The main structure of Notre-Dame cathedral (巴黎圣母院) — including the two bell towers — has been saved after firefighters worked through the night to put out the big fire.
Now that it has been put out, experts have been able to explain the difficulties fire crews faced as they fought to save such a large, historic building.
A complex flammable (易燃的) roof?
It’s not yet known exactly how the Notre-Dame fire began, but it appears to have started near the top, eventually spreading across the rest of the wooden roof.
Gregg Favre, former commander at St Louis Fire Department in the US, pointed out how flammable the building is. He explained on Twitter: “Let’s pause to remember how fires actually burn. It involves key elements like fuel, oxygen, heat and a chemical chain reaction.” Unfortunately, none of these elements are easy to remove in this case.
“To start with, removing the fuel is a no go. Churches have no shortage of things to burn. Although a huge oak beam(梁) is generally difficult to get burning, as smaller timbers (木材) fuel the fire and the temperature rises, the timbers will eventually ignite (点燃) in a phenomenon known as a flashover.”
“The heat that a fire this size is putting off is terrific. Little options for interrupting that. The chemical chain is off to the races.”
“That leaves the oxygen. Unsurprisingly, even if the roof had not burnt off, churches are nearly impossible to control ventilation (通风) in. Their design is to be open and airy. Great for Sunday worship, terrible for managing fire spread.”
Dumping water from above?
As the fire burned, US President Donald Trump suggested that flying water tankers (罐车) could be brought in to fight the flames from above.
Professor Rein, the head of Imperial College London’s fire-studying Hazelab said“ Trump wasn’t the first person to come up with the suggestion, however, it was not a good idea because it would have damaged the structure of the cathedral, collapsing the walls”.
The force of water coming from an air tanker is strong and no-one has been trained to use one in a city. He added that Monday’s fire was “not the time to test this”.
How safe can they make Notre-Dame?
Professor Rein says that “fire engineering” will need to be considered when reconstructing the cathedral. Fire engineering is now in place in modern landmarks such as the Shard in London.
“We keep seeing these buildings go up in flames like this. However, it’s relatively easy to prevent. Notre-Dame should install sprinklers (消防喷淋).” he said.
Much as the Notre-Dame fire is a tragedy, information from studying it will be priceless in protecting other buildings.
| Background | Despite difficulties, firefighters | |
Elements | The roof is made up of flammable wood, so Heat and chemical chain are also hard to get | |
Dumping water from above doesn’t make | The strong force of water would have put the structure of the cathedral at | |
| Conclusion | Fire engineering should be considered in the protection of heritage sites in an effort to avoid | |
注意：每个空格只填1个单词。请将答案写在答题卷上相应题号的横线上。
A total of 604 people injured in a chemical plant explosion on March 21 in Xiangshui, Jiangsu Province were still receiving medical care in nearby medical facilities, including 19 in critical condition and 98 seriously wounded. The fire quickly spread to 16 neighboring enterprises, with the latest death toll at 64.
At the same time, rescuers were busy inspecting chemical plants damaged in the explosion for possible poisonous substance leaks. Since the explosion, six rounds of search and rescue missions have been launched, and the search area has been expanded from 1.1 square kilometers to 2 sq km. More than 4,500 medical workers and 116 ambulances have so far participated in rescue work. The National Health Commission sent 16 leading experts to treat the injured. As of the noon of March 24, victims were being treated in 16 hospitals. Specialized treatment plans had been made for every patient. Psychologists have also been sent to help the recovery of the patients, their relatives and rescuers. Workers have been sent to comfort the families of the killed. The bodies will be treated according to ethnic and religious customs where applicable.
Sang Shulou, 36, discharged from the hospital after receiving treatment, with signs of obvious injury on his face, said that he was blessed to have survived the explosion that happened just 100 meters away from him. “I was driving a car passing the explosion site when the car was pushed away fiercely by the wave,” he said.
More than 1,600 homes near the explosion site have been repaired. Owners of homes beyond repair will receive compensation and assistance in moving to new homes.
The State Council, China’s Cabinet, has set up a special investigation group to look into the explosion. The investigation would be thorough. It also severely criticized the local government and the company involved for their not learning lessons from previous environmental violations and failing to make effective corrections, Official records show that the concerned company had been punished several times before for taking advantage of safety loopholes and violating environmental protection regulations. Chenjiagang Chemical Park also experienced several similar safety accidents over the past few years.
| Outline | Information about a chemical plant explosion |
| Introduction | On March 21, a chemical plant |
| Rescue work | ※ Potential poisonous stuff release was being inspected. ※ Search area has been expanded. ※ For the treatment of the injured, sixteen experts from The National Health Commission were ※ Patients have also received ※ Comfort is provided for the families of the killed, whose bodies will be treated, (75) ※ Damaged houses have been mended. Those, whose houses are beyond repair, will be assisted and (76) |
| A (77) | Sang Shulou, released from hospital, expressed he was in luck to weather the disaster, in which his car shook due to a fierce explosion wave. |
| Investigation | ※ The accident will be (78) ※ Local government and the involved company has received severe criticism for (79) ※ Chenjiagang Chemical Park underwent considerable safety accidents alike. |
