四川都江堰椿芽树沟泥石流特征参数计算及防治工程设计

Calculation of characteristic parameters and design of control work against of debris flow in Chunyashu gully,Sichuan province

运动学和动力学特征参数的分析计算是泥石流防治工程设计的基础。本文以椿芽树沟泥石流为例,在分析泥石流形成条件的基础上,详细计算了泥石流的流体重度、流速、流量、冲出量、冲压力、冲高、爬高和超高等运动学和动力学特征参数,提出了"拦挡排"相结合的综合防治思路,并给出了"谷坊坝+梳齿坝+单边防护堤+V型排导槽"的具体防治工程。椿芽树沟泥石流的防治方案不仅为椿芽树沟泥石流的防治提供了技术支持,也可为同类工程提供参考。

Analysis and calculation of characteristic parameters of kinematics and dynamics are the basis of control engineering design of debris flow. Taking Chunyashu Gully debris flow as an example,the formation conditions of debris flow were analyzed firsty. Then kinetic and dynamic parameters,including bulk density,velocity,flow capacity, sediment flush-out, impact force, impact and lift height, climb height and superelevation had been calculated in detail. Finally,the comprehensive control concept of integrated blocking method,retaining method with draining method was present,and the control engineering including check dam,comb dam,one-side protection embankment and V-type drainage groove was designed. The above design scheme provides technical support for the control of Chunyashu Gully debris flow and design reference for similar engineerings.