CJX水库大坝防洪安全评价毕业论文.docVIP

内 容 摘 要 本次毕业设计主要是进行CJX的防洪安全评价，首先确定CJX的防洪标准，再由点暴雨推求净雨过程，用Excel快速算法求出S(k)值确定瞬时单位线，并用求出的瞬时单位线推出时段单位线，然后计算洪水过程，最后用半图解法进行洪水调节计算，确定坝顶高程并与已知的坝顶高程进行比较，得出安全评价和建议。 关键字:防洪标准 瞬时单位线 时段单位线 洪水调节 坝顶高程 Abstract This graduation design is mainly for flood control safety evaluation of CJX, CJX is first determined by the flood control standard, rainstorm of net rainfall process, using Excel fast algorithm for S (k) value to determine the instantaneous unit hydrograph, and calculate the instantaneous unit hydrograph launch unit hydrograph, then calculate the flood process, finally flood regulating calculation by a graphic method to determine the crest elevation, and compared with the crest elevation of the known, and suggested that the safety evaluation. Keywords: flood control standard Instantaneous unit hydrograph Unit hydrograph Flood regulation Crest elevation I 目 录 前言 ...................................................... 1 1 工程背景 .................................................. 2 1.1 工程基本资料 .......................................... 2 1.2 工程分等分级及洪水标准 ................ ............... 3 2 瞬时单位线方法推求洪水 .................................. 4 2.1暴雨参数 .............................................. 4 2.2 瞬时单位线推求时段单位线 ............................... 9 2.3洪水过程 ................................................ 16 3 洪水调节计算(半图解法) ................................... 21 3.1 库容关系曲线 ............................................ 21 3.2 计算并绘制单辅助线 ...................................... 21 3.3 调洪计算求q~t过程和库水位过程 .......................... 25 3.4 绘制Q,t与q,t过程，并求qm与z设 ....................... 28 4 坝顶高程复核和心墙顶高程复核 .............................. 30 4.1 计算坝顶超高 ............................................ 30 4.2 风浪要素计算 ............................................ 30 4.3 风壅水面高度е的确定 ................................... 32 4.4 波浪爬高的计算 ...................................... 32 4.5 坝顶高程的确定 .......................................... 34 4.6 心墙顶高程的确定 ................................... 35 5 安全评价及建