The longest shield tunnel section of Zhengzhou Metro Line 7 has been completed

On the morning of September 8, the left line of shield tunnel from Longmen Road station to Zhangjiacun Station of Zhengzhou Metro Line 7 was successfully opened. So far, this area between the left and right lines through. As the longest shield tunnel section of the whole line, longzhang tunnel section is fully through, demonstrating the construction strength of the enterprise, and also creating conditions for zhengzhou Metro Line 7 to accelerate the progress and complete as soon as possible.

The first phase of Zhengzhou Metro Line 7 has a total length of 26.81 km, and The Seventh Engineering Bureau of China Railway Undertakes the construction task of 8.294 km, among which the shield section from Longmen Road Station to Zhangjiacun Station with a length of 1650 meters is the longest section of the whole line. On the basis of the right line connecting on August 10, the left line connecting between the two areas has been completed this time. The first phase of Zhengzhou Metro Line 7 project construction led to in-depth.

Since the shield construction started in Longzhang section on April 9, the construction personnel have paid close attention to technical guidance, strengthened safety management and quality control to ensure the construction schedule by participating in the special labor competition of "Learning party history and Opening a New Bureau to Accelerate the Pace of Building a Benchmark Enterprise to present a gift to the 100th Anniversary of the founding of the Party" held by China Railway Seventh Engineering Bureau. On range across both the construction of the subway line 4, small spacing between the two, turns the soil thin on the ground, high security risk, construction personnel has carried on the risk identification and control in advance and strengthen the monitoring measure, set up reasonable tunneling parameters, control of shield advancing speed, optimization of shield cutterhead torque, effectively prevent the ground subsidence, to ensure the construction safety. 7.20 and 8.23 in the face of the rainstorm processes to more, the new crown outbreak, the serious situation of emergency in the fighting and self-help, the implementation of the work construction of the whole trade, personal protection, strengthening the management of entrance guard, science field strictly sanitizers, 24 hours a day, turn on each other and epidemic prevention measures, such as passive to active, and the construction loss to a minimum, ensures that the double line, It provides reliable guarantee for subsequent construction.