Statistical Analysis and Research on Common Defects of Precast Slab Girder Bridge

Abstract

maintenance and reinforcement Abstract: In this paper, small and medium span precast hollow slab girder bridge in Dongguan city is taken as an example in order to statistically classify common defects of precast slab girder bridge respectively from aspects of bridge decking, upper structure and lower structure. Moreover, possible causes and disposal measures are analyzed from perspectives of operation and maintenance. Basic technical data are provided for research on precast slab girder bridge in terms of regular inspection, maintenance and reinforcement, and formulating conservation measures etc. Dongguan, also known as Guancheng, is located in east coast of Pearl River Estuary, south of Province, China. It is head of Four Tigers of Guangdong and is referred to as the Industrial Workshop of World. With strong manufacturing and complete industrial system, Dongguan, whose manufacturing output accounts for more than 90% of above-scale industrial output value, is one of world's largest manufacturing bases. Dongguan features a mainly export-oriented economy. Especially in industry, most of capital, raw materials and product sales are not separated from international market, which means road traffic in Dongguan city plays a vital role in urban development. Meanwhile, healthy operation of bridge (especially small and medium span bridge) is a guarantee of smooth traffic. Thus, it is strategically significant and has a far-reaching impact on Dongguan's advancement to research and analyze typical defects of small and medium span bridge, to grasp degree of typical defects' damage to bridge structure, and to master technology and security of bridge structure.