摘要
基于Geo-slope极限平衡软件,以典型公路路堑边坡为例,基于控制变量法的原理,重点讨论了岩体材料强度参数对边坡稳定性的影响。针对实际工程问题,由现场试验确定岩体Hoek-Brown强度参数的取值范围。为了进一步确定Hoek-brown参数等因素影响边坡稳定性的显著性,采用正交试验方法获得多因素条件下的边坡安全系数,并由F检验确定了岩体破碎程度等因素对边坡稳定性的影响大小。计算结果表明,岩体的破碎程度对边坡稳定性的影响最为显著。最后,采用FLAC3D模拟对比了边坡锚杆支护前后的稳定状态,为边坡工程治理提供了有力的指导。
Based on Geo-Slope software,taking a typical slope as an example,the effects of strength parameters of rock mass on slope stability is discussed by means of controlvariatemethod.For practical engineering problem,the values range of Hoek-Brown strength parameters are determined according to field test results.To determine the significance of factors such as Hoek-Brown strength parameters affecting the slope stability,the orthogonal test method is adopted to obtain the safety factor of slope under multi-factor conditions,then,the degree of effect of factors on slope stability are identified in light of F-test.The results show that the fracture degree of rock mass has the most significant effect on slope stability.Finally,FLAC3D is employed to compare the steady state before and after the support of slope bolt,which provides powerful guidance for resemble projects.
作者
杨欢
YANG Huan(Hunan prospecting designing&research general institute for agriculture forestry&industry,Changsha,Hunan 410007,China)
出处
《公路工程》
北大核心
2018年第5期289-293,共5页
Highway Engineering
