Construction and Control Technology on High Pier and Long Span Continuous Rigid Frame Bridges
|Course||Traffic and Transportation Engineering|
|Keywords||High Pier Continuous Rigid Frame Bridge Construction Control Sunshine Temperature Effect Stability Analysis|
In this paper,, Huangling an, Shaanxi Province, Yan'an Expressway Luohe Bridge construction. Luohe Bridge is an oversize prestressed concrete continuous rigid frame bridge span arrangement for the 90 3 × 160 90m, highest pier 143.5m, the main beam with cantilever pouring cradle construction. Bridge set high pier cross in one construction requirements, technical difficulty, it is necessary quality control of high pier construction, cantilever construction of linear control and stress monitoring system study concluded, for similar bridge design and construction of the accumulation of construction experiences. Luohe Bridge project example, do the work of the following six areas: 1 Introduction Key Construction Technology of Luohe Bridge, including high pier construction within slip valgus template technology, light hanging blue technology, the main beam concrete construction technology, prestressed technology and disease prevention and treatment, reinforced the connection, for the construction of similar bridges accumulated experience and provide a reference. 2, combined with the characteristics of high pier and long span continuous rigid frame, discusses the purpose of the construction control, content, method and error adjustment theory to provide a theoretical basis for Luohe Bridge Construction Control. 3, Luohe Bridge, for example, analysis - span continuous rigid frame bridge with high piers and the construction of the main beam linear, stress, temperature monitoring content, methods, instruments and measuring points, as far as possible to meet engineering requirements the premise, reduce equipment requirements and reduce observations workload. 4, combined with the Luohe Bridge linear control practices, high pier and long span continuous rigid frame bridge cantilever construction of linear control theory in the concrete realization of the engineering practice. By comparison of the calculated and measured deformation values ??of the main beam theory, summed up the main beam deflection deformation law. 5 elaborate Luohe Bridge construction control flow analysis model, linear control results of the determination of the elevation of Elevation and Luohe Bridge. Luohe Bridge closure elevation control results show that reasonable based structure calculation method and parameter identification method. The Sunshine Thermal analysis showed that the high pier and long span bridges \maximum cantilever stage of the structural stability of the lowest coefficient of only 4.8 to 10.3 after the bridge. To improve the structural stability of the outside of the low-level instability are surface instability increase pier Crossbars quantity effect.