On December 10, the length of the liaohe shield tunnel tunneling through the eastern route of the china-russia natural gas pipeline (changling-yonker) exceeded 600 meters, completing one third of the overall progress.

At present, dalian metro line 5 cross-sea big shield "haihong" has been smoothly tunneling 936 meters, is now average monthly speed of 90 meters. The total length of the tunnel is 2,870 meters. It has been 1/3 completed since the launch of the tunnel on January 18 this year.

"Guangdong-hong kong-macao greater bay area underground space conference and the fifth (shenzhen) urban underground space and integrated pipe corridor technology innovation forum" will be held in shenzhen from December 5 to 6, 2019. Leaders of shenzhen municipal housing and construction bureau, academician zhou fulin of Chinese academy of engineering, academician wang fuming and guests of relevant enterprises attended the forum.

On December 3, in the morning, wuhan metro line 8, street mouth station ~ ma fangshan station, left line No.2, shield tunneling machine cutter began to turn, marking the construction of wuhan