Application Analysis Of Long Span Continuous Rigid Frame Box Girder Artificial Sand Concrete In Chongqing Region

This article is aimed at Wan-li Highway 5 continuous rigid frame box girder application C50/C55 blocked reason carries on the analysis to discuss the artifical sand concrete.Wan-li Highway 5 continuous rigid-frame box girder is proposed C50/C55 artifical sand concrete pouring. But due to the construction unit doubts to C55 sand and above mechanism of concrete strength grade of concrete used in Bridges as the main structure, the application artfical of sand concrete economic benefit, environmental benefit and social benefit is unclear;Combined withthe limitation of the traffic in chongqing local voluntary standards "technical specification for concrete application of highway engineering artificial sand"F90 CQJTG/T-2013. Wan-li Highway 5 sand concrete continuous rigid frame box girder is proposed mechanism work is stop, it seriously hindered the sand mechanism for the development of concrete technology and the popularization and applicationin Chong-qing.Based on the above reasons, this paper combining with the Chong-qing area of long span continuous rigid frame box girder artifical sand concrete application is analyzed, the main research contents and conclusions are as follows:①Introduces the characteristics of large span continuous rigid frame and continuous rigid frame box girder, and the cantilever construction method are introduced.The characteristics and mechanism of mechanism sand sand on concrete performance are discussed, the influence of sand and expounds the mechanism of bridge with concrete characteristics and research status.②Collected from all over the country mechanism sand concrete application examples, compared with the chongqing area, analyzing the characteristics of the Chong-qing region mechanism sand concrete application, and illustrates the label above the C55 mechanism sand concrete application in the bridge structure is safe and reliable. At the same time collected the mechanism of sand concrete around the industry standard, mechanism of sand concrete application level and scope of application structure compared with chongqing voluntary standards, conclude that the chongqing "highway engineering technical specification for concrete application of artificial sand CQJTG/T F90-2013③ Combination with the characteristics of artificial sand concrete to Wan-li Highway C50/C55 mechanism of concrete research, for example, choosing the appropriate C50/C55 mechanism sand concrete mixture ratio.④ Application mechanism of sand concrete in Chong-qing area are the analysis of economic benefit, environmental benefit and social benefit, to Wan-li Highway proposed C50/C55 mechanism sand concrete calculation and analysis, for example, it is concluded that application of reasonable mechanism of sand concrete economic, environmental and social benefit is remarkable.And combining with the characteristics of Chong-qing area and proportion of C50/C55 mechanism sand concrete is recommended.⑤ Finally, combining with the characteristics of Chong-qing area and the artificial sand concrete, from raw materials, design, construction and management, the preparation mechanism of high quality sand concrete quality control measures should be taken.