Debris Flow Deposition Area On The Impact Of Road Works

China is a mountainous country,Mountainous area of more than two-thirds of the total land area.Particularly in the western mountains,complex geological structure, intense neotectonic movement, frequent seismic activity, large fluctuations topography, climate changing, fragile ecological environment, the formation and development of debris flow created the conditions to become the most serious debris flow one of the regions in the word. Our country debris flow centralism distributes in the southwest mountainous area, the Loess Highlands,the Qin Prasarn as well as blue original southeast area, debris flow severely impair national economy each aspect, suffers injury the heaviest loss by the railroad and the road department to be biggest.According to incomplete statistics, because our country road the debris flow creates every year the direct economic losses amount to several billions Yuan.The debris flow to the highway subgrade, the arch of bridge, the road surface and the corresponding protection structure has the intense destructive effect, because has constructed in the project to choose the plan to cause the project heavy loss the example to be common, the reasonable choice debris flow ditch design proposal becomes the project implementation the important safety control.According to the basin run-off ditch shape, the solid loose material distribution and the debris flow stack body distribution characteristic, may divide the debris flow into the formative region, the circulation area and the stack area.Road generally in debris flow stack area crosswise traversing, therefore, strengthens the debris flow stack area to have the important theory significance and the use value to the highway engineering influence research.This article the first harm and formed the condition to the debris flow the question to carry on the thorough discussion,the water source condition which, the earth source condition forms from the debris flow disaster, and the terrain landform condition's analysis obtains, have made the detailed elaboration to the mud-rock flow movement mechanism's formula and the function (including movement characteristic and dynamic characteristic).Above this foundation, unifies the open country on-the-spot investigation, the survey, the sample and so on dependence geographic information system method,experimental exploration debris flow stack area shape characteristic,material composition and scale and debris flow basin relations, union stack area to highway engineering destruction form, regarding stack area related road route selection, engineering structure choice including Position and types made the careful analysis.Proposed the reasonable prevention measure.Next, specially has made the thorough elaboration to our country and the highway engineering related path debris flow disaster's prevention present situation and the trend of development, and the mechanical control measure which and the biological control measure adopts on the debris flow disaster have carried on the thorough discussion one by one. Analyzed each measure applicable scope and the characteristic, the example has lifted the ration picture and the project example material comes to show, this will have certain guiding sense regarding the present similar engineering project's design and the construction.In the finality,waited for the further work and the deficiency to this article in has carried on the brief discussion...