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梯田修筑中采用“土运量”(有的叫需功量、土方运输量,土方总运量、耗能参数)这个物理量比之单用土方量来衡堂土方工程用工多少在实践中,特别是梯田机修中具有重要意义。梯田土运量为土方量与这些土方的平均运距的乘积,以方·米或方·公里表示。在土容重、运土方式相同的情况下,土运量的大小决定着运土用工的多少。 假定在均匀的坡面上修梯田,里挖外填,正向送土,其横断面如图1。挖、填方区以开挖点N为原点对称。若不考虑挖方土体的松散系数,挖填土方相等,平均运距相等。图中,原地面坡角(α),原坡长——田面斜宽(B_L),田面净宽(B_G),田坎占地宽(B_K),田面毛宽(B),田块高(H),田坎外侧坡角(β)。
Terraced fields used in the construction of “soil volume” (some called the amount of power, earthwork, earthwork, energy consumption parameters) than the amount of earth with the amount of earthwork alone to Hengtang earthworks how much in practice, in particular Terraced machine repair is of great significance. The amount of soil in terraced fields is the product of earthwork and the average distance traveled by these earthworks, expressed in square meters or square kilometers. In the case of heavy soil mass, the same way of soil transport, the amount of soil transport determines the number of land transport workers. Assuming a uniform slope on the terrace, dig digging, the positive soil, the cross-section shown in Figure 1. Digging, filling area to digging point N as the origin symmetry. If we do not consider the loose coefficient of excavation soil, excavation and earthwork are equal, the average distance is equal. In the figure, the original surface slope angle (α), the original slope length - B_L, B_G, B_K, B, K ), Ridge lateral angle (β).