【摘要】 岩体结构面的发育规律及其性状对水电工程的坝基岩体稳定性具有重要意义,西南某水电工程因开挖出现了岩体卸荷松弛现象,导致建基面浅部岩体卸荷松弛,有的地区甚至出现了岩爆现象,对工程结构面造成了明显影响,而结构面决定着坝基岩体抗滑稳定性。作者针对工程出现的情况,分别对此工程的结构面发育情况进行了统计分析,总结出工程中岩体结构面的特征及其发育规律等相关情况。分别采用了极射赤平投影法、H—H迹长估计模型、基于全迹长调查的结构面连通率估计方法结合现场资料对结构面发育规律进行统计计算分析。更多还原

【Abstract】 The development characteristics of rock structural planes play a key role in rock mass stability at foundations of hydropower stations.During hydropower station construction in southwest China,rock load-relief loosens at shallow construction level due to excavation,even rockburst happens locally,leading to a big impact over the structural planes and hence an influence on rock mass stability.This paper,based on the statistic analysis on structural planes by means of stereographic projection,H-H trace length model,connectivity rate estimation on basis of full trace length,summarizes the development characteristics of structural planes.更多还原