Shenzhen landslide site still has disaster risk radar monitoring all day waiting
On the afternoon of the 25th, it was learned from the ninth press conference of Shenzhen landslide accident that there is still a small amount of unstable landslide risk at the rescue site. At the same time, there are two types and three types of hazardous chemicals that need to be detected and disposed on site.
Most of the excavators in Shenzhen are concentrated in the rescue scene
At the press conference, Shenzhen Municipal Bureau of Housing and Urban Development Yang Shengjun introduced that compared with the previous days, the current engineering rescue has increased more engineering technicians and more mechanical equipment, and also transferred road boxes from Foshan and other cities in the province. The moisture content of the soil that slides down from the mountains is relatively high. When the large machinery goes up, it is easy to get stuck. The dump truck can't move forward. The roadbed box is to solve this problem. 'Yang Shengjun said that the night before, other cities in Guangzhou, Zhuhai and other cities transferred a batch of bulldozers, excavators and loaders overnight to support the Shenzhen rescue. At present, the vast majority of excavators in Shenzhen have been concentrated in the rescue area of ​​the Guangming New District.
Yang Shengjun said that in order to prevent the occurrence of secondary disasters, the mountain has been monitored for 24 hours to reduce the risk of mountain instability. Arranging technical forces to conduct an expert assessment of the stability of the mountain again and found that there are still a few unstable landslides in three places on the mountains, and mechanical removal is being organized. At the same time, an early-warning mechanism has been established. Once the mountain continues to decline, there will be a set of signals to organize the rescue personnel at the scene to evacuate at the first time.
During the rescue, Shenzhen showered from time to time and the site was muddy. Yang Shengjun said that according to the meteorological department's weather forecast, the rescue site also made waterproof and drainage measures to prevent the occurrence of secondary disasters.
Hazardous chemical storage locations have been marked
Li Jiannan, director of Shenzhen Guangming New District Safety Supervision Bureau, informed the press conference that after the landslide accident, Shenzhen and district safety supervision departments immediately activated hazardous chemicals in the affected area to prevent secondary hazards of hazardous chemicals. In the investigation, there are no hazardous chemicals production, storage, or operation companies within the affected area, and only ten hazardous chemical use companies are involved.
With the further advancement of on-site rescue, some of the buildings that have been buried have been exposed on the ground. Once the hazardous chemicals used by the company are re-inspected, it is found that there are no explosives and highly toxic chemicals on the site. There are second types of dangerous chemicals, including oxygen and nitrogen. , Carbon dioxide, argon, acetylene and the third category of hazardous chemicals are flammable liquids, including gasoline, white oil, water, alcohol, cleaning agents, thinners, paints. According to the verification, the storage location of hazardous chemicals has been marked, and the technical requirements for the site construction unit have been carried out.
In terms of the disposal of hazardous chemicals, the first is to strengthen the monitoring of buildings and areas where hazardous chemicals may exist. Through radar, manual detection methods, etc., the specific location of hazardous chemicals can be ascertained, and construction can be conducted with caution to ensure construction safety. The second is to identify areas where hazardous chemicals are present. Before the construction work, experts are arranged to monitor environmental changes at the site, explain rescue safety matters to rescue workers, and arrange fire-fighting personnel to perform monitoring and emergency handling. Third, hazardous chemicals excavated are first identified by hazard experts, then processed by professional agencies and promptly transported away. 'He said.
Li Jiannan also stated that after the accident, the Shenzhen Environmental Protection Team and the Dangerous Chemical Rescue Team conducted follow-up monitoring of hazardous chemicals. As of now, no excessive standards, water pollution, and air pollution have been found.
Rescue
East and West Corridor opens up 'life channel' to improve rescue efficiency
At 21:00 on the 24th at the scene of the landslide disaster, a two-kilometre-long “life channel†across the east-west direction has been opened. The deputy chief of the 4th detachment of the Second People’s Armed Police Hydroelectric Power Plant, Ou Jianguang, introduced that the opened “life channel†was in the north and south of the disaster relief site. In the middle, the east-west direction runs through the road. After this 'life channel' is opened, materials and equipment can be passed quickly, saving handling time.
Radar monitoring to ensure the safety of rescue workers
At noon yesterday, Xin Express reporter came to the scene of the rescue site. Dr. Ma from the China Academy of Safety Production Sciences is currently responsible for monitoring construction safety. According to Dr. Ma, the most convenient factor for the entire excavation project is the earth and stone near the breach. Just above the breach, there are two high slopes with a height of about 60 meters. In the event of heavy rainfall, there is a high probability of another landslide.
In order to ensure the safety of these workers, the Chinese Academy of Safe Production has deployed a self-developed synthetic aperture slope radar in China. This radar has a measurement accuracy of millimeters and a width of two kilometers. It has provided great help to prevent landslides and ensure the safety of operators. Radar monitoring will continue with the rescue process and be monitored 24 hours a day.
Further news about the landslide accident is still being investigated. Of course, more people are looking forward to the announcement of good news.
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