Analysis And Treatment Methods Of The Typical Diseases Of Wanzhou Bridge

Steel concrete composite structures, concrete core with steel ferrule effect, can effectively overcome the brittleness of high strength concrete, to a certain extent, delaying the cracking of concrete. Pipe the pouring of concrete, steel beams making concrete with high bending stiffness and bearing capacity, which can be used as load-bearing structural beam system bridge. As the bridge construction, the old bridge there have been some diseases. In this paper, Wanzhou bridge engineering basis, combined with the actual situation Wanzhou Bridge, elaborated steel concrete composite bridges diseases, Causes and Prevention disposal measures, provide a reference for the practical value of similar design and construction of the bridge, the main results are as follows:First,for the current disease situation Wanzhou Bridge, respectively, at the junction of Bridge pier side beams Wanzhou diseases were investigated and found: Wanzhou Bridge 4 # 9 # pier bearing down there is a big slip rubber deformation is more serious, has been completely lost the slip bearing function, not a good slide reset. The end of the rigid frame truss beams located across the ends of the side, as holder can not properly reset the temperature of the beam will be under enormous force, live load generated by external force, this force by the end of the beams and piers to withstand deformation, deformation of the pier after a certain limit, All external force acting on the steel beams and concrete, concrete thickness at its smaller beam configuration reinforced a limited number of their resistance to external beam ability is poor, resulting in the emergence of a large number of sites in the beams of concrete cracks and broken off;Second,rigid end truss beams located across the ends of the side, which under enormous temperature strength and deformation caused by the live load force, plus bearing not properly reset, so that the force suffered were acting on the beam at the steel and concrete, so rigid frame force by the end of the beam deformation and rigidity to bear pier, pier deformed to a certain limit after which the beam directly affected by the force generated by the endurance of all. Thickness of concrete beams at the ends smaller configurations steel is not strong enough, beamed their lack of resistance, can not afford such a huge deformation force, resulting in a large number of cracks;Third,7 # pier text has found the phenomenon of lateral tilt, high-filling effect on the pier were analyzed, the analysis showed that: Since the pier itself, which the geological environment conditions and subject to lateral pressure and artificial fill in under the leaking pipe rupture leading to rising groundwater levels increased water pressure combined effects, leading to the occurrence of lateral tilt pier 7, resulting in horizontal lines the beams cracking phenomenon;Forth,the paper also analyzes the degree of vertical piers and other diseases, and made a corresponding analysis on this series of phenomena, proposed disposal methods or recommendations;Fifth,Article on the disease and the lateral end of Pier 7 beams were inclined reinforcement design, and the corresponding, more specific implementation measures and recommendations on various diseases phenomenon, but also has a good deal of harm and guidance reference value.