摘要
边坡稳定分析结果的可靠性很大程度上取决于抗剪强度指标的正确选择,这一点对山区高填方边坡的稳定分析尤为重要。广泛应用于山区高边坡的块碎石填料,其强度具有明显的非线性,只有采用非线性指标进行分析才能较好反映边坡真实的安全状态。通过对数形式的非线性强度准则在极限平衡条分法中的应用,讨论线性强度与非线性强度指标对应的计算结果差异,指出采用线性强度指标计算高边坡稳定时,强度指标的选取应当考虑边坡的应力水平,且不应采用无黏聚力的线性强度。
Accurate choosing value on shear strength parameters have significant influence on slope stability analysis,which is especially true for the analysis of high fills constructed in mountainous region.The Mohr-Coulomb failure envelope for rockfill which is widely used in high fills is obviously nonlinear.Only using nonlinear shear strength criterion,can the real safe state of slope be well reflected.Analysis method based on logarithmic relationship advanced by Duncan in limit equilibrium method was studied.The differences in slope stability analysis by the linear and nonlinear criteria were discussed.The results of a series of calculation examples show that the confining pressure should be taken into account when the linear shear strength parameters are chosen,and the linear criterion without cohesion c is not appropriate for high fills of rockfill.
出处
《工业建筑》
CSCD
北大核心
2010年第12期65-69,共5页
Industrial Construction
基金
国家863计划资助项目(2007AA11Z113)
国家自然科学基金项目(50978140)
关键词
块碎石
山区高填方边坡
边坡稳定
非线性强度
线性强度
rockfill
slope of high fills in mountainous area
slope stability
nonlinear shear strength
linear strength
