Recently, at a depth of 42 meters underground in the bustling city of northeast Singapore, as the cutterhead slowly rotates to cut through the soil layer, the southbound shield tunneling of the P102 subway project undertaken by China Electric Power Construction Corporation has officially started. This giant machinery with a diameter of 7.24 meters is advancing along a 2.77-kilometer double track tunnel, marking the critical construction phase of the cross island line Punggol extension.

Starting from an extremely narrow field

The starting well of the project has a depth of 42 meters, but its length is only 39 meters, which poses a huge challenge to equipment assembly due to the narrow space. The construction team innovatively adopted the "split assembly starting excavation conversion" process to complete the hoisting and commissioning of a 102 meter long shield machine in a restricted site, overcoming the problem of insufficient construction sites in urban areas.

Strict standards safeguard urban areas

The tunnel is adjacent to the municipal main road and residential buildings, and the construction vibration and settlement control standards are extremely strict. The project team strictly adheres to local safety and environmental regulations, monitors geological changes in real-time, optimizes excavation parameters, and minimizes construction disturbances to ensure the safety of surrounding buildings and roads. Keywords: the Belt and Road news, railway shield

Technological breakthroughs and escort construction

This launch marks the entry of the project into the main construction fast lane. In the subsequent construction, the team will continue to control the safety and quality of excavation, refine the control of ground subsidence, and make every effort to promote the connection of double track tunnels, contributing to the improvement of Singapore's rail transit network.Editor/Gao Xue