Alpha developments eu

Bridge Surveys

Bridge deck condition mapping using NDT techniques

Roadscanners has performed extensive research and development work in order to develop further NDT techniques and their data analysis with the aim to better map the condition of bridge decks. These techniques are used both for network level bridge asset management and for project level in detailed bridge diagnostics. NDT techniques that are mainly used in these diagnostics are GPR data analysis, thermal camera surveys and laser scanning.

Increasing the lifetime of bridge deck

The main tool in bridge surveys has been Ground Penetrating Radar and roadscanners has been using several 2d or 3D GPR systems in these surveys. The focus in network level bridge surveys is to collect, analyse and report early phase deterioration indicators for the whole bridge deck. Based on the survey results a proactive maintenance plan can be created which will considerably increase the life time of bridge decks and result in major savings regarding bridge deck rehabilitations. In project level surveys the focus is mainly to map deteriorated areas and their depth on the bridge deck to provide information for repair design.

Quick and cost effective way

GPR bridge deck survey is a quick and cost effective way to provide combined analysis results concerning:

• Internal structure exploration through 2D and 3D underground maps
• Bridge problem diagnostics
• Layer thicknesses determination
• Voids and delamination detection and location
• Water infiltration and chloride contamination location in concrete
• Subsurface utilities detection and location

Thermal and laser scanner remission maps are indicating anomalies on the bridge deck that enable better localizing the damaged areas to be repaired.