Wear the desert sand and sea all the way -S254 Line Captain Pingzhi to and the last highway construction plunder

Pomegranate/Xinjiang Daily reporter 逯 逯 逯 逯 逯 逯 逯

On June 30, the S254 Line of the Taklama Gan Desert crossing the world's second largest migrant desert, the S254 Line Captain to the Line and the last road will be opened. In the past 5 years, the road builders have the spirit of "Yugong Moving Mountain", war, sand, high temperature, and sand barriers to add more ways to the Taklama Gangyan Desert.

Wei and Highway aerial photography. Pomegranate cloud/Xinjiang Daily reporter Han Liang photo

Let Shashan down to fill the depressions

The biggest challenge to repair roads in the desert is sand.

Wei and the highway 334 kilometers, of which the desert section reaches 307 kilometers. The rolling Shashan is the difficulty that the builder must overcome.

"There are 32 tall sandy mountains in the whole line, and there are 28 hill depression. We must not only dig the sand mountain, but also fill the depression." Say.

The highest one is nearly 100 meters, and the amount of excavation reaches 1.5 million cubic meters, accounting for one -eighth of the entire project.

In order to overcome this "block", the project team finally selected the "three -layer push method+belt machine transmission" construction method after more than 10 "brainstorming storms". The top layer of the sand dunes adopts a horizontal push method. The middle layer of the sand dunes adopts the oblique push method. The lower layer of the sand dune adopts the vertical push method. Through this method, the push distance is reduced to the greatest extent and improved the efficiency. The project team designed a conveyor belt with reference to the coal mine transportation method, using the bottom of the dunes as the sand -losing section, and the other section extended to the filling section or abandoned the soil field to achieve uninterrupted sand loss for 24 hours.

"Even so, we pushed more than 40 large -power tracked bullets for 150 days before we completely smoothed this tallest Shathan." Wang Yunfei said.

From October 2017 to September 2020, the project team finally launched a 300 -kilometer Shaki in the desert for more than two years, laying the foundation for the smooth construction of the project.

High temperature war, wind sand adhere to the desert

"In the summer of 2017, I first visited the line on the line. As soon as I got out of the car, the heat wave surrounded me, stepped on the sand, and the soles of my feet were painful. At a time when I stepped into the desert, Wang Yunfei still remembered.

The heat is a major test facing project builders. The temperature of the Taklamagan Desert in summer is close to 70 ° C. The ground spit the tongue, and the hot sand is enough to bake raw eggs.

On one occasion, Jing Wenyun, the chief engineer of the road project, buried a raw egg in the sand. After more than an hour, the eggs were cooked.

Construction workers are paving asphalt. Pomegranate cloud/Xinjiang Daily reporter Han Liang photo

Under the high temperature, the most difficult is asphalt operation. The asphalt workers can be described as "love and hate" in summer. Love is because asphalt needs to be heated to a certain temperature to lay it. Once the asphalt is cooling, it is easy to solidify and harder, affecting the quality of construction. The higher the temperature, the asphalt is not easy to cool, thereby ensuring the quality of construction. Hate is because the feeling of "steaming sauna" in the desert is too uncomfortable.

The surface temperature of 70 ° C, plus asphalt that just rolled from the pavement machine and over 100 ° C, the hot heat penetrates the soles of the soles of the soles. Among them. "You can't stay for more than a long time in one place. You have to work while walking back and forth to a little better." Jing Wenyun said.

Accompanied by high temperature is wind sand. From March to July each year is the windy season in the desert. When the wind rolls, it rolls with sand and dust. "Sometimes people who can't see the road opposite the road can only be suspended." Jing Wenyun said.

In the "Sea of ​​Death", there is no water, no electricity, no signal, high temperature and heat, wind and sand, and the road builders are insisting in this environment, and they will go out a big road little by little.

600 miles of sandproof barriers to guard highway

"To build roads in the desert, we must fix the sand first, otherwise the flowing sand dunes will bury the road. We construction and laying reed grass squares on both sides of the road." Wang Yunfei said.

Highway builders borrow from other desert roads and sand prevention and sand prevention. The entire line of grass squares protection projects is built on both sides of the road base. The first is to reduce the surface wind speed to achieve sand fixing and protect the base side slope of the road. Wind sand directly buried the road base; on the side side of the grass, one or two obstacles to the sand prevention, one is to block part of the wind accumulation sand, and the other is to reduce the wind speed.

Workers are laying grass squares. Pomegranate cloud/Xinjiang Daily reporter Han Liang photo

In the hot sun, the builders climbed up the dunes, put a bundle of reeds in the laying place, put it neatly, and stepped into the sand with another foot to form a spectacular sandpiece stretching more than 300 kilometers.

On the afternoon of June 27, the reporter walked along the Wei and Highway. The grassy hill on both sides of the road stretched, the widest part was 110 meters. In the past 5 years, the builders have paved a total of 58 million square meters of grass. "Put the area of ​​the grass squares into a mileage, and you can go around the equator for 3 laps." Wang Yunfei said.

The application of "grass squares" technology can not only reduce the surface wind speed, play a role in preventing sand and sand, but also cut water to improve the water content of the sand layer, which is conducive to the survival of sand fix plants.

With the completion of the highway, many green plants have grown in the grass grids on both sides, including reeds, wind rollers, shuttle, etc., and a little green, adding a lot of vitality to the "sea of ​​death".

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