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本文回顾了混凝土拱桥在近代的发展,着重说明先进施工方法的采用,使这种古老桥型获得新的进展,特别是我国所创造的完整的一套混凝土拱桥的施工方法——装配组合法,使得混凝土拱桥成为我国公路桥的主要桥型之一。还简要介绍了与我国现行的施工方法相适应的混凝土拱桥的新桥型及其特点,对软土地基上建造混凝土拱桥影响结构质量的关键问题作了探讨。指出了路基高填土不均匀沉降引起桥台转动是造成混凝土拱桥病害的根本原因。文中也还介绍了混凝土徐变对拱桥的变形与内力的影响,拱桥的空间作用与组合式桥台按变形协调原理设计的研究成果。
This paper reviews the development of concrete arch bridges in modern times, emphasizes the adoption of advanced construction methods, and makes new progress in this kind of ancient bridge types, especially the complete construction method of a set of concrete arch bridge created by our country - assembly combination method, Making the concrete arch bridge become one of the main bridge type of highway bridge in our country. The new bridge type and its characteristics of concrete arch bridge, which is suitable for the current construction method in our country, are also briefly introduced. The key problems that affect the structure quality of concrete arch bridge on soft soil foundation are discussed. It is pointed out that the fundamental reason for the disease of concrete arch bridge is the rotation of abutments caused by the uneven settlement of subgrade fill. The paper also introduces the influence of concrete creep on the deformation and internal force of arch bridge, the space effect of arch bridge and the research results of the design of combined abutment according to deformation coordination principle.