| The traditional production process of small prestressed box girder has been verymature, but with the development of numerical control technology and along with theNational Highway Construction standardization requirements proposed, the issues offurther enhance the construction process of the prestressed small box-girderproduction and achieve its fine, intelligent, standardization emerged.In this paper, four key construction technology of the steel processing, tensioningthe tendons, duct grouting and conservation have been analyzed，and formed a set ofcovers high-tech technology construction process for small box girder. Four newtechnologies of CNC vertical rebar bending technology, smart technology tension thelarge circulation intelligent grouting technology and high-voltage remote conservationtechnology have been introduced to Jinqi Highway Dongfeng Bridge Project andaccording to the new technology for construction.Through the practical application of new technology, fully confirmed that the newtechnology is superior to the more traditional technical performance in many ways,four new technologies to reduce the use of human resources, reduce quality defectscaused by human factors, objective Construction standardization. Dongfeng Bridgecost144million yuan, CNC vertical rebar bending technology can cost about542,000yuan, intelligent tensioning technology cost savings of approximately4.2million, thelarge circulation intelligent grouting technology can cost about74,000yuan, highpressure remote conservation technology can be cost savings of approximately6.9million, for a total savings of about72.7million. Meanwhile, the application of fournew technologies to improve the quality of small box girder, post-maintenance andrepair costs will be greatly reduced.Through actual engineering, proved the rationality of the application of newtechnology, realize the small box girder construction of sophisticated, intelligent andstandardization. |
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