On May 29, at the box girder erection construction site of Baiyanhua Trans-Baoland Railway extra-large bridge of Baoland high-speed Railway of Baoland, with the construction personnel operating the bridge erection machine, a pin of box girder weighing 900 tons was accurately placed on pier 35-34, marking the completion of the erection construction of a total of 8 pin of box girder of Baoland high-speed Railway of Baoland high-speed Railway, and the subsequent paving construction transportation channel was opened. It has laid a solid foundation for comprehensively setting off the construction boom.

The erection of the eight box beams is located in Baiyan Hua span Baolan Railway bridge No. 42-34 pier, for the business line II construction, the construction of the "skylight point" is 7:20 to 9:20, during May 20 to 29 completed 8 times erection.

In order to ensure the safety of Baolan Railway operation, it is necessary to block the line in advance, interrupt the train operation, carry out double-line power outage, and complete the bridge erecting machine through the hole, beam feeding of beam transport car, box girder girder positioning, box girder support anchoring, bridge deck isolation protection, bridge deck and existing line safety confirmation within 120 minutes. The overall construction time is tight, the task is heavy, the risk is high, and the safety requirements are high. It is one of the high-risk operation projects of Bao-yin high-speed railway, and it is also the key control project of the whole line.

"In the construction, we use SXJ900 bridge erecting machine supporting DCY900 beam truck for combination operation, select experienced technical and safety personnel and bridge erecting machine operation group, constantly optimize the connection of the beam process, prepare the table of box girder erection time, after many field drills, under the premise of ensuring safety and quality, The beam construction time is compressed within 90 minutes to ensure the smooth implementation of the existing cable beam construction." Said Wu Yiqian, technical director of the project.

At present, 464 trusses of box girder erection have been completed, and the remaining 34 trusses are expected to be completed by mid-June. Next, the project will continue to optimize the construction organization, actively carry out the handover of the track-laying working surface and the construction preparation before the track-laying, rationally allocate resources, ensure safety, quality and duration, and lay a solid foundation for the subsequent construction of the track project.

Baoyin high-speed railway is an important part of the Beijing-Lanzhou channel of China's "eight vertical and eight horizontal" high-speed railway network, with a design speed of 250 kilometers per hour and a total length of 420 kilometers. The company mainly undertakes the construction tasks of 498 trusses of box girder erection and 252 double-track kilometers of track laying for Bao-Yin high-speed railway.

After the completion of the project, the fastest train travel time from Baotou to Yinchuan will be shortened from 6 hours to 2 hours, which is of great significance to the joint development of Hubaotou Economic zone, Ningxia Yanhuang Economic Zone and Lanbai Economic Zone, and promote the economic and social development of Inner Mongolia, Ningxia and Gansu. Editor/Wang Tian