Guiyang rail transit line 3 has successfully crossed the guiyang-guangzhou high-speed railway

On January 9, it was learned that, with the steady tunneling of "qianjin" shield tunneling machine, guiyang line 3 civil engineering project department of 14th bid successfully completed the construction task of running down the guiyang-guangzhou high-speed railway, declaring the first shield tunneling machine in guizhou province to successfully run down the guiyang-guangzhou high-speed railway.

It is reported that the guiyan-guangzhou high-speed railway is a major artery connecting guizhou and guangzhou provinces. More than 150 trains pass through the line every day. During rush hours, on average, one train travels at 250 km/h every three to four minutes.

Under line 3 of guiyang rail transit is 13.7 meters away from the guiyang-guangzhou high-speed railway, and the total length under line is 20 meters. Wear under your wide high-speed, belongs to the guiyang first phase of the rail transit line 3 extra-large safety risk source, not only to overcome the karst geological water-eroded cave, hard limestone, high pressure, fault zone and lateral wear the difficulties, such as housing projects to ensure the window period for driving at night, strictly control the excavated volume, surface subsidence in + / - 3.5 mm, to ensure absolutely safe to wear under the task.

It is reported that the high-speed railway in operation under karst geology belongs to zero foundation, zero data and zero experience in shield construction field in guizhou province. This successful trip through guiyang-guangzhou high-speed railway has accumulated valuable technology and experience for the construction of guiyang rail transit line 3, which is of great significance for speeding up the construction of guiyang rail transit line 3. Since September 19, guizhou province's first shield machine "qianjin" started, achieved a breakthrough in the construction of shield zero. The smooth down through the guiyang-guangzhou high-speed rail, once again created the shield crossing high-speed rail precedent.