In Denmark, Construction is all about climate change
Web-based monitoring applied ?for enhanced cost-efficiency
Climate change is real, and a hot topic for governments and industry alike, not the least within the world’s construction business. At the 2015 UN Climate Change Conference in Paris in November, the ambition is to address tangible environmental issues and hopefully close a binding and universal agreement to be followed by all.
In Denmark, climate change leads to increasingly frequent and heavy torrential rain, resulting in flooding where rainwater gets mixed with sewage, causing major damage to buildings and infrastructure.
5o percent of the business
As a direct consequence, water-related projects represent almost half of the construction market in the country today. One example of that is a new 1.3 km long sewage pipeline to be constructed along the strait of Öresund. The pipeline is dimensioned to provide temporary store for large quantities of polluted water and prevent it from discharging into the strait.
Because of the sandy ground, an excavation with sheet pile walls is used for laying the pipe, and piling work generates vibrations that affect buildings along the coastal road as well as breakwaters and embankments.
After a competitive tendering process, the developer commissioned COWI A/S, a leading Danish consulting company, to monitor vibrations throughout that phase of the construction work. The detailed requirements included triaxial sensors, an alarm function with text messages and reporting and web presentation of recordings in accordance with standard DIN 4150-3.
Smooth web-based supervision
15 measurement locations are being established to measure vibrations throughout the piling phase, totaling some 12–18 months. The equipment used includes a mix of INFRA masters with V12 sensors and wireless C12 monitors with built-in logger. Says COWI ´s project manager Jacob Egede Andersen:
“The small and discrete monitors minimize the risk of vandalism when used in public areas. The solution applied also includes an efficient web application that is very easy to use.
To keep the total costs low, it is important to facilitate the supervision of the entire instrumentation. To this end, the set-up also includes an integrated cost-saving reporting function.”
The INFRA system used includes monitoring of both noise and vibrations which has proven to be very cost efficient, and the availability of several sensor options also facilitates the design and implementation of more cost-effective combinations of equipment.