Study on Anti-Slide Stability of Rock Slope along River: Fid-Bau Portal

Study on Anti-Slide Stability of Rock Slope along River

Luo, Wei / Li, Liang / Zhao, Lian-heng / Cheng, Pan / Chen, Jia-qi

Based on the assumption that the hydrostatic pressure is maximum at half the total groundwater level, which improved the groundwater pressure distribution in the slope body, the safety factor expression for anti-slide stability of the rock slope along the river were deduced using the limit equilibrium theory. This deduction included various influencing factors, such as slope-top surcharge, seismic load, anchor load, river pressure on the slope surface, groundwater pressure, and scouring effect. The relationship diagrams between the safety factor and the influencing factors were constructed. Results show that the new assumption, which improved the hydrostatic pressure distribution, is reasonable. Hydrostatic pressure is an important influencing factor to the slope anti-slide stability. The higher river water level and the lower groundwater level are beneficial to improve the safety factor of the slope anti-slide stability. Whether the outflow joint blocking has significant effect on the slope stability against sliding, the outflow joint blocking has adverse effect on anti-slide stability of the rock slope along the river in the general case. The anti-slide stability safety factor of the outflow joint blocked is larger than that of the outflow joint unblocked only when $H_{r} > H_{w}$ .