1 000m2 soil preparation needs 1.5 machine shifts. Because it is stipulated in the explanation of the national mechanical machine-team quota that construction machinery works eight hours per machine-team, the mechanical operation time within four hours is counted as half-team, and more than four hours are counted as one team. However, there are problems, such as the construction unit working 13 hours on the first day and 13 hours on the second day. Then there are two situations: first, if one day is accumulated, the total number of shifts of the chief engineer in these two days is four (13 hours is divided into eight or five, that is, two shifts, and two days are four shifts); 2. If the two days are added together, the total number of machine shifts in these two days is 3.5 (26 days in two days are divided into 3 8 days and 1 2 days, that is, 3.5 machine shifts);