Major construction progress!The second phase of the Guanglian Expressway is expected to open at the end of the year!

You have been looking forward to

New progress of Guanglian High Speed

Finally here!

The countdown of traffic is in progress ...

Guanglian highway flowers ushered in major construction progress from the section! Connecting the second highway of Guangzhou Xinbaiyun International Airport and the mountains in front of the Daguang Expressway to interconnect and make friends. Recently, it has successfully connected, creating favorable conditions for the opening of the entire line at the end of this year.

The Guangli Expressway started in Huadong Town, Huadu District, Guangzhou. Finally, it was designed according to the standard of Da Road in the city of Qingyuan Lianzhou City. Among them, the first phase of the project was about 193 kilometers long from Huahua to Lianzhou section (Sanfengli interoperable to the north), and opened to traffic on December 31, 2021. The first phase of the project from the remaining sections of the Lianzhou section (Sanfengli interoperable to the south) and the flowers to the Conghua section are about 38 kilometers long. It is planned to be opened to traffic at the end of 2022.

The Qianqian hub interchange is an important part of the flowers of the Conghua section of the Conghua section of the Guanglian Expressway. There are 9 main lines and ramp bridges. Among them, 3 bridges across the Greater Guangzhou Expressway, and 3 bridges across Guangzhou Xinbaiyun International Airport No. 1 The second highway, the 5 -seater bridge across the provincial highway 381.

Under the smooth penetration of the hub interchange is the challenge of the builders' breakthroughs

Cross -speed high -speed innovation construction coincidence construction

Guanglian High Speed ​​Flower from the Duanshan Oral Hub Interchange Overline Interchange Speed ​​on the Greater Guangzhou High Speed ​​Speed ​​Beams to 85 meters, divided into two left and right, and continuous beam construction is the construction site with the highest risk of interchange between the hub interchange. big. Among them, Daguang high -speed is a two -way six -lane, with an average daily traffic of more than 100,000 vehicles.

In order to ensure the completion of the section of the section of the section of the section under the normal traffic of the Dazuang high speed, the construction team adopts the upper high -speed hanging basket to protect the construction operation. composition. Compared with the traditional construction process, the construction of the hanging basket does not block traffic, and the cost cost is lower.

However, due to the left and right bridge distance of only 25 cm, the operating space is limited, and the two hanging baskets cannot be constructed simultaneously. To this end, the project department adopts the clever "scissors difference" construction method, and staggered two hanging baskets to simultaneously construct it, thereby improving the construction efficiency.

At the same time, during the construction of the second highway ramp of the Xinbaiyun International Airport of the Guangzhou -Guangzhou International Airport, the project was adapted to local conditions, and the prefabricated beam was installed. The prefabricated beams all came from the 5G smart beam farm built by the project department. Liangchang has Longmen hanging face recognition, platform system, intelligent tensor system, intelligent sinking system, automatic spraying system, etc., which fully realize intelligent intelligence in the aspects of steel processing, beam tensor care, intelligent grilling, information storage, etc. change.

The beam machine turns the small bend to calmly cross the bridge

With such a small turning radius, such a large vertical horizontal slope, the beam machine cannot be set up at all. At the construction site of the interchange in front of the mountain, the builders encountered difficulties.

There are 11 ramp bridges across the project, and 1071 榀 of the prefabricated beams. Among them, the rolling bridge prefabricated box beam with a turning radius of less than 250 meters is 100 榀, the minimum turning radius is only 150 meters, but the maximum horizontal slope reaches 6%, especially in it, especially in During the construction of the front of the hub in the mountains, the curve was extraordinary. At present, most of the domestic highway beaming machines are only suitable for a bridge with a turning radius of more than 300 meters, longitudinal slope and horizontal slopes within 4%. The beam machine is on the shelves of such narrow and steep ramp bridges. There are almost no mature experience in China in China. For reference.

In order to set off the "hard bone" of the ramp bridge prefabricated beam, the project group set up a scientific research research team, and finally determined the small curve frame beam frame beam plan. The distance between the beams greatly reduces the turning radius of the beam machine, so that the beam machine has changed from a "big truck" to a "passenger car", which can "calmly" cross the bridge.

However, after the radius is narrowed, the safety and efficiency of various processes when the beam machine turns into a new problem. The project team has also set up a rotary support in the legs of the beam machine, which is equivalent to adding a "turntable" that can be freely rotated to the beam machine. Turn, rely on each other to rely on each other to realize the posture, the beam machine moves forward in the curve and the processes of the beams of the beams quickly. In addition, the project scientific research team also converted the connections between the two main beams into a rotatable type, allowing the "passenger car" to accelerate the corner.

Through a series of technological innovation and refined management, the project construction has been promoted smoothly, and various tasks have been steadily and orderly. They have contributed wisdom to the high -speed cracked connection to the entire online traffic of Guanglian. Directly to Guangzhou created convenient conditions.

Source: Guangzhou Daily

Editor -in -chief: Qingyuan Radio and Television Railway Media Operation Center

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