摘要
大坝坝基是水电工程的重要组成单元,为了解大坝坝基沉降形变和倾斜形变特征,本研究在不同高程的廊道内布设了水准观察点,通过长期的监测数据,了解了大坝坝基的基本形变特征。沉降监测结果表明:大坝过渡层及堆石区坝基覆盖层累计最大沉降量为695.53 mm,该处蓄水后至今沉降20.00 mm;主防渗墙表现为向上游变形,当前最大变形值为-20.51 mm,并具有向右岸变形的特征,当前最大变形值为-24.01 mm;副防渗墙表现为向下游变形,当前最大变形值为8.36 mm,并具向右岸变形的特征,当前最大变形值为-29.08 mm。
Dam foundation is an important component unit of hydropower project,in order to understand the characteristics of settlement deformation and tilt deformation of dam Foundation,the level observation points are laid in different elevation corridors,and the basic deformation characteristics of dam foundation are understood through long-term monitoring data.The results of settlement monitoring show that the cumulative maximum settlement of dam transition layer and rockfill area is 695.53 mm,and the settlement is 20.00 mm after water storage.The main anti-seepage wall shows the upstream deformation,the current maximum deformation value is-20.51 mm,and has the characteristics of the right bank deformation,The current maximum deformation value is-24.01 mm;the secondary impervious wall is characterized by downstream deformation,the current maximum deformation value is 8.36 mm,and has the characteristics of the right bank deformation,the current maximum deformation value is-29.08 mm.
作者
李建刚
王天宇
陈慧霞
LI Jiangang;WANG Tianyu;CHEN Huixia(Zhejiang Provincial Surveying and Mapping Brigade,Hangzhou 310030,China;Wutong Street Office,Tongxiang City,Tongxiang 314500,China)
出处
《测绘与空间地理信息》
2019年第11期239-243,247,共6页
Geomatics & Spatial Information Technology
关键词
精密水准测量
坝基形变
形变监测
precision level measurement
dam foundation deformation
deformation monitoring
