ODIS – Online Dam Information System
Significant project data:
- Configuration of an Arch-Gravity type dam of a height of 90m.
- Combination of Inspection Data with a 3D model, with more than 200 sensors and more than 10 years of historic data.
- Incorporation of photos and forms of visual inspection, corrective and preventive maintenance.
Purpose of BIM use:
- To develop a Dam Safety Management Platform
- To combine BIM technology with Inspection
The aim is to develop an online Dam Information System (ODIS). Its objective is to increase the safety of dams, managing and organising all of the information provided by the surveillance and inspection tasks in real time, while making it accessible on a single platform in a simple and intuitive manner.
The aim is to manage knowledge about the safety conditions of dams associating all of the observations and data of inspection on the three dimensional model of the structure.
Description of the success achieved:
A model has been developed that allows inspection data and pathologies to be visualised through visual inspections in a clear manner in a three dimensional model. Photos were assigned to the corresponding dam zones with the aim of combining visual inspections and inspection data upon evaluating the security condition of dams.
With online form management, preventive and corrective maintenance works can be carried out in an organised and very effective fashion. The forms are prepared with mobile devices in situ and are loaded automatically through a sharepoint server in ODIS.
The main elements of ODIS are as follows:
- Mobile data acquisition: The forms that can be managed on portable and mobile devices provide facilities to the inspectors to carry out the photographic documentation, the visual inspections, the maintenance tasks, the registration of data of the sensors and the revision of the information about their location. These integrated data are sent to the common database connected to a website, which allows them to be accessed by all members of the project.
- Structure information system in 3D (BIS 3D): It combines a 3D model of the dam with information about monitoring and safety: maintenance tasks, visual inspections and monitoring data provided by DAMDATA. An interpretation has been established oriented at objectives at the structure safety level through a two-way connection between the 3D model and the information provided.
- DAMDATA: It provides all of the tools necessary for managing the monitoring data in real time and transforming them into valuable information. It includes SCADA views, configurations of values with flexible and multiple thresholds for each sensor and numerous options for visualising the monitoring data in a multivariable manner. The statistical model allows a more detailed analysis of the data and the prediction of different future scenarios. The administrator of warnings, events and alerts incorporates the configuration of emergency plans.
- Manager interface: It presents all of the data brought together in a database from an analytical perspective. The diagrams show filtered data, they indicate the state of processes underway and help to give a quick overview of an individual component of the structure, the structure as a whole or a group of them with only a few clicks. It incorporates additional systems such as GIS (Geographic Information Systems), Google maps, etc. in order to provide the client with a summary of all the projects underway.
As a pilot project a three dimensional model of a 90 metre high arch-gravity dam was prepared, including all of the main elements of the structure and all the monitoring system. The monitoring data and the forms for carrying out tasks of maintenance and visual inspections, including verification lists and photographic documentation, were prepared and related with the corresponding elements in the model. The anomalies observed were recorded and categorised, such as filtrations, cracks and landslides, and they could also be indicated with markers in the 3D model. In this manner, the 3D model becomes a visual library that includes all of the significant observations of the useful life of the dam.
On one hand, the data in the database can be chosen, while the location of selected sensors, forms, photos and drawings are displayed in the 3D model. On the other hand, the sensors or zones in the 3D model can be chosen, thereby filtering the corresponding data in the database. As such, all of the documentation relating to cement, certain blocks or joints can be seen with a few clicks of the mouse.
In summary, BIM technology can be applied to administer information about the safety of infrastructure in an innovative and efficient manner. The understanding of the real level of safety of the structure may increase through synergies between the different types of information provided and allowing a goal-oriented interpretation. The result is the transformation of a high quantity of complex data into useful information that is easy to understand.
Monitoring data can be accessed easily and in real time, as well as the photos and forms created during the visual inspections and maintenance tasks with portable devices. In this manner the decision-making process is accelerated, which helps gain time and reduce costs.