congratulations to xinglu technology for participating in the supply of the photoelectric indicator
时间：2019/11/15 10:48:10 浏览：184次
the qinling zhongnanshan highway tunnel is a control project of the baotou-maoming line of the national expressway network, and is also an important part of the xi’an-ankang expressway in shaanxi’s "three vertical, four horizontal and five radiation" highway network. with a total length of 18.02 kilometers, its construction scale ranks first in the world and the largest road tunnel in china. its mileage is second only to norway's 24.51 kilometers long lerdo road tunnel. it is the first ultra-long tunnel in asia and the second in the world. in january 2001, the deepest part of the qinling zhongnan mountain sounded the first shot of the construction of this extraordinary tunnel. during the construction process, the builders continued to overcome construction problems such as faults, water gushing, and rock bursts, and major technical issues in operations such as ventilation, fire, and monitoring, which brought my country's highway tunnel construction technology to a new level.