Tunnel "drummer" sounds safety
At 0:00 on July 2, Lufeng south station, the operation vehicle slowly started and drove to jinjiaying tunnel.
In the vehicle, Zhu Jiedong, the monitor of lufengnan public works area of Guangtong Gongdian section, once again explained the key points of the "skylight" to the workers participating in the operation: "this is the first" skylight "for our tunnel percussion inspection. We must pay attention to the impact strength and sound identification, and pay attention to the eyes and sound carefully."
In this "skylight", they have to knock down the downline of jinjiaying tunnel and sanjeshu tunnel in the section from Lufeng south to Shuangmei village on Kunming Chuzhou railway.
The 62 tunnels of Kunming Chuzhou line in Guangtong Gongdian section occupy nearly 140 km of the line, and the proportion of tunnels is relatively high. Lufeng South working area is responsible for the 68 km line between Lufeng South and Wenquan, including 10 tunnels, with a total length of nearly 30 km.
At 0:30, the vehicle arrived at jinjiaying tunnel. "Liu Qingshan and I respectively took a person to inspect the arch waist to the arch foot on both sides of the trolley. Wang Xiaolei and Tang Longjun were in the middle of the trolley to check the vault to the arch waist. If there was any abnormal noise, we should stop first and make records after confirmation." After Zhu Jiedong's division of labor, seven employees tied up protective belts and quickly climbed onto the working platform.
The sound of "dangdangdang" broke the silence in the tunnel. The light of several headlights converges to shine the top of jinjiaying tunnel. This group of tunnel "drummers" hold tamping rods and hand hammers to check the hidden dangers in the key parts of the tunnel vault and arch waist. The sharp percussion sound of the tamping rod, the short collision sound of the hand hammer and the bagpipe sound of the operation vehicle interweave together, playing the "Symphony" of troubleshooting.
"Dong Dong Dong..." There was a dull noise.
"You stop, I'm not quite right here, it should be the empty sound of the lining!" At 1:15, the working vehicle went to jinjiaying tunnel, 1002 km, 285 meters. Wang Xiaolei, a bridge and tunnel engineer, stopped the inspection team to report the problems found.
Zhu Jiedong picked up the tamping rod and knocked for a while, and said to Wang Xiaolei, "yes, this kind of dull sound is indeed the empty sound of lining. There is no problem in other positions. It's not on the original record. It's a new disease. You mark it with red paint, remember the size, take a good picture, and we'll continue to check. "
At 4:00 sharp, they finished the percussion inspection as planned. "If the hidden danger can not be found in time, it will bring safety risk to the train operation, so we should be very careful and careful in our work." After several hours of percussion, Zhu Jiedong, who couldn't lift his arm, carefully flipped through the hidden danger photos in his mobile phone and breathed a long sigh of relief. The vehicle slowly drove out of the tunnel, and the lights cut a hole in the dark night.
This "skylight", Lufeng South work area found nine hidden dangers of lining air noise in two tunnels. After all the percussion inspection, they carried out the construction and renovation of these diseases.