川西地区水电站环境边坡危险源发育特征及分布规律

发布时间：2018-04-17 18:12

本文选题：环境边坡 + 危险源　；参考：《工程地质学报》2017年02期

【摘要】：工程边坡"开口线"以上的自然边坡在风化、卸荷、地震动等的影响下,其表层任一局部失稳均会对其下工程和人员安全造成严重威胁。通过对川西6座重要水电站的环境边坡危险源的调查资料进行整理,研究不同种类危险源的发育特征及分布规律,结果表明:环境边坡岩体在顺倾、陡倾裂隙发育以及裂隙式和夹层式风化作用强烈等因素的控制下,形成危石、危石群和危岩体等危险源;危险源的体积集中在小型和中型规模范围内;危险源主要分布在环境边坡相对高程0~500m范围内,其中,危岩体的发育具有垂直分带性且集中分布在0~200m范围内;危险源所在环境边坡的坡度均大于25°,当坡度在35°~40°范围内时,危险源数量最多;对于相对高程0~500m、坡度35°~75°的环境边坡应进行重点勘察,根据危险源的种类和发育分布采取相应的防治措施。
[Abstract]:Under the influence of weathering, unloading, ground motion and so on, any local instability of the surface layer of the natural slope above the "opening line" of the engineering slope will pose a serious threat to the safety of the engineering and personnel under the slope.Based on the investigation data of the environmental slope hazard sources of 6 important hydropower stations in western Sichuan, the developmental characteristics and distribution of different kinds of dangerous sources are studied. The results show that the environmental slope rock mass is inclined in a downtrend.Under the control of the development of steep dip fissures and the strong weathering of fissures and intercalations, dangerous sources such as dangerous rocks, rock groups and rock masses are formed, and the volume of dangerous sources is concentrated in small and medium scale.The risk sources are mainly distributed in the range of 0 ~ 500m relative elevation of the environmental slope, in which the development of dangerous rock mass is vertical zonation and concentrated in the range of 0 ~ 200m, and the slope of the environmental slope in which the hazard source is located is more than 25 掳, when the slope is in the range of 35 掳~ 40 掳,The environmental slope with relative elevation of 0 ~ 500m and slope of 35 掳~ 75 掳should be investigated, and corresponding control measures should be taken according to the types and distribution of dangerous sources.
【作者单位】：中国电建集团成都勘测设计研究院有限公司;中国科学院地质与地球物理研究所页岩气与地质工程重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(41322020,41672307,41302234) 中国博士后基金(2015M581167,2016M600129)资助
【分类号】：TV223

【相似文献】