“5.12”地震后阿坝州茂县上门沟泥石流特征及防治措施

The characteristics and cure countermeasures of debris flow in Shangmen gully in Mao County Aba after “5.12” Wenchuan Earthquake

汶川大地震引发了大量的崩滑地质灾害,为泥石流提供了丰富的物质来源,高强度降水将引发大规模的泥石流灾害。上门沟泥石流为一条老的泥石流沟,震后其爆发频率显著增加,仅震后3个月内,就发生了2次泥石流,造成房屋、田地被毁。通过对上门沟泥石流的调查,详细分析了其形成条件、基本特征,并对其发展趋势做出了预测。提出了"3道拦砂坝+原有谷坊坝+公路涵洞清淤+防护堤"的综合治理方案,达到了预期治理目的。

A great deal of collapse and landslide geological disasters are caused by ＂Wenchuan Earthquake＂, which provide rich potential substance sources for debris flow. The high-intensity rainfall can directly cause a large sale of debris flow disasters. The debris flow in Shangmen gully as a old debris flow gully significantly increased the frequency of its outbreak after the earthquake. There occurred two debris flows only in three months after earthquake, which caused houses and field damage. The formation conditions and basic features of this debris flow are analyzed in this paper, and the development trend is forecasted through the investigation of debris flow in Shangmen gully. A comprehensive prevention and cure plan are purposed including three sand-sediment dams, existing laigh debris dams, the arrangement for highway culvert dredging,and protection embankment so as to achieve the expected aim of controlling as scheduled.