Tunnel Kupjak remediation
Tunnel Kupjak is located on the railway M202 Zagreb GK – Rijeka. Due to a present hidrogeological barrier the right precutting of the tunnel collapsed in a period of increased precipitation. A remediation design was made on the basis of conducted geotechnical exploration and investigation. Provided measures included tunnel heading remediation in the entry part of the tunnel, installation of a bearing net on the existing stone wall, construction of a new reinforced concrete wall and installation of self-drilling anchors and drains. Measurements and observations of provided measures were conducted during the construction and exploitation phase.