梯形衬砌渠道边坡(m)的优选方法

在梯形渠道水力最佳断面计算及梯形衬砌渠道侧墙稳定性计算的基础上,根据侧墙厚度变化和渠道占地变化所引起费用变化的经济分析,提出了梯形衬砌渠道主要由满足侧墙强度要求的最小板厚决定边坡（ｍ）的方法,改变了过去渠道设计中仅凭经验或单纯以水力断面最优选取边坡的局限性。据此优选的边坡（ｍ）既兼顾了水力断面最优又具有侧墙的稳定性,从而使衬砌量最小。

An Optimum Seeking Method for the Side-slope (m) of Lined Trapezoidal Canal

Based on the calculation of the canal sidewall stability and the hydraulically best canal cross section,a concept is put forward that the side slope ( m ) of a lined trapezoidal canal is determined by the minimal thickness of the concrete slab according to cost analysis and the land taken up by the canal. This concept will change the limitation of determining side slope only by personal experience. The optimal results not only optimize the hydraulic section of the canal but also make the canal sidewall stable.Thus,the lining volume of trapezoidal canal can be reduced to the minimum.