Research On Bedding Landslide Form K28 To K32 Of The Changzhi To Jincheng Express Highway

The study background is the engine harness of bedding rock landslide of Changzhi-Jincheng express highway. In the light of the research of six bedding rock landslide in it, taking three representative sections as object, it includes K28+700-K29+100, K31+160-K31+460 and K32+060-K32+200 sections. Such selection laid a steady foundation in order to analysis of bedding rock landslide.Beginning from natural geographic environment where the landslide locates, on the basis of collected many basic dates of landslide area, it analyzes the condition of engineering geology and fundamental character where the bedding rock landslide. The reason of the bedding rock landslide is discussed and geology environment, water-rock action, creep and human activity are also studied.According to face of structure that is the key location to keep stability of slope, it analyzes the change of physical and mechanical character of feeble interlayer on the effect of rock stress, rainfall action and weathering. Through analysis of underwater quality and extractive test on-site, the data about the water-rock action was provided. On the basic of result of creep test, it shows the character that counteract-shear intension of sliding zone will decrease as time goes on. Analyzing the action of human activity makes clear that irrational excavation leads to obviously decrease in aspect of stability of slope. Furthermore, frequent blast aggravated the instability of slope. On the basic of research, it indicates that ruling factor of landslide form is humanity activity, controlling factor is feeble interlayer, prompting factor is rainfall, effective factor is water-rock action and weathering.By using monitoring, the potential sliding zone in effected range of cutting area is determined and through test, analogy, back calculation and expert experience the value of cohesion internal friction angle C, φ of sliding zone are also precisely determined. Based on the above mentioned and taking K31+160-K3 6+460 section as an example, it carries out calculation of critical slope length and model of relax area so that it can determine unstable range of a slope under a certain safety fact and provide basic information for control engineering.By using calculation of numerical model, it carries out model of mechanic situation of slope in different institution during the excavation and control period and figured out the result of stress, displacement state in each period. In the light of the result, it carries out analysis of stability of slope and finds out that the key section of the control of the stability is the feeble interlayer. Based on comparingeffect before and after harness of engine, it analyzes the performance of engine. Finally, using the calculation of limited balance, the stability of slopes is evaluated after control. After control the slopes correspond to the requirements of criterion of design and normal move.