Tunneling (V)
Execution area VOD
Trenchless manned laying of drains and sewers using open controllable shields under compressed air.
Quality mark holders of group VOD also meet the requirements of group VO.
Quality mark holders of group VOD also meet the requirements of group VO.
Execution area VO
Trenchless manned laying of drains and sewers using open controllable shields without compressed air or manned laying based on mining construction techniques. A limitation to mining construction techniques is stated on the award certificate.
Quality mark holders of group VOD also meet the requirements of group VO.
Read more →Quality mark holders of group VOD also meet the requirements of group VO.
Execution area VMD
Trenchless laying of drains and sewers using enclosed controllable shields and support of the heading face through liquid using compressed air or earth pressure (e.g. mix or EPB shield).
Quality mark holders of group VMD also meet the requirements of group VM.
Quality mark holders of group VMD also meet the requirements of group VM.
Execution area VM
Trenchless unmanned laying of drains and sewers using controllable methods in micro-tunnelling using augers and slurry conveyors.
Quality mark holders of group VMD also meet the requirements of group VM.
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Quality mark holders of group VMD also meet the requirements of group VM.
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Execution area VP
Trenchless laying of drains and sewers using controllable pilot pipe methods and comparable controllable methods. A limitation to product pipes ≤ DN 150 is stated on the award certificate.
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