Shenguan intercity chimelong station to panyu avenue station left line shield tunnel through

On April 13, the 3970-meter shield tunnel between changlong station and panyu avenue station was successfully completed. This is the first major node of the project since it fully resumed work after the COVID 19 outbreak, and construction of this section of the tunnel is 97% complete.

The length of the project pipe section is 11.03 kilometers, which is the leading section of the shenzhou-dongguan intercity railway. The project is located in guangdong province, which is known as the "geological museum". The geological situation is complicated.

The tunnel through the main road, high voltage tower group, jinshanhu, xinguang fast bridge pile foundation, guangzhou metro line 3 lam tang substation and a variety of underground pipelines. Among them, the parallel length with guangzhou metro line 3 is up to 750 meters, the nearest net distance is 12 meters, the ground subsidence control requirements are high, the shield tunneling risk is high.

To cope with complex geology and equipment failure influence on construction efficiency, the project department in conjunction with the university of Shanghai, the complex and varied geological conditions cutters and cutter wear monitoring is studied, and developed a set of complex formation of shield cutter head grew up distance tunnel deformation and dynamic visualization tool wear monitoring technology, by setting up a professional tool maintenance shift, establish maintenance parameter, different strata according to the different material dao ring, set different starting torque, at the same time, according to the cutting tool damage and dismantling check, better understand the cause of the tool damage, greatly improve the shield construction schedule.

It is reported that the right line shield tunnel from the changlong station to the panyu avenue station and the left line shield tunnel from the panyu avenue station to the exit section will be opened in April.