"This is another historical monument for the development of the construction machinery industry." on October 25, Su Zimeng, President of China Construction Machinery Industry Association, commented on the offline ceremony of the world's largest up slewing tower crane held at Zoomlion Changde tower crane intelligent factory.
This w12000-450 tower crane has a dead weight of 4000 tons, a rated lifting moment of 12000 tons and meters, a maximum lifting weight of 450 tons and a maximum lifting height of 400 meters, which is equivalent to lifting 300 cars to the height of 130 floors at one time.
Previously, XCMG's offline excavator XCMG xe7000e, known as "the first excavation in China", is 23.5 meters long, 9.09 meters wide and 9.44 meters high. Each shovel can excavate 50 tons of coal, with a self weight of 660 tons, heavier than 500 cars combined.
Shield machine is a necessary weapon for many super projects. On November 1, the largest diameter earth pressure balance shield machine "Jinxiu" jointly built by China railway construction heavy industry and China Railway 14th bureau began to rotate in front of Chengdu Zigong high-speed railway station, with an excavation diameter of 12.79m.
Construction machinery is becoming huge, and behind it is the strong market demand generated by one super project in the world, especially in China.
Zoomlion's 10000 ton meter tower crane bridge, thermal power, wind power, hydropower and nuclear power are developing towards large-scale in each field
Tang Shaofang, vice president of Zoomlion and general manager of Zoomlion construction hoisting machinery Co., Ltd. (hereinafter referred to as "Zoomlion construction"), said that bridges, thermal power, wind power, hydropower, super high-rise buildings and large venues are developing in large scale in each field. The bridge is getting higher and higher, and the tower column height is now close to 400 meters; In the past, thermal power of 30 MW and 60 MW were large, but now they have reached the level of 100 MW.
W12000-450 is a tower crane specially built by Zoomlion for the construction of Changtai Yangtze River Bridge, the world's largest span highway railway dual-purpose cable-stayed bridge. Later, it will participate in the construction of Anhui Chaoma Yangtze River Bridge, the world's largest span three tower cable-stayed bridge.
Shi Zhiyong, deputy general manager and chief engineer of CCCC Second Navigation Engineering Bureau Co., Ltd., introduced that the development of bridges in China has presented new characteristics in recent years. First, the bridge span has been increasing, the design span of suspension bridge has reached 2300m, and the maximum span of highway and railway cable-stayed bridge is close to 1200m; Second, with the continuous breakthrough of bridge span, the height of the main tower of the bridge has also set a new record. The lower tower of Changtai Yangtze River Bridge is a reinforced concrete structure, with a height of 352m, which is the tallest tower in the world. The lifting weight of the steel tower section of the upper tower column reaches 200t, and the lifting width is 34.3m; The lifting weight of the upper tower of Chaoma Yangtze River Bridge reaches 380t and the lifting width is 26m. The existing lifting equipment can not meet the requirements. Therefore, the company customized the super tower (w12000-450) to Zoomlion.
Like Changtai Yangtze River Bridge and Chaoma Yangtze River Bridge, in China, every super project is a shocking behemoth. For example, Baihetan Hydropower Station on Jinsha River is the largest hydropower station under construction in the world. The barrage is a concrete double curvature arch dam with a height of 289m; The length of the spillway tunnel alone is more than 2000 meters, and the maximum section can be 15 meters wide and 18 meters high.
These super projects involve many links such as engineering design, major equipment manufacturing and construction. They all put forward new requirements for heavy equipment, and also show the supporting force of a complete domestic industrial chain.
The Hong Kong Zhuhai Macao Bridge is praised as one of the "seven wonders of the modern world" by foreign media. Its construction process has created a series of the world's longest immersed subsea tunnel, the world's largest cross-section highway tunnel and the world's largest immersed pipe prefabrication plant. It is the world's longest sea crossing bridge and the most complex technology and the most difficult construction in the world's construction history The largest bridge.
In addition to using a series of engineering machinery and equipment such as tower cranes, concrete pumps, truck cranes, aerial work vehicles and loaders, the Hong Kong Zhuhai Macao Bridge also gave birth to the world's largest crane ship - "Zhenhua 30" crane ship developed by Zhenhua heavy industry (600320. SH), with a length of more than 297m, a displacement of nearly 250000 tons, a lifting capacity of 12000 tons and a total weight of about 140000 tons, More than all the active aircraft carriers in the world, it is the largest crane ship in the world.
In addition, two days after the above-mentioned offline ceremony of the world's largest upper turret crane, on the morning of October 27, China's independent third-generation nuclear power "Hualong 1" built the first unit in batch - the inner dome of Zhangzhou nuclear power unit 1 of China Nuclear Power Group, which was successfully hoisted, and Zoomlion's 3200 ton crawler crane hoisted the 500 ton dome on the containment steel lining. Previously, the crawler crane (commonly known as crawler crane) successfully completed dome hoisting at Jiangsu Tianwan nuclear power plant and Shandong Shidaowan nuclear power plant.
The size of the fan is also getting larger and larger. On September 1, the offshore wind power blade broke through 100 meters for the first time, reaching 102 meters long. A few days later, the models of two projects of CGN new energy Yunnan base set a new record for the volume of onshore fans in China: the single unit capacity reached 6.7mw, and the impeller diameter exceeded 191m, which means that the blade length is also close to 100m.
