基于“甘肃武都火烧沟”公式的泥石流横向分布计算

HORIZONTAL DISTRIBUTION CALCULATION OF HUOSHAOGOU DEBRIS FLOW IN WUDU DISTRICT OF GANSU PROVINCE

流速在泥石流防治工程设计中处于重要地位,如何有效获取准确的流速十分关键。在泥石流拦挡工程设计时往往采用平均流速,而对近年来陇南地区泥石流拦挡工程的调查,发现泥石流流速在横向断面分布上具有一定的不均匀性,导致部分拦挡坝体中部易遭受损毁。在"甘肃武都火烧沟"公式基础上,基于冲淤平衡等合理化假设,利用数学积分原理,提出泥石流横向分布计算公式,可供防治工程设计时参考借鉴。

The flow rate is very important in the design of debris flow control engineering. How to obtain accurate flow rate effectively is very important. In the design of debris flow blocking engineering, the average flow rate is often used. In recent years, the investigation of debris flow blocking engineering in South Gansu area has found that the flow rate of debris flow has a certain degree of heterogeneity in the distribution of transverse sections, resulting in the partial barrier body being easily damaged. On the basis of the "wudu fire ditch" formula in Gansu province, based on the rational assumption of balance of washing and silting, the calculation formula of the lateral distribution of debris flow is put forward by using the mathematical integral principle, which can be used for reference in the design of prevention and control engineering.