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Sidelights on the construction of Lanzhou-Zhangye third and fourth line railway
Seetao 2021-10-19 17:05
  • The Lanzhou-Zhangjiakou Line 3 and 4 railway runs through the Hexi Corridor and will become a new channel from Lanzhou to Xinjiang
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In the golden autumn, the sky is high and the clouds are light, and the project construction boom is surging. Recently, a reporter from Jiandao.com came to the construction site of the continuous girder bridge of the Qingshuihe Bridge in the ZQ5 section of the newly built Lanzhou-Zhangye third and fourth line railway from Zhongchuan Airport to Wuwei. The piers stretched into the distance under the rising sun, and the reflection on the ground was like The indicator measures the Wuwei efficiency of high-speed rail construction.

The machine rumbling and the lights flashing on site, the crane tower was lifting steel bars back and forth, and the workers were busy carrying materials or stepping up the bridge construction work. The construction scene was full of enthusiasm. This high-speed railway, which the people of Wuwei are looking forward to, has shown its embryonic form in the intense and orderly construction of the workers. The bridgehead of the Hexi Corridor—Wuwei is gradually moving towards the era of high-speed rail.

According to Qiu Yanya, general director of the project department of the ZQ5 section, the ZQ5 section of the Wuwei section of the Lanzhang Third and Fourth Line Railway is located in Wuwei City, with a total length of 49.092 km and a total contract cost of 2.207 billion yuan. The main construction content includes subgrade, super bridge, bridge, middle bridge; continuous beam, continuous steel structure, cast-in-place simply supported beam, beam yard, beam making and erection, Wuwei East Station.

So far, the completion of temporary construction projects accounted for 100% of the total design; the completion of bridge construction pile foundations accounted for 97.16% of the total design; the completion of excavation foundations accounted for 99.25% of the total design; The completion accounted for 87.54% of the total design; the completion of the pier opening accounted for 87.92% of the total design, and the continuous beam 80.27%; the completion of the box girder prefabrication accounted for 58.22% of the total design; the completion of the erection of the box girder accounted for the total design 28.08% of the total volume; the completion of subgrade earth and stone filling accounted for 57.18% of the total design.

In the continuous beam construction section of Beixian Expressway, various construction and management personnel wearing red, white and yellow safety helmets shuttle between the bridge piers and the bridge subgrade. "September and October are the best golden periods for construction. In order to work hard to ensure progress, we set up a party member commando team and a youth commando team to stay at the construction site day and night, focusing on construction and production on the one hand, and safety and quality on the other." ZQ5 Said Zuo Jun, secretary of the party branch and project manager of the bid section project.

Zhou Tong, deputy secretary of the party branch of the project department, told reporters that the Lanzhou-Zhangye third- and fourth-line railway will become the second high-speed rail passage in the direction of Lanzhou to Xinjiang after the Lanzhou-Xinjiang high-speed railway, connecting the provincial capital Lanzhou and Lanzhou New District. It will be shortened to one and a half hours to create an efficient and convenient one-hour economic circle, which will greatly promote the complementary advantages and win-win cooperation of cities in the provincial capital economic circle, and shorten the travel time between cities in the province and surrounding provincial capital cities.

Closure of Continuous Girder of Zhuanglang River Bridge

On October 9, 2021, after 156 days of tenacious struggles with high altitude, low temperature and oxygen deficiency, the ZQ3 Biaozhuang Langhe Extra Large Bridge on the Lan-Wu Section of the Lan-Zhang Third and Fourth Line Railway undertaken by the Municipal Environmental Protection Company of the China Railway First Bureau continued The beams (length 145.5 meters, width 12.2 meters) are fully closed, and the assessment target of this key construction node is completed 5 days in advance.

The ZQ3 bid project of the Lan-Wu section of the Lan-Zhang third-fourth railway line is located in the Tibetan Autonomous Region of Tianzhu County, Gansu Province. The year-round low temperature and hypoxia in high-altitude areas always test the body and mind of the builders. Since the continuous girder construction started in May, the project department has insisted on party building to lead the process to ensure safety; leaders led shifts to ensure safety; multi-pronged approach to ensure quality, and made every effort to ensure that the entire bridge was closed on schedule.

The continuous girder of the Zhuanglang River Bridge has achieved full bridge closure, ushering in the first start of a decisive victory over the labor competition in the fourth quarter. This marks the phased victory of the project construction and lays a solid foundation for the later box girder erection and track laying work. Base. Editor/He Yuting

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