The Study Of The Stability Of The High And Swelling Weak Rock Slope In Freeway

The national highway of Dandong-Lasha (110 national highway) is a backbone highway artery of the national west-east direction, and the traffic main artery of the development of the West Regions, Following the rising of our country mains, the problem about geology of mountainous area of the highway building is becoming outstanding. So this article puts forward the advice about the integrated control countermeasure of the slope, through taking the state specific geological environment of Hohhot-Jining freeway(one part of the national highway of Dandong-Lasha) as the background, Regarding the landslide of K401+050 ~ K401 + 400 segment, K430+850-K431+400 segment, K449+456.5 ~ K449 + 600 segment and K453+200~+800 segment of the Hohhot-Jining freeway as the research object.And assessment the stability fo slope in the method of integrated geological analysis and finite element analysis. and find a general prophylactico-therapeutic measures.The geology condition around Hu-Ji freeway is very complicated, joints is developing in the drilled area of deep cutting, and there are much expansive incompetent bed , which mainly contains weaker plaster rock and shale break. The slope cutting in highway construction changed the primary balance of the slope. The effect of inward and outward factors, decreased the intensity and stability of the slope, which leads to the slope's imbalance. Selected one representation segment from the four canonical segments of the Hohhot-Jining freeway, calculated its stability in the FEM way.Associatived with geology way and FEM way, Conplex Evaluated the stability of the selecting part in the comprehensive analysis measure.At present, according to the element, developing phase and character that cause the slope, the principle countermeasure to the slope are decreasing slope, decreasing loads, drain off water, sustain, counter pressure, grouting and anchoring ect. According to the character of the expansion of the weaker plaster rock Hu - Ji freeway,The paper presented the conclution and prophylatico-therapeutic measures recommendations for this kind of similarity slope.For formatting a slope protective system.Through the study to the protection policy and measure of the slope research of Hohhot-Jining freeway, it would be an extensive reference significance and practical value to the highway construction in the development of the West Regions.