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连山大桥泥石流位于四川省汶川县,受汶川地震影响,流域内崩滑产生的松散固体物增多,使泥石流易发程度增大。2013年7月,受连续强降雨的影响,该流域内爆发一系列规模不等的泥石流。通过对泥石流现场调查搜集的资料,对连山大桥泥石流的发生条件以及动力学特征进行具体分析,并对连山大桥泥石流进行了危险性评价,得出如下结论:连山大桥泥石流为暴雨沟谷型泥石流,正处于发展期,表现为极易发、高度危险,在强降雨或余震的影响下暴发泥石流的可能性较大。
The debris flow in Lianshan Bridge is located in Wenchuan County, Sichuan Province. Affected by the Wenchuan earthquake, the loose solid produced by the landslide in the basin increased and the debris flow easily increased. In July 2013, due to the continuous heavy rainfall, a series of debris flows of different sizes broke out in the basin. Based on the data collected from the investigation of the debris flow field, the occurrence and dynamic characteristics of the debris flow in the Lianshan Bridge were analyzed. The risk assessment of the debris flow in the Lianshan Bridge was carried out. The conclusions are as follows: The debris flow of the Lianshan Bridge is the storm gully Debris flow, is in the development stage, showed extremely vulnerable, highly dangerous, under the influence of heavy rainfall or aftershock debris outbreak is more likely.