Research Of The Tibet Autonomous Region National Highway318Line Of The Landslide Mechanism And The Field Prevention And Control Technology

Along with our country in the western development strategy in Tibet, Tibetconstantly advancing with the Midwest will increasingly frequent exchange of goods,transport capacity will directly influenced Tibetan region economy fast healthydevelopment. In Tibet as one of the main transport channels in material transportation,sichuan-tibet highway stablizing the geological disasters in highway, however,landslides and high slope affects the normal operation of sichuan-tibet highway.For the above reasons, this paper TianTuo road318line sichuan-tibet highwaylandslide and high slope gully period of stability studies a new sliding retainingstructure, through the anti-sliding retaining structure, proposed force monitoringprestressed anchor framework and the optimization design of the prestressedanchor-chained piles calculation method. Put forward to anchor frame beams FenZhangpull stage and work to the different stages of internal force calculation methods. Thenode According to the deformation of anchor-chained piles put forward the principle ofcoordinate calculation methods, the cable tension calculation is more reasonable. Andthe study found, soft hard alternate with the layered slope body structure pour is toproduce bedding landslide geological foundation, multilayer weak layer（or sandwich）,the presence of formed as artificial excavation multilayer, multilevel traction typelandslide. Rivers slice is natural the outside dynamic bedding landslide, and artificiallyexcavation cut strata bedding engineering landslide is the outside dynamic. Should tryto avoid the location is the landslide rock pour location, less slope excavation, necessarycutting should ask after reinforcement excavation. And the tiny pile stress mechanismand design calculation methods for the application of this new structure openedchannels.First, national highway318line highway landslide main types and distribution lawresearch. Collect national highway318line along the highway landslide material,system has been summarized and analyzed the genetic type of landslide in topographicaland geological conditions, natural and human factors, and reveals the role for the futuredistribution, the highway survey and design for reference.Secondly, the rocky bedding landslide mechanism research. ZuoGongXiansegment with mudstone sichuan-tibet highway landslide rock bedding coal formation based on engineering, a thorough study on its formation, inducing factors and slidingmechanism, including potential slide belt layer, are sliding sliding belt layers andposition, the slide soil physical and mechanical properties and the motion law of thelandslide. Through the landslide surface, underground displacement and the monitoringof groundwater changes, grasp their dynamic rule, on the one hand, to ensure theconstruction safety, on the other hand can test the effect of prevention projects.Finally, new anti-sliding retaining structure research. Combined with theprevention of relying on engineering, it is used widely but design theory is not yetperfect prestressing anchor structure in-depth study, mainly by field measurementstructural stress and numerical analysis, research dispersed pressure, tension stressmodel, type anchor application conditions and the advantages and disadvantages, anchorprestress loss, the design and calculation method of anchor wire frame, anchor piledesign and calculation method of tiny pile, and discusses the force and the design forthe more economical, sliding engineering design provides theory basis.This paper obtains the research achievements in similar landslide control ofpractical feasible reference value.