基于GSI系统的边坡卸荷岩体强度参数确定  

Determination of Mechanical Parameters of Unloading Rock Mass Based on GSI

作　　者：韩新捷 张发明[1] 董梦龙[1] 曹陈霞 

机构地区：[1]河海大学地球科学与工程学院,南京210098 [2]马钢集团设计研究院有限责任公司,马鞍山243000

出　　处：《科学技术与工程》2014年第30期237-240,共4页Science Technology and Engineering

摘　　要：地质强度指标(geology stresgth index,GSI)系统和Hoek-Brown破坏准则能反映岩体所处的地质环境,估算出节理化岩体的强度参数。然而,对于具有卸荷特征的岩质边坡,以往GSI的取值缺少对卸荷裂隙与坡面间空间关系的考虑。借鉴边坡岩体质量评价系数(CSMR)系统中对边坡破坏方式和结构面产状的修正方法,以西南某水电站坝肩边坡为例,提出基于GSI系统的边坡卸荷岩体强度参数。Quantitative GSI system and Hoek-Brown strength failure criterion can reflect the geological environment of rock mass,so they are often used to estimate mechanical parameters of rock masses.Previous determination of GSI is lack of considerations for spatial relationships between unloading cracks and slope.Correction method to the slope failure mode and structural plane in CSMR system is adopted to determine mechanical parameters of unloading rock mass in the dam abutment slope of hydroelectric power statlan in Southwest China.

关 键 词：地质强度指标 卸荷岩体 强度参数 结构面产状 修正 

分 类 号：TU452[建筑科学—岩土工程]