Earthquake in a school survey of Shame -----secondary source of tragedy

by:傅剑锋

School of War: Expert finds that the Ministry of Construction-secondary source of the problem is the building - the collapse of secondary-source tragedy investigation

Author:
Southern Weekend reporter Fujian Feng Yao Yi Jiangfrom Chengdu, Sichuan2008-05-29
08:12:31Source:Nanfang Zhoumo

the Ministry of Construction experts said frankly: "so many dead children, our functional departments, our planners, architects and structural engineers should reflect on."




"Poly secondary source in the siting, construction of structures, building structure, construction and materials is certainly a problem."Earthquake relief members of the Group Ministry of Construction, Tongji University Professor Chen Bao-sheng in the investigation of the ruins of post-secondary source Nanfang Zhoumo told reporters.




Public opinion on the multi-source to the schools to the representative of the quality of the teaching building collapsed questioning, and finally the first time experts have official authority of the clearly identified.




Poly secondary sources have two school buildings in the May 12 earthquake in Wenchuan instant meltdown, 278 teachers and students dead and 11 missing. Premier Wen Jiabao this sad tears, bowing three times to the victims of Zhiai.




But Poly secondary source of the surrounding buildings did not collapse, only to become serious only dilapidated buildings. This makes it difficult to accept the parents. "Why just inverted the school, indicating the collapse of the secondary-source not only the problem of natural disasters,"said Zhao Deqin. Her twin daughters killed in the secondary-source, the 40-year-old mother has been like this haggard old woman.




Ruins the scene, some of the cement Canzhuan free Qiaodiao, prefabricated panels in the drawing fine. This in. come to rescue the country's earthquake rescue team members Nanyi angrily: "All is concrete, wire, is not a steel!"




Not just secondary-source, the heavy casualties Dujiangyan new primary schools have a similar situation. Semi-building new primary schools in the earthquake in the teaching building collapse, 239 people dead teachers and students. But in the teaching building behind the collapse, the same year the building was safe and sound Chengguan kindergarten, even the walls are very few cracks. New primary schools built in some outlying the 1980s, the old floor, not down, 100 metres from the new primary schools as far as the North Street Primary School is only part of the wall damage.




New primary school in the ruins at the scene, Southern Weekend reporter saw that some of the broken concrete block, steel and even without a wire!




A similar situation also occurred in Mindanao Dujiangyan to the secondary. When the earthquake occurred, to the Mindanao secondary school buildings collapsed quickly in a very short time, only 420 students out of a few dozen. Yang therefore Juehou-family, two grandchildren Liang Yang, Yang Branch, the nephew of two Pan Li, Li Yang Yun are here. Yang Qing share the view that the Mindanao schools vulnerable to the project quality has led to such heavy casualties.




In this earthquake, the collapse of the school buildings are in Sichuan Province North-secondary schools, primary schools Maoba, Maoba level, secondary-source, the new primary schools, secondary schools to Mindanao dam, Ping-town primary school, secondary school I Xuan, Yingxiuwan primary, East steam secondary schools, primary schools is the ancient town, Ying-hua town of primary and secondary schools, primary 1.80 town, the town of Luoshui primary, primary red, East Lake, primary, secondary Muyu, Han Wang Zhen a secondary school a technical school, red and white schools, the red White primary, Mianzhu County, the new two-and small. As of this month on the 14th, the education sector to incomplete statistics, school buildings collapsed 6898 (Wenchuan, the North-figures not included). Southern Weekend reporter on the collapse of several schools and students to the latest figures the death toll in Sichuan Province to the director of the Information Office Hou Xiongfei asked, the answers are yes, the new data is in the statistics.




Faced with this tragedy, the Ministry of Construction experts Chen Bao-sheng said frankly: "so many dead children, our functional departments, our planners, architects and structural engineers should reflect on."




Specific to secondary-source, in his view, first of all, is siting. Poly is the source of secondary school buildings to the north and south, and roughly parallel fault zone, seismic waves easy it razed to the ground. The same structure, the floor is something to experiment with vertical seismic zone, although damaged, but did not collapse.




He also maintained that the source of secondary schools-block quality problems. Qualified block, there should be four millimeters in diameter prestressed reinforced. This block, the following tension, compression above, it is like Rubber Band, will bend but not break, a seismic effect. But now, like the block "a few people with pull-out drawing things, did not consider loading, layers of the pressure will inevitably lead to the collapse."




Chen Bao-sheng also measured by the collapse of the teaching building in the steel column, the diameter of 1.2 cm. He reinforced the view that small side, not the normal requirements.




He noted that the secondary-source teaching building in building construction, is in line with the structure, poor seismic performance. Steel guitar and did not pull tendons, and, in connection with the wall did not pull guitar tendons. An experienced earthquakes, walls and columns of Rafah guitar, beam, hold the length of the plate, plate and pull between the end boards, etc. would be severely damaged. "Therefore, in the strong earthquake, the collapse of the housing is a normal, Caiguai not collapse."Chen Bao-sheng sigh.

the lack of educational input

original link:http://blog.sina.com.cn/s/blog_4776545401009qyf.html