考虑地下水作用的Goodman-Bray方法改进及应用  

Improved Goodman-Bray Method in Consideration of Groundwater Effect

作　　者：高连通[1] 晏鄂川[1] 谢良甫[1] 

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《长江科学院院报》2015年第2期78-83,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家重点基础研究发展计划(973)项目(2011CB710605)

摘　　要：反倾岩质边坡的稳定性分析方法一般为Goodman-Bray法,但其没有考虑地下水。对Goodman-Bray法进行改进,推导出了考虑地下水作用的反倾岩质边坡稳定性计算方法,并用MATLAB编写了计算程序。最后以重庆巫溪县中梁水库硝洞槽—郑家大沟反倾岩质边坡为例,采用Sarma法和传递系数法(TCM)对改进的Goodman-Bray法(简称WGB法)进行验证。结果表明:反倾岩质边坡往往受自身岩体结构的控制,条块划分结合结构面产状的Sarma法和WGB法比铅直方向条分的TCM法更符合实际情况,但Sarma法忽视了对条块底面连通性的考虑,使计算结果偏低。综合比较3种计算方法,WGB法更加适用于考虑地下水作用的库岸反倾岩质边坡稳定性分析。Goodman-Bray Method is commonly used in the stability analysis for toppling rock slope, but the effect of groundwater is not considered. In view of this, we made an improvement to the Goodman-Bray method by deducing the stability calculation of toppling rock slope in consideration of groundwater effect, and wrote calculation program by using MATLAB. With a toppling rock slope in Wuxi, Chongqing City as a case study, we verified this improved Goodman-Bray method using Sarma Method and Transferring Coefficient Method （TCM） for comparison. Results suggest that the improved Goodman-Bray method and Sarma Method which combines rock block and structural planes could better reflect the practical situation than TCM because of the limits of toppling rock mass. But the con- nectivity of block bottom is neglected by using Sarma Method so that the calculation result is smaller than practice. So this improved Goodman-Bray method is more suitable to be used for stability analysis of toppling rock slope in consideration of groundwater effect.

关 键 词：Goodman-Bray法 反倾岩质边坡 WGB法 传递系数法 SARMA法 稳定性分析 

分 类 号：TU457[建筑科学—岩土工程]