Stability Analysis And Anti Slide Pile Optimization Of A High Slope In Anjiang Expressway

Slope is a kind of slope formed by natural or man-made influence,and it is also a kind of geological form commonly seen in construction engineering.With the rapid development of Expressway in mountain area,more and more high slopes appear.There are many high slopes along the highway with steep terrain and complex geological conditions.The slope engineering stability and support methods have always been concerned by people.Based on the treatment project of some section of high side slope of Anjiang expressway,this paper analyzes the stability of the slope under various working conditions and takes reasonable reinforcement measures to fundamentally solve the highway disease,and on this basis,studies.In this paper,based on FLAC30 software,the stability of the slope is calculated and analyzed,and the slope is strengthened by Anti slide pile in rainy season.Based on FLAC3D software,the parameters of Anti slide pile are optimized,and the layout of Anti slide pile is optimized.The main conclusions are as follows:(1)Through FLAC3D software calculation,the slope stability coefficient under natural and rainy season conditions is 1.14 and 1.03 respectively.From the angle of slope stability coefficient,it can be judged that the slope is basically stable under natural empty condition and under stable under rainy season condition,so the slope needs to be strengthened accordingly.(2)Based on FLAC3D,the three-dimensional model of high slope in rainy season is established,and the pile position,pile length and pile spacing of Anti slide pile are optimized.Through modeling,simulation,calculation and analysis,it is concluded that when the Anti slide pile is located on the secondary platform(position ?),the reinforcement effect is better than other pile positions.The longer the pile length is,the greater the Anti sliding effect will be,but when the pile length is more than 30 m,the increase of Anti sliding effect will not be significant with the increase of pile length.With the increase of pile spacing,the blocking effect of Anti slide pile on slope is gradually weakened.When the distance between piles is more than 8m,the effect of slope reinforcement is close to that without piles.The best pile spacing is 5m.(3)The optimized anti-slide piles are arranged on the secondary platform of the slope,the length of the piles is 30m and the spacing of the piles is 5m.The total displacement,horizontal displacement and vertical displacement of the slope are very small and tend to 0.The Stability Coefficient of the slope is 1.31,which meets the requirements of the standard design,the slope is in a stable state,and the length of pile is reduced from 32 m to 30 m,which not only reduces the cost of the project,but also improves the stability of the slope and avoids the emergence of hidden dangers in the later stage,in this chapter,the optimization of the Slope Design Scheme improves the economy of the construction,and puts forward the most reasonable treatment measures.