Construction of Shanghai Beiheng Road New Construction Project II Standard Section Shields Originating Well Floor Pouring Completed

On May 6, the pouring of the bottom of the well of the shield originating from the new construction project of the Beiheng section of the Beiheng tunnel under the construction of the tunnel share Shanghai tunnel was completed, creating conditions for the subsequent large-scale diameter shield structure to originate.

The largest diameter shield in Shanghai is about to go down.

The total length of the North Cross Road II section is 7788.77 M(6426m in the tunnel section). A 15.56 M diameter oversized muddy water gas balance shield is used for excavation, which will refresh the diameter of the tunnels under construction and built in Shanghai. The shield originating well-Zhongjiang Road work well is located in the long wind green space south of the intersection of Guangfu West Road, Zhongjiang Road, Putuo District. The work well outsourcing dimension is 25.4 M × 24.4 M, and the excavation depth of the foundation pit is 28m; The working well enclosure structure adopts an underground continuous wall with a thickness of 1.2 M and a depth of 51 M, with a maximum steel cage weight of 80t. The thickness of the bottom of the working well of Zhongjiang Road reached 1.8 M, and the amount of concrete poured was 1200 square meters.

It has been five months since the excavation of the work well on December 25, 2015. The Shanghai Tunnel of the tunnel has safely and efficiently completed the excavation of the foundation pit and the reconstruction of the structure, which is ready for the subsequent large-scale diameter shield.

Project # 1 and the most difficult section

The Northern Crossing is the second major artery in the East-West direction of Shanghai. The II standard built by the Shanghai Tunnel is the most difficult section of the entire project. It will not only refresh Shanghai's tunnel construction record again. In addition, the emergency curve method(a minimum turning radius of 500 meters) continuously passes through Shanghai Central City, Metro Lines 3, 7, 11, and 15, and has crossed the Suzhou River Flood Control Wall four times. The screening plant crosses the subway line 13 on the foundation pit.

It has been five months since the excavation of the work well on December 25, 2015. The Shanghai Tunnel of the tunnel has safely and efficiently completed the excavation of the foundation pit and the reconstruction of the structure, which is ready for the subsequent large-scale diameter shield.

Project # 1 and the most difficult section
The Northern Crossing is the second major artery in the East-West direction of Shanghai. The II standard built by the Shanghai Tunnel is the most difficult section of the entire project. It will not only refresh Shanghai's tunnel construction record again. In addition, the emergency curve method(a minimum turning radius of 500 meters) continuously passes through Shanghai Central City, Metro Lines 3, 7, 11, and 15, and has crossed the Suzhou River Flood Control Wall four times. The screening plant crosses the subway line 13 on the foundation pit.