Experiment and Analysis of Submarine Landslide Model Caused by Elevated Pore Pressure
Abstract
:1. Introduction
2. Experimental Models
2.1. Experimental Introduction
2.2. Experimental Device Design
2.2.1. Acrylic Model Box
2.2.2. Gas application System
2.2.3. Data Acquisition System
2.3. Description of Model Tests
2.3.1. Experimental Materials
2.3.2. Experimental Procedure
Setting up the Experimental Device
Setting up the Sensors
Preparation of SEABED
Data Acquisition
3. Experimental Results and Phenomena
3.1. Collapse Deformation
3.2. Shear-Slip Failure
4. Discussion of Experimental Phenomena
4.1. Collapse Deformation
4.1.1. 20-5 Model
4.1.2. 13-5 Model
4.2. Shear-Slip Failure
4.2.1. 13-8 Model
4.2.2. 8-10 Model
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Experiment Number | Seabed Thickness/D (cm) | Seabed Slope/α (°) | Water Height/h (cm) | Sand Layer Thickness/s (cm) |
---|---|---|---|---|
20-5 | 20 | 5 | 35 | 2 |
20-10 | 20 | 10 | 36 | 2 |
20-15 | 20 | 15 | 44 | 2 |
13-5 | 13 | 5 | 35 | 2 |
13-10 | 13 | 10 | 36 | 2 |
13-15 | 13 | 15 | 36 | 2 |
8-5 | 8 | 5 | 35 | 2 |
8-10 | 8 | 10 | 36 | 2 |
8-15 | 8 | 15 | 36 | 2 |
Properties Parameters | Value | |
---|---|---|
Moisture content (ω) | 28.3% | |
Density (ρ) | 2.0 g/cm3 | |
Dry density (ρd) | 1.55 g/cm3 | |
Specific gravity (Gs) | 2.7 | |
Void ratio (e) | 0.75 | |
Porosity (n) | 43% | |
Plasticity index (Ip) | 6.9 | |
Saturated unit weight (γs) | 16.0 kN/m3 | |
shear strength of uu test | Cohesion (c) | 7 kPa |
Internal friction angle (φ) | 20° |
Number | Thickness/D (cm) | Angle/α (°) | Failure Mode | Failure Time (s) | Failure Level (cm) |
---|---|---|---|---|---|
20-5 | 20 | 5 | Pockmark | 420 | 2; Diameter: 8 × 12.5, 9.6 × 6 |
20-10 | 20 | 10 | Pockmark | 380 | 1; Diameter: 29 × 25.3 |
20-15 | 20 | 15 | Pockmark | 335 | 1; Diameter: 40 × 35.7 |
13-5 | 13 | 5 | Pockmark | 290 | 2; Diameter: 24 × 20.3, 21.5 × 10.2 |
13-10 | 13 | 10 | Shear–slip failure | 190 | 2; Width: 5; Slip zone: 27 |
13-15 | 13 | 15 | Shear–slip failure | 150 | 1; Width: 9.5; Slip zone: 50 |
8-5 | 8 | 5 | Shear–slip failure | 90 | 2; Width: 4.3, 5; Slip zone: 59 |
8-10 | 8 | 10 | Shear–slip failure | 80 | 5; Width: 3.5; Slip zone: 62 |
8-15 | 8 | 15 | Eruption failure | 20 | Overall liquefaction |
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Liu, T.; Lu, Y.; Zhou, L.; Yang, X.; Guo, L. Experiment and Analysis of Submarine Landslide Model Caused by Elevated Pore Pressure. J. Mar. Sci. Eng. 2019, 7, 146. https://doi.org/10.3390/jmse7050146
Liu T, Lu Y, Zhou L, Yang X, Guo L. Experiment and Analysis of Submarine Landslide Model Caused by Elevated Pore Pressure. Journal of Marine Science and Engineering. 2019; 7(5):146. https://doi.org/10.3390/jmse7050146
Chicago/Turabian StyleLiu, Tao, Yueyue Lu, Lei Zhou, Xiuqing Yang, and Lei Guo. 2019. "Experiment and Analysis of Submarine Landslide Model Caused by Elevated Pore Pressure" Journal of Marine Science and Engineering 7, no. 5: 146. https://doi.org/10.3390/jmse7050146
APA StyleLiu, T., Lu, Y., Zhou, L., Yang, X., & Guo, L. (2019). Experiment and Analysis of Submarine Landslide Model Caused by Elevated Pore Pressure. Journal of Marine Science and Engineering, 7(5), 146. https://doi.org/10.3390/jmse7050146