姚家坪水利枢纽工程两岸边坡稳定性研究内容包括边坡卸荷带划分和卸荷岩体质量评价2部分。通过采用小排列折射波法,有效消除了试验平洞开挖后形成的岩体松动区对边坡卸荷带划分的影响,获得了边坡内部与风化卸荷有直接关联的未扰动层原岩波速;根据平洞地质素描和波速测试资料分析高边坡岩体卸荷带的风化卸荷特征;按照国家工程岩体分级标准,根据平洞波速和室内岩石力学试验求取卸荷区岩体的BQ值及其分布规律,最终达到了充分了解和掌握该工程边坡岩体稳定条件的目的。
Abstract
The study on rock mass weathering and unloading characteristics in the high and steep slope of Yaojiaping hydraulic engineering mainly include two parts partition of unloading zones in the slope and evaluation of unloading rock mass quality. By employing small arrangement of refraction wave method, we effectively eliminated the effect of excavation disturbed zone (after test adit excavation) on the partition of unloading zones. We also obtained the original rock wave velocity which is directly related to the weathering and unloading. According to national standard of rock mass classification, we carried out wave velocity test and indoor rock mechanical test, and obtained the BQ value of unloading rock mass and its distribution rule.
关键词
姚家坪水电站 /
岩质边坡 /
水利工程 /
卸荷带
Key words
Yaojiaping hydro power station /
rock slope /
hydropower engineering /
unloading zone
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参考文献
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基金
国家重点基础研究发展计划(973)项目(2011CB710603);国家自然科学基金项目(41202223)
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