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土方量是水利工程在进行投资预算、论证设计方案及施工准备工作中的一项重要资料,它主要是通过横断面测量经计算而得.土方量偏差的大小,与测量工作、断面图绘制和计算方法等的精度有关.下面就平原地区土方计算对横断面测量和绘制横断面图的精度要求提出几点看法.(一)横断面测量1、横断面和丈量精度对土方量的影响当相邻两横断面面积之较差不超过40%时,土方量的计算式为:
Earthwork volume is an important data for water conservancy project in carrying out investment budget, demonstrating design scheme and construction preparation work, and it is mainly calculated through cross-section measurement. The size of earthwork deviation is similar to the measurement work, section drawing and Calculation methods, etc .. The following plain earthwork calculation of cross-sectional measurements and drawing cross-sectional view of the accuracy requirements made a few comments: (a) cross-sectional measurement 1, the cross-section and measurement accuracy of the amount of earth When the phase Adjacent two cross-sectional area of less than 40% of the poor, the earthwork is calculated as: