E-LINK, AN INTERNET-BASED real-time monitoring system from Instantel, is helping the project team keep a close eye on blasting and construction vibrations on the Stockholm Southern Link project in Sweden (see left).
The link is part of the second phase of a new ring road around the Swedish capital. It involves construction of 5km of road beneath the southern suburbs of the city.Work is being carried out by Swedish firms Ansvarsbesiktning (Ansvars) and Byggmastartjanst.
Sweden's strict standards for the impact of construction on the natural and urban environment means blast data has to be delivered to the project team and the client immediately after an event. As there are 73 seismographs along the alignment, manual retrieval of data is virtually impossible, says Instantel.
E-Link automatically retrieves the data from the monitoring stations using Instantel's BlastWare III software. Ansvars' BlastMate monitors can be programmed to automatically download data to a remote PC.The data is then sent to a database for uploading to the website.
Users log into the password-protected website to view the data through a conventional web browser then simply click on a monitoring station on the project map to see detailed peak particle velocity results, as well as the exact location of the station and the project name.
Clicking on the waveform icon in the results table displays a detailed waveform of the event showing peak information. Instantel says the system allows any number of users to view the data at the same time.