考虑地下水作用的Goodman-Bray方法改进及应用

高连通; 晏鄂川; 谢良甫

doi:10.3969/j.issn.1001-5485.2015.02.017

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raybet体育在线院报 ›› 2015, Vol. 32 ›› Issue (2) : 78-83. DOI: 10.3969/j.issn.1001-5485.2015.02.017

岩土工程

考虑地下水作用的Goodman-Bray方法改进及应用

高连通,晏鄂川,谢良甫

作者信息 +

Improved Goodman-Bray Method in Consideration of Groundwater Effect

GAO Lian-tong,YAN E-chuan,XIE Liang-fu

Author information +

文章历史 +

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。

Abstract

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 connectivity 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.

导出引用

高连通,晏鄂川,谢良甫. 考虑地下水作用的Goodman-Bray方法改进及应用[J]. raybet体育在线院报. 2015, 32(2): 78-83 https://doi.org/10.3969/j.issn.1001-5485.2015.02.017

GAO Lian-tong,YAN E-chuan,XIE Liang-fu. Improved Goodman-Bray Method in Consideration of Groundwater Effect[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(2): 78-83 https://doi.org/10.3969/j.issn.1001-5485.2015.02.017

中图分类号： TU457

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