某建筑物场地地形图和方格网(边长a=20.0m)布置如图所示。土壤为二类土,场地地面泄水坡度i x =0.3%,i y =0.2%。试确定场地设计标高(不考虑土的可松性影响,加宽边坡),计算各方格挖、填土方工程量。
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