CCCC develops and builds the world's largest and most advanced jack-up gravel paving leveler

The leveling of the immersed tube foundation is an indispensable key technology for the construction of submarine immersed tube tunnels, and the gravel leveling ship for laying pipe joints is its essential core equipment. As another super large-scale project after the Hong Kong, S.A.R., China-Zhuhai-Macau, S.A.R., China Bridge, the construction of the deep-medium channel immersed pipe is difficult, and there are problems such as ultra-wide, deep burying, back-silting, and poor stability of the sand pit, making it difficult for the original equipment in my country to meet the construction requirements. Need. Since the latter stage of the construction of the Hong Kong, S.A.R., China-Zhuhai-Macau, S.A.R., China Bridge, CCCC has begun to research and develop more advanced leveling equipment, and the "Yihang Jinping 2" came into being.

The ship integrates benchmark positioning, stone transportation, high-precision paving and leveling, quality inspection, and acceptance. It is the world's largest and most advanced jack-up gravel paving and leveling ship. The hull of the "Yihangjinping 2" is a box-shaped "back" structure, with a length of 98.7 meters, a width of 66.3 meters, a depth of 6.5 meters, a leg length of 75 meters, a depth of 6.5 meters, and a leg length of 95 meters. The maximum water depth for leveling operations is 95 meters, and the water depth for each paving ship is 98.3 meters.

To stand steadily on the seabed, "Yihang Jinping 2" relies on 4 single piles weighing 550 tons. The lifting frame of the load-bearing pile legs is the core component of "Yihang Jinping 2" and also restricts "Yihang Jinping 2". The core component of Jinping 2". The structure of the hanger is complex, the construction is difficult, and the manufacturing precision of various structural parts is millimeter-level. In order to ensure the welding quality, Zhenhua Heavy Industry has worked out a set of welding operating procedures after many tests, which saved nearly one-third of the time.

The design and construction of the ship are the core equipment of the super large-scale project of the deep-medium channel. The design and construction of the ship have been domestically produced, and the "big man" is equipped with pure "Chinese core".

Looking back at the development history of water delivery projects, the leveling of the rubble bed has always been a problem that plagued project builders. From the 1970s onwards, the first generation of frame-type underwater levelers began, from the first generation of bottom-level rock-throwing leveling boats suitable for water depths within 20 meters to the second generation of bottom-level rock-throwing leveling boats for the first time Realize the leveling of the foundation bed without diving, and then develop the first generation of frame-type underwater leveling machine in China, and realize the non-diving operation for the first time. "Yihang Jinping 2" is the fifth-generation core equipment in my country's gravel leveling field. Its many performances are at the international leading level, and it has achieved a major breakthrough in the field of gravel leveling.

Compared with my country's first jack-up platform type deep-water rock dumping leveler, "Yihang Jinping 2" has surpassed in terms of performance, specifications, and localization. The ship has a wide laying range. Without moving the hull, the gravel paving and leveling operation range of a single ship position reaches 2500 square meters, which is equivalent to 6 standard basketball courts. The leveling efficiency is higher and the leveling speed is faster. It can reach 5 meters per minute; the leveling speed is faster and the leveling efficiency is higher.