关键词: 台段式场平, 土方量计算, 土方平衡, 优化设计, 场平单元

Abstract: In view of the complexity and particularity of stage field-leveling construction project,an earthwork balance optimization design based on field-leveling characteristic parameter was presented. The method takes the effect of (stage board) designed elevation adjustment on project cost,slope supporting investment and basic investment of structures into consideration. First,the reasonable excavation slope magnitudes were determined by analyzing the site’s topographic slope. Then according to dig-fill volume,area and unbalanced coefficient of different field-leveling units,the controlled and dependent field-leveling units were determined. In the controlled field-leveling unit,we select the critical excavation unit and filling unit. On this basis,the optimized parameters based on the critical excavation unit and the critical filling unit was obtained and then the earthwork balance optimization mathematical model was established. Finally,the optimization design method was verified to be practical and effective with a large-scale construction project of cement clinker production line as an example in consideration of the expansion effect of the excavation and filling. Results show that the optimized excavation volume was decreased by 173 000 cubic meters,the excavation volume of slope was decreased by 20 400 cubic meters,and the total dig-fill unbalance coefficient was reduced from 1.59 to 0.97,which reduced the project cost and the construction difficulty.

Key words: stepped field leveling, earthwork calculation, earthwork equilibrium, optimization design, field unit