There always is water standing in depression of urban overpass or under-crossing tunnel, therefore it is very necessary to set up a monitoring system for road waterlogging.

After 15 years of construction work, the 9.5-meter (31-foot) wide drilling machine will bore through the remaining 1.5 meters of rock to join two ends of the tunnel some 2,000 meters under a mountain.

The interval shield tunnel of Urban transit line 11 in Shanghai is situated closely under the group piles of the National Key Laboratory for Ocean Engineering of Shanghai Jiaotong University.