Tropical cyclones "Lion Rock" and "Compasses" hit Hong Kong successively this month, and fatal accidents occurred during Broadwood Road in Happy Valley.
The Secretary for Development, Wong Wai Lun, wrote an article in the "Secretary's Essay" today (24), introducing the "Po Shan Drainage Tunnel", one of Hong Kong's most iconic landslide prevention projects. The tunnel was completed in 2009 and uses innovative technology to control groundwater. To reduce the risk of large-scale landslides and avoid the recurrence of the tragedy of landslides that killed 67 lives in the 1970s.
The Geotechnical Engineering Office has also set up a "Landslip Science and Technology Exhibition Hall" in the tunnel, and opened an appointment guided tour service to increase the public's knowledge and stay alert to the risks of landslides.
▼October 9th Tropical Cyclone Lion Rock No. 8 Typhoon Citizens Chasing the Wind▼
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The "Po Shan Drainage Tunnel" is one of Hong Kong's most iconic landslide prevention and control projects.
(Picture of "Secretary's Notes" by Development Bureau)
Wong Wai Lun pointed out that every heavy rain, the risk of landslides will increase. In 1972, a catastrophic landslide occurred on Po Shan Road in Mid-Levels, destroying many buildings, including a 12-story Asahi Building, and taking 67 away. Articles of life.
The Geotechnical Engineering Office of the Civil Engineering and Development Department subsequently carried out a series of prevention and control projects in the Po Shan area. Among them, the “Po Shan Drainage Tunnel” completed in 2009 used innovative technology to control the groundwater level, replacing the aging and aging installation in the 1980s. Horizontal drainage pipes reduce the risk of large-scale landslides.
"Po Shan Drainage Tunnel" set up real-time groundwater monitoring system
According to Ye Jingtong, a trainee geotechnical engineer of the Geotechnical Engineering Office, the "Baoshan Drainage Tunnel" consists of two drainage tunnels (3.5 meters in diameter and 500 meters in total length), and engineers used "upward drilling hammers" to lay the narrow tunnels. It is composed of 172 inclined drainage pipes (up to 100 meters in length); it is also equipped with an automatic real-time groundwater monitoring system.
During heavy rains, when the local water level rises to a higher level, the system will alert colleagues with a text message, and will automatically switch the water switch to control the groundwater level within the specified range, thereby improving the stability of the hillside and reducing the occurrence of large-scale landslides Risks to protect the safety of citizens.
A sloping drainage pipe was laid above the "Po Shan Drainage Tunnel". A group of students from Yinghua College visited the site earlier.
(Picture of "Secretary's Notes" by Development Bureau)
Ye Jingtong said that, in addition to the "up-punch hammer" technology used in Hong Kong for the first time, engineers specially introduced retractable tunnel boring machines when digging two drainage tunnels.
When the boring machine finishes digging a tunnel, it can be retracted to its original position, and then another tunnel is drilled, eliminating the need to dig a shaft at the end of the tunnel to retrieve the boring machine.
The application of this innovative technology has shortened the tunneling time to four months and greatly reduced the environmental impact of the project.
Landslide Science and Technology Exhibition Hall hosts guided tours
The Geotechnical Engineering Office has set up a "Landslip Technology Exhibition Hall" in the tunnel and held guided tours to convey the importance of slope safety to the public.
There are a number of exhibition galleries with different themes in the museum. Among them, the "Po Shan Disaster Memorial Gallery" displays historical pictures and records of the Po Shan Road landslide accident that year, reminding citizens of the pain and lessons brought by the landslide disaster; "Climate Change Impression Gallery" explains the importance of global warming that has caused extreme rainstorms to become more frequent, and the importance of continuous efforts to ensure slope safety under extreme weather.
The Geotechnical Engineering Office held a guided tour of the "Landslip Science and Technology Exhibition Hall" earlier. At that time, the Director of Civil Engineering and Development (currently the Permanent Secretary for Development (Works)) Liu Junjie (first from right) visited science and technology with students from Yinghua College Various facilities of the exhibition hall.
(Picture of "Secretary's Notes" by Development Bureau)
Feng Yifan, Assistant Geotechnical Engineer of the Geotechnical Engineering Office, pointed out that in order to enhance the fun of guided tours, many STEM Education and interactive elements have been added to the museum, such as the "Landslide Knowledge Gallery", which will take everyone through a short film. Recalling the history of Hong Kong’s landslides in the past 100 years, the development of Hong Kong’s slope safety system, etc.; and the "Drainage Tunnel Experience Gallery" through the application of "Augmented Reality" (Augmented Reality-AR) to demonstrate the operation and Introduce the innovative technology of the groundwater level control system.
The picture shows the Landslip Knowledge Gallery, which looks back on the history of Hong Kong's landslides over the past century and the development of Hong Kong's slope safety system.
The "Landslide Science and Technology Exhibition Hall" is now open for public appointments.
(Picture of "Secretary's Notes" by Development Bureau)
The "Landslide Science and Technology Exhibition Hall" is now open to the public, schools or groups to make appointments for guided tours, and reservations can be made on the Hong Kong Slope Safety website of the Geotechnical Engineering Office.
Huang Weilun pointed out that climate change brings extreme weather and makes the prevention and control of landslides more challenging.
As the Director of the Geotechnical Engineering Office Dr. Zhang Weiwen said, we hope that through the guided tour, the younger generation can learn about the history of landslides in Hong Kong, so that they can be alert to the risks of landslides, and at the same time let the public understand how colleagues are actively using technology To manage the risk of landslides.
He also mentioned that people should stay away from slopes during heavy rains or landslide warnings. Owners are also responsible for regular maintenance of private slopes or retaining walls to prevent problems.
▼On the morning of October 13th, Xinghua Village turned over the waves ▼
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