Under the recent super cold wave, the temperature in many places in Jiangsu has fallen to the lowest level in many years. However, the constant "ice cellar" environment has not dampened the enthusiasm of traffic builders. On the day of the winter solstice on December 22, the reporter came to the construction site of a number of cross-river bridges to explore the construction site of the cold winter.
December 22 is the first day of winter number nine. Affected by the cold air, the temperature on Chongming Island dropped significantly, with a daily maximum temperature of 0 °C and a minimum temperature of -6 °C. At the site of the Chongqi Railway Yangtze River Bridge project undertaken by China Railway Bridge Bureau, dozens of cranes are running non-stop, and workers are neatly wearing safety helmets and life jackets, and they are busy in their respective posts.
It is reported that at present, the steel cofferdam of the No. 3 main pier of the Yangtze River Bridge of Chongqi Railway has completed the bottom cover, and the non-navigable hole bridge has completed 4 cap pier caps. The foundation bored piles are in full swing, and 358 of the 414 water bored piles of the Chongqi Railway Yangtze River Bridge (Division 1) have been completed, and 450 of the 536 land bored piles have been completed. There are 2,138 bored piles for Chongming Bridge (Division 1), and 604 have been completed. Completed 23 piers.
In view of the low temperature weather, the project department takes the work of keeping personnel warm in winter, site anti-skidding, mechanical maintenance, etc., and strictly monitors the lifting and hoisting, and the installation and dismantling of high-altitude formwork. Do a good job in the quality acceptance of raw materials, control the temperature of concrete into the mold, and do a good job in winter maintenance of concrete to ensure the quality and progress of winter construction.
Jingjiang Minmin Sand Island is a small sandbar in the Yangtze River, and the south anchorage of the North Channel Bridge of the Zhangjinggao Yangtze River Bridge is deeply rooted in this small island. At present, the deep foundation reinforcement process has entered the sprint stage. In order to firmly support the construction of about 500,000 tons of anchor blocks, more than 2,000 piles need to be poured in an area of nearly 6,000 square meters, equivalent to the size of 15 standard basketball courts, and the deepest pile foundation reaches more than 50 meters. Due to the weak foundation and thick covering layer in the construction area, the pile foundation construction is like inserting chopsticks on the "tofu". In this regard, the CCCC Road Construction project team pioneered the deep foundation reinforcement scheme to overcome the construction difficulties and ensure the smooth progress of the project.
"It is not easy to work in a 24-hour sub-zero environment, and we have also taken a variety of measures, such as adopting a shift operation mechanism to shorten the time for personnel to work outdoors, and at the same time preparing ginger tea for everyone to resist the cold and keep warm. Shi Dandan, deputy secretary of the A3 standard party branch of the Zhangjinggao Yangtze River Bridge in Zhongjiao Road, told reporters. He introduced that the deep foundation reinforcement of the anchor deep foundation in the north channel of the Yangtze River Bridge in Zhangjinggao will be completed before the Spring Festival to lay the foundation for the next stage of construction.
On the day of the winter solstice, the world's largest span road-rail dual-purpose steel truss arch bridge, Changtai Yangtze River Bridge, and Tianxingzhou Special Waterway Bridge were successfully closed. Standing on the wide bridge deck completed by Helong, although the sun is shining, the cold wind is still biting. The reporter saw that the construction workers on the site were all wearing thick winter clothes. Just a few days ago, a blizzard enveloped the steel truss arch bridge into a world of ice and snow, which at first glance looks like a realistic version of the "Wandering Earth". After the snow stopped, the builders braved the continuous cold under freezing to quickly remove the snow from the bridge deck and trusses without missing the construction schedule. In the end, the bridge with a main span of 388 meters achieved a high-precision closure with an error of no more than 2 mm.
At present, 10 cross-river channels in Jiangsu are under construction simultaneously. In the middle of the river, under the freezing point, the builders braved the cold and made every effort to sprint to the annual goal and successfully completed it.
Correspondents: Meng Qinghu, Xu Fan, Wang Hao, Yangtze Evening News/Purple Cow News reporter Shi Xiaolei
Proofread by Faye Wong