Structural Analysis And Optimum Design Of Rainwater Collecting And Storing Facities

Draught, water shortage and soil erosion have always been one of main difficulties forthe ecosystem environment construction on loess plateau. Regulation of rainfall runoff andefficient utilization of water and soil resources are effective means to resolve these difficulties.They are also important measures for solving drinking water safety in deprived poor-qualitywater area. More important, rain water storage facilities are critical components for regulationconstruction. However, the structure type of storage facilities is often practically designed,and the basic theories are not ripe. Also, structural optimization design is of juvenility forstorage facilities and lack of software application. To settle these questions above, this paperobtains results below by lab testing and structure calculation：(1)Experimental research on elastic modulus of MBER solidified soil. Aiming at fewresearches on elastic modulus of solidified soil, based on independent development soilstabilizer, this paper studies sample soils from Yang-ling, and analyzes dosage of soilstabilizer, different moisture content, and different age, which influence MBER solidifiedsoil's elastic modulus. According to the experimental result, the stress-strain relationshipcurve is obtained, and the solidified soil's elastic modulus is between300MPa and1000MPa,which shows the rising tendency with the increasing of dosage of solidified soil, moisturecontent and age. However, the elastic modulus of solidified soil begins to go down with theachievement of threshold value of moisture content. The result shows that the solidified soilcan be improved through the implementation of mechanical property with reasonablycontrolling of solidified soil dosage and moisture content.(2)The analysis and optimized design of solidified soil water cellar. In this paper, byusing the Finite Element Method and ANSYS-based structure analysis software, solidifiedsoil water cellar's space structure are analyzed. Meantime, taking the minimum constructionmaterials consuming as objective function, allowable stress as constraints, the cellardimension is optimized according to its capacity of water. In conclusion, this paper suppliestechnical support for cellar designer and theory basis for new cellar development. Fromanalysis results, empty is the solidified soil water cellar's adverse working condition. Underthis condition, saving materials usage is objective function. When cellar strength and stiffness is satisfied, saving cellar construction materials usage is objective function, and allowablestress is constraint. Then the cellar wall thickness is optimized, the optimal wall thickness is19cm.(3) The analysis and optimized design of catchment area of solidified soils. Aiming atmany factors that affect the catchment area of solidified soils, we have select length of panel,thickness of panel, concrete module, base modulus as calculated variable, and we use ANSYSsoftware for calculating the maximum tensile stress and vertical displacement below thestabilized road panel. We also analysis the influences of solidified soils performance fromuniaxial double wheel groups standard axis load BZZ-100and temperature change. Theseprovide the valuable references for design and maintenance of solidified soils. The resultsshows that the degree of destroy of solidified soils for the catchment area varies in differentseasons such as summer and winter. In hot temperature of summer, solidified soil for thecatchment area is easy to be destroyed. Also the temperature and base modulus increased withthe increment of length of solidified soil's panel. Meanwhile, the catchment area is used asroad, the panel load tress decreases obviously. And under of influence of moving load, themaximum tensile stress and vertical displacement become smaller with the increment of speedof vehicles. We conclude the optimized thickness of solidified soils catchment area is that thesurface layer is about11cm and cushion layer33cm under the constrain condition of materialstress and object function using the price of elemental area.