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JLG (jieerjie) speed up and increase efficiency for China's high-speed railway construction

JLG (jieerjie) speed up and increase efficiency for China's high-speed railway construction

China Construction machinery information

on February 20, 2017, Shanghai - high-speed railway has achieved incredible rapid development since it was introduced into China during the "Eleventh Five Year Plan". In just a decade, from scratch, from manufacturing to creation, China's high-speed rail has become a synonym for "China's speed", and is regarded as a proud "super industry" by Chinese people. At the same time, the modernization construction level and construction concept of China's high-speed rail have stagnated, becoming a relatively weak link in the whole industrial chain. At the construction site of Liaoning section of high-speed railway in Northeast China, the large-scale application of aerial work platform in high-speed railway construction has begun to emerge, and China's high-speed railway construction is entering a new era of safety and efficiency

the upgrading of high-altitude operation mode and the application of large-scale

jlg's participation in the construction of Liaoning section high-speed railway project in Northeast China are an important part of Beijing Shenyang passenger dedicated line to reduce the cost of automobile manufacturing. The 684.3 km long Beijing Shenyang passenger dedicated line is an important part of the main framework of China's four horizontal and four vertical passenger dedicated lines, with an estimated total investment of 124.5 billion yuan, of which the construction period of Liaoning section is the most urgent. In the bid section of just over 20 kilometers, 648 high-strength piers need to be built, but the specified construction period has been shortened repeatedly. The detection between pile driving and beam erection has become the focus of reducing the construction period and improving efficiency

at that time, the piers on the construction site of Liaoning section high-speed railway project sprang up like mushrooms, and the supervisors from all over the country were working intensively on the construction site. One of the old engineers from Taiwan was very confused about the use of scaffolding in such a large-scale and urgent project, and refused to climb the scaffolding to work on the pier. The on-site construction personnel transferred truck cranes and installed cradles, which is the most "advanced" high-altitude operation method for high-speed railway construction in China's vast inland areas. Unexpectedly, the supervisor was even more angry, He said, "I'm not a cargo, why use a basket! Why don't you use an aerial work platform?" This sentence deeply touched Wang Gong, the chief engineer, who felt that the aerial work part of high-speed rail construction must be thoroughly adjusted

in fact, this matter is only a "primer" for China's high-speed rail construction to try to work at heights. As early as a few years ago, Wang Gong had seen the large-scale and efficient application of aerial work platforms in railway construction in Hong Kong, Singapore and other places, and made a preliminary investigation on the Chinese Mainland market. However, at that time, China's aerial work platform market was still in its infancy, and reliable brand dealers and lessors were very scarce. It was difficult to ensure the large-scale use of aerial work platforms in high-speed rail projects. Yielding was the inherent performance of materials

what Wang Gong didn't expect was that he soon found a high-altitude operation equipment leaseholder in Shenyang, a northern Chinese city that met all his needs - Shenyang Xuelong Machinery Equipment Co., Ltd. (hereinafter referred to as Xuelong machinery). As a leading enterprise in the leasing of aerial work equipment in Northeast China, Xuelong machinery focuses on high-end products, has a full range of products from JLG company, the world's first manufacturer of aerial work equipment, and has forged a reliable after-sales service team in many years of operation, accumulating rich construction experience. After the on-site investigation, Wang Gong soon reached a cooperation with Xuelong machinery and leased three JLG aerial work platforms. In July of that year, all equipment was stationed on the construction site, and China's high-speed railway construction ushered in the large-scale application of aerial work platforms for the first time

the picture shows JLG aerial work platform assisting the construction personnel in bridge erection at the high-speed railway construction site

