| Prestressed concrete continuous rigid frame bridge under construction due to its good mechanical properties, long span capability and other advantages, in recent years, is widely used in highway, but it is incompatible with: cantilever construction period due to many factors, such as closure order, have a greater impact on the bridge design linear and internal forces, and in the latter part of the operation process, a lot of long-span continuous rigid frame bridge appear across the span of the next beam deflection is too large, and cracks and other issues, a serious impact on this bridge type of normal use. Based on previous studies of learning and work, in order to bridge the YuZha(99 + 180 + 99 m three-span continuous rigid frame bridge) as engineering background, surrounded by a large span prestressed concrete continuous rigid frame bridge construction control Hop Long research program.This paper introduces the basic theory of construction control, combined with practical engineering, construction using adaptive control theory, and the theory of linear and stress measurement and analysis of the data over the course of construction of the bridge, come pouring stage and cantilever beam side, linear and cross-section of the closure stress control results. Closure of error control, under control, and predict the operational phase shrinkage,creep constant load on the front elevation beam ideal linear beam effects and laying II.Papers of the bridge closure plan has been studied by the model simulation analysis,were established in the cross first side span, the first in the cross behind the cross and full-bridge only once in three dragons different closure program model, using the model calculated as Bridge and operating for 10 years and force two linear condition of the main beam. Through the analysis under the beam displacement and vertical deflection tensile stress better than to come to closure plan, the construction process similar bridges provide some basis. |
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