专业文献翻译题 目： Talking about Chinas concrete simple bridgeconstruction technology anddevelopment 系： 建 筑 工 程 学 院 专业： 土 木 工 程 班级：学生姓名： 导师姓名： 完成日期： Talking about Chinas concrete simple bridge construction technology and developmentWith the advances in technology, the original concrete simple bridge has been the method of classification does not reflect advances in technology, for the sake of it may wish to support in-situ into law, the entire hole and the erection of mobile die-law category. This paper on the concrete simple bridge of the construction method at the introduction and conclusion, the construction programme with a view to the formulation and implementation of the guiding role. 1 stent in-situ law Stent in-situ means that the law under the beam Erection stent to support the template of reinforced concrete pouring and other working load, the last bridge with the construction method. Although the stent is a temporary structure construction, but it affects body mass and beam construction safety, must be taken seriously. General should note the following issues: (1) sufficient strength, rigidity and stability. Support must be reliably withstand the construction process may have in the various loads, and the load type and size of the estimate is the key, according to construction specifications and construction experience to be confirmed; stent to be based on reliable, based on the results of the stent, for the most Adverse conditions on the basis of design, and the foundation to carry out the necessary treatment; temporary structure in the component connection is to ensure that the key to overall stability, we must ensure that the connection point of security, and have enough vertical, horizontal, ramps connecting rod Pieces and prevent the emergence of the overall failure or partial failure. Generally speaking, the strength of support more easily be guaranteed, but with the stability often overlooked. The reason is that the structure of the stability of the more difficult to calculate, but with the emergence of large-scale commercial software, the problem was gradually resolved more important for the stent, when there is no absolute grasp on stability, simulation analysis should be conducted. (2) determine the elevation model legislation. Most bridges have a design in the pre-camber (Chang said the design of pre-arch), and will support a variety of loads in the role of deformation and therefore have to consider the impact that the stent deformation Oxfam The pre-camber. During the construction, must be calculated pre-construction and design of the arch-arch, to determine the correct elevation model legislation, thus guarantee a bridge to meet the design and specifications of the line. To obtain a more precise construction Pre-camber, if necessary, to support pre-pressure testing, to determine the support of non-elastic deformation and elastic deformation values, to validate construction in the calculation of the various parameters. (3)-dumping equipment. To set up the in-situ stent-disposal equipment, should be charged-symmetrical, uniform, the main beam to prevent a partial stress. The past with equipment commonly used for dumping sand wedge and extinguishers, and Jack now use standard equipment with dedicated equipment. Although the structure did not support the number of changes, but the equipment used by the stent than the last great changes have taken place. Now commonly used standard equipment fight stent group, such as steel pipe bowl button up scaffolding, universal members, Bailey beam, June 4 military-beam, entry steel truss girder, August 7-steel girder, 6 August 3 and 5 Tun Tun, and so on, all construction units according to their actual situation in which the use of one or more of the fight stent group. Using standard equipment group fight stent, the construction speed, high-intensity support, good stability, and a A better economic performance. Construction of the bridge in the city, the bridge generally is not high, so use a large bowl button up pipe scaffolding, to use its adjustable entrusted with the elevation of adjustment and hold-off is very convenient in a Traffic flow, the use of beam support and military pier with a certain clearance. Support cast-in-place method, the key is to fight stent group, should give full consideration to load and strengthen structural connections, a detailed analysis to ensure construction safety and quality. 2-erection of the entire law Whole-building method is used factory-prefabricated beam, beam will be transported to the bridge site and install in place of the way. Such methods in the erection of the main truck crane, gantry crane erected across the bridge, bridge-building species. When the water underneath and relative