Not long ago, the Hong Kong-Zhuhai-Macao Bridge was officially opened to traffic, the Guangdong-Hong Kong-Macao Greater Bay Area entered the "bridge era". As the first batch of large-scale foreign central enterprises to enter Shenzhen, China Construction Second Engineering Bureau accompanied the growth of the special zone and successively built Landmark buildings such as Diwang Building, SEG Plaza, Shenzhen Civic Center are also involved in the construction of Tencent's new global headquarters - Tencent Binhai Building , and the country's largest prefabricated affordable housing - Shenzhen Changzhen Public Housing.
Recently, the 35th stop of the large-scale themed communication campaign of China Construction Engineering Corporation Open Day, "40 Years of Construction Certification·China's Construction Miracle Journey" was held: Entering the "Big Mac" of the port - Hengqin Port project. The staff of
organized media reporters to visit the Hengqin Port project exhibition hall. On the project viewing platform, the staff explained in detail the construction process of this "big Mac" port and felt the charm of "smart construction".
"This is the largest single infrastructure project currently under construction in Zhuhai after the Hong Kong-Zhuhai-Macao Bridge." The person in charge of China Construction Second Engineering Bureau told reporters that the contract value of the Hengqin Port Project is approximately 16.8 billion yuan, with a total construction area of 16.8 billion yuan. With an area of 1.31 million square meters, it is responsible for the important mission of building the largest land-based port directly connected to Macao. In December 2016, the Hengqin Port project officially started construction. It is striving to put the customs clearance function into use on the occasion of the 20th anniversary of Macao's return to China. It is expected to be fully completed by the end of 2022.
It is reported that Hengqin Port will also explore the "two places, one inspection" customs clearance model. As a demonstration project to explore a new model of cooperation between Zhuhai and Macao under "one country, two systems", the Hengqin Port project is to promote the development of Zhuhai and the west bank of the Pearl River Estuary, and promote Guangdong, Hong Kong and Macao. A new platform for in-depth cooperation. In accordance with the requirements of the "Hengqin Master Development Plan" approved by the State Council, the project will be built into a first-class domestic port with "innovative models, convenient customs clearance, and complete facilities." "The main infrastructure for innovative policies will serve as an important platform to promote the innovation of Guangdong and Macao port inspection systems and mechanisms in the future and explore innovative customs clearance models such as "two places, one inspection".
The current customs clearance volume of the old Hengqin Port is 70,000 passengers and 10,000 vehicles per day. After the completion of the new Hengqin Port, it will meet the annual customs clearance volume of 80 million passengers, 2.65 million vehicles and 2.65 million goods. With a volume of 5.33 million tons, it has truly become a large-scale national first-class port.
What has been the biggest challenge the builders have encountered since construction started in 2016? The person in charge told reporters that the challenge lies in the construction of 6,500 pile foundations in the customs clearance area. As the largest pile foundation project under construction in China, the port customs clearance area has three major characteristics: "large", "dense" and "long".. Among them, the foundation pit construction area is about 135,000 square meters, which is equivalent to the size of 19 standard football fields. The 6,500 pile foundations to be driven into the ground are all ultra-long pile foundations, with an average length of more than 100 meters and a maximum length of 120 meters. , and the distance between pile foundations is 4 meters, which can be said to be both long and dense.
"Because the project is close to the sea, the geological conditions in the construction area are very poor, and it is extremely difficult to form pile holes. To this end, the project department uses high-frequency resonance-free hammers to lower the ultra-long casing and strictly controls the proportion of mud to overcome the problem. It overcomes the complex geology and various difficulties in the construction of ultra-long piles, and solves the major problem of difficulty in forming holes for pile foundations. This 20-meter-long casing is like a "golden bell", which can be used for excavation, steel cage hoisting, and The concrete pouring was all carried out inside the "Golden Bell", which is both safe and efficient. "
After 180 days of hard work day and night, the builders took half a year to complete the construction task of pile foundation in the customs clearance area 15 days in advance, successfully completing this task. Milestone node. Currently, the project department is intensively carrying out basement construction in the customs clearance area.
[Reporter] Dai Xiaoxiao
[Author] Dai Xiaoxiao
[Source] Southern Newspaper Media Group Southern + Client
