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Written by: Wang Jieen
2021-03-07 12:43
Last update date: 2021-03-07 12:43
The Civil Engineering and Development Department’s "Cave Cave Master Plan" released at the end of 2017 listed a total of 48 cave areas in Hong Kong suitable for development. The government is also promoting the move of 6 government facilities into caves, including the Sha Tin Sewage Treatment Plant.
The Secretary for Development, Wong Wai-lun, published a blog today (7th) stating that the Drainage Services Department is starting to relocate the factory building of the Sha Tin Sewage Treatment Plant at the mouth of the Shing Mun River to the cave on the opposite side of the Nv Po Mountain Cave at A Kung Kok.
He described the relocation plan as the largest cavern development project in Hong Kong.
The Drainage Services Department has started to relocate the factory building of the Sha Tin Sewage Treatment Plant at the mouth of the Shing Mun River to the cave on the opposite side of the Nv Po Mountain in A Kung Kok.
(Photo of Development Bureau)
Wong Wai Lun pointed out that the current Sha Tin Sewage Treatment Plant covers an area of 28 hectares and treats approximately 250,000 cubic meters of sewage per day. It is the largest secondary sewage treatment plant in Hong Kong.
After the relocation, the land at the factory site can be freed up for other development.
He pointed out that the new Sha Tin Cave Sewage Treatment Plant occupies an area of 14 hectares, which is 15 times larger than the Stanley Sewage Treatment Plant, which is also located in the cave, and will be the largest of its kind in Hong Kong.
The new plant will introduce advanced sewage treatment technology. Even if it occupies a small area, the sewage treatment capacity is similar to that of the existing plant, which can meet the needs of the population in the area.
Expected to be completed in 2022 as scheduled
Gao Mingyuan, a geotechnical engineer from the Drainage Services Department, said that the relocation plan will be implemented in three stages.
The first phase of the project mainly includes the development of the site at the entrance of the cavern and the construction of the main connecting tunnel; the second phase is the construction of the main cavern and the upstream sewage collection system; the remaining works mainly include the construction of sewage treatment facilities in the new cavern and the demolition of the existing sandfield sewage Treatment plant.
He pointed out that the first phase of the project has started in February 2019, and the excavation and blasting of the main connecting tunnel is currently in progress. The current progress is in line with expectations and is expected to be completed in 2022 as scheduled.
The engineering team built a temporary flyover across A Kung Kok Street to facilitate the entry and exit of construction vehicles and reduce the pressure on nearby traffic caused by the project.
(Photo of Development Bureau)
Use new technology
In addition, the engineering team applied a number of new technologies, such as building information simulation technology (BIM), "design for manufacturing and assembly" (DfMA), etc., to assist in the construction of temporary flyovers so that construction vehicles do not need to drive through A Kung Kok Street Entering and exiting the construction site reduces the pressure on the nearby traffic caused by the project, and reduces the lifting and assembly work at night from the original 6 nights to 2 nights.
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Wong Wai Lun, Development Bureau
