Research On The Construction Response And Control Of Mixed Rock-soil High Slop

In the background of the topic "Study on Construction Safety of mixed rock-soil high slope and its Influence factors", this thesis takes the typical mixed rock slop in K79+840-K80+000(left) under the fourteen section of the contract about Da(Wei Shang)-Liu(Yang) expressway as research object. A detailed analysis about the influence that the physical properties, mechanical properties, deformation features, Support Measure, and different construction technique do to slop deformation by using the numerical software of FLAC3D are made.Based on the rock mass structure and mineral identification experiment, the mistake of naming the lithology is revised, what’s more, the certain slope failure position, scale and type of the rock slop caused by excavation are analyzed qualitatively. Adapting the revised SMR (that is GSMR) and experimental method, comparing and analyzing the rock and soil mass mechanical parameters, a mechanical parameter which suits this type of interbedded mixed rock slop perfectly is calculated. Comparing and analyzing the deformation response about the mixed rock-soil slop and common layered rock slop caused by excavation, the conclusion about the deformation characteristics and its special engineering property is achieved; the failure position and failure mode where could be destroyed easiest caused by excavation from the aspect of stress field and displacement field is known. Besides, according to the excavation deformation features, the single ideal excavation height of this slope came out. Al last, by controlling the safety factor and dangerous slide surface, the research about the reinforcement scheme and puts forward a rational reinforcement construction technique about slop excavation is made.Through a systematic research, an important conclusion about the construction response influence about the mixed rock-soil slop caused by excavation is known. By connecting the excavation deformation features, the reinforcement measure and construction technique are studied, which has guiding significance and reference value to the designation and construction of this special slope.