挖填工作是一件相当复杂的工作。必须根据摸洞组已辨别出的深度、大小、长短、方向和土质情况来确定开坑面积。就深度来说,一般可分为两类:四公尺以上者为浅洞,以下者为深洞。深洞应比浅洞开挖得大一些,浅洞适于底长二.五公尺,宽一.五公尺;深洞适于底长三公尺,宽二公尺,如此才能在底上往上翻土。坡度的大小,可根据当 Digging and filling work is a rather complex job. The pit area must be determined based on the depth, size, length, direction, and soil conditions that have been identified by the tufting group. In terms of depth, the general can be divided into two categories: more than four meters shallow hole, the following is a deep hole. Shallow holes should be larger than the shallow excavation, shallow hole suitable for the end of two. Five meters wide and five meters; deep hole for the end of three meters long, two meters wide, so in the end to Turned soil. Slope of the size, according to when