City Governor · Recommended Officer | Du Changyan: Witness "Wanli Yellow River First Tunnel&quo

New Yellow River Reporter: Chai Yingying

On September 29 last year, it was a day worth remembering for Du Chang. The "first tunnel of the Wanli Yellow River" was officially opened to traffic on the Jinan Yellow River Jixu Road Tunnel. For 45 months, Du Changyan was extremely unforgettable.

Du Changyan is now the project leader of the project of Jixun Road, the Great Shield Company of China Railway 14th Bureau, and the project chief engineer responsible for the "first tunnel of Wanli Yellow River" at that time. After the Yellow River Jiyu Road Tunnel was opened to traffic, he also assumed the heavy responsibility of building the north extension of the tunnel, witnessing the closer of the distance between the two sides of the Yellow River and the growth of urban transportation.

The name of the "first tunnel of the Wanli Yellow River" is well -known, and the builders behind them have paid countless efforts.

The Jinan Yellow River Jixu Road Tunnel, which was built by the 14th Bureau of China Railway, is one of the largest shield tunnels that have been built in my country. It is the first traffic tunnel jointly built by the Yellow River Basin. The "hanging river" on the ground created a new era that crossed the Yellow River from the water to the underwater.

Beginning in September 2019, the "Yellow River" and "Taishan" two large diameter mud water balance shield machines have been excavated, and for the first time, they opened the great crossing of "hanging river" on the ground in human history.

"The outer diameter of the Yellow River Tunnel Shield Tube is 15.2 meters, which is the first time the large diameter shield tunnel has crossed the ground hanging river. Go to the test of the last opening. "Standing near the Yellow River Jixu Road Tunnel, which was already opened to traffic, I recalled that Du Changyan was emotional.

He said, "During the construction process, one of the problems we encountered is high -stick powder clay and calcium tuberculosis. The calcium tuberculosis has high strength and large content. By 45 MPa, the largest ones reached 90 MPa, which has a great impact on our shield construction and is often 'stuck' during construction. "

New Yellow River reporter has learned in previous interviews that this is the first time that human beings cross the ground to "hang the river", and every one meter can be "shocked". The construction of the "first tunnel of the Wanli Yellow River" lasted 45 months, with a total investment of nearly 6 billion yuan. The peak period was invested in 2,000 people.

From the digging to the penetration, "crossing the river by touching the stone", each ring condensed the wisdom and hard work of the builders. Du Changyan said that the Yellow River in the mouth of the Langkou section is a veritable "hanging river". The river bed is 5 meters above the ground on the south bank of the bridge, the maximum flood is 11.62 meters high, and the lowest point of the tunnel is 54 meters under the river bed. Once leakage, at least the tunnel is overwhelmed; under the Yellow River, there is a pot of water in a pot of water. Once leakage, there is the risk of flooding the city. In the past three years, it will be as thin as ice every day. "

Du Changyan remembers that one of them was particularly difficult to advance, and it pushed a ring 28 hours and encountered 56 large pieces of calcium tuberculosis. In addition, the content of sticky particles in the powder clay of the Yellow River Tunnel is relatively high, and the amount of waste pulp produced in a ring reaches more than 1,000 cubic meters, which is particularly pressure on mud water treatment. Later, they guaranteed through scientific research and a series of measures. The green and efficient treatment of waste pulp also guarantees the efficient excavation of the Yellow River Tunnel.

On July 5, 2021, the key technical summary of the Jixi Road Tunnel Project of the Yellow River in Jinan and the Northern Yan Tunnel Construction Plan Expert Consultation Meeting was held in Jinan. The evaluation of the Jiyu Road Tunnel is "a high -quality project supported by scientific and technological innovation."

Now driving in this "Wanli Yellow River First Tunnel", it can be seen that the upper -level two -way six -lane municipal highway can be seen. The lower floor reserves rail transit roads. In the future, you can also take the subway through the Yellow River.

"Every time I drive, I feel very proud to see my participation in the tunnel. Seeing so many vehicles passing by. This tunnel better serves people on both sides of the Yellow River. The Jixu Road Tunnel improved the road network of Hebei, promoted the connection between Jibei and the main urban area. It can "wear yellow" in 4 minutes, which undoubtedly enhances the soft power of the city.

Now, Du Changyan is responsible for the north extension of the Jixi Road in the Yellow Tunnel. This is the continuation of the Jiqi Road Tunnel of the Yellow River. The starting point is the open section of the north bank of the Yellow River Tunnel. Take the National Road 308.

Du Changyan said that the Beiyang Tunnel Project will improve the north bank of the Yellow River. At that time, the tunnel planned roads with Heroes Mountain Road, Dawi Er Road, Jiqian Road, and the starting area to form a north -south main axis connecting the main urban area and the core area of ​​the starting area. , More promoted the development of crossing Hebei, and improved the connection between the main urban area and the Jibei Center.

This tunnel will provide more solid transportation support for the new pattern of urban development in Jinan and the implementation of the "ecological protection and high -quality development of the Yellow River Basin" in Jinan City. The transportation system is also of great significance.

New Yellow River reporters learned that within the area of ​​Jinan City, the Yellow River channel is about 183 kilometers in length. At the beginning of the "Fourteenth Five -Year Plan", there were 13 cross -yellow channels in Jinan City. Open to 15 to 15.

The density of cross -yellow channels has increased significantly, and the collaborative effect and scale effect of the channel have been displayed, which has enhanced the toughness of the urban road network.High -quality development strategies, "north cross" strategy, and the strong starting area of new and old kinetic energy provides strong traffic support to inject new kinetic energy.Edit: Weekend

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