Numerical Simulation Of Suspension Bridge's Tunnel Anchorage Analysis

With the rapid development of Chinses modernization drive in bridge construction, people pay more and more attention to the scheme of the long-span suspension bridge. The anchorage is very important in the design and construction of suspension bridges. Above all, tunnel anchorages attract increasing attention, because it can greatly reduce the project cost, moderately bear the force of construction structure, and less damage the surroundings. So it is becoming a very important subject to research the durability and to improve the durability in design and construction.This paper introduces the theories about the structure, the mechanism of action, and the stability of tunnel anchorages. What's more, it elaborates on FLAC3D's basic function, characteristic, advantages, the cell model, the constitutive relation, and the solving process.The main research covers the choices of the rock model based on the FLAC platform, the establishment of initial stress field in the anchorage region, and the touch between cofferdams and anchor plugs.Based on the topographic and geologic characteristics of anchorage region, this paper is a subject that studies the anchorage and the wall rock of Pulitzer Bridge. Besides it factually analyze the process reaction in excavation, building, and normal running of the wall rock in Pulitzer Bridge tunnel by 3-d nonlinear finite-difference FLAC3D. Here are the main conclusions:(1) After excavation, the displacement and stress become less. The rock-soil should be strengthened to ensure the next stage of construction because of the rock-soil's intilted tendency around the anchorage hole.(2) In the pull of hawser above three, five times, the displacement is less, plastic flora of small, and the tunnel anchor, as well as cofferdams, remains safe, which makes the work normally running.This paper evaluates the systemic safety of Pulitzer Bridge, and can provide the basis for decision-making in design and construction.