The Study On The Excavation Deformaion And Stability Of LAN YONG Highway

Rock and soil layers of high cutting slopes has its own characteristics, similar to the bedding rock slope, but it shows special deformation features due to the soil. The soil or soil slope and rock interface is often the potential slip surface. Eventually become one of the major problems of geotechnical engineering.In recent years, with the vigorous development of China’s infrastructure construction, road engineering also appeared the momentum of rapid development, a large number of mixed rock high slope had been created in the construction of highways, but the theory and the standard of consolidation and analysis of this kind of slope is not perfect. In considering the premise of economy, how to ensure the safety of the construction period and the later is one of the key problems of all researchers.In this paper, based on the Lanzhou to Yongjing highway construction project, according to the characteristics of rock interbedded, establishing the finite element computation model, researching the possible failure modes of different strata inclination, it shows that the most common failure modes of rock and soil layers slope is planar bedding slide and suggesting the reinforcement form. Discuss the influence of the engineering geological conditions, rock and soil mechanics parameters, excavation and supporting structure on slope stability.Analysis of stability and stress of retaining structure of atypical slope in Lanzhou to Yongjing highway. Using finite element to simulate the actual excavation process of slope. Analyses the overall stability and the stability of slope excavation stage, monitoring the horizontal displacement of slope and the force of support structure, the slope has the possibility of sliding occurs in the excavation process of the slope, so ecommending excavation step support step. In the process of excavation supporting structure stress may be greater than the force of slope stability analysis, so the ultimate bearing capacity of retaining structure need to be improved.