Analysis On Design And Construction Of A Cross-Reservoir Bridge In Mountainous Areas

This thesis discusses in detail the key technologies of the design and construction of a cross-reservoir single-span bridge in mountainous area based on its corresponding construction conditions,including the impact of natural conditions,durability design,design basis,bridge structural design,comparison of schemes,calculation of main structures,construction theory basis and formulation of specific schemes,etc.In this project,the distance between two ends of the bridge on the reservoir bank is about 260m.Detailed discussion of various design and construction schemes is carried out for the purpose of analyzing and researching the design and construction process of the bridge across the reservoir in mountainous area.The main research contents and conclusions are as follows:1.Elaborate the research background.Analyze and study the scheme,structure design and constructionscheme by referring to the status quo and trend of large cross-reservoir bridge in mountainous areaand by combining the features of the bridge project itself.2.Compare the variable section pre-stress concrete continuous rigid frame bridge and half-through bridge steel pipe concrete truss arch bridge by combining the features of the large cross-reservoir bridge in mountainous area,and finally determine the reasonability and feasibility of continuous rigid frame bridge due to good construction ability and the fact it meets all the actual demands.Besides,the details and durability of the bridge are considered.3.Adopt Midas/Civil to establish finite element model to conduct force bearing simulation analysis for the internal force,including the upper and lower part calculation of the bridge,local detail calculation and finished bridge stability calculation etc.to ensure the construction and reinforcing bars of the bridge to be reasonable.4.Considering the various construction condition restriction of the cross-reservoir bridge in mountainous area,the narrow construction space,and deep water,detailed construction scheme is worked out,including the scheme for hoisting over water,drilling in water,cushion cap construction,floating trestle.The construction scheme shall be economic and reasonable which may facilitate the final completion of the project.At present,the bridge has been successfully gathered up,verifying the reasonability and feasibility of the scheme design,structure calculation and construction scheme.It will propel the successful implementation of the project.