improving work efficiency and reducing operation risks

engineers around the world have experienced a long way of exploration for the high-speed railway construction aerial work with high construction height, miscellaneous work content and tight construction period requirements. Among them, the mainstream construction methods include the erection of soft ladders, the erection of scaffolding and the installation of hanging baskets by cranes. Wang Gong analyzed the advantages and disadvantages of all construction methods for us, He said: "At first, we used a rope ladder, only a thin rope ladder attached to the high pier facade, and the staff needed to climb with their bare hands. I climbed the rope ladder more than 100 meters in those years. This way is very dangerous, and few workers today are willing to take this risk; later, we used scaffolding, although the safety has been improved, but it takes time and trouble to build and dismantle it. It takes at least 3 days to complete a pier, at the cost of manpower Today, this way is becoming more and more unsustainable; In recent years, truck cranes have been widely used for construction, and hanging baskets have been installed on the hooks to transport personnel, equipment and materials for the construction of high-capacity lithium-ion power battery projects with an annual output of 600million watt hours to the piers. This method seems modern and efficient, but it is actually a very nonstandard operation, because the crane is ultimately lifting goods, and the boom inevitably swings under the influence of operation and wind, making it difficult to ensure the safety of inspectors, Moreover, the crane is seriously restricted by working conditions, and the processes such as mechanical standing and outrigger opening also require a lot of time. "

the high-altitude operation of high-speed railway is concentrated after the pier construction, mainly responsible for the installation and testing of commissioning and calibration equipment, the transportation of commissioning and testing personnel, and the laying of PVC drainage pipes after the completion of beam erection. Taking a pier as an example, the construction personnel first need to take the detection wire and related equipment to the top of the pier by taking the aerial work platform, cast the link pile after placement, and then pull the line again for detection and calibration. Only by doing these things well, the girder erection machine can operate accurately and efficiently to ensure the safety of the high-speed railway line after completion

in case of super long-span bridges crossing highways and other facilities, precast beams cannot meet the length requirements of super long-span bridges, and the construction party needs to use all forces to cast and "sew" the bridges in the air. In this case, compared with the traditional construction method, the flexibility advantage of the aerial work platform is at a glance. The aerial work platform has a flexible telescopic boom, which makes it easy for operators to enter and exit the confined space that was difficult to go deep in the past. In addition, the aerial work platform has strong mobility, which can easily change the work location, and is suitable for multi-point aerial work with wide construction coverage

professional technical services, promote the application of high-speed rail

talking about the aerial work platform that has been working on the construction site for four months, chief engineer Wang Gong was full of praise: "the same set of work, the aerial work platform can be completed in just a few minutes, and the equipment is flexible and convenient, and it can shuttle between multiple piers, which is both safe and efficient." In the early stage of use, facing 648 High-speed Railway Piers ranging from meters, the equipment service personnel of Xuelong machinery specialty seamlessly connected with the experienced construction personnel of the high-speed railway construction project, and soon agreed on the construction scheme, and assisted the whole construction on site. Wang Gong was also impressed by the professional and responsible working method of Xuelong machinery

it is reported that four JLG aerial work platforms undertake all the work involving aerial work in the construction of the Liaoning section of the Beijing Shenyang passenger dedicated line high-speed railway project, assist in the whole process of construction, and effectively shorten the progress of the whole project. In the high-speed railway construction project, Chen Shengwei, the after-sales service Minister of Xuelong machinery, who assisted in the work on site, has more than ten years of experience in after-sales service on the site. He and his team should not only be responsible for the maintenance and on-site operation of the equipment, but also train the personnel of the construction party to ensure that the use of the aerial work platform can be smoothly connected with the special working conditions of the high-speed railway and give full play to its maximum effectiveness. He introduced to us: "aerial work platforms are widely used in the installation and construction of floors and plants, and high-speed rail is very different from these urban projects. The geographical location here is remote and the road conditions are complex. In the construction, we should not only consider the stability and accuracy of lifting and lowering, but also calculate the slope of the ground, the angle of expansion and contraction, and the rotation around the pier in advance." But for the application of aerial work platforms in the field of high-speed rail, Chen Shengwei was filled with emotion. He said, "high-speed rail is a technology that China is proud of. It is a great honor for us to apply aerial work platforms to high-speed rail and serve high-speed rail. I am very proud to stand at this busy construction site every time. In the future, aerial work platforms will certainly be applied to a wider range of fields and contribute more to the construction of the motherland."

from wait-and-see to introduction, from exploration to promotion, from point use to large-scale and all fields, the development track of aerial work equipment in China is as legendary as China's high-speed rail. At a time when high-speed rail technology is widely respected, it is also a time when high-altitude operation and careful placement of the piston platform, as well as the subsequent concept of safe construction, are deeply rooted in the hearts of the people. In the future construction, aerial work equipment will contribute more to the speed-up and efficiency increase of high-speed railway construction, and will bring profound changes in the concept of safety for China's engineering construction

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