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三、机修梯田土方调运规划 机械修梯田中,解决好挖、填土方平衡,并在此基础上做好土方合理调运规划,可避免因盲目施工而造成大量窝工浪费。 (一)土方平衡 土方平衡,就是在每块梯田施工之前,规划并在现场定出一条施工开挖线,使挖土方量与填土方量相等(或机引犁向上翻土与向下翻土时间相等)。开挖线的测算随地形条件、施工机具、施工方法不同而异。 1.机引犁修梯田,一般在坡度平缓的规整坡面上进行,地畛沿等高线布设,田面基本等宽。开挖线的测算依施工方法的不同而分两种情况: (1)机引犁上下结合翻土法修梯田,土方运
Third, the mechanical installation of terraced earthwork planning and transportation Mechanical repair terraced fields, solve digging, fill the balance of earthwork, and on this basis to do a reasonable earthwork transport planning, to avoid due to blind construction caused a lot of waste labor. (1) Earthwork Balance Earthwork balance is to plan and set up a construction excavation line on site before each terraced construction so as to make the amount of excavation equal to the amount of earthfill (or machine plowing upside down and downwards Earth time equal). Excavation line calculation with the terrain conditions, construction equipment, construction methods vary. 1. Machine plows to cultivate terraces, usually in the smooth slope of the regular slope surface, ground 布 along the contour laying, the basic width of the field. Excavation line calculation according to the different construction methods are divided into two situations: (1) machine plow up and down with soil repair lawn, earthwork