Analysis And Study Response Of Pile Foundation Adjacent To Tunnelto Shield Advancing

Tunnel projects usually occur in city where high-rise building and elevated bridge etc have badly concentrated. High-rise building' foundations usually are pile foundation. Due to restrictions made by tunnel line and underground space, tunnels are built inevitably adjacent to pile foundations of present building. Construction of tunnels aroses inevitably displacement of around soils and soils displacement can bring additional internal force and displacement to pile foundation, which can bring hidden troubles to regular service and safety of building, such as building lean and wall crazing. It bears important practical signification to study influences which tunnel construction brings to present building pile foundation adjacent to tunnel.This thesis further develops finite difference software-FLAC^3D basing on it and compiles program using FISH language included in FLAC^3D software to simulate 3-dimension dynamic shield tunnel construction. Considering study of soil displacements law is precondition to study responses of pile foundation, soil displacements law around shield tunnel during tunnel construction have been studyed in chapter 3 of this thesis. Considering different relative space position between tunnel and pile foundation, the responses of pile foundation adjacent to tunnel to dynamic shield tunnel construction have been studyed in chapter 4 of this thesis. Moreover influences of Young' modulus, length and radius of pile to pile foundation adjacent to tunnel have been studyed in chapter 4 of this thesis. Some conclusions have been educed which may guide practical project. In the end matters need attention when tunneling adjacent to pile foundation have been brought forward and construction measures of tunneling adjacent to pile foundation have been summed up in chapter 5 of this thesis, which can be used for reference of similar project in practice.