CAJ | 학술논문

目前的强度折减法大多基于Mohr-coulomb准则,而较少基于Hoek-Brown准则.为了在Hoek-Brown准则中实施强度折减法,并使其得到的结果与Mohr-coulomb准则中强度折减法得到的结果等效,本文利用Hoek-Brown准则参数m、s、σ_(ci)与粘结力c和内摩擦角φ之间的关系,在Hoek-Brown准则中同时对m、s实施强度折减,通过理论推导得到m、s折减系数之间的关系;并进一步推导得到m、s折减系数与基于Mohr-coulomb准则强度折减系数之间的关系;最后,由FLAC~(3D)软件建立计算模型,采用所确定的折减方法计算边坡的安全系数,并将该结果与极限平衡法所得到计算结果进行比较,结果表明:本文确定的折减方法与极限平衡法所得到的安全系数的相差仅1.76%,验证了本文所确定的强度折减法的可行性.
목전적강도절감법대다기우Mohr-coulomb준칙,이교소기우Hoek-Brown준칙.위료재Hoek-Brown준칙중실시강도절감법,병사기득도적결과여Mohr-coulomb준칙중강도절감법득도적결과등효,본문이용Hoek-Brown준칙삼수m、s、σ_(ci)여점결력c화내마찰각φ지간적관계,재Hoek-Brown준칙중동시대m、s실시강도절감,통과이론추도득도m、s절감계수지간적관계;병진일보추도득도m、s절감계수여기우Mohr-coulomb준칙강도절감계수지간적관계;최후,유FLAC~(3D)연건건립계산모형,채용소학정적절감방법계산변파적안전계수,병장해결과여겁한평형법소득도계산결과진행비교,결과표명:본문학정적절감방법여겁한평형법소득도적안전계수적상차부1.76%,험증료본문소학정적강도절감법적가행성.
The present strength reduction method was mostly based on Mohr-Coulomb criterion other than.Hoek-Brown criterion.In order to use the strength reduction method in Hoek-Brown criterion and get a result equivalent to that by Mohr-Coulomb criterion,a new strength reduction method was applied to m and s simultaneously.The relationship between the reduction factors of m and s was obtained by theoretical deduction,based on the relationship among the parameters of m,s,σci and cohesion c,internal friction angle φ in Hoek-Brown criterion.The relationship between the factors of m and s in Hoek-Brown criterion and the reduction factors in Mohr-Coulomb criterion was found.In the end,a calculation model was built using FLAC3D application.The proposed reduction method was used in calculating the safety factor of slope,and the result was compared with that obtained by the limit equilibrium method.It showed the difference between them is mere 1.76%,which proved the feasibility of the reduction method proposed in the paper.