construction of the most geologically complex tunnel in the shanxi section of the xiongxin high-speed railway begins
2024-09-22
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on september 20, the no. 1 inclined shaft of changqing tunnel of the 3rd section of the xiongxin high-speed railway in shanxi province of china railway 12th bureau group second company was completed. this is another breakthrough made by the builders after the no. 2 cross tunnel of the tunnel was completed on august 30, marking that the changqing tunnel, the most geologically complex tunnel in the shanxi section of xiongxin high-speed railway, has fully entered the main tunnel construction stage. since then, all tunnels in the 3rd section of the xiongxin high-speed railway in shanxi province have entered the main tunnel construction, with a cumulative excavation of more than 10,000 meters.
as the first high-speed railway in shanxi province with a designed speed of 350 kilometers per hour, the xiongxin high-speed railway is 342.67 kilometers long and connects xiongan new area and xinzhou city. it is an important horizontal channel of the "four vertical and two horizontal" regional high-speed railway transportation network of xiongan new area, and an important part of the beijing-kunming channel, the main channel of the country's "eight vertical and eight horizontal" high-speed railway.
section 3 of the shanxi section of the xiongxin high-speed railway is located in wutai county, shanxi province. the main line is 26.5 kilometers long and mainly includes 3 tunnels, 3 bridges, and 3 sections of roadbed. the changqing tunnel is 10,747 meters long and has a maximum burial depth of 690 meters. it is a key and difficult control project for the entire line. during the construction, the builders organized the construction based on the principles of "short footage, weak blasting, strong support, fast closure, and frequent measurement". according to the results of advanced geological forecasts, advanced peripheral grouting was used to reinforce the surrounding rock and reduce the permeability of the surrounding rock. at the same time, the dual prevention mechanism of risk classification control and hidden danger investigation and treatment was strictly implemented, the risk control responsibilities of personnel at all levels were consolidated, and precise policies were implemented to eliminate construction risks in a targeted manner, ensuring the safe and smooth progress of the construction. reported by shanxi daily reporter jin shuani and correspondent zhang dingliang xingyue
