Rainfall And Artificial Excavation On A Slope Stability Impact In Qingdao And Management Research

Qingdao natural slope in relation to China's southwest and northwest regions have good stability. In recent years, large-scale urban construction on the slope of the excavation damage, coupled with sudden heavy rainfall, resulting in destruction of slope when the incident occurred, greatly threaten people's lives and property, it is necessary targeted in the process of landslide Mechanism, prediction and evaluation, the stability of governance in-depth study.In this paper, to November 10, 2006 in Qingdao City of rainfall triggered-S212 Highway elderly tourist park as an example of the landslide, the landslide area system engineering geological conditions, landslides mechanism, the excavation of the artificial rainfall and landslides in contributions in the The landslide on the basis of the training programme design. In the landslide site investigation in this paper drilling, exploration pit observation, use of high-density method, ground penetrating radar to determine the border of the landslide in the rain, the excavation of the slope stability analysis of the use of finite element software PLAXIS in Landslide Treatment ANSYS design software used in the quantitative analysis, using GPS global positioning system slope deformation monitoring, inspection and slope management effectiveness. This paper studies the following conclusions:1. S212 Highway landslide slope angle is the excavation and rain caused by a combination. As slope south slope excavation formed a 20 to 25 meters high and steep dumping of the invading face, and destroyed the original slope stability; rainfall on the road when the pool of rain water exports by road into the slope, the slope in Fissures along the downward flow, contain more brecciated clay fracture filling the shear strength of a sharp decrease, a slippery surface, causing the landslide, the occurrence of disasters.2. Slope excavation slope leading to stress field in re-distribution. Most rock slope significantly reduce the stress release of the phenomenon, particularly in the vicinity of excavation, Slope excavation before the X, Y direction of maximum stress 93 KPa, 254KPa down to the slope excavation after the 85 KPa, 237KPa.shear stress increased three times, the biggest shear stress in the foot slope.3. Rainfall infiltration slippery slope leading to increased motivation, deformation increase. With the rainfall intensity, rainfall on the increase, the level of slope and vertical displacement is also continuing to increase, the maximum level of displacement in the slope near the foot of the slope, and with the increase in rainfall intensity time , The displacement of the increase, the maximum displacement of the region have been increasing slope of the vertical direction and level of stress, shear stress are also constantly increase, the maximum shear stress in the foot of the slope, the general trend from within The number, the more recent higher slope angle to the slope in the back to the original state of stress.4. Slope deformation of the follow-up monitoring data to verify the paper sliding mechanism and develop awareness of the landslide training programme is correct reasonable.In this paper, the research results of Qingdao in eastern China and the hilly area of urban construction in landslide disaster prevention has a reference guide.