Study On Stability Of Accumulation Of Rock Mass In Highway Projects

Accommodation highways for external access of Xiluodu hydroelectric station in Yunnan is the main channel linking it to the outside, these roads are of momentous significance for the construction of the hydroelectric station, the geologic and executive conditions are very abominable, and the geologic conditions are extremely complex. Because of the confining of the geologic conditions of river valleys, the roads go through the accumulation of rock mass in complex geologic conditions, most of slops forming in the construction of road are composed of accumulation of rock mass in bad stability, the existence of slops in this kind bring great influence in the construction and operation of accommodation highways. The stability of slops is very important.Through the analysis of stability in accommodation highways of typical slop K20,this paper builds three dimensional space numerical model and two dimensional numerical model with FLAC^3D , counting parameters of accumulation of rock mass are discussed and determined .Comparison is made between three dimensional and two dimensional results. Strain field of slops are simulated before excavation, after excavation and construction.In numerical model, the buoyancy water cause to soil mass and the influence rainfall brings to the stability of slop are considered.In two dimensional numerical model .Reinforced effect of spud for antis lip, anchor cable, geogrid to real slops are analyzed and evaluation of degree of safety in slop stability is given. No â…  and No â…¡ slop that appeared during the process of roads excavation in K35, together with potential slop No â…¢, No â…£ are analyzed in stability. ANSYS is also used to analyze the stability of slops; Comparison has been made between ANSYS and FLAC, making the result more reliable.