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一九六四年十一期,发表了我们介绍的条田平整设计方法。随着生产实践的发展,发现前法有很多缺陷,需要进一步研究改进。 条田设计准则部分有两点修改:(1)两面灌水的引渠,左右相邻两格田的高差不得超过3厘米;(2)沿引渠方向相邻两格田,高差不得超过10厘米;相差10厘米的格田,不能连续超过三个以上。 条田平整设计方法上的重大缺陷也有两点:(1)按照前文所述方法调整纵坡与横坡,太死板、机械,不能充分符合自然地貌,一般挖填都深,土方过大。产生这个缺点的原因是地
In 1964 eleventh issue, published the strip flat design method we introduced. With the development of production practice, we found that the former method has many defects and needs further research and improvement. There are two revisions to the section of the bar design guidelines: (1) Drainage channels on both sides shall have a height difference of not more than 3 cm between the two adjacent grids; (2) The height difference between two adjacent grids along the channel shall not exceed 10 cm; a difference of 10 cm grid, can not be more than three consecutive. There are also two major flaws in the design method of flatness. (1) The vertical and horizontal slopes are adjusted according to the methods described above. Too rigid and mechanical can not fully conform to the natural landscape. The reason for this shortcoming is ground