四川省彭州市龙门山镇楼房沟泥石流灾害特征及防治对策
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摘要
"5.12"汶川大地震,不仅造成了大量的人员伤亡和经济财产损失,同时还诱发了为数众多的崩滑流等次生地质灾害。在实际调查基础上,系统分析了楼房沟泥石流形成条件、类型、规模、危害程度及动力学特征。楼房沟流域地质构造复杂,不良地质现象发育,特别是地震诱发多处崩塌、滑坡等地质灾害。通过野外调查发现,楼房沟沟谷分布有滑坡堆积物10处,崩塌堆积物有3处,沟道堆积物有3处,总共存在9.49×104m3松散固体物源,可参与泥石流活动的动储量为2.0×104m3,一旦遇暴雨极易产生泥石流灾害,直接威胁沟道两侧及下游区域人民生命财产安全。楼房沟流域应采取治沟与治坡兼顾的原则,其具体治理方案是以修建拦挡坝导和防护堤疏流清淤、排导为主,拦挡为辅。
The May 12th Wenchuan macroquake not only caused a mass of casualties and economic loss of property,meanwhile brought out numerous secondary geological hazards such as rock avalanche etc.Based on investigation,systematically analyzed the Loufanggou debris flow forming condition,type,scope,extent of harm and dynamic characteristics.Geological structure is complex in Loufanggou valley,undesirable geological phenomena had been well developed,and especially the earthquake induced collapses and landslides.The field investigation has found 10 heaps of landslide debris,3 heaps of collapsed debris,3 channel debris in Loufanggou valley,total 9.49×104m3 loose solid provenances,in which 2.0×104m3 dynamic reserve can participate in debris flow activity,directly threatening people safety of life and property in both valley sides and lower reaches.In the valley should give consideration to both valley and slope fathering.The specific program is to construct leading embankment and blockade dam,but should lay emphasis on the drainage and dredging,then supplemented by blockade.
The May 12th Wenchuan macroquake not only caused a mass of casualties and economic loss of property,meanwhile brought out numerous secondary geological hazards such as rock avalanche etc.Based on investigation,systematically analyzed the Loufanggou debris flow forming condition,type,scope,extent of harm and dynamic characteristics.Geological structure is complex in Loufanggou valley,undesirable geological phenomena had been well developed,and especially the earthquake induced collapses and landslides.The field investigation has found 10 heaps of landslide debris,3 heaps of collapsed debris,3 channel debris in Loufanggou valley,total 9.49×104m3 loose solid provenances,in which 2.0×104m3 dynamic reserve can participate in debris flow activity,directly threatening people safety of life and property in both valley sides and lower reaches.In the valley should give consideration to both valley and slope fathering.The specific program is to construct leading embankment and blockade dam,but should lay emphasis on the drainage and dredging,then supplemented by blockade.
引文
[1]王继康.泥石流防治工程技术[M].北京:中国铁道出版社,1996.
[2]周必凡,李德基,罗德富,等.泥石流防治指南[M].北京:科学出版社,1991.
[3]谭炳炎.泥石流沟严重程度的数量化综合评判[J].水土保持通报,1986.
[4]中华人民共和国国土资源部.DZ/T0220-2006泥石流灾害防治工程勘查规范[S].北京:中国标准出版社,2006.
[2]周必凡,李德基,罗德富,等.泥石流防治指南[M].北京:科学出版社,1991.
[3]谭炳炎.泥石流沟严重程度的数量化综合评判[J].水土保持通报,1986.
[4]中华人民共和国国土资源部.DZ/T0220-2006泥石流灾害防治工程勘查规范[S].北京:中国标准出版社,2006.
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