Ouweimu construction world first railway bridge show China manufacturing strength
The autumn October, the harvest season. Europe's large special projects, the main span of the world's main rail bridge, the first third Strait of Bosporus bridge in Turkey, under the arduous cultivation of bridge builders, is progressing smoothly, and will officially open to traffic in October. Liuzhou ouweimu machinery Limited by Share Ltd (hereinafter referred to as the OVM) full of Chinese manufacturing strength, actively involved, and create an international bridge cable industry product standards high, enterprises in the internationalization of the road has taken a solid step forward.
Turkey Strait of Bosporus third bridge, referred to as the BB3 project, which is a cable-stayed suspension rail cum bridge, eight motor vehicle lanes, two lane railway bridge, 58.4 meters wide, a total length of 2164 meters, the main span of 1408 meters, the main span in the world not only with two rail bridge in the first place, and the world ranked eighth in suspension bridge. The construction of the bridge caused great concern in the international community, attracted a number of international first-class team to participate in the construction of bridge experts and experts: United States, Japan and Turkey, South Korea, Italy and other countries to participate, including the Chinese ovm.
The BB3 bridge adopts the cable-stayed suspension cooperative system, which can greatly increase the aerodynamic stability of the long-span bridge. The main tower near the bridge deck is mainly supported by stay cables. The middle part of the deck is mainly supported by suspension system, which greatly improves the overall stiffness of the bridge and is conducive to the dynamic stability of the bridge structure. The bridge uses 68 PWS type hangers, with a total of 7-109 to 7-367 seven specifications, and the steel wire strength is 1770MPa. The upper end is connected by the cast steel fork and the pin shaft of the cable clip, and the lower end is the tensile end. The cable lug weight more than 2 tons, is the world's most known bridge cable lug weight, tension anchor cup more than 1.4 meters in length, the total weight of nearly 143 tons. This critical 68 hanger has a great challenge to the two design and production requirements of the product. Finally, for the "OVM" brand trust, project owners of this difficult problem by Chinese Liuzhou ouweimu machinery Limited by Share Ltd to complete.
Research and develop new subjects and practice strict standards
In February 10th, China traditional festival Spring Festival Lunar New Year's day, the technical team BB3 project ouweimu party chief, director of the Institute of Hua Jianping cable is not with the happy family reunion together, because he has been a focus in reply from South Korea modern company listed tricky technical problems, to eliminate the differences and find common position. Until nearly five thousand words Chinese business reply sent to the partner's mailbox, he was an under the heart to feel the festive atmosphere of the Spring Festival Chinese. This is not unusual in the course of the whole project, in every project group. Because there are differences between China and the European and American technology standards, the technical debate is always accompanied by project promotion. Discussions are common, such as the design of rubber waterproof cover, locator, test cable manufacture, etc. At the beginning of each other, often repeated advice, but in the end the patient through ouweimu answer and excellent detection results, eventually resolve their doubts.
The BB3 project is the technical specification of OVM company bear the requirements of project one of the highest. Undertaking this project means accepting harsh European and American technical standards in the bridge industry: the quality of hangers must meet the CIP standard, and the quality of cable parts must meet the European and American standards. The hangers of BB3 bridge are designed according to the European design specification and determine the technical specifications, such as the 200MPa stress of the standard CIP, the fatigue resistance of the 2 million cycle, the corrosion resistance grade C5-M and the water tightness test of CIP and so on. To accomplish this challenging project, ouweimu technical team completed a total of 12 research project, 9 product design guide. Such as: super long and large anchor head perfusion, large deflection locator sling R & D, material of anchorage cable, study on low temperature toughness of high precision, high precision of finished cable diameter manufacturing process research.
To meet the difficulties and to ensure fine engineering
The OVM world class project attaches great importance to the general manager, Liu Xuan served as the project team, at the same time as the emergency leading group leader TFT. He said: "I know that this project is very strict, but decided to take on this project since ouweimu people, you must take this project as a project to do fine. For the future of the international market, ouweimu must pull this off."
Ouweimu project team, on schedule every day regular project meeting, timely decision. In accordance with the needs of progress, a multiparty meeting containing foreign supervision is held. During the project, from the quality of raw materials, OVM and round steel factory technicians jointly research, finally according to the requirements of technical agreement delivery, to the large forging shipped to Liuzhou after further heat treatment and finishing, to ouweimu technical experts through continuous testing, to overcome the technical problems of low temperature toughness of forging, put some finishing parts and then sent to Guangzhou for galvanizing, surface treatment and manufacturing according to European standard testing, ouweimu project team are always strict in demands, excellence.
The project requires that all important forgings must be coded in order to trace their raw materials, forgings, and heat treatment batches. All samples, products, inspection personnel and agencies must have European standard qualification, and carry out activities according to the European standard process, and produce test reports that meet European standards. Managers and workers who are involved in the manufacturing process say that the BB3 project is the most stringent project they have ever done.
Forging pin, anchor cup and nut, is a key part of the contract, long production cycle, high technical requirements, is the front part of the forging manufacturing, ouweimu project team members, and ICA attaches great importance to the modern. According to the requirements of the BB3 project, the foreign supervision must witness all sample sampling and important processing procedures. The foreign supervision is mainly from Korea modern and Turkey ICA company. The bridge involves safety problems, not to be a little bit careless. For this reason, the three parties of the eastern and Western cultures and beliefs were concentrated in a forged factory in Guangzhou and worked together for 3 months. 7-9 months is just a hot season in the south. Everyone overcame the high temperature, often to the hot forging, heat treatment site, monitoring every important manufacturing link.
Project technical standards, project team ouweimu fast learning and interpretation of the European standard specification, a short span of 3 months, completed a total of English MS (manufacturing method statement) 27 documents, ITP (test plan) 5 documents. Project engineer, in the manufacturing process of the management personnel and workers, translators, during the entire project is completed, regardless of day and night.
Liu Xuan general manager said BB3's harsh requirements for equipment and components have made our business progress faster.
Test cable at
The manufacture and test of the test cable are the most important part of the design and supervision. The test cable is the same as the size of the product delivered and manufactured in accordance with the process flow of the product. Its quality represents the quality of the delivered product. The good news came from the United States in August 2016 encouraging CTL laboratory: all test ouweimu supplied cable locator, combined fatigue test method standard CIP requirements through the static load test, the cable lasted for 3 months, sign the contract products to meet the requirements of design specifications, test the finished cable OVM to pass rate of 100% all over, ouweimu BB3 project success. The BB3 project can be called ouweimu internationalization another milepost, is also a new name card of internationalization.
The whole process of the project construction, ouweimu people the courage to challenge the limits, break the normal procedure, and achieved great success. The manufacturing strength of the Chinese prestress industry has been verified again by the world's major projects.
