Construction has highlights, and construction is creative!Taiyuan Northwest Second Ring high -speed construction is over half

On July 29, the reporter learned from the Taiyuan Northwest Second Ring Expressway Development Co., Ltd. that as of mid -July, the company has successfully achieved the "double and half" goal with more than half of the highway construction and more than half of the tasks.

(Information picture)

The project includes three parts

The G2003 Taiyuan Ring Expressway Yoshiwang to Lingjing Store (that is, the Northwest 2nd Ring Road in Taiyuan) has a total length of 160.353 kilometers. It opened in early 2020. The construction period is 4 years. It is expected to be completed and opened to traffic by the end of 2023.

The second ring northwest of Taiyuan consists of the West Second Ring Road, the North Second Ring Road, and the Taikoo High -speed Link.

The line passes through Qingxu County, Gujiao City, Yangqu County in Taiyuan City, Jiaocheng County, Luliang City, and Jingle County, Xinzhou City.

The starting point is located in the east of Yixi Village, Jiaocheng County, Luliang City. G5) Taiyuan to Yangquan section.

The Northwest 2nd Ring high speed is different in different sections, and the design speed is different. Among them, the starting point to the Chimiwa section is a two -way four -lane, with a design speed of 80 km/h; the Xilingjing to Dadu section is a dual -line four -lane, with a design speed of 100 100 Komem/ht; Dadu to the terminal (the east section of the North Second Ring Road) is a two -way six -lane, with a design speed of 100 kilometers per hour.

There are 13 tunnels in the northwestern second ring, with a total length of 36218 meters; 81 bridges, a total of 30277 meters, and 41.47%of the entire bridge tunnel ratio.

There are highlights of the construction of special tunnels

Speaking of the high -speed design highlights of the Northwest Second Ring Road, we have to mention the special tunnel.

Generally speaking, the tunnel length is more than 3 kilometers, which can be called a special tunnel. The Taixu Tunnel, the Camelshan Tunnel and the Niubinshan Tunnel on the Northwest 2nd Ring Road are 8,796 meters, 7185 meters, and 6612 meters in length, all of which are controlled node projects.

The Taixu Tunnel is connected to the Township of the Township of Qingxue County and Xingjiaxianshe Township of Gujiaxiao City. The design of the tunnel is 80 kilometers per hour. The Taixu Tunnel is all two -way 4 lanes, which are divided into left and right holes, each with two lanes.

The Camel Mountain Tunnel is located between the mountains between Xilingjing Village, Xingjing Township, Yangqu County and Beishan Village. The right line of the Camel Mountain Tunnel is 7185 meters in length and 7171 meters in the left design.

Niubinshan Tunnel is connected to Dawei Town and Donghuangshui Town of Yangqu County. The design speed of 80 kilometers per hour in the tunnel is 6.6 kilometers in length. It is divided into left and right caves. There are 3 lanes each, with a maximum speed of 100 kilometers. /Hour.

Three special tunnels are located in mountainous areas and are difficult to build. In order to ensure the construction period, the three tunnels all use the method of "oblique well construction". Simply put The oblique well excavates from the middle. In this way, the excavation of the one -way tunnel has changed from 2 to four, which doubles the construction efficiency.

As of late July, the Taixu Tunnel currently excavated 4697.9 meters and 53.7%was completed; 5094.4 meters were excavated on the right line and 57.9%were completed; Mi, 57.3%; 4900.4 meters on the left line of the Niujinshan Tunnel, 74.2%; 5345.7 meters on the right, 80.8%. The oblique wells of the three tunnels have been completed, and it is expected to be completed next year.

The highest bridge pier construction is creative

In addition to the three special tunnels, the highest bridge pier in the northwestern second ring -Yanjiashan No. 2 bridge is impressive.

Yanjiashan No. 2 Bridge is located in Yanjiashan Village, Jialequan Township, Gujiao City, with a total length of 528 meters. Among them, the 11th pier of the bridge is 81.1 meters, which is equivalent to the height of more than 20 floors. The highest "head" pier in the 85 bridges of the main line is very difficult to build.

In order to ensure the construction period, this bridge adopts a "hydraulic climbing mold" new process during construction, and the bridge pier template can automatically "climb".

A bridge, the bottom of the bottom is equivalent to the "foot", and the towering pier is the "leg", supporting the flat bridge surface above. Geng Chao, the manager of the ZH07 bid section of the project, said that the geographical location of the bridge is very special. It is located in the "V" groove valley. In order to maintain the overall coherence of the high -speed pavement, the pier pillar is much higher than that of other bridges. The pier is high, and the difficulty of construction has increased accordingly. This is because when pouring the bridge pier with concrete, first build a template outside the steel bars. Under normal circumstances, it is done by layer by layer. However, such a height, artificial operations have certain risks, and the construction speed must be affected, because workers climb from below to the highest place for at least 20 minutes. In view of this, the project department adopts a new process of "hydraulic climbing mold". In short, it is the one -time assembly of the bridge pier template, and then the hydraulic system is used to allow the bridge pier template to automatically climb, so that the process of installing template operations many times, The construction efficiency has been improved by one -third, and costs are also saved.

On July 20th, with the completion of the final concrete pouring of Yanjiashan No. 2 bridge pier 11, the smooth ceiling of the highest pier of the main line was achieved. After the construction of the next step of the bridge was completed, the prefabricated T beam stand was erected and prevented. The upper structure of the bridge such as the collision fence and bridge paving is expected to be penetrated at the end of August.

Yang Yong, Secretary of the Party Working Committee and Chairman of Taiyuan Northwest Second Ring Expressway Development Co., Ltd., introduced that the 12 standard sections of the Taiyuan Northwest Second Ring project are riveting and motivated to accelerate the advancement.Up to now, this year's investment was 1.92 billion yuan, 24.0%of the annual investment plan was completed, 13.71 billion yuan of investment was completed, 53.7%of the total investment was completed, and the goal of more than half of the highway construction time, half of the investment, and more than half of the tasks.According to the relevant person in charge of the Municipal Transportation Bureau, after the completion of 2023, it can provide fast and convenient transportation services for the Da Taiyuan Metropolitan Circle, which is of great significance for improving the national highway network and the provincial highway network.The development pattern of "one core, one circle, three groups" has a direct promotion role.Reporter: Qi Xiangzhen

Taiyuan Daily

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