3799/dqkx.2025.100

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Two-Phase SPH Simulation of Granular Landslide-Tsunamis Processes Considering Dynamic Seepage

doi: 10.3799/dqkx.2025.100

Peng Ming^{1, 2
,
,},
Zhao Qingxin^{1, 2},
Li Shuang^{1, 2
,
,},
Chu Weijiang³,
Zhu Yan⁴,
Ge Xiangming³,
Chen Fangjian⁵

1.
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
2.
College of Civil Engineering, Tongji University, Shanghai 200092, China
3.
PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China
4.
China Shipbuilding NDRI Engineering Co., Ltd., Shanghai 200063, China
5.
School of Civil Engineering & Architecture, Xiamen University of Technology, Xiamen 361024, China

Received Date: 2025-04-26
Publish Date: 2025-10-25

Abstract

Abstract

The landslide-tsunami is a typical multi-hazard coupled system, characterized by complex effects resulting from the transmedia transformation of hazards. In this paper it proposes a two-phase Riemann-SPH model for landslide-tsunami simulation that incorporates dynamic seepage and is validated against laboratory experiments. The incorporation of dynamic seepage effects enhances the completeness of the momentum exchange mechanism in the granular landslide-tsunami process, reducing the errors in the maximum wave amplitude (a_m) and maximum wave height (H_m) by at least 24.72% and 41.95%, respectively. The results reveal a synergistic regulation of tsunami characteristics by the sliding surface inclination (α) and the landslide leading edge inclination (β): as α increases, the a_m and H_m exhibit a single-peaked, nonlinear increase-then-decrease trend. The influence of β shows a distinct piecewise pattern: when α+β < 90°, both a_m and H_m increase significantly with the angle. Beyond this threshold, non-monotonic variations appear, reflecting a competition between the increasing landslide volume and the decreasing effective impact area. Moreover, increasing α enhances seepage, turbulent and frictional dissipation effects, accelerating energy decay. These findings provide scientific support for the mitigation of landslide-tsunami hazards.
- landslide-tsunami hazard chain,
- Riemann-SPH,
- dynamic seepage,
- sliding surface inclination,
- landslide leading edge inclination,
- fluid-soil coupling,
- engineering geology

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References(47)

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Two-Phase SPH Simulation of Granular Landslide-Tsunamis Processes Considering Dynamic Seepage

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