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Finite Element Analysis of Various Interaction between Backfill and Box Inverted Siphon

Author: LiuXiaoLin
Tutor: ZhangHongQing
School: Hebei University of Engineering
Course: Hydraulic Structure Engineering
Keywords: Inverted siphon Backfill Finite element method ANSYS Interaction
CLC: TV672.5
Type: Master's thesis
Year: 2012
Downloads: 26
Quote: 0
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Abstract


The Project of Middle Route of South to North Transfer(PMRSN) is a large-scale diverging project of crossing drainage areas. It is designed for the water shortage of north China. Due to the complex terrain along the way, a main channel with many rivers cross, therefore the behaviors of inverted siphon in the South to North water transfer project in occupied an important position. After the completion of the project, the behaviors of inverted siphon structure and soil influence each other, these interactions can never be ignored, especially in this important project of the people’s livelihood project. There is great difference of the materials between the structure and the earth, if we construct a very large project in the original earth and then backfill the new earth, we may not take original earth into account, but the interaction of the structure and the earthfills will be worth researching.When we do some works about underground structures, we only regard earth as one kind of pressure and don’t think much about the stress characteristics of earth and the deformation rule of earthfills. In order to deal with these problems, this paper does some researches and enriches research works in our country.The soil constitutive model has a lot of planting, this paper selected a common constitutive model for the modeling of ANSYS by comparing. The model correctly reflect the actual project at the same time, but also pursuit of as much as possible to simplify the model, the model size in this paper is selected on the basis of the reference beam on elastic foundation method.ANSYS is a wide used tool software of finite element. With its simple graphical interface and powerful General Postprocessor function, it saves a lot of time for designers. This paper discusses how to use the software modeling, extract the displacement field and stress field of different backfill, and the results are satisfactory.According to the compare of the stress field and displacement field in different earthfills, the process of settling deformation and the stress characteristics of structure can been seen. Thus, if the designing department does economical and technical compare and chooses scheme, it can give the visualable and quantitative designing information.

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CLC: > Industrial Technology > Hydraulic Engineering > Water control,hydraulic structures > Water, water diversion project > Conveyance structures > Inverted siphon
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