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Written by: Wang Jieen
2020-12-06 11:51
Last update date: 2020-12-06 11:51
The Tung Chung expansion plan covers both the east and west sides of the existing Tung Chung New Town, and 130 hectares of land is being reclaimed near the coast of Tung Chung East. The reclamation project has commenced at the end of December 2017.
The Secretary for Development, Wong Wai-lun, published a blog today (6th), stating that the entire reclamation project was about half completed and reiterating that the Tung Chung East Reclamation is the first public works project to apply "deep cement mixing".
He said that compared with the traditional method of dredging reclamation, it can reduce the impact on the nearby water quality and marine ecology. He also pointed out that the waste materials that were originally to be discarded will be used as reclamation materials for recycling. The final material is about 70% of the filling material. "Inert construction waste", the rest is machine-made sand.
The blue circle in the picture is the first housing site in Tung Chung East that was reclaimed from the sea.
(Photo of Development Bureau)
Wong Wai-lun reiterated in his blog that the reclamation project is mainly carried out in Tung Chung East. 130 hectares of land, or about 6 Victoria Parks, is to be completed. The reclamation project is expected to be completed in 2023, and the first land obtained by reclamation has been In March this year, the housing department was handed over to the Housing Department to build about 10,000 public housing units.
The Development Bureau stated that the "deep cement mixing method" is to inject the cement from the engineering ship into the sea mud layer by "mixing".
Each engineering ship can carry 480 tons of cement.
(Photo of Development Bureau)
Wong Wai Lun, the first
public engineering project to apply "deep cement mixing",
said that Tung Chung East Reclamation is the first public engineering project to apply "deep cement mixing". It is a non-dredging method, that is, the seabed silt is not removed. Method to reclaim land from the sea.
Zhang Jiande, a senior geotechnical engineer at the Sustainable Lantau Office, also pointed out in his blog that, in contrast to the traditional method of dredging for reclamation, the "deep cement mixing method" does not involve the removal and removal of sea mud, which can reduce the generation of suspended particles in the water. Effectively reduce the impact on the nearby water quality and marine ecology; coupled with the need for marine transportation of dumping sea mud, it helps reduce carbon emissions.
He pointed out that the Tung Chung East project can reduce the dumping of 4.4 million cubic meters of silt and reduce the number of marine transportation by 17,600 vessels.
The Development Bureau stated that in order to ensure that the project will not have an impact on the environment, the yellow silt barrier in the picture completely surrounds the 130-hectare site to prevent particles from floating out of the reclamation area.
(Photo of Development Bureau)
70% of the filling material will be construction waste.
Wong Wai Lun also said that in the reclamation project in Tung Chung East, the "inert construction waste" generated by the construction project will be used as the reclamation material to convert the waste that was originally to be disposed of into land resources.
He explained that "inert construction waste" refers to construction and demolition materials, such as concrete, asphalt, crushed stone, etc., generated from excavation and demolition in construction projects, collectively referred to as public fill.
He continued that at present, the entire reclamation project is about half completed. In terms of filler composition, sixty percent are inert construction waste and the remaining four are machine-made sand.
He estimated that when the project is completed, about 70% of the filler will be "inert construction waste" and the rest will be machine-made sand.
The Tung Chung expansion plan covers the east and west sides of the existing Tung Chung new town.
The picture shows the concept map of the expansion area of Tung Chung East New Town.
(Photo of Development Bureau)
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