高陡环境边坡综合治理施工技术

在水电工程建设过程中, 边坡失稳的发生将影响工程施工的安全和进度, 为了确保高陡边坡的长期安全与稳定, 有必要采取合理的支护措施对其综合治理。针对长河坝水电站高陡环境边坡地质条件复杂、治理区域较分散、岩体较为破碎且节理裂隙发育的工程特点, 采取了独特的材料运输和施工通道进行治理施工, 并根据不同治理深度对其采用相应的支护技术。针对坡面覆盖层及危岩体, 采用坡面清渣、主被动防护网、挡墙及锚筋束等施工技术进行治理, 针对边坡浅表层稳定性问题, 采用锚喷混凝土、框格梁、锚杆等支护技术进行治理, 针对边坡破碎岩体深层稳定问题, 采用预固结灌浆及锚索相结合的手段进行治理。现场长期监测数据表明:治理后的高陡环境边坡是稳定安全的。

COMPREHENSIVE TREATMENT TECHNOLOGIES FOR THE HIGH STEEP ENVIRONMENTAL SLOPE

During the construction of hydropower project, slope instability will affect the construction safety and progress. In order to ensure the long-term security and stability of high steep slope, it is necessary to take reasonable construction measures for its comprehensive treatment. For the engineering characteristics of the Changheba hydropower's high steep environmental slope: the complex geological conditions, the decentralized management areas and the more fractured and jointed rock mass fissure development, the slope problems of the different depth can take the corresponding control measures by using of unique material transport and construction channel. Aiming at the slope covering and dangerous rock mass, the supporting technologies are often clearing the slope slag, active and passive protective net, retaining wall and anchor tendon bundle and so on; Aiming at the slope shallow support aiming at the slope surface stability problem, the used supporting means are anchor spray concrete, frame Beams, anchor and others; Aiming at the broken rock mass of the slope deep layer, consolidation grouting and anchor cable technique can be used to deep supporting. The long-term field monitoring data shows that the high steep environment slope is stable and safe after comprehensive treatment.