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一、前言桥梁在发展交通基础设施中占有重要的地位,随着我国经济逐年连续增长,车辆流量的迅速增加,对桥梁的要求趋向是大跨度、高净空、宽桥面和重荷载、快车速、大通过量等。其中大跨度尤其是桥梁高科技发展的主要标志。华南沿海及珠江三角洲是广东经济发展最活跃的地区,但珠江三角洲又是水网地带,河流水道纵横交错;而沿海地区大小岛屿星罗棋布,跨越江河、海峡的桥梁是进一步发
I. Introduction Bridges occupy an important position in the development of transportation infrastructure. As China’s economy continues to grow year by year with the rapid increase of vehicle traffic, the requirements of bridges tend to be large-span, high clearance, wide deck and heavy loads, fast speeds , Such as large volume. One of the major span of high-tech bridges in particular the main symbol of development. The coastal areas of South China and the Pearl River Delta are the most economically developed areas in Guangdong. However, the Pearl River Delta is a water network with criss-crossing rivers and lakes. The islands of large and small coastal areas are dotted with bridges across rivers and the Strait,