基于多点位移计的黄金峡水利枢纽施工期边坡实测变形特征分析  

Deformation characteristics of a slope in the Huangjinxia Water Conservancy Project during construction period based on multi-point displacement meters

作　　者：江跃 程琳[1,2] 马春辉[1,2] 杨杰[1,2] 李波[3] JIANG Yue;CHENG Lin;MA Chunhui;YANG Jie;LI Bo(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China;Faculty of Water Resources and Hydroelectric Engineering,Xi’an University of Technology,Xi’an 710048,China;Engineering Safety and Disaster Prevention Center,Changjiang River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]西安理工大学水利水电学院,陕西西安710048 [3]长江科学院工程安全与灾害防治研究所,湖北武汉430010

出　　处：《水资源与水工程学报》2023年第3期201-207,224,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51409205、52039008);陕西省自然科学基础研究计划-引汉济渭联合基金项目(2019JLM-55)。

摘　　要：黄金峡水利枢纽左岸边坡在施工期发现了多组结构面,监测资料显示边坡出现了多次变形突变现象,且变形大多发生在20~30 m范围内,多点位移计深度区间位移最大值超过80 mm。为此,结合多点位移计监测成果,从时空变化规律、特征值统计、位移速率等方面综合分析了边坡岩体的变形特征。结果表明:爆破开挖和结构面是导致边坡产生较大变形的主要因素;边坡主变形区与结构面fz39、L920和fz15的位置吻合,坡体变形主要受上述结构面控制。与其他同类工程相比,目前边坡位移量级基本处于正常范围。随着加固措施的逐步实施,边坡已基本趋于稳定,应重点关注Ⅰ区和Ⅳ区边坡坡脚部位的变形情况,并加强支护和排水措施。Multiple sets of structural planes were found on the left bank slope of the Huangjinxia Water Conservancy Project during the construction period.The monitoring data showed that the slope had multiple deformation mutations,and most of the deformation occurred in the range of 20-30 m,with the maximum interval displacement detected by the multi-point displacement meters exceeding 80 mm.Regarding to this problem,the deformation characteristics of slope rock mass are comprehensively analyzed from the aspects of spatio-temporal variation law,eigenvalue statistics and displacement rate,based on the monitoring data of the multi-point displacement meters.The results show that blasting excavation and structural planes are the main factors leading to large deformation of the slope;the main deformation zone of the slope is consistent with the position of the structural planes of fz39,L920 and fz15,so the slope deformation is mainly affected by the above structural planes.Compared with other similar projects,the current slope displacement magnitude is basically in the normal range.With the gradual implementation of reinforcement measures,the slope has basically stabilized,so attention should be paid to the deformation of slope toe in areaⅠandⅣ,and the support and drainage measures should be strengthened.

关 键 词：边坡变形 岩体结构面 施工期 多点位移计 黄金峡水利枢纽工程 

分 类 号：TV698.1[水利工程—水利水电工程]