弯道超高下的泥石流淤积范围划分研究

It is primary work for prevention and mitigation to divide inundation area of debris flow. The division method is a hotspot in the field of basic research. Existing method usually bases on large scale topographic map, which is limited in the area without large scale topographic map. Meanwhile, the super elevation effect is not regarded. Aiming at the shortcomings of previous methods, the application project will research the division method of debris flow inundation area under super elevation in bend. Choosing eleven debris flows as cases, which happened recently in five regions. On the base of using previous method to divide the initial inundation area without super elevation effect, by comparing the super elevation from different calculating method with the actual survey data, the appropriate method for calculating super elevation is chose. According to the super elevation from optimal method, the final inundation area is divided by adding super elevation effect to the initial inundation area .By comparing the inundation area from dividing method with the actual survey area, the method of dividing debris flow inundation area under super elevation in bend is revised and perfected. The research provided a new method for debris flow inundation area research in the region lacking large scale topographic map and with complex terrain, which can conveniently and quickly serve the disaster prevention and mitigation.

泥石流淤积范围划分是防灾减灾的首要工作之一，泥石流淤积范围划分方法研究是泥石流基础研究领域的热点。针对现有研究方法多数以大比例尺地形图为研究前提，在缺乏大比例尺地形图地区的应用受限，以及没有考虑弯道超高效应的不足，申请课题拟进行弯道超高效应下泥石流淤积范围划分方法的研究。选择5个地区近期发生的11条泥石流作为研究案例，在采用现有方法划分未考虑弯道超高效应的泥石流初始淤积范围的基础上，将不同方法计算得到的弯道超高与案例实际弯道超高进行复核分析，优选弯道超高计算方法。根据优选方法计算的弯道超高结果，修正泥石流初始淤积区，得到弯道超高效应下的泥石流淤积范围。将方法划分的淤积范围与案例实际淤积范围进行验证分析，修正和完善“弯道超高下的泥石流淤积范围划分方法”。本研究为缺乏大比例尺地形图且堆积区地形复杂的泥石流淤积范围划分提供了一种新方法，其能方便快捷地服务于防灾减灾。