CAJ | 학술논문

多跨长联连续梁桥的拓宽拼接是高速公路改扩建中的一个难题。本文以佛开高速公路某8×30 m等截面预应力混凝土连续箱梁桥的拓宽拼接实践为例，介绍了影响长联连续梁桥拓宽的关键因素，如扩建荷载标准、混凝土收缩徐变、扩建桥基础沉降和结构体系刚度等，并提出了有针对性的措施，达到了在合理工期内通过箱梁翼缘板刚性连接实现结构一次性整体拼接的目的，取得了较好效果。
다과장련련속량교적탁관병접시고속공로개확건중적일개난제。본문이불개고속공로모8×30 m등절면예응력혼응토련속상량교적탁관병접실천위례，개소료영향장련련속량교탁관적관건인소，여확건하재표준、혼응토수축서변、확건교기출침강화결구체계강도등，병제출료유침대성적조시，체도료재합리공기내통과상량익연판강성련접실현결구일차성정체병접적목적，취득료교호효과。
The widening and the splicing of multiple-span continuous beam bridge have remained two major challenges in highway expansion construction. The paper uses the widening and splicing of a 8 × 30 section-area prestressed concrete continuous box-girder bridge on Foshan-kaiping highway as an example to discuss the key factors in the widening project,which involves the loading standard,the concrete shrinkage and creep,foundation settlement of the bridge and the designing stiffness of the structure as a whole. Therefore the paper proposes the countermeasures accordingly with the purpose of realizing the immediate splicing within the time limit,and the solution lies in the firm connection of the flange plates on the box girder,which has been proved to be effective.