Research on Attitude Control during Box Culvert Being Pushed Within PipeRoof

摘要

Technology of box culvert within pipe roof is firstly pushing small diameter pipes in the outer of box culvert then forming pipe roof in which the box culvert is pushed. The box culvert attitude control is very important to the channel's clearance and slope in the process of box culvert being pushed within pipe roof. Firstly the pipe proof attitude control is studied in this paper. At the same time the computing model of box culvert is set up to analyze its deviation on the assumption that the pipe proof is an elastic foundation beam. The affecting factors such as excavation length, grouting pressure and excavation speed are also studied. Then the technology of horizontal and vertical attitude control of box culvert is researched in the construction project. These research results have theoretical and practical significance for box culvert construction.