[关键词]
[摘要]
某水利枢纽下游侧存在渗水、冒水等严重问题,采用横波冲击映像法对进水闸底板与基础围岩脱空情况进行探查,结果表明该法不受水和钢筋网等因素干扰,为修补加固设计方案提供可靠基础资料。文中阐述了检测方法原理、设备及检测过程,给出了数据处理流程,通过数值模拟制定脱空标准,完成闸底板脱空缺陷分布图。检测结论:(1)水闸底板存在脱空,部分底板脱空区形成渗漏通道,造成下游侧涌水;(2)脱空率大于20%的闸底板,需要及时进行灌浆处理,中等程度脱空的闸底板,还需做进一步探查,其他的脱空不严重水闸底板无需处理;(3)建议对水闸进行垂直变形和水平变形监控,严格控制最高运行水位,防范水闸塌陷和下滑。横波冲击映像法为类似工程缺陷问题的探查提供了借鉴。
[Key word]
[Abstract]
There are serious seepage and gushing of a sluice hub. The cavity and distribution scope between Sluice floor and foundation surrounding is carried out based on shear-wave impact imaging method (SIIM),results is show that SIIM can reduce the interfere of water and steel mesh. The exploration results also provide the reliable basic data in terms of design repair and reinforcement the hydraulic project. At first,this paper describes the principle of the detection method,and gives the detection data processing,and develops cavity standards by numerical simulation. Finally, the defect distribution of sluice floor was completed. Detection conclusion as follow:1)Sluice floor presence void and some void is formed on the leakage passage which caused gushing water on the downstream side;2)void of sluice floor which greater than 20% need grouting treatment for timely, moderate void need further exploration, the other void which is less severe without treatment;3)Recommended for monitoring vertical deformation and horizontal deformation of sluice, strict control of the maximum operating level to prevent sluices from collapse and decline. SIIM provides a reference method for similar hydraulic projects in defects exploration.
[中图分类号]
[基金项目]
国家973计划课题(2013CB036406);国家自然科学基金(51209121;51578544)