机修梯田优化设计方法研究

On Optimized Design for Mechanized Terracing

通过在甘肃省庆阳市西峰区吴庄塬坡地机修试验点和正宁县宋畔沟壑坡面机修试验点的定位试验和验证分析,探索出了推土机修筑连台梯田规划优化设计方法中,满足人工筑埂坎少用工、埂坎少占地、便利机械耕种作业和梯田稳固4个目标的多变量、非线性的简化数学模型;构建了机修工程量、工作量综合计量的物理量,即“土方加权运输量———土工量”,并且得出了相应的计算模型。上述的研究成果在黄土高原世行贷款甘肃马莲河水土保持项目一期工程区———甘肃庆阳市6县(区)进行了推广应用,皆取得了良好的效果。

Through locating experiment and verification analyses conducted in pilot research sites for mechanized terracing in Wuzhuangyuan plateau slopes of Xifeng District and Songpan gully sides in Zhengning County, Xifeng City, a simplified mathematic model of multiple varieties and non-lineal is concluded for planning bulldozer terracing, that satisfies four targets： the less consumption of labor force, less quantity of terrace edge, more convenient for mechanized farming, and stable terrace. An earth-labor value with relevant models is established for calculation, namely, work quantity and weighted average-quantity of earth transportation. The output has been extended throughout the 6 counties/city of the project area of Gansu Component of China Loess Plateau Watershed Rehabilitation Project I, and achieved good effects.