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 holes进入钢筋混凝土，其中三层位于三个不同的深度（10、30和50厘米）距表面深处。到avoid hitting the steel网格，团队要求GéoSudOuesT是一家测量公司，可以精确找到埋藏的资产。

Tracing on the go

In accordance with the company’s principles;“privilege the person and the quality of work,”GéoSudOuest experts deliver tailor-made, effective solutions for their customers.

需要定位并避开钢网格drilling the holes into the upper apron of the dam, the customer required a real-time tracing and imagining solution.

géosudouest专业人士使用了莉卡（Leica）DS2000，实用程序检测雷达与c-thrue, all-in-one Ground Penetrating Radar (GPR) to precisely visualise and analyse in real time buried assets before drilling into concrete. Once the layers of steel bars were detected with the DS2000, the team used the C-thrue to confirm and double check the results. Thanks to the dual antenna polarisation of both GPR, the teamsimultaneously 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，”said Boulade Gérard, surveying expert at GéoSudOuest.

The automatic position and navigation system of the DS2000increased 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

Unless we possess Superman's wondrous vision, GPR is the most reliable tool for effectively locating underground utilities. Accurate scanning and实时分析of the dam’s upper apron enabled the team to safely locate and drill the80-cm-deep holes avoiding the rebars crossing at different levelsto perform the maintenance work needed.

The DS2000 and C-thrue revealed reliable data in real time, and thereal-timevisualisationhelped the team to makeoptimal decisions on the spot。