Slope monitoring optimization considering three-dimensional deformation and failure characteristics using the...

Area of Science:

• Geotechnical Engineering
• Geological Engineering
• Civil Engineering

Background:

• Traditional 2D slope analysis methods are insufficient for capturing complex 3D slope deformation and failure characteristics.
• Inadequate consideration of 3D factors in expressway slope monitoring leads to inefficient sensor placement, with too many in stable zones and too few in critical areas.
• Accurate monitoring is crucial for preventing slope failures and ensuring the safety of transportation infrastructure.

Purpose of the Study:

• To analyze the 3D deformation and failure characteristics of the Lijiazhai expressway slope using advanced numerical simulations.
• To determine potential 3D slope surface displacement trends, identify initial failure zones, and calculate the maximum depth of potential slip surfaces.
• To optimize the arrangement of monitoring networks by considering the 3D nature of slope behavior for improved safety and efficiency.

Main Methods:

• Employed 3D numerical simulations to model the Lijiazhai slope's behavior.
• Utilized the strength reduction method to analyze slope stability and failure mechanisms.
• Simulated and analyzed surface displacement trends and potential slip surfaces under various conditions.

Main Results:

• Identified distinct deformation regions within the slope, with Slope B exhibiting significantly larger displacements (exceeding 5 cm at the trailing edge) compared to Slope A.
• Determined that monitoring points should be concentrated in areas of high displacement, specifically identified as Region V.
• Successfully optimized the placement of surface and deep displacement monitoring networks to effectively cover the unstable/dangerous sections of the slope.

Conclusions:

• 3D numerical simulations are essential for accurately understanding and predicting the deformation and failure of complex slopes.
• Optimized monitoring strategies based on 3D analysis enhance the effectiveness of slope stability assessments for expressways.
• The findings provide valuable references for similar slope engineering projects, promoting safer and more efficient infrastructure development.