Study on the Influence Mechanism of Soil Deformation Induced by Shield Tunnel Construction

Abstract The construction of shield tunnel will adversely affect the surrounding soil and is prone to safety accidents. This paper focuses on problem deformation induced by construction. Based theoretical mechanics Mindlin solution, caused frontal thrust, friction force formation loss linearly superimposed, accurate calculation formula derived in time space. Relying finite element software Midas GTS NX, three-dimensional dynamic simulation double-line was carried out, law stratigraphic during obtained, influence mechanism different burial depths studied. Finally, it proved that settlement curves surface layer continuous excavation unloading were consistent with Peck, extremes pilot slightly larger than those latter tunnel.