Stability Analysis On High Cut Slopes Along Riverside Highway

There are three methods often used when evaluating stability of high cut rock slope, which includes rigid block limiting equilibrium method, emperical method and numerical analysis approach. So far the the new roadbed design code is based upon the first of these methods. However, a stability evaluation method for high and steep slope is not only concerning about general mechanics, but also about engineering geology subject and rock mass mechanics. So ascertaining the geological mode, deformation and failure mechanism of high slope, is fundamental to slope stability evaluation and reinforcement. The geological condition and hydrogeologic condition is the key factor to slope stability, the deformation damage mechanism and mode of slope. However, the geological condition and hydrogeologic condition are always different as the site varies, so there is almost no slope which can totally copy the experiences from the other slopes. As a result, it is necessary to study the site condition in order to analyze the stability with different specific site.In the thesis 14 high rock slope are chosen, which lay aboard a river in Guangdong province as the fucus of the study. Detailed studies are made as follows: Searching the key internal factors which can affects slope stability. According to the geological data which was gained by exploration investigation, establishing a geological model which can reflect rock mass characteristics;With analyzing the internal and exterior factors synthetically, the deformation and possible failure mechanism and mode of the cut slopes was confirmed which combines with stereoic projection and other techniques;The stabilities of the 14 high slopes are estimated synthetically by applicable design codes and guidelines. With the estimate result and some other analysis methods, the rock mass mechanical parameters of slope are identified;As a results, 14 high slopes fall into 4 categories based on rockmass characteristics and discontinuities. The stability and deformation of some typical slopes was analyzed with distinct element method by UDEC;The safety factor of some dangerous slopes are calculated by rigid limiting equilibrium method for coMParison. The above analysis shows some results as follows: Generally the discontinuities including bedding planes are favor to the stability of slope, which means that most of the slopes will not suffer large sliding failure;Most of the high slopes situated in the interest area are stable. However there are some potential unstable wedges which can be identified based on the key block theory;Some suggestions for reinforcing high slope are presented based on the stability analysis and environmental friendly consideration.This results of the paper could be of help in design and excavation of the other similar slopes. Since thegeological conditions in the interest area is typical, the drawn conclusions will not only...