He Fu Railway Tongling Yangtze River Bridge 3# Caisson Construction Calculation and Analysis

Deep water caisson foundation is the focus and difficulty of bridge foundation construction,because of its large scale,bad construction conditions and complex construction technology.Taking Tongling Yangtze River bridge railway 3# caisson construction as the basis,this paper detailed construction calculation and analysis method of construction scheme of open caisson.According to the steel open caisson floating stability calculation results,the floating body under the condition of whole section with high method is feasible;Through the positioning system and positioning calculation,steel open caisson in distance from bottom bed 3M position can realize precise positioning by adjusting the anchor rope prestress,sidewall injection after rapid sinking anchor rope stress safety bed process caisson sinking calculation;the results can guide the borehole sampling process.