Study Of Scheme Comparison For Jinshuigou Large Bridge

This article studies the large bridge across the Jinshuigou Ravine in the108nationalroad in terms of the brighe location, plan, main structure size, structure analysis of the staticand dynamic, and techinical and the cost, aiming at giving the feasibale and practicalsolutions.First of all, according to technical data of the geology, hydrology, five kinds of bridgetype alternatives have been drawn up: a long-span prestressed concret continuous rigid framebridge(different span of main bridge and approach bridge composed), a prestressed concretT beam bridge. Secondly, the special bridge program has been applied to the intensity ofbearing capacity and normal use stress check calculation. The results show that the structurecan meet the standard requirements. and a dynamic analysis has been carried on the aboveone kinds of bridges，this kinds of bridge6~10order fundamental frequency and thecorresponding vibration mode have been presented. According to the dynamic analysis modeland the ground motion input, E1and E2stage of the bridge internal force and displacementcalculation have been made to each control section. The calculation results show that thekinds of bridges can meet the requirements of seismic code.Finally, a comprehensivecampariosn of the technical safety, the maintenance later and the cost of the bridge has beencarried out, and a recommended scheme two for a long-span prestressed concret continuousrigid frame bridge has been formed.The research result has been applied in practical engineering, providing the main basisfor the preliminary design and the construction drawing design of the bridge.