The construction of the tunnel for the Channel Tunnel Rail Link (CTRL) project in London afforded the opportunity to obtain valuable case studies on the effects of tunnelling on piled foundations. The tunnel alignment was generally set to avoid interaction with overhead structure, but due to the depth of penetration of the piles supporting major bridges, tunnelling had to be carried out relatively close to the piled foundations of the bridges. This paper describes three case studies, briefly describing the assessments carried out prior to tunnelling under these bridges in London as well as selected monitoring results obtained as the tunnels advanced underneath the bridges.
LOAKSI:
Ruang Koleksi Umum
Rak