CAJ | 학술논문

2009-08-06四川省汉源县顺河乡猴子岩发生大型崩塌,90余万m~3崩塌体直接冲进大渡河,形成40 m高的堰塞坝,阻断大渡河,形成库容达6 000×10~4 m~3堰塞湖,导致2人死亡,29人失踪和重大财产损失.以现场调查与观测为基础,分析灾害发育条件和成灾过程,认为高陡边坡次级断裂造成的岩体破裂是崩塌发育的基础条件,"5.12"汶川大地震、强降雨及道路工程建设造成的边坡失稳是灾害发生的重要原因.针对崩塌堵河灾害的成灾特点,提出加强山区重大工程区地质灾害评价、预防、预警,科学设计、施工减少陡坡开挖,采取果断措施处置施工过程中出现的险情、灾情,及时在灾害点设置警示标志减少灾害损失等减灾对策.
2009-08-06사천성한원현순하향후자암발생대형붕탑,90여만m~3붕탑체직접충진대도하,형성40 m고적언새패,조단대도하,형성고용체6 000×10~4 m~3언새호,도치2인사망,29인실종화중대재산손실.이현장조사여관측위기출,분석재해발육조건화성재과정,인위고두변파차급단렬조성적암체파렬시붕탑발육적기출조건,"5.12"문천대지진、강강우급도로공정건설조성적변파실은시재해발생적중요원인.침대붕탑도하재해적성재특점,제출가강산구중대공정구지질재해평개、예방、예경,과학설계、시공감소두파개알,채취과단조시처치시공과정중출현적험정、재정,급시재재해점설치경시표지감소재해손실등감재대책.
August 6th, 2009,a large-scale rock fall occurred at Houziyan in Hanyuan county. 900×10~3 m~3 rock directly rushed into Dadu river and created a dam with the height of 40m,which blocked Dadu river and engendered a dammed lake with the length over 10 km and the capacity of 60 ×10~6 m~3. This hazard resulted in 2 persons in dead, 29 person lost and quantity of property loss. This paper mainly discussed the causes and characteristics of this disaster on basis of field investigation and observation. It was found that the rock breach induced by high-steep slope sub-rupture provided the favorable condition for this rock fall, and the interaction of S306 highway reconstruction, 5.12 Wenchuan Earthquake and intensive rainfall triggered this hazard. For mitigating this kind of hazard,it was recommended that strengthened the assessment,prevention and alarm of geo-hazards at mountain engineering construction areas,reduced steep slope dug and failure by rational design and construction,treated and controlled the hazards in the process of engineering construction as well as decreased the hazard losses by disposing alarm sign at hazard site in time.