High-end intelligent equipment creates a "weapon for offshore construction" and CCCC polishes its brand name as a major power and heavy equipment

"Yihangjin Pile" - "Green Giant Ship" for offshore construction

In March 2024, CCCC The 140-meter-class piling ship "Yihang Jin Zhuang" independently invested and developed by the First Harbor Engineering Company laid the world's longest span three-tower steel box girder cable-stayed bridge in the second phase of the Ningbo Liuheng Highway Bridge - the west approach bridge of the Qinglongmen Bridge 12 Pier number "the first one of the year" quickly attracted widespread attention.

The "Yihangjin Pile" is 124 meters long, 39 meters wide, 8 meters deep, and 142 meters high. It is the highest pile frame height and the highest pile hoisting capacity in the world so far. Qiang is the special piling ship with the longest piling length and the largest pile diameter. It is also the first ultra-large piling ship in China equipped with full-rotation rudder propeller, side thrust assist and ship dynamic positioning system.

Unlike diesel piling hammers, "Yihangjin Pile" is equipped with an 800 kilojoule hydraulic piling hammer, which can adjust piling energy according to construction conditions. The construction area of ​​the project is close to the Blue Spotted Mackerel National Germplasm Resource Reserve. As the weather gets warmer, a large number of Blue Spotted Mackerel migrate to produce seeds, and the sea area has entered the highest level of protection period. The project team systematically organized the steel pile parameters and flexibly adjusted the impact energy to avoid high-energy shock waves affecting the survival and reproduction of fish. In addition, as the world's first fully electric-controlled piling ship, "Yihangjin Pile" is also equipped with a power management system. "We can automatically adjust the generator operation according to the ship's working conditions, reduce energy consumption and exhaust emissions, overcome the shortcomings of high energy consumption of traditional piling ships directly driven by diesel engines, and are more intelligent and environmentally friendly.”Relevant personnel of the company introduced.

　"Zhenhua 30" wheel - lifting "Hercules"

"Zhenhua 30" wheel Participated in the hoisting work of the first and second phase booster stations of the Qingzhou Offshore Wind Farm in Yangjiang, Guangdong, which was constructed by Longyuan Zhenhua, a joint venture of Zhenhua Heavy Industry.

The safety, stability and efficiency of the hoisting process are a test for floating cranes. According to reports, the Qingzhou offshore wind farm is the first deep-sea project undertaken by Longyuan Zhenhua. The farthest construction point is 70 kilometers away from the coastline, the deepest construction sea area is more than 50 meters, and the sea conditions are complex. To hoist the booster station within the limited window period of 7 days, all factors such as weather, typhoons, surges, and securing must be taken into consideration in advance.

Entering the typhoon season, once a large surge occurs, the construction team must evacuate quickly and wait for the next window period. In view of the maritime meteorological conditions, the "Zhenhua 30" ship project department and Longyuan Zhenhua studied and analyzed the "typhoon" data of the same period in history in advance, customized more refined forecast services based on meteorological reports in fixed-point sea areas, determined the operation window period, and made Develop a good emergency plan and refine the construction node plan from 2 hours to less than half an hour.

The total weight of Qingzhou Phase I and Phase II offshore booster stations is 6,450 tons, making it the largest single booster station in China and the heaviest booster station in Asia. As the world's largest single-arm full-turn crane ship, the "Zhenhua 30" has a single-arm fixed lifting capacity of 12,000 tons and a 7,000-ton 360-degree full-turn lifting capacity. It is the only floating ship in China suitable for this operation. crane ship. After comprehensive consideration, the project team decided to adopt the "fixed + secured" hoisting working condition, making full use of the lifting advantages of the "Zhenhua 30" wheel to ensure efficient completion of the operation.

"Fourth Navigation Yongxing" - "Transformers" for both river and sea purposes

January 2024, The waters of Dongzao Port in Nantong, Jiangsu Province are shrouded in fog. The "Fourth Navigation Yongxing", a cutting-edge "marine weapon", is carrying about 20,000 tons of weight and arriving at the construction sea area under the tugboat. From CCCC Fourth Harbor Engineering Co., Ltd.The "Sihang Yongxing", which is mainly developed and built by the main body, is the world's largest wide, flat and shallow-draft semi-submersible barge. It has introduced my country's latest equipment technology and green and environmentally friendly construction concepts. It has a large cargo capacity, a high degree of intelligence, and ballast regulation. Core advantages include strong capabilities and high cargo versatility. The "Sihang Yongxing" ushered in its first "big test" after delivery, undertaking the construction tasks of Jiangsu Dajin Heavy Industry Hengtong's 1,600-ton offshore wind power installation platform ro-ro barge and launching operations.

The platform involved in this construction task is 135 meters long and 50 meters wide. The self-launching weight of the platform reaches 19,500 tons. It is currently the largest single wind power platform in China with the largest launch weight. To move an installation platform of this size up and down into the sea, the project team felt the task was arduous.

The "Sihang Yongxing" uses an intelligent load adjustment system to change the water carrying capacity of its own cabin and adjust the ship's posture to achieve the purpose of floating up and down. However, when the "Sihang Yongxing" arrived at the dive site, it was affected by factors such as local currents and rainfall, and it was difficult to adjust the ballast water according to the planned plan and achieve precise dives. Based on the on-site sea conditions and the characteristics of the hull itself and its technical advantages, the ship and engine team decided to use manual load adjustment and intelligent load adjustment system to adjust the ballast water. The team accurately calculated the water flow rate, water carrying capacity and other relevant data of the ship's dive, determined the dive rate and depth, and finally ensured that the "Fifth Hang Yongxing" accurately dived to a water depth of 19 meters, and used the semi-submersible cargo transfer winch and platform With the cooperation of winch assistance and tugboat, the wind power installation platform was successfully raised and floated, which not only shortened the original plan of 10 hours of diving and refloating time to 7 hours, but also effectively avoided risks that may result from long-term operations.

The success of the first operation of the "Fourth Navigation Yongxing" fully tested the ship's construction operation capabilities, affirmed the working ability of the "big country's important equipment" management and operation team in the new era, and marked The "Sihang Yongxing" has mastered a complete set of technologies for large-scale platform roll-on and roll-off launching and submersible and undocking, laying a solid foundation for contracting various types of offshore launching, transportation and installation in the future, and opening up the deep-sea large-scale wind power installation platform transportation market.