Research on Influence of Pile Foundation Construction on Adjacent Existing Twin-arch Double-deck Tunnel

Twin-arch double-deck tunnel is a new tunnel structure. It is of great practical significance to alleviate the pressure of urban traffic. With the high-speed development of the national economy in China, its application will be more widely in the city. The study on construction mechanics behavior and adjacent construction effects of twin-arch double-deck tunnel is very little. Relying on twin-arch double-deck tunnel of Longhui road in Zigong city, its construction mechanics behavior and adjacent construction effects were studied by three-dimensional numerical simulation techniques. It shows that: tunnel structure can meet the force requirements before the pile load is imposed; Although the unfavorable change of structure stress has happened after imposed pile load, tunnel structure still meet the force requirements. Research results provide references for design and wide application of twin-arch double-deck tunnel in the city.