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A platform for research: civil engineering, architecture and urbanism
Method for measuring and calculating design height of debris flow silt arrester
The invention discloses a method for measuring and calculating the design height of a debris flow silt arrester. The measuring and calculating method comprises the following steps: firstly, respectively determining the width of a debris flow channel, the maximum allowable height of a sand blocking dam, the controlled back-silting horizontal length behind the sand blocking dam, the original ditch-bed specific descent and the silt rushing-out amount; the method comprises the following steps: firstly, setting a sediment storage dam, then preliminarily drawing up the height of the sediment storagedam, substituting obtained parameters into a calculation formula of the back-silting ratio drop and the back-silting horizontal length behind the sediment storage dam, then comparing the calculated back-silting horizontal length with the controlled back-silting horizontal length to determine whether to perform the next round of calculation or not, and finally determining the design height of thesediment storage dam. The method is based on the silt retaining dam back-silting ratio reduction considering the silt rushing-out amount. According to the method, the influence between the sediment rushing-out amount, the original gully bed specific drop, the gully width, the sediment storage dam back-silting specific drop, the sediment storage dam back-silting horizontal length and the sediment storage dam design height is comprehensively considered. Meanwhile, specific calculation parameters can be obtained through a feasible method, a basis is provided for debris flow sediment storage dam design, and the method adapts to actual engineering design requirements.
本发明公开了一种泥石流拦砂坝设计高度的测算方法。所述测算方法首先分别确定泥石流沟道宽度、拦砂坝最大允许高度、拦砂坝后控制性回淤水平长度、原始沟床比降和泥沙冲出量，然后初步拟定拦砂坝高度，所得参数代入回淤比降和拦砂坝后回淤水平长度计算公式，接着将计算到的回淤水平长度与控制性回淤水平长度进行比较，确定是否进行下一轮计算，进而最终确定拦砂坝设计高度。该方法以考虑泥沙冲出量的拦砂坝回淤比降为基础，综合考虑泥沙冲出量、原始沟床比降、沟道宽度、拦砂坝后回淤比降、拦砂坝后回淤水平长度与拦砂坝设计高度之间的影响，同时能够通过切实可行的方法获得具体的计算参数，为泥石流拦砂坝设计提供依据，适应实际工程设计需要。
Method for measuring and calculating design height of debris flow silt arrester
The invention discloses a method for measuring and calculating the design height of a debris flow silt arrester. The measuring and calculating method comprises the following steps: firstly, respectively determining the width of a debris flow channel, the maximum allowable height of a sand blocking dam, the controlled back-silting horizontal length behind the sand blocking dam, the original ditch-bed specific descent and the silt rushing-out amount; the method comprises the following steps: firstly, setting a sediment storage dam, then preliminarily drawing up the height of the sediment storagedam, substituting obtained parameters into a calculation formula of the back-silting ratio drop and the back-silting horizontal length behind the sediment storage dam, then comparing the calculated back-silting horizontal length with the controlled back-silting horizontal length to determine whether to perform the next round of calculation or not, and finally determining the design height of thesediment storage dam. The method is based on the silt retaining dam back-silting ratio reduction considering the silt rushing-out amount. According to the method, the influence between the sediment rushing-out amount, the original gully bed specific drop, the gully width, the sediment storage dam back-silting specific drop, the sediment storage dam back-silting horizontal length and the sediment storage dam design height is comprehensively considered. Meanwhile, specific calculation parameters can be obtained through a feasible method, a basis is provided for debris flow sediment storage dam design, and the method adapts to actual engineering design requirements.
本发明公开了一种泥石流拦砂坝设计高度的测算方法。所述测算方法首先分别确定泥石流沟道宽度、拦砂坝最大允许高度、拦砂坝后控制性回淤水平长度、原始沟床比降和泥沙冲出量，然后初步拟定拦砂坝高度，所得参数代入回淤比降和拦砂坝后回淤水平长度计算公式，接着将计算到的回淤水平长度与控制性回淤水平长度进行比较，确定是否进行下一轮计算，进而最终确定拦砂坝设计高度。该方法以考虑泥沙冲出量的拦砂坝回淤比降为基础，综合考虑泥沙冲出量、原始沟床比降、沟道宽度、拦砂坝后回淤比降、拦砂坝后回淤水平长度与拦砂坝设计高度之间的影响，同时能够通过切实可行的方法获得具体的计算参数，为泥石流拦砂坝设计提供依据，适应实际工程设计需要。
Method for measuring and calculating design height of debris flow silt arrester
一种泥石流拦砂坝设计高度的测算方法
CHEN JIANGANG (author) / LI SHUAI (author) / CHEN XIAOQING (author) / ZHAO WANYU (author) / CHEN HUAYONG (author) / WANG XI'AN (author)
2020-09-08
Patent
Electronic Resource
Chinese
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