Reinventing the world's engineering miracle Sany Heavy Industry escorts more than 60 equipment to escort the Hong Kong-Zhuhai-Macao Bridge

At 10:30 a.m. on June 29, with the completion of the hoisting of the steel box girder and the acceptance of relevant test data, the main bridge of the Hong Kong-Zhuhai-Macao Bridge was successfully closed. The seven-year bridge project is expected to be opened to traffic by the end of next year.

The Hong Kong-Zhuhai-Macao Bridge is a super-large cross-sea passage connecting Hong Kong, Zhuhai and Macao, and after its opening to traffic, it will realize the land docking between Zhuhai, Macao and Hong Kong for the first time, greatly shortening the distance between Hong Kong, Zhuhai and Macao. The bridge integrates bridges, islands and tunnels, with a total length of 55 kilometers, which is the world's longest sea-crossing bridge, and also has the world's longest immersed tube undersea tunnel, which is a sea-crossing bridge with a long mileage, a lot of investment and a construction difficulty of 5655 in the history of China's construction.

In the construction of the main project of the bridge and island tunnel with technical difficulties, Sany Heavy Industry provides technically stable equipment and quality service to escort the whole process, and there are nearly 60 concrete machinery and equipment participating in the construction alone, and the other Sany'sPile Mechanics, lifting machinery also participated in the construction.

Go all out to participate in the construction of China's first bridge-island-tunnel cluster project

The construction of the Hong Kong-Zhuhai-Macao Bridge has a special feature, the bridge line crosses the Lingdingyang sea, and this is an important trade route in the world, and there are special height and load requirements for the bridge.

Considering the general aviation demand and the aviation height limit requirements of surrounding airports, the Hong Kong-Zhuhai-Macao Bridge proposes a precedent construction plan, that is, the bridge-island-tunnel cluster scheme. The main project of the bridge-island-tunnel cluster is about 29.6 kilometers long, including about 6.7 kilometers of immersed tube tunnels and 22.9 kilometers of sea-crossing bridges, as well as artificial islands in the sea built to realize the conversion of bridges and tunnels, which is the part of the construction of the bridge *5655 and technical difficulty*5661.

The island tunnel project is a control problem for the bridge. CCCC Port and Navigation Bureau undertook the construction of the island construction consortium project, which includes a large immersed tube tunnel, two deep-sea artificial islands, and Sany provided 12 trailer pumps, 12 distribution rods, 10 mixer trucks and 1 mixing plant to participate in the construction.

In addition, in the Zhuhai connection line project undertaken by the 18th Bureau of China Railway, Sany provided 22 sets of equipment and 2 180 production lines to participate in the construction, which were very 'obedient' and not 'awkward', which saved the construction party a lot of worry.

Solve the problems of the *5653 project and make great contributions

The construction of a 6.7-kilometer-long submarine immersed tube tunnel is an engineering problem of *5653, and it is also the longest and deepest immersed tube tunnel in the world, with more than 400 new patents. According to the on-site users, the basic principle of construction is to pour concrete into pipe joints and install them to the seabed in sequence, connecting long pipes. In the process of pouring the immersed tube tunnel, Sany equipment has made "great contributions", generally pouring for more than 40 hours, and it is 2-3 days to dry, and the equipment has stably poured excellent quality pipelines.

In the process of artificial island formation, the contractor proposed the rapid island formation technology of deep-inserted steel cylinders for the first time in the world, using 120 giant steel cylinders directly fixed on the seabed and inserted into the seabed, and then filling the middle to form an artificial island. In such an innovative solution, Sany Equipment assists customers to overcome technical problems one after another. *In the end, the construction party realized "the start of construction in the same year, the island in the same year", creating a miracle of world engineering.

Special service dares to call the moat to change the way

The construction of the Hong Kong-Zhuhai-Macao Bridge started in 2009 and lasted for seven years. Sany equipment has also entered the site one after another with the start of the main body of the project. The endless sea surface, strong sea breeze, sticky and humid air, and difficult construction plans all test the performance of Sany equipment and the skills of Sany service engineers.

During the concrete pouring construction of the immersed tube tunnel, Wu Zhuojie, a special service engineer of Sany, always accompanied Sany equipment. Since it generally takes 30-40 hours for formwork forming, he does not dare to close his eyes, always pay attention to the construction of the equipment, and do not let go of details such as oil pressure and oil temperature to ensure the normal operation of the equipment.

Whenever drowsiness strikes, Wu Zhuojie either slaps his face or clears his mind with cold water. His serious and responsible attitude is seen by both the construction party and the customer: "With him, we can rest assured." ”

It is in such a "daunting" place that a group of Sany service engineers, who are known for their "good at fighting tough battles and daring to fight tough battles", have written the heroism of "daring to make the moat change the way" with hard sweat.