CAJ | 학술논문

汶川地震重灾区，由地震触发的地质灾害数量很多，其中危岩体稳定性判定为灾害治理重点工作。基于可靠度理论，针对坠落式危岩体稳定性极限状态特征，建立其可靠度判定概率极限状态方程，并采用现场量测及概率统计方法，对功能函数中危岩破裂面倾角β、危岩等效摩擦角φ、单位长度危岩体重力ω、危岩等效黏聚力 c、危岩体高度 h 等基本变量的均值、变异性及分布形态进行确定。基于以上研究成果，建立了坠落式危岩体稳定性可靠度指标计算方法，同时对各基本变量的可靠度敏感性进行研究，研究结果表明：其敏感性由大到小依次为危岩破裂面倾角β、危岩等效黏聚力 c、危岩的高度 h、单位长度危岩体重力ω、危岩等效摩擦角φ，研究成果为坠落式危岩体稳定性判定和治理方案设计提供参考依据。
문천지진중재구，유지진촉발적지질재해수량흔다，기중위암체은정성판정위재해치리중점공작。기우가고도이론，침대추락식위암체은정성겁한상태특정，건립기가고도판정개솔겁한상태방정，병채용현장량측급개솔통계방법，대공능함수중위암파렬면경각β、위암등효마찰각φ、단위장도위암체중력ω、위암등효점취력 c、위암체고도 h 등기본변량적균치、변이성급분포형태진행학정。기우이상연구성과，건립료추락식위암체은정성가고도지표계산방법，동시대각기본변량적가고도민감성진행연구，연구결과표명：기민감성유대도소의차위위암파렬면경각β、위암등효점취력 c、위암적고도 h、단위장도위암체중력ω、위암등효마찰각φ，연구성과위추락식위암체은정성판정화치리방안설계제공삼고의거。
In the harder-hit earthquake areas such as Wenchuan,the constancy of unstable rock is considered as a key work of the disaster control because there are many kinds of geologic hazards caused by the earthquake.This paper is based on the reliability theory and uses the limit state characteristics of falling unstable rocks.It establishes the equation of constancy judging probability limit state.It also determines the mean value,variability and distribution shape of the unstable rock angle βof rupture,the unstable rock angle φof equivalent internal friction, weight per unit length,equivalent cohesion,height and other basic variables in the functions by means of field measurement and probability statistics.Based on these studies,the paper develops the calculation method of falling unstable rock stability reliability index.At the same time,it studies the parameter sensitivity of each basic variable. The result shows that the variables in descending order from high to low sensitivity are the unstable rock angle βof rupture,the equivalent cohesion,the height,the weight per unit length and the angle φof equivalent internal friction.The result offers a reference in judging the constancy of unstable rock and designing of a regulation scheme.