Position monitoring of a gasket between tunnel segments

A method for monitoring in time a geometric property of a gasket, the method comprising:

• measuring, with a sensor, indications of position for a plurality of gasket surface portions at different measurement times and relative to a reference associated with at least one of a plurality of tubular structural members of a tunnel;
• deriving, with a processor, indications of displacement for each of the gasket surface portions based on the indications of position measured by the sensor;
• comparing, with the processor, the indications of displacement for each of the gasket surface portions to at least one threshold value, and
• generating a warning message for an operator if at least one of the indications of displacement transgresses the at least one threshold value,
• wherein the gasket sealingly interconnects and extends along a path between adjacent edges of two structural members of a plurality of tubular structural members of the tunnel of an at least partially subterraneous and/or immersed structure,
• wherein the tunnel extends in a longitudinal direction and has an interior region, and wherein the gasket forms a closed annular trajectory along the adjacent edges of the two tubular structural members.

A non-transitory computer readable medium storing instructions, which when executed by one or more processors that is/are communicatively coupled with a sensor in a sensor system, cause the one or more processors to:

• measure, with the sensor, indications of position for a plurality of gasket surface portions at different measurement times and relative to a reference associated with at least one of a plurality of structural members of a tunnel;
• derive, with processor, indications of displacement for each of the gasket surface portions based on the indications of position measured by the sensor;
• compare, with the processor, the indications of displacement for each of the gasket surface portions to at least one threshold value, and
• generating a warning message for an operator if at least one of the indications of displacement transgresses the at least one threshold value,
• wherein the gasket sealingly interconnects and extends along a path between adjacent edges of two tubular structural members of the plurality of tubular structural members of the tunnel of an at least partially subterraneous and/or immersed structure,
• wherein the tunnel extends in a longitudinal direction and has an interior region, and wherein the gasket forms a closed annular trajectory along the adjacent edges of the two tubular structural members.