1)How do construction, mining, and excavation alter slope stability?
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Construction, mining, and excavation activities can significantly impact slope stability. Various studies have delved into this issue. Excavation unloading in open-pit mines can lead to rock slope failure. Techniques like lattice beam construction with pre-set anchors have been proposed to enhance slope stability during construction and in the long term. Additionally, the influence of mining activities on slope stability has been explored using numerical simulation methods, showing that underground mining disturbances can cause horizontal movement and deformation in the slope. Moreover, factors such as structural surfaces, blasting vibrations, and mining areas can affect slope stability in open-pit mines, with numerical simulations revealing the stability under different conditions. These findings collectively highlight the complex interplay between construction, mining, excavation, and slope stability.
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| Papers (5) | Insight |
|---|---|
| Construction, mining, and excavation activities can lead to slope instability by causing horizontal movement and deformation, affecting subsidence values, altering critical sliding surfaces, and decreasing safety factors in the slope. | |
| Construction, mining, and excavation alter slope stability by introducing stress redistribution and displacements. Pre-anchoring with lattice beams enhances temporary and permanent slope stability during these activities. | |
| Construction, mining, and excavation alter slope stability by creating elevation differences, leading to gravitational soil movement. Factors like reduced effective stress and increased pore pressure can trigger landslides. | |
| Construction, mining, and excavation activities can impact slope stability by introducing structural surfaces, blasting vibrations, and changes in the mining area, influencing stability through self-weight stress and blasting forces. | |
| Construction, mining, and excavation induce slope instability by creating unloading conditions, affecting crack initiation angles, ultimate safe height, and slope stability factors, leading to potential slope collapse disasters. |
Related Questions
Why slope stability analysis is important ?5 answersSlope stability analysis is crucial due to its direct link to engineering safety. Understanding the stability of slopes is vital for various industries like water conservancy, civil engineering, and mining. Evaluating slope stability under different loading scenarios, including seismic events, is essential for ensuring the safety of structures like hydropower plants. Moreover, analyzing the stability of man-made slopes, such as those created during the disposal of phosphogypsum, is critical to prevent failures that could lead to environmental disasters. Deepening the knowledge of failure mechanisms, like toppling-sliding failures, through detailed geological investigations aids in predicting and preventing slope failures triggered by factors like rainfall. Additionally, assessing slope stability in high-risk areas, such as hilly environments prone to landslides, is crucial for implementing effective mitigation measures and reducing disaster risks.
How does soil excavation and changing affect soil stability in different soil types?5 answersSoil excavation and changing can have a significant impact on soil stability in different soil types. The stability of soil slopes during excavation work is crucial to prevent landslides. The safety factor of soil slopes decreases with increasing excavation depth and slope angle. An excavation controller for hydraulic excavators has been developed to adapt to different soil characteristics in real-time, using reinforcement learning and proprioceptive observations. Soil nail walls have been found to be an effective reinforcement system for providing stability against displacement in different soil types. Excavation-induced deformation and failure behavior in soil slopes overlying bedrock have been studied, with the shape of the bedrock influencing the significant influence area inside the slope. The embedded depth of support structures in braced excavation design can affect circular sliding stability, but spatial effects may allow for different design approaches.
How slope stability is analyzed?4 answersSlope stability is analyzed using various methods and techniques. One common approach is the use of factor of safety (FS) calculations. This involves evaluating the stability of a slope by comparing the resisting forces to the driving forces acting on it. The factor of safety is determined by considering factors such as soil cohesion, slope geometry, and external loads. Another method is the use of finite element analysis, which involves dividing the slope into smaller elements and analyzing their behavior under different conditions. This method allows for a more detailed analysis of slope stability and can consider factors such as strain-softening behavior of the soil. Additionally, reliability analysis techniques, such as Monte Carlo simulation, can be used to assess the probability of slope failure and calculate the reliability index. These methods take into account the spatial variability of soil properties and provide a more accurate assessment of slope stability.
What is the effect of soil piping on the stability of slopes?3 answersSoil piping can have both positive and negative effects on the stability of slopes. On one hand, soil pipes can act as effective drainage systems, reducing the build-up of pore water pressure and increasing slope stability. They can drain a certain amount of water from the soil layer, preventing excessive pore water pressure and potential instability. However, if the water supply exceeds the drainage capacity of the soil pipe, it can lead to an increase in pore water pressure and destabilize the slope. Additionally, if soil pipes become blocked, they can cause a rapid rise in pore water pressure and immediate soil mass movement. Overall, the presence of soil pipes can retard the development of positive pore water pressure and increase slope stability, but their effectiveness depends on factors such as drainage capacity and blockage.
How can the stability of a slope be improved by using piles?4 answersThe stability of a slope can be improved by using piles. Piles have been proven to be effective in stabilizing slopes and preventing slides. The optimal location for the piles is typically in the middle of the slope, as this yields the most favorable stabilization effect. Piles can also be used in combination with other slope improvement measures, such as drainage, to further enhance stability. When installed in a liquefiable slope, piles can help prevent lateral displacement of the soil and reduce bending moments on the pile. Additionally, bamboo piles have been found to be suitable for slope stabilization, as they provide high tensile strength and can increase slope stability. Overall, the use of piles is an advantageous and effective technique for improving the stability of slopes.
Stability of soils reinforced with geosynthetics in roads?5 answersSoils reinforced with geosynthetics in roads have shown to improve stability and mitigate adverse effects. Geosynthetic-reinforced soil (GRS) retaining walls in China exhibited structural problems due to inadequate backfill compaction, rainwater infiltration, settlement of foundation soil, and reinforcement aging. The use of geosynthetic reinforcement in mining areas has been beneficial in stabilizing unbound aggregate layers and mitigating the impact of horizontal tensile strains. Geosynthetics, such as geotextiles and geogrids, have been used to reinforce road embankments and ensure slope stability under seismic loading conditions. Geosynthetic reinforcement, particularly geogrids, has been found to reduce rutting and permanent deformations in unpaved roads under repeated traffic loads. In asphalt pavement, geosynthetics, such as geocells and geogrids, have been used to improve dynamic stability, bending creep rate, and fatigue life.