Reconstruction and expansion of the Yellow River Highway Bridge
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Yao Aijun and his project team
The construction plan is the soul of the bridge construction. According to the design, the reconstruction and expansion project of the Zhongwei Yellow River Highway Bridge is to build a new bridge next to the old bridge that has already been built. On June 2, 2013, he entered the construction site of the bridge. Project manager Yao Aijun, chief engineer Lin Jinyu and other members of the project successively formulated water steel bridges, underwater drilling platforms, steel boxes, underwater concrete cutting pile foundations, large-volume caps, Construction plans for 10 key processes such as hanging basket cantilevering.
The characteristics of this bridge are large. It is necessary to build a new bridge with a length of 1117 meters and a width of 24.5 meters next to the old bridge. Second, it is difficult, the river is narrow, the water is running fast, the river is 12 meters deep, and the old bridge is left behind. The concrete box and the near-thousand-lead wire cage stone will affect the construction of the new bridge foundation, and all of them will be cleaned up. Third, the risk is high, all of which are underwater and high-altitude operations. If you are not careful, it will leave a quality hazard or cause a safety accident. From underwater to water, from the construction of the steel bridge to the first bored pile foundation, from the hanging basket cantilever the first piece to the bridge as scheduled, no one can say that Yao Aijun, Lin Jinxi and the team members at the construction site How many rans, only know that they went out early and went home all day, busy at the construction site, each person has worn a few pairs of shoes.
The new bridge and the old bridge are only two meters apart. To build a new bridge next to the old bridge, one of the first problems encountered is to remove the three concrete boxes and the near-thousand-lead wire cage stones left when the bridge was built. In order to ensure the safety of the old bridge, the dismantling of the three old concrete boxes can not be blasted with explosives or mechanically broken. How can these old boxes be salvaged from the depth of 10 meters to become a problem.
The night is deep, the lights in the house of the project team are still on, they can't sleep!
At the beginning of the morning, Yao Aijun and Lin Jinxi, who had not closed their eyes overnight, finally developed a "diamond wire saw cutting method" after consulting relevant information. It is to use a diamond saw shaped like a rope to cut the underwater concrete box into blocks and then lift them with a crane. However, this method requires the diver to sneak into the 12-meter-deep river bed to drill holes in the object to be removed, and then put the "wire saw" into the object to be cut before cutting. This method is the first time on the Yellow River in the upper reaches of the Yellow River with rapid water flow and zero visibility in the deep water. It is technically difficult and has high safety risks. It is unprecedented in the construction of the Ningxia Bridge. Some people have raised objections.
"The construction of the bridge itself is risky. There is no risk that we need to do these things! Besides, we are not doing it without scientific basis!" Lin Jin, who had rarely spoken, was stunned!
On the day when the diver launched the diamond wire saw, the Ningxia Highway Construction Bureau and Ningxia Luqiao Company came to watch the experts. Lin Jinxuan was also nervous, and his hand was sweating.
“Successful!†When they saw the diver recovering the first cut from the Yellow River, the expression on everyone’s face changed from nervous to soothing. After a month, they finally removed nearly a thousand tons of old boxes and lead wire cage stones that were sinking at the bottom of the river from the Yellow River. The successful cutting of the underwater old crate with the "diamond wire saw cutting method" has become the first in the Ningxia bridge construction industry, and has also been passed down as a story by experts in the same industry.
Wang Dejun and his college apprentice
Building a road bridge and cultivating a group of technical talents is a historical testimony of Ningxia Luqiao's 50-year history and a glorious heritage of Ningxia Luqiao's corporate culture.
Wang Dejun, 46, has participated in the construction of three Yellow River Highway Bridges and several roads in Ningxia. He has extensive construction experience and has brought over 10 college technicians. Some of the apprentices he brought, some became project managers or chief engineers, and some became technical backbones. Wang Dejun was proud of this. On this bridge, Wang Dejun still carries eight college students from Chongqing Jiaotong University and Changan Jiaotong University. Wang Dejun knows that they have book theory, but lacks construction experience. He first teaches from the most basic hanging ropes, steel lashing, supporting molds, and concrete pouring. When they know a little, they will pour the piles and caps from the holes. The pier body, cast-in-place beam, bridge deck and other processes teach them to master the construction method of building the bridge.
Wang Dejun said: "The light teaching construction method is still not enough. They have to give them a burden. According to the majors of each person, they will be responsible for a sub-project independently. In the middle school, they will learn in the middle school and master the bridge construction technology as soon as possible."
Ma Wei, graduated from Chongqing Jiaotong University, majoring in road and bridge, Wang Dejun asked him to be responsible for the construction of the No. 13 main pier and the bridge No. 0 to No. 12 pier; Ding Yongtong, graduated from Ningxia University, majoring in highway engineering, Wang Dejun asked him to take charge of the bridge 14 Construction of the main piers No.15 and No.16; Zhang Xueting graduated from Chongqing Jiaotong University with a major in bridges. Wang Dejun asked him to be responsible for the construction of deep water piers on the 17th, 18th and 19th. After three years of training and practice under the leadership of Wang Dejun, these three college students have mastered considerable construction techniques and are basically able to construct independently.
Ding Yongtong said: "In the construction of the bridge, we didn't understand anything at the beginning. Master Wang taught and taught the construction experience, let us learn the construction technology of building the bridge. This is the biggest gain of our three graduates after college."
