Red net time, July 28 (reporter Yang Yan, correspondent Yan Yubin) as the hardest hit area of the rainstorm disaster in Henan, after many days, there is still a large amount of water in the subway station of line 5. If the water is not drained out in time, it will seriously affect the follow-up rescue and post disaster reconstruction. On July 26, after receiving the instruction from the Fire Rescue Bureau of the emergency management department and the request of the subway company, 41 fire commanders and fighters from Xiangxi, Hengyang Changde and Changsha rushed to Metro Line 5, line 2, line 6 and line 14 to urgently carry out waterlogging drainage.
The subway station has serious ponding
Drainage site of line 5
At the Zhengzhou people’s Hospital Station of line 5, the underground environment is humid and the water pipeline is complex. The fire rescue personnel of Hengyang detachment use strong lights to move forward in the dark.
The drainage point is located on the negative second floor of the subway. The internal electrical appliances, pipelines and facilities are complex. It is difficult to lay the drainage pipeline, poor communication and narrow working space. According to the site conditions, the detachment drainage formation will replace the large flow pump with the high lift pump, use the exhaust pipe to lay the cable vertically, extend the water belt 40m downward to the drainage point on the second floor of the subway, and connect the water pump at the drainage point for drainage.
Since 2 a.m. on July 27, five drainage lines and five groups of high lift pumps have been started at the same time with full load, and the displacement of each water pipe is 100 cubic meters per hour. During this period, all fire commanders and fighters stayed at the scene, fought day and night, and carried out waterlogging drainage and equipment inspection in turn. At present, the drainage operation is still in order.
At the beach Temple Station of Metro No. 5, where the Xiangxi detachment is located, the water accumulated in the two stations of the subway station tunnel is up to 500 meters, and the maximum water depth is about 5 meters. It is difficult to operate. The rescue workers use the enclosure to store water, pump water laterally into the reservoir, and finally pump water vertically. From 1:00 on July 27 to 10:00 on July 28, the Xiangxi detachment drained 7400 cubic meters, and the drainage work of the current working point has been completed.
Drainage site of Salmonella station of Zhengzhou Metro Line 2
As of 18:00 on the 28th, the tunnel drainage of Salmonella subway station has reached 26000 cubic meters
The Salmone station of Zhengzhou Metro Line 2, where Changde detachment is located, is about 350 meters away from the platform and 30 meters vertically from the ground. There are many vertical holes in the subway, high voltage, complex lines, and the width of the pedestrian passage in the tunnel is only 60 cm, which is very difficult to fight. The rescuers finally decided to carry out the drainage operation by means of cofferdam relay. As of 18:00 on the 28th, the tunnel drainage of Salmonella subway station has reached 26000 cubic meters.
Changsha Fire drainage site
Changsha fire rescue workers are working in the transfer station between line 6 and line 14 of Zhengzhou Olympic sports center subway station. The subway station has three floors. The deepest part is 43 meters from the ground, and the height difference between the ponding water surface and the ground is more than 33 meters. The high-power waterlogging drainage vehicle cannot carry out conventional waterlogging drainage, and the water belt is very easy to be damaged by friction with the wall. The rescuers saw the move and successfully developed the outlet belt corner bridge protection on site to avoid the water belt damage caused by the direct friction between the water belt and the wall and corner; The utility model can effectively fix the water hose lines and avoid mutual interference and winding of the water hose lines; It also provides an effective fixed hanging point for the water belt in the process of vertical water supply, so as to ensure that the water belt will not break or burst due to its excessive gravity.
At 22:30 on July 26th, with water belt, the drainage line of the corner protection bridge successfully discharged water, and the water pressure and drainage line were very stable. As of 16:00 on July 27, the Changsha detachment had drained 31000 cubic meters. At present, the drainage operation has been completed, and the feet are on their way to the next rescue point.
As of 18:00 on July 28, the Hunan fire support force in Henan has drained 3.416 million tons of waterlogging, dredged 20700 cubic meters, transferred 23 personnel and transferred more than 500 materials. At present, all kinds of rescue work are being carried out in an orderly manner. Work together to overcome difficulties. Come on in Henan!