Nicely referred to horison, but I really can figure it out why they put there the second and third row of pylons under all the bridge ties. Lateral stiffness reinforcement perhaps.
It is amazing how Pinkbike community always explains everything better. www.lusas.com/case/bridge/diaphragm.html Just behind the main pylons there are three sections suspended as well as standing on some two pairs of columns. This is generally weird. A net of ties usually does not go to an anchor point (net to the point?). There must have been issues with geology, fundations or hydrodynamics, or all of the sections are anchor points to spread loads more evenly. The last option could have an result in a change of shape of these columns, because if the sections are anchor points, there is more force pulling it upwards than pushing it downwards. If the columns are to prolong the pulling forces to the fundations, they are just too vertical to do this. Either it was meant to look like this for esthetics only (very unlikely), or there were some issues with geology. Otherwise it is a wasteful solution. It is too expensive to be wrong, so surely there is something unique in this part.
this bridge is made to handle bad ass earthquakes like the ones we had before,and this big part of the bridge the deepest spot of the river as well..its always sweet to travel 17.2km on that bridge