Cast-in-situ Composite Hollow Slab Bridge Detection And Evaluation

Since the reform and opening up, China’s highway construction industry has developed rapidly, especially since the seventy or eighty’s of last century, set off around the infrastructure boom. Up to now, the roads in particular bridge has been in operation for more than30years, coupled with the impact of the current construction level, material constraints, design idea, many bridges have the disease period. Especially in recent years, the rapid development of logistics industry, the vehicle has increased year by year, the overload It is often seen., seriously affecting the safe operation of the bridge, the country has also repeatedly bridge accidents, causing serious economic losses and social impacts.Cast-in-situ composite hollow slab is built in this period, the bridge deck is divided between two times of pouring. Due to the web, roof is concrete, in conjunction with the web plate hollow plate surface is not vertical bar connection, combined with the surface only on cement paste adhesive, adhesive surface will be the weakest position in the structure, its tensile, shear strength is far less than their own concrete strength. Extremely easy to cause the crack between the bottom plate and web, and even the emergence of bridge plate fracture.For the analysis of cast-in-situ composite hollow slab bridge current operation situation, stress conditions, selection of typical bridges in service. Using different detection methods, the distribution characteristics of bridge disease identified, analyzed the reason of bridge disease, investigated the traffic bridge; the bridge static load test, analysis of bridge floor load-bearing capacity, finite element analysis for internal force analysis of cast-in-situ composite hollow slab bridge, the bridge disease repair and reinforcement suggestion.