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 inrnthe outer of box culvert then forming pipe roof in which the box culvert is pushed.rnThe box culvert attitude control is very important to the channel’s clearance andrnslope in the process of box culvert being pushed within pipe roof. Firstly the pipernproof attitude control is studied in this paper. At the same time the computing modelrnof box culvert is set up to analyze its deviation on the assumption that the pipe proofrnis an elastic foundation beam. The affecting factors such as excavation length,rngrouting pressure and excavation speed are also studied. Then the technology ofrnhorizontal and vertical attitude control of box culvert is researched in thernconstruction project. These research results have theoretical and practicalrnsignificance for box culvert construction.