桥梁检查及病害分析（Bridge inspection and disease analysis）.docVIP

桥梁检查及病害分析（Bridge inspection and disease analysis） Common diseases and inspection of bridge site Abstract: the highway bridges in the six and 70s of last century are now mostly in the modern transportation. Therefore, it is very important to carry out the inspection of these bridges. Deck, superstructure, bearing, pier and foundation is an important part of disease examination. Key words: bridge disease inspection With the development of transportation, the increment of the traffic, traffic density and traffic load increases, especially the trailer transportation, container transport, cargo transport and other self-employed heavy vehicles increasing special engineering vehicles such as mine vehicles, large flat car also appeared from time to time. A considerable number of existing highway bridges, especially those of low grade loading bridges far from the age, are far from meeting the requirements for use. At present, Chinas highway mileage has reached 1 million 758 thousand km, km high-speed road mileage of 25 thousand and 800 kilometers, ranking second in the world, built a permanent bridge in more than 290 thousand seats, the bridge built before 1982 with about 136 thousand seats, mostly in 1972 before the ministerial standard construction. Most of them can not meet the requirements of current use and become the three or four type of bridge. For the three or four types of bridges, maintenance and reinforcement must be carried out. Otherwise, half of the new construction would be costly. In 80s, the United States estimated that 40% of the critically ill bridges were rebuilt at a cost of $300 billion, making it impossible. Therefore, it is necessary to strengthen the maintenance and maintenance of bridges and the reinforcement of bridges in danger, so as to make full use of them and prolong their service life, so as to meet the needs of the development of transportation. According to the experience accumulated at home and abroad, the funds needed for the reinforceme