The thrust beds of the required size and designed thickness were cast with M25 concrete. Pin pockets of 0.5m x 0.5m x 0.6m size are provided at suitable spacing for jacking arrangements. The sides of pin pockets are provided with a 6mm thick M.S. Plate to take the thrust. The pin pockets are then filled with sand and a small layer of screed concrete is placed on them to get a smooth surface for casting or Box elements.Reference line pillars and TBMs are fixed on the approach to control alignment and level while pushing. One layer of plastic sheet is spread on the thrust bed where the box is cast. A layer of grease is applied to it and again one mere layer of plastic sheet is kept. Box elements are cast on this, so that friction is reduced while pushing.Entire box concreting done with RMC during nights only since the site is in the heart of the city. The top of the box was painted with epoxy paint after casting to reduce friction. Within the box, excavation was done with an excavator. The excavated earth was lifted by winches and stacked during the daytime. The same was transported out during nights. Hard granite rock was met with at the bottom layer and also some big boulders at several locations. The same was removed using pavement breakers. Initially, two elements were cast on both thrust beds. After pushing on the element, the element from the other bed was side slewed to maintain continuity of pushing.Pushing was done with the help of hydraulic jacks. All the S & T cables are protected before pushing. Sufficient ballast is unloaded with the help of division before taking up the pushing.