UNIQUE CORNER JOINTING SYSTEM – NO SOLID CORNERS
Cracked or damaged segments caused by corner point loading has traditionally been a problem faced by tunnelling engineers and designers.
VIP’s Cast-in gasket are designed specifically to eliminate thí due to the unique patented (GB2541978-International patent pending) corner jointing system.
This has allow us to dramatically reduce the volume of rubber at the corners, thus ensuring the gasket can collapse into the groove
MINIMISING RUBBER VOLUME AT THE CORNER JOINT
VIP’s unique jointing process results in the profile of the gasket being maintained up to the corner edge.
This differs to a traditional shot-joint corner which can result in excess rubber travelling along the gasket voids during the moulding process and this results in making the gasket unable to compress at the corners due to the voids being full of rubber, creating a ‘Solid” corner.
The energy exerted at these points during closure of the segments can lead to cracks and spalling as it dissipates through the segment, finding the path of least resistance.
CORNERS ANGLE PERFECTLY MATCH THE SEGMENT
VIP’s can manufacture corners for cast-in gasket to obtuse, acute and 90° angles, therefore matching the profile of the segment design perfectly.
Segment design can differ with each project. Recognising this and the importance of the gasket matching the exact shape of the segment, VIP can also cary the profile orientation along the Z axis.
Further profiles are available or can be developed on request to meet specific design requirements
Details TDS size & shape will submit upon request