High Fill Culverts Eps Minus Haute Test

With the rapid development of highway, more and more constructions such as culverts have been built under highly filled road embankment; however, the damage and accident occurs frequently. Based on the project of 212 national highway from Lan Zhou to LinTao in GanSu province and the field test of culvert with high embankment, this paper states the main cause of culvert damage is that some design department adopt the formula or empirical curves with a smaller copulating result to calculate the vertical earth pressure on the top of the culvert. The better way to resolve the problem is to pave the soft material whose compressibility is bigger than earth fill on the top of the culvert and as a result the earth pressure is reduced greatly. Having studied the mechanical properties of EPS through laboratory test and filled it on the top of the culvert with high embankment to test load shedding on site, we acquired lots of actual achievements about the vertical earth pressure on the top of the culvert, earth pressure around the culvert, and deformation of soil and EPS under load shedding and normal circumstances and analyzed the operational factor and reducing-load effect of EPS which was used as load-reducing materials. Further more, this paper brings forward the empirical formula of copulating the vertical earth pressure on the top of culvert under reducing-load circumstances and gives correlative curves about the height of earth fill, different height of EPS on reducing -load and density of EPS .In addition, the paper has also analyzed the performance of stress and deformation of the culvert under load shedding and normal circumstances through finite element method with MARC program, all these can afford the reference to designer for the future .