随着国民经济的不断发展,电力、矿山、交通、石油、化工等建设项目的规模也日益扩大,越来越多的重型设备需通过公路运行,公路桥梁的超载问题不可避免地提上了议事日程。有时还会遇到超过设计荷载很多的特种车辆(如运载大型变压器的平板车),这时,正确评价桥梁的安全度便是一个非常突出的问题。 在众多的公路桥梁中,有不少是建国前遗留下来的石拱桥。这些石拱桥的共同特点是跨径小(无论单孔或多孔,跨径大多不超过10m),拱圈为半圆、实腹,而且大多没有原始技术档案。如何判断这样的老式石拱桥通行特重车辆时的承载能力,是摆在桥梁 With the continuous development of the national economy, the scale of construction projects such as electricity, mining, transportation, petroleum and chemical industry is also expanding. More and more heavy equipment needs to be run on highways. Overloading of highway bridges is inevitably put on the agenda. schedule. In some cases, special vehicles (such as flatbed carrying large transformers) that exceed the design load are encountered. In this case, it is a very prominent issue to properly evaluate the safety of a bridge. Among the many highway bridges, many are stone arch bridges left over from the founding of the People’s Republic. Common features of these stone arch bridge is small span (regardless of single hole or porous, most of the span less than 10m), the arch circle is semicircular, solid belly, and most of the original file without technology. How to determine the passing capacity of this old stone arch bridge especially heavy vehicles, is placed in the bridge