Harness Engineering Study On Dingzhuang Landslide And Dangerous Rock In The Three Gorges Reservoir Area

In our country, the proportion of mountain area is nearly two to three of the whole area and it is beyond 70% in some provinces. Therefore, to prevent variety of geological hazards is substantial to the economy development. Especially in Chongqing, which is a typical mountain city, to evaluate and prevent geological hazards is becoming more urgent with the implementation of the strategy for the development of our west region and the construction of more large urban facilities. In this paper, a systematic study is carried out on the harness engineering of Dingzhuang landslide and dangerous rock in the Three Gorges Reservoir Areas, which includes the evaluation of hazard, the stability analysis and the supporting system of landslide and dangerous rock, the monitoring system and the project management design. Through these studies and analysis, following conclusions could be drawn:(1) It is necessary to study on harness engineering of landslide and dangerous rock since the main representations of this geological hazard are landslide and dangerous rock through geological investigation;(2) It can be concluded though stability analysis that the Dingzhuang landslide is stable naturally, which is identical to the in-situ investigation;(3) Through stability analysis, the landslide would slide if the water level dropped down from 175.10m to 156.0m and it rained successively after the Three Gorges Reservoir work.(4) According to the results of calculation and the characteristic of the landslide, it is suggested that such measures as unloading at upper part, anchorage and pile supporting system and drainage system should be used on the landslide.(5) According to geological investigation, there are three kinds of dangerous rock in the engineering, those are failing-down rock, collapsing rock and sliding rock. The methods of stability analysis of every dangerous rock are presented.(6) The results of stability analysis show that the dangerous rocks are all unstable and the measures to avoid danger are suggested.(7) The monitoring system of landslide and the project management design are presented at last, which lays strength foundation for the harness engineering.