论文部分内容阅读
一、概况云南省交通运输基本以公路运输为主。尤其解放以来,修建了大量公路桥梁,其中五、六十年代初期修建的桥梁荷载等级为汽-13级或小于汽-13级。随着国民经济的发展,运输量增加,大型车、重型车逐渐增多,许多桥梁原设计承载能力已不能适应交通发展的需要,加之有些桥梁设计不尽合理,施工质量差和其它原因,使桥梁加速老化,病害发展,严重危及正常使用。为维持交通现状和发展的需要,应尽可能利用现有桥梁,进行技术改造。要进行技术改造,首先需要对全部桥梁进行技术状态检查,摸清
First, an overview of Yunnan Province, the basic transport by road transport. In particular, since the liberation, a large number of road bridges have been constructed, of which the bridge load levels built in the 1950s and early 1960s are steam -13 or less than steam -13. With the development of the national economy, the volume of transportation increases, the number of large-scale vehicles and heavy vehicles is gradually increasing, and many of the original design carrying capacity of bridges have not been able to meet the needs of traffic development. Besides, some bridges are not designed properly, and the construction quality is poor and other reasons make the bridges Accelerate the aging, disease development, seriously endangering the normal use. In order to maintain the traffic status quo and development needs, we should make use of existing bridges as much as possible to carry out technological transformation. To carry out technical transformation, we first need to check the technical status of all bridges and find out