| The construction of national infrastructure, especially the construction of high grade highways, to meet the needs of linear, it will produce a lot of high cutting slope. Their lithological conditions are different. Under the influence of excavation disturbance and rainfall, failure may occur in low intensity rock mass, causing losses of life and property. Engineering practice shows that most of the slope failure occurred in structures such as faults, weak interlayer surface, therefore, to carry out the fault fracture zone of high cutting slope stability analysis and protection technology research is necessary.Based on the representative high slope engineering of Gaoping to Qinshui highway, through field research, theoretical analysis and numerical simulation study on the failure mode and mechanism of slope, analysised the stresses and deformations of slope after slope excavation and level at the present stage, evaluated slope stability at natural and storm conditions. Research results showed that: the slope damage form to "slip-pulled crack" mainly, easy occurred folding linear sliding, weak interlayer of slope and rainfall infiltrated is its damage of main factors; Under the condition of the heavy rain, the slope is in unstable condition, rainfall on slope at this stage of stability effects larger, after the first level slope excavation, the slope safety factor is reduced, the maximum horizontal displacement is increased, stress redistribution, slope toe appeared stress concentration phenomenon. And, put forward to the micro steel tube pile + anchor cable anti-slide pile + prestressed anchor rope ground beam + upward inclined scupper as the forms of governance of the slope.Research results can provide theoretical and technical guidance for relying on the project, and the design and protective of rock cutting slope of highway has certain reference value. |