Jing Wen and his bridge security officer
"Jing Shuji, because I did not listen to you, I put the protective net in time. A migrant worker accidentally fell off the two-meter-high deck, but he was only slightly injured. I have now set up the fence, please You go to check." A migrant worker's workman admits mistakes to Jingli, who is responsible for safety.
"It is not easy for migrant workers to make some money. If there is a personal accident, how can you give it to someone else's family! I spend money to buy a protective net. Do you even have time to set up?" Jingwen was really angry.
The construction of the hanging basket used in the newly built Zhongwei Yellow River Highway Bridge is a new technology and the largest hanging basket in the Yellow River Highway Bridge that has been built in Ningxia. The construction of the hanging basket is to hang a 3-5-meter diamond frame at the pouring end of the connecting pier, and use the boom to hang the 306-ton template and concrete for construction. The whole construction process is suspended, just like the weightlifting athlete will have two The arms are stretched in parallel and then suspended 100 kg of weights on the backs of the two hands. Therefore, there are higher security risks and security risks in the construction of hanging baskets.
The night is deep, and the Yellow River is rolling over the waves and the surrounding villages are completely silent. The construction site of the cantilever pouring of the bridge construction site is still brightly lit, and the 7 groups of hanging baskets roared around the clock. After each set of hanging baskets is poured into a set of concrete blocks, they are removed and moved forward. If you violate the operating procedures, it will lead to basket dumping and personal accidents. In order to ensure the safety of the construction of the hanging basket, the implementation of "one post and two responsibilities", everyone is a security officer. Jingwen, security officer Li Zongyao and technicians Ma Wei, Zhang Xueting and Ding Yongtong have no less worry. They developed specific construction plans and control measures based on 50 safety risk points that are likely to occur in the construction of hanging baskets. Every day on the construction site, go back and forth dozens of times, eyes on the high-risk point of hanging basket construction, bridge construction, to see who did not wear a helmet, who did not wear a seat belt. In each process before, during, and after the move of the basket, the technician checks first, then the full-time security officer checks, and finally the person in charge of the quality inspection department checks. After the "three inspections", the next process can be carried out. For those migrant workers who are disobedient and violate safety practices, Jingwen has ordered to stop work and even blame. Those operators saw both Jingwen and Li Zongyao, but they respected them. They also know that both Jingwen, Li Zongyao, and those technicians are good for them, and they are the protectors of their lives!
“Jing Literature is a protector!†This is a sacred and noble reputation. Jing Literature’s heroic deeds of saving two men on the Yellow River have been praised by local villagers and have been passed down from Zhongwei to the people’s beauty.
On the morning of March 15, 2013, Wang Dejun and Jing Literature, the captains of the busy construction site of the bridge construction site, suddenly heard an eager cry for help and sirens from the upper reaches of the Yellow River. Looking down on the voice of the call for help, there is a figure floating in the river about 500 meters from the construction site of the Steel Bridge. Jing Literature opened the speedboat and immediately took two lifebuoys and a steel bar that was more than 5 meters long and handed it to the drowning person. However, because the drowning person soaked in the cold river water for too long, the body was frozen and the consciousness was blurred, and the lifebuoy was not caught. Jing Wenxue, Wang Dejun, Li Zongyao and two other construction workers lifted half of the body into the water to rescue the youth. The 120 waiting for the shore will send the youth to the hospital for treatment. The young man is finally saved. One evening, a busy day of Jing Literature just returned to the project department and prepared to eat. Suddenly, the local public security department called Jingwen for help, saying that a 63-year-old man accidentally fell into the Yellow River and asked Jingwen to save people. Jingwen said nothing about driving the speedboat to rescue the man who fell into the water.
It is because of these protection gods that from the construction of the bridge to the bridge, there is no general safety accident. On August 22nd, on the day of the bridge, the builders gathered around the bridge. When the last piece of concrete was placed on the pier, they set off firecrackers. Applause and laughter come and go, unable to hide the excitement. Jingwen stood on the bridge and looked at the Yellow River water that was far away.
At the construction site of the Yellow River Bridge, Wang Dejun, the director of the work area, spoke out the voices of all Luqiao people. He said: "The choice of roads and bridges has already prepared for the long-term suffering. It is Ningxia Road and Bridge that raised me, and I have supported my family. I want to thank the roads and bridges, do my part, and do my best. Work is not awkward!"
Indeed, a bridge can hardly leave the construction site from the day of construction, especially front-line technicians and workers.
"Because the construction is too busy to return home, my wife often comes to the construction site to see me. This is a normal thing." Wang Hong, director of the materials department said.
"My son is 11 years old this year. In the fifth grade, I have been picking up my car. One time my son was hospitalized with a high fever. I was accompanied in the hospital for 7 days and 7 nights." An employee's wife complained.
During the holidays, the wife brought her children to the construction site to reunite with her husband, wash clothes for her husband, and wash the sheets, which is the happiest moment for the family. There was a guy named Ma Wei who didn't have time to go home to take a wedding photo because of the construction. After the girlfriend came to the construction site several times, from complaining to support, he finally took a wedding photo at the construction site.
There is no rhetoric, only silent action. This is the new generation of Luqiao people.
