Shape Array
A shape array, also known as a deformation monitoring array, is a vital tool used in the geotechnical monitoring of dams. It consists of a network of sensors strategically placed on or within the dam structure to measure and monitor deformation and movement over time. The array provides valuable insights into the behavior and performance of the dam, helping engineers assess its stability and integrity.
The shape array typically consists of various types of sensors, such as inclinometers, extensometers, and strain gauges, which are strategically positioned at critical locations on the dam. These sensors are designed to detect and measure changes in displacement, settlement, rotation, or strain in the dam's components, including the foundation, abutments, and concrete or embankment sections.
By continuously monitoring the deformation and movement of the dam, the shape array enables engineers to detect and analyze potential issues that may affect the dam's structural integrity. This includes identifying excessive settlement, differential movements, or tilting, which can lead to stress concentrations, cracking, or even failure.
The data collected from the shape array is typically processed and analyzed using advanced geotechnical software and techniques. This allows engineers to interpret the measurements, assess the dam's performance, and identify any trends or anomalies that require attention. The information obtained from the shape array can guide decision-making in terms of maintenance, remedial measures, or even the design of future dam projects.
Regular monitoring using a shape array is especially important during construction, reservoir filling, and operation stages of a dam. It provides valuable feedback on the behavior of the dam under different loading conditions, enabling engineers to make informed decisions and take appropriate actions to ensure its safety and performance.
Best Practices Resources
U.S. Army Engineer Research and Development Center Geotechnical and Structures Laboratory