Research on the Calculation Method of Site Design Elevation Based on Natural-elevation Topographic Map

Through investigation of the calculation method of the designed elevation on site,certain limitations were found in practice by using the contour-line topographic map to calculate the designed elevation on site.Therefore,the natural-elevation topographic map was made new basis to calculate the designed elevation on site.By creating hypotheses and calculation model on the natural-elevation topographic map and using the principle of the equilibrium of earthwork volume,the calculation formulas of the designed elevation of the sites of no slope,single-direction slope and double-direction slope were deduced.The applications in practical projects prove that the method by using the natural-elevation topographic map to calculate the designed elevation on site is not only simple and easy to understand for engineering technical personnel,but also has strong maneuverability and extensive application,is innovative method by linking theory with practice and provides new theoretical basis for the calculation of the designed elevation on site.