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Have you ever seen a tunnel dug more than 300 meters underground, or a tunnel specifically designed to divert water? On February 1, "Sichuan News Network" broadcast "New Year Grassroots Walk", aimed the camera at a group of "water pilots" rooted in Daliang Mountain.
In the program, we met an "old acquaintance" - Zheng Bin, the person in charge of the Taihe tunnel project. He told us, "This mud gushing and silt has made me miserable!" "It turned out that in November last year, the construction face of the exit of the Taihe tunnel suffered many large-scale mud inrushes, and a large number of finely fragmented sand and gravel accompanied by groundwater blocked the entire tunnel.
The situation was serious, and the construction had to be suspended. After investigation, this construction face turned out to be a fault zone, which happened to be in a riverbed-like location, with a lot of sand and gravel and water gushing, and it was almost impossible to dig forward. Lao Zheng hurriedly organized the construction team, the design unit and the owner to discuss countermeasures. To move forward or backward, a choice must be made.
After repeated discussions, a new plan of "retreat as advance" was proposed, and the construction side was set back 39 meters, and the route of the tunnel was readjusted. At present, the Taihe tunnel is advancing at a rate of 4-5 meters per day.
Lao Zheng said that it was difficult to make the decision to retreat at that time, but their determination to move forward did not shrink at all. At present, there are only 200 meters left in the tunnel to be penetrated, and he will continue to fight day and night with everyone to overcome difficulties. It is expected that in 2025, the second phase of the Daqiao Irrigation Area will be completed, which can supply water to Xichang, Dechang, Mianning and other places every year500 million cubic meters to nourish the rich Anning River Valley.
Click to see more: Sichuan News Network丨The New Year goes to the grassroots level, and there are a group of "water pilots" in Daliang Mountain