大渡河大岗山水电站大坝人工骨料加工系统料场深厚覆盖层边坡支护设计  

Support Design of Deep and Thick Overburden Slope in Artificial Aggregate Quarry,Dagangshan Hydropower Project

作　　者：刘军[1] 刘芳 王逸民[1] 黄佳[1] LIU Jun LIU Fang WANG Yimin HUANG Jia(Northwest Engineering Co. , Ltd. , Xi＇an 710065,China Shaanxi Uranium Enrichment Xo. , Ltd. , Hanzhong, Shaanxi 723300, China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065 [2]陕西铀浓缩有限公司,陕西汉中723300

出　　处：《西北水电》2017年第1期22-24,29,共4页Northwest Hydropower

摘　　要：大渡河大岗山水电站工程大坝人工骨料加工系统料场开挖边坡坡体结构总体为岩土混合型边坡。其中,上部深厚覆盖层边坡最大高度达135 m(约占料场开挖边坡总高度的40%),下部边坡为完整性相对较好的花岗岩坡体。该工程边坡防护处理的难点为上部覆盖层边坡的稳定问题,设计充分考虑了覆盖层坡体的结构特性和边坡潜在失稳模式,同时借鉴类似边坡工程防护处理实践经验,其边坡防护处理首选措施是在边坡开挖区外围及坡面设置截排水措施,其次选择了以坡面浅层系统加固为主、坡体深层适量预锚加固为辅的综合加固措施。目前,该项边坡治理工程已基本完工,各项监测资料显示边坡未出现异常变位现象,表明边坡整体处于安全稳定状态。The excavated slope in the aggregate processing quarry for the dam of Dagangshan Hydropower Project on the Dadu River is the earth-rock mixed one in structure generally. The slope in the deep and thick overburden at the upper layer is 135 m high at maximum （ accounting for 40% the total height of the excavated slope in the quarry）. The slope at the lower layer is of the granite one with the considerable integrity. The difficulty in the slope support is the stability of the slope in the overburden at the upper layer. In the support design, the structural features and potential instable mode of the slope in the overburden as well as the support practice of the similar slopes are considered fully. Therefore, facilities of drainage and interception around the slope excavation area and on the slope are applied first. Then, reinforcement in the shallow-layer system of the slope surface mainly and reinforcement by pre-anchorage in the deeper-layer of the slope additionally are provided. Currently, the slope support is completed. The monitoring data show that the slope is without any abnormal displacement. This presents that the slope wholly is in safe and stable condition .

关 键 词：大岗山水电站 人工骨料场 深厚覆盖层 边坡 防护处理 

分 类 号：TV223[水利工程—水工结构工程]