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1、此文档是毕业设计外文翻译成品（ 含英文原文+中文翻译），无需调整复杂的格式！下载之后直接可用，方便快捷！本文价格不贵,也就几十块钱！一辈子也就一次的事！外文标题：Construction monitoring of prestressed concrete continuous beambridge外文作者：Congqi Li , Wenjie Ge ,Dafu Cao and Biyuan Wang 文献出处: Advanced Materials Research Vols. 919-921 (2018) pp 308-312 (如觉得年份太老，可改为近2年，毕竟很多毕业生都这样做)英文2
2、163单词，14602字符(字符就是印刷符)，中文3188汉字。（如果字数多了，可自行删减，大多数学校都是要求选取外文的一部分内容进行翻译的。）Construction monitoring of prestressed concrete continuous beam bridgeKeywords: prestressed concrete; continuous beam bridge; construction monitoring.Abstract: The creep of concrete structure has a prodigious effect on bridge al
3、ignments and the stress control during the bridge construction. In the meantime, the problems such as pre-stress losses, bearing asymmetry sink ,the concrete box-beam deflection, box-beam web cracks, structure stress redistributing and so on, which make the bridge structure lose functions or even in
4、valid early when it works. For these reasons, the construction monitor of the deformation and the long-term deflection of long-span bridges with high piers have important practical significance. Construction monitoring of prestressed concrete continuous beam bridge - new Tongyang canal bridge which
5、adopt cantilever construction work is made.IntroductionsIn recent 30 years, one notable achievement in civil engineering sector is the formation of the prestressed concrete bridges section construction and the development of section construction technology. They are widely accepted by engineering al
6、l over the world 1-7.Section construction of bridge structure began in the cantilever construction methods, the cantilever construction method can generally be divided into two forms: cantilever casting construction and cantilever erection construction. Cantilever casting is symmetrical on both side
7、s of the pier piecewise-place pouring, tensioned prestressed reinforced when the concrete has reached a certain intensity, moving machine model (hanging basket) continue cantilever construction. Cantilever erection is use the crane symmetrical lifting prefabricated component, installed on both sides
8、 of the pier. Then tensioned prestressed reinforcement, the cantilever will extend continuously until closed.With the rapid development of transportation and the science and technology in our country, the development of passenger dedicated line has also been put on the agenda. Such as Wuhan - Guangz
9、hou passenger and Beijing - Shanghai high speed railway, which are all in full swing. Large span prestressed concrete bridge of passenger dedicated line and Beijing-Shanghai high speed railway are currently widely used cantilever casting construction methods. But there are still some problems: The a
10、daptability between post creep deformation and non-ballasted track high speed driving in the large span prestressed concrete continuous beam of passenger dedicated line. Clearly defined in our specification, camber value of prestressed concrete creep should be strictly limited. After the track build
11、, camber value of ballasted track bridge beam creep is 20mm, while ballast less track bridge girder is 10mm. It is undoubtedly suitable for small span simply supported girder bridge, but for a larger span prestressed concrete continuous bridge is difficult to control. How much the limits, has always
12、 been a problem concerned by the design engineer. The value of large span prestressed concrete continuous beam post creep deformation has an important influence on the structure size, prestressed cable arrangement, material selection of concrete, construction loading age. The research about effect o
13、f creep deformation on the large span continuous beam bridge will play a significantly guiding role for the design and construction of similar structure 8-12.1Test situationThe new Tongyan canal-bridge is a canal bridge project across the territory in Huji, which is a reconstruction project of natio
14、nal highway NO.204 in Haian route segment QL1 construction tenders. In this paper, deflection, temperature and strain of the bridge in construction engineering have been tested, which is based on the practical engineering.2Deflection Test2.1Deflection Test MethodPrecision level measurements were use
15、d for the deflection of cantilever box girder observation. Leveling the observation points periodically, which are pre-buried in each cantilever construction segment box beams. Carry out elevation observation for each beam segment before and after pouring.2.2Establishment of box girder constructions
16、 height measurement network Fig.1 Layout of elevation control points and measuring points(1)The surveying control network based on the pier cap construction services for cantilever casting construction of prestressed concrete box girder, transfer control point on the cap to top surface of each pier 0 # segment according to the construction schedule.(2)The horizontal control network is composed of left and right bridge axi
