Three-dimensional Nonlinear Finite Element Analysis Of Soil Around Houzhuang Culverts

China is rich in water resources, ranked the sixth in the world.But the per average water accounts for only 25% of the world’s per average water resources. With the increase of China’s population, economic development and the effects of global warming, water shortage situation in our country is worse.In order to alleviate the urban water shortage, long distance water conveyance and water diversion are the important methods for water shortage city to obtain various water supply.Culvert engineering is a widely used structure in hydraulic engineering and highway engineering application now. Up to now, we paid much attention on the dynamic character of the culvert itself, but the force and deformation between the hole body and surrounding soils is lack of adequate study. Due to the the deep construction of culverts, the analysis of culvert and the effect of soil becomes more and more important.Hou Zhuang distributary culvert has the characteristics of high depth, and the surrounding soil pressure is larger. In this dissertation, the effect between culvert and surrounding soils are analyzed, and a three-dimensional finite element analysis between culvert and surrounding soil are done.This dissertation selects Hou Zhuang distributary culvert as the research object, according to the mechanics theory, a famous software ANSYS is adopted to establish the three-dimensional finite element model. The construction period, the period of operation and maintenance period are selected as three working conditions to be analyzed respectively, and the corresponding results are obtained.The stress deformation and stress-strain relationship of the reinforced concrete box culvert and back-filled soil, underground soil is also studied. The deformation and settlement of soil under different conditions are annalyzed, while providing maximum stress position of the culvert and maximum settlement of the soil so as to provide effective reference for future engineering application. Meanwhile, the stress between culvert body and the soil body is determined, and deformation of the soil under different working conditions is researched. The analysis of the culvert with the maximum stress was also done, which provids effective reference to actual engineering and similar application in the future.The results show:1、At the construction period, soil pressure is the main force on culvert, and the stress and displacement in Y direction is the maximum.2、At operation period, soil pressure and water pressure are the main forces on culvert. Compared with the construction period, tensile stress is slightly larger, and compressive stress is less due to the uplift pressure.3、At the maintenance period,there is no water or partial water in culvert, the maximum stress occurs, tensile stress areas close to each other near apex angle and soil interface.This kind of condition is worst. But it still meets the requirements of related criterion.