像超人一样 - 透过墙壁和混凝土结构

Author:Reka Vasszi

Regular monitoring and maintenance, as well as comprehensive inspection, ensure dams remain in a safe and working condition throughout their lifetime. The early detection of deficiencies can, furthermore, prevent failures. Precautionary operations, such as daily inspections of facility conditions or repairing defective spillways, gates and valves are among the routine maintenance activities of dam operators.

考虑到大坝的围裙的高度和可及性，到达模棱两可的区域以检查大坝下游面孔可能会有挑战。要到达阀门并在法国的Barthe大坝上进行维护工作，机电公司Meije和可再生电力的生产商The Electricite de France（EDF）提出了解决方案。在大坝上部围裙上建造的绞车的帮助下，专业人士可以下降以在阀门上进行维护。

该项目非常具有挑战性。为了构建起重机，团队不得不钻20, 80-centimeter-deep holesinto reinforced concrete, where three different layers of steel bars located at three different depths – 10, 30 and 50 cm deep from the surface. To避免击中钢网格，团队要求géosudouest, a surveying company, to precisely locate the buried assets.

Tracing on the go

根据公司的原则；“privilege the person and the quality of work,”Géosudouest专家为客户提供量身定制的有效解决方案。

With the need to locate and avoid the steel grid whiledrilling the holes into the upper apron of the dam, the customer required a real-time tracing and imagining solution.

géosudouest professionals used the LeicaDS2000, utility detection radar together withC-thrue，在钻入混凝土之前，全合一的地面穿透雷达（GPR）精确地可视化和分析。一旦用DS2000检测到钢筋层，该团队就使用C-Thure确认并仔细检查结果。多亏了GPR的双重天线两极分化，团队simultaneously detected the rebars at both deep and shallow levels并确定它们在80 cm深度的范围内的确切位置。

“尽管与密集的钢筋遇到了困难，但Géosudouest团队可以很高的准确性检测到被埋葬的资产。Leica Geosystems的解决方案使我们能够正确地定位每个级别的钢筋位置，”Géosudouest的测量专家BouladeGérard说。

DS2000的自动位置和导航系统increased productivity and saved survey time对于géosudouest。收集数据后，专家分析了与交集的双曲线特征，以估计目标的位置和大小。验证结果后，团队用黄色和橙色线标记了表面，签名了钢筋在不同深度运行的位置。

Revealing reliable data

除非我们拥有超人的奇妙愿景，否则GPR是有效定位地下公用事业的最可靠的工具。准确的扫描和实时分析大坝的上层围裙使团队能够安全地定位和钻探80-cm-deep holes avoiding the rebars crossing at different levels执行所需的维护工作。

The DS2000 and C-thrue revealed reliable data in real time, and the即时的可视化帮助团队做optimal decisions on the spot。