Andrew M. Cuomo announced on Thursday that the L train tunnel would not fully shut down in April as planned. Originally Planned Workers planned to remove and replace hundreds of thousands of feet of electrical cables housed inside the concrete bench wall that runs along the side of the tunnel. Bench wall Bench wall Replace damaged concrete and cables Bench wall Bench wall Replace damaged concrete and cables Bench wall Bench wall Replace damaged concrete and cablesWhat Changes in the New Plan Under the new plan, workers will seal and mount new cables to the side of the tunnel wall, eliminating the need to remove portions of the bench wall and leaving the old cables in place. Reinforcing wrap applied to bench wall New cables mounted here Install bench wall sensors New cables mounted here Install bench wall sensors Reinforcing wrap applied to bench wall New cables mounted here Bench wall Reinforcing wrap applied to bench wall Install bench wall sensorsThe new plan still recommends removing unstable portions of the bench wall, but it proposes that workers reinforce weakened sections of the wall with a fiber wrap. Workers will also install a new sensor system to monitor for cracks or deformations in the bench wall.

Source: New York Times January 03, 2019 22:18 UTC