东北地区跨径最大的无粘结部分预应力混凝土简支箱梁桥在靖宇县境内营抚公路上建成通车。该桥单跨25m,桥全长30.34m,该桥的顺利建成为公路桥梁预应力技术在我省的发展探索了新的技术途径。该工程为省科委“公路桥梁无粘结预应力混凝土技术应用研究”的依托工程,由吉林省交通科学研究所承担该研究项目。在研究过程中,进行了室内二十片小梁试验以及相应的理论分析,在此基础上进行 Northeast region of the largest span of non-bonded partially prestressed concrete box girder bridge in Jingyu County camp on the road was opened to traffic. The single span of the bridge is 25m, the total length of the bridge is 30.34m. The successful construction of the bridge has explored a new technical approach for the prestressing technology of highway bridges and bridges in the development of our province. The project for the provincial Science and Technology Commission “highway bridge unbonded prestressed concrete technology research ” relying on the project by the Jilin Provincial Institute of Transportation Science to undertake the research project. During the course of the study, twenty trabecular interior tests were carried out and the corresponding theoretical analysis was carried out, on the basis of which