| With the rapid development of China's economy,the country's capital construction has gradually increased,while we actively reform the nature,many natural disasters are frequently exposed.Slope protection engineering is one of the more common problems,if improper treatment will lead to landslides,collapses,debris flows and other major geological disasters,not only causing huge economic losses but also a serious threat to the safety of people's lives and property.Accurate evaluation of slope stability is an important prerequisite for slope protection works.Because of the complex shape of the slope in a certain section,several typical sections are often selected for stability analysis and calculation in two-dimensional state in actual treatment design,and generally considered to be partial safety.In the three-dimensional state,different slope shapes may affect the overall stability of the slope due to the existence of soil lateral pressure in theory.Based on the engineering background of a wedge landslide on a highway cutting slope in Hunan Province,a three-dimensional finite element model is established by using MIDAS-GTS software,and the influence of the inclination angle of both sides of the wedge landslide on the stability of the landslide is analyzed and studied.Research shows:(1)The main plastic zones of the three-dimensional wedge landslide are at the bottom of the landslide and the sliding zones on both sides of the landslide.(2)In the range of 0-75,the larger the slope angle,the better the stability of the landslide.When the slope angle exceeds 75_,the influence on the stability of the landslide is not obvious.(3)under the condition of other factors unchanged,the landslide stability coefficient calculated by three-dimensional space problem is slightly larger than that calculated by two-dimensional plane stability.That is to say,in practical engineering,it is safe to simplify the slope stability problem into plane problem analysis. |
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