Research On The Project Of Dismantling And Redesign Of JiuJiang Bridge In Guangdong

The bridge, as a structure of a kind of span ground obstacle, in constructing and operation course, certain risk that always accompanied by, and they can cause the project accident, even personal security accident under certain condition.In recent years, bridges that in many countries in the world bump into by the vessel, cause the great accident that bridge destroyed and people lost, not only cause the great economic losses but also bring the bad social influence. With the constant development of communications and transportation, the increase volume of ship sailing in harbor and rivers opening up to the shipping, bridges which consider anti-collision question in design smash into the misfortune repeatedly. According to the analysis of the statistical data, the incident of the vessel knocking into the mound and destroying the bridge already becomes the sharp problem that the circle of bridge engineering faced. The incident always lead to the serious consequence that bridge collapse, ship sink, people die and main transportation line by land and water break down for a long time, and the expenses rebuilding the bridge and dredging the channel are very surprising.Before this, although the accidents of the vessel bumping into the bridge happen constantly in our country, the great accident which large-scale bridge collapsed has not happened yet after the ship knocking into the bridge.In June of 2007, an incident happened that a ship carrying sand bumped into the pier of Jiujiang bridge in Guangdong in Chinese national road 325, the cause of accident was because the ship carrying sand was operated violably and sailed into the none-main channel and bumped into the pier and leaded to the fact that the bridge collapsed, the Jiujiang bridge pier was knocked into and broken on the spot, 200m bridge steps and thereupon collapsed. This text regards the Jiujiang bridge in Guangdong as the project background, combines the testing result to the structure of monitoring center, and on the foundation of analyzing to the result of measuring, according to removing proposing, makes the scheme of removing with rational security. At the same time, comparing and analyzing the maked scheme and other schemes from the aspect as following :the remove of the temporary reinforcement work, construction security of removing ,the residue salvaging, the cost of bridge repairing and constructing on later stage, dependability etc. , point out the quality of each scheme, offering reference for the similar bridge's removing.