ethzurich underIn land-scarce Singapore, not only is there a need to optimise the use of limited surface land, the use of underground spaces should also be planned for. In Singapore, as in many other parts of the world, the use of underground spaces may range from the visible to the less visible. Most of us are familiar with the use of underground spaces for building basements, pedestrian underpasses, vehicular tunnels (e.g. expressways such as the CTE, KPE, MCE) and MRT stations and tunnels. At the other end of the spectrum, there are also the ‘unseen’ structures such as common services tunnels in the CBD and utilities infrastructure for power, sewer, gas, telecommunication, drainage, and water.  Read More