Tracing death pit: Scientists enter

From the beginning of the rainy season to now, the roads in Ho Chi Minh City have appeared 42 'death holes'.

In this situation, a group of experts has been established to search for the cause and overcome the phenomenon.

According to Official Letter No. 5518 / UBND-DTMT dated 1.11, Ho Chi Minh City People's Committee has requested Ho Chi Minh City Association of Science and Technology Associations to set up an expert group to determine the exact cause of the death 'and propose measures to thoroughly handle this phenomenon.

A 'death pit' in HCMC.

Specialists in the game

According to the initial assessment, the authorities' determination of the cause of the last 42 ' death holes ' is due to: old water supply and drainage pipes being blown, broken, and broken; construction is not in accordance with the process and regulations; construction of breaking existing pipes; open electrical underground cables and not comply with signs. However, Mr. Ha Ngoc Truong, Vice Chairman of Hoi Cau - Road - HCMC Port said that in addition to the above reasons may be due to: Many underground works are no longer in use but management units do not cancel - pumping many underground works are no longer in use, but the management unit does not pump sand or grout into, causing subsidence, sealing mortar to cause subsidence; Long-term construction of road nails soaked in water for long-term destruction of structures; coordination between management agencies is not clear; and may be due to design errors.

' There have been many deaths in recent times due to the fact that the traffic inspector has not been serious, slow, ' said Assoc. Prof. Dr. Nguyen Ba Hoang , University of Transport, Ho Chi Minh City. HCM, said. According to Mr. Hoang, Đe to quickly identify the specific phenomenon of subsidence causing 'death hole', Ho Chi Minh City needs to establish a data center on traffic, underground works, flooded areas. due to rain, high tide. Meanwhile, Vu Duc Thang, an independent consultant, questioned: ' If you say these death holes are due to the weak ground, why does it not collapse a stretch of road, or a large area but There are only small holes like this , 'said Vu Duc Thang , an independent consultant.

Group of experts from Hoi Cau - Road - HCMC Port, established survey groups in the direction of: Geological and hydrological surveys; survey of underground works; turn over the design file, management unit and even rebuild the scene some death holes have been leveled up. Accompanying it will mark suspicious areas that may appear ' death hole '. Mr. Ha Hoc Truong, Team Leader explained: This is a group of independent experts who work and are responsible for their expertise, not subject to the direction and control of any department or branch. Within 45 days, the expert team will have to find out the exact cause of the " death holes" to submit to the City People's Committee for solutions and solutions.

Dr. Vu Van Bang and 'ground ray meter'.

Mobilizing equipment and machines to find 'death lodges'

Serving for the cause of the discovery of the ' death holes ', Director of Ba Ria Vung Tau Department of Science and Technology, Dr. Truong Thanh Cong, said that the department will bring a device to Ho Chi Minh City to help in This: He has just sent a dispatch to the HCM City People's Committee to bring the device to help find ' death hole '. This is a soil ray meter, a device made from a scientific research project funded by the Department of Science and Technology of Ba Ria Vung Tau province and has been tested and accepted at the end of May 2010. The equipment helped to find groundwater in Suoi Rao commune, Chau Duc district of the province, where people could not find groundwater before.

Dr. Vu Van Bang , the father of the ' ground ray meter' said: His detector detected what the naked eye could not see, or was obscured in the following areas: Electronics, construction , environment, geology . Therefore, he fully believed that the " earth ray meter " would find death holes in Ho Chi Minh City. His body, to search for ' death pit '. Just pull the machine on the road to scan and receive radiation signals. When detecting suspicious points, stop the machine and check. Just 15 minutes, the machine will measure the pit amplitude, depth, water or not . Dr. Bang affirmed: ' The early detection of death holes through this machine is within reach. If HCMC allows him to deploy immediately '. In particular, this is a device that he himself researched and collaborated with other units in the country to manufacture.

Another solution, Associate Professor, Dr. Ho Thanh Phong, Head of International University (Ho Chi Minh City National University) proposed to Ho Chi Minh City Department of Transportation, to receive the previous underground detector. but (currently stockpiled) about rewriting software to find ' death pit '. According to Associate Professor, Dr. Phong, it takes a month to rewrite the software. However, MS Tran Van Su, Head of the Department of Electronics and Telecommunications (International University), who will directly deploy, said: The school is still not receiving the device, so it is hard to say, this machine can be useful. in the search for ' death hole ' .