Investigation about Reconstructive Technology of Widening for RC Arch Bridges

Reinforced concrete arch bridge fight wide transformation technology is put forward with the growth of traffic and highway technological innovation , China has a lot of the old bridge deck width of less than highway rating requirements , or traffic surge capacity is not enough bridges often become a \In order to improve the capacity of the bridge , the suitable route to fight wide reconstructed highway grade requirements in urgent need of the width of the narrow old bridge to fight wide transformation . This paper first introduces the common diseases of the reinforced concrete arch bridge , followed by targeted treatment countermeasures . Second, the proposed reinforced concrete arch bridge to broaden technology , introduced the common form . Subsequent focus leads to a reinforced concrete arch bridge the fight wide transformation technology research ideas and programs . Guizhou Province, a span of 30 meters of reinforced concrete arch bridge in the accuracy of the calculation in order to verify the theoretical research background . Original arch bridge structure due to the lack of deck width , can not meet the the local rapid growth of traffic demand , at the same time , taking into account the current carrying capacity can not meet the new requirements of the load rating of the original arch bridge structure during fight wide transformation technology on the basis of the original arch bridge structure reinforcement and bug fixes . The fight wide transformation technology research reinforced concrete arch bridge , new , old arch bridge arch ring at the bonding surface side , the creation of an integral bridge deck for the position at the laying of the shear reinforcement . In the new , the old arch ring at the joint surface , anchor bar , to be implanted in the the original main arch concrete structure through Anchorage on the old and the new arch ring together into a whole new ring structure pouring . Achieve the common purpose of the force and the overall work . Fight wide arch bridge bridge load test . Learned from the results of the static and dynamic load tests , verification fight the feasibility of the method of wide transformation technology of old reinforced concrete arch bridge . Fight wide transformation technology at the end of this article , the arch bridge social and economic benefits were evaluated its benefits are ideal .