Fan Youtian, general manager of Tianjin lanchao special hoisting engineering Co., Ltd. under China energy construction, introduced that in the future, the single unit capacity of onshore fans will tend to be large, China's wind energy resources reserves will be huge, and the technical exploitable capacity of 140 meters and above on land will exceed 5.1 billion kW. The development of large offshore units will increase the demand for heavy machinery and equipment.
The inner dome of Zhangzhou nuclear power unit 1 of China Nuclear Power Group was successfully hoisted, and Zoomlion's 3200 ton crawler crane hoisted the 500 ton dome on the containment steel lining. China's "super equipment" accelerates to sea
Su Zimeng pointed out that in recent years, infrastructure construction has shown a diversified and large-scale trend. The majority of enterprises have successively overcome many technical difficulties, achieved breakthrough results, and developed a large number of high-end construction machinery products. In particular, the development of major technical equipment has advanced by leaps and bounds. A series of super equipment developed by a number of backbone enterprises have solved world-class construction problems, demonstrated the strength and charm of made in China under extreme working conditions, and demonstrated the manufacturing level and ability of China's construction machinery.
A noteworthy trend is that China's "super equipment" is accelerating to sea.
On August 25, XCMG group said that during the construction of an ethylene project in Russia, XCMG 2000 ton crawler crane installed the quench tower with a total weight of 1500 tons, a height of 80.61 meters and a diameter of 13 meters in place in only 9 hours, "so that the world can witness the hard core quality and strength of 'made in China' again".
On September 16, Zoomlion zcc3200 crawler crane was shipped to Turkey, breaking the record of China's largest tonnage crane exported overseas. Nearly 100 trucks were used to transport this equipment.
According to customs data, the export value of China's construction machinery from January to June 2021 was US $15.071 billion, a year-on-year increase of 54.9%.
Construction site of fast base of 500m aperture spherical radio telescope of "China Tianyan"
The cost of a single unit is 100 million yuan. Under the trend of large-scale, the industry accelerates the reshuffle
In Tang Shaofang's view, with the annual increase of China's super projects and the obvious trend of heavy-duty, the requirements for construction machinery and equipment are becoming higher and higher, which is changing the development pattern of the whole construction machinery industry. This is particularly prominent in the tower crane industry. At present, the tower crane industry has entered the "big tower era".
Fan Youtian believes that whether it is w12000-450 tower crane or Zoomlion's windiest electric arm tower crane in the world, these equipment provide strong technical equipment support for the modular construction of China's high-rise and super high-rise buildings, airport hubs, exhibition halls, theatres, water conservancy and hydropower and other large buildings, greatly reducing the construction cost.
Tang Shaofang said that an overseas construction party told him that the investment scale of today's large-scale projects is always billions or even tens of billions of yuan, and the costs from equipment, materials to labor are transparent and can't make money. In this context, the construction can only be profitable by managing the construction period. The shorter the construction period, the lower the cost. In particular, reducing the financial cost depends on improving the construction efficiency, which can be achieved by large equipment.
In addition, in the field of bridge construction, Shi Zhiyong believes that bridge construction will be more industrialized in the future. With the continuous breakthrough of bridge span, the height of bridge main tower will also set a new record at the same time, and the rapid installation of main tower by large tower crane has gradually become the mainstream trend.
Industrialization means that prefabricated parts (PC components) are growing rapidly, and their weight and volume are increasing rapidly, which is more obvious in the prefabricated construction market.
According to the report of the Ministry of housing and urban rural development on the development of prefabricated buildings in 2019, the market space of PC components continues to expand, with a compound growth rate of 38% from 2019 to 2025.
Yue Zhiguo, deputy general manager of Southwest leasing company of China Construction Second Engineering Bureau, said that with the rise of prefabricated buildings, small tower cranes have been phased out. Since 2018, the share of small tower cranes of 40tm ~ 63tm series has decreased greatly, while the share of large tower cranes has doubled; Since 2020, the share of large and super large tower cranes has further increased. In 2021, the sales of Zoomlion's large tower cranes of 600tm and above has increased by more than 100%, and the development trend of large-scale equipment is obvious.
Manufacturers naturally welcome this trend. Tang Shaofang revealed that Zoomlion had a strong performance in the first three quarters of this year, and completed sales of 10 billion yuan in six months. This figure took nine months last year and 12 months the year before last. "The cost of w12000-450 is 100 million yuan. If there are 100 units in the future, it is 10 billion yuan."
In the construction machinery industry, the larger the equipment, the higher the technical difficulty. Super large excavator was once regarded as the "crown" of construction machinery. It was monopolized by overseas giants for many years. It was not until recent years that it was gradually broken through by domestic manufacturers. Super large shield machine has attracted much attention from the state. One of the reasons is that it is difficult in technology and was once stuck.
No matter what kind of "Big Mac" equipment, manufacturing them has far exceeded the capacity of small and medium-sized enterprises in the industry, and the trend of giant equipment means that the industry reshuffle is intensified. Zoomlion said that in the tower crane industry, the sales scale built by Zoomlion exceeded the sum of the other top ten manufacturers.
Tang Shaofang predicted that with the advent of the big tower era, the tower crane industry will also accelerate the reshuffle, and the industry will concentrate on advanced production capacity.
