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目前公路修建部门,计算路基土石方的数量都采用平均断面乘长度(即中桩间距)的方法。这种计算方法,其优点是计算简单,省时;其缺点是数量精确度差。特别是山岭地区,小半径弯道多,相邻断面变差大,如按平均断面计算,数量偏多偏少,难于合理计算,并造成计件工资上的困难,因而影响按劳取酬原则的正确贯彻。为了较合理的计算土石方数量,兹提供两点不成熟的建议供商讨。一、在土石方数量很大的小半径弯道地段,两断面间距可采用两断面之重心间距。断面重心可从断面图上找得左右面积相等之中线即得。因两断面的重心至弯道圆心半径不相等,可以用近似的平均值来计算,如图1,
The current highway construction department, the calculation of the number of subgrade and earthwork are used by the average cross-section length (ie, the distance between the piles) approach. This method of calculation has the advantage of simplicity of calculation and time saving; the disadvantage is that the accuracy of the quantity is poor. Especially in mountainous areas, small radius corners and more adjacent sections of large variation, as calculated by the average section, the number is too small, it is difficult to reasonably calculate and cause piecework wage difficulties, thus affecting the principle of Correctly implemented. In order to calculate the amount of earth and stone more reasonably, two immature proposals are provided for discussion. First, in a large number of earth and stone corners of a small radius of the lot, two cross-section spacing can be used to cross the center of gravity of the two sections. Section center of gravity can be found on the cross-sectional area of about equal center line that is. Because the center of gravity of the two sections is not equal to the radius of the center of the curve, it can be calculated by the approximate average value, as shown in Figure 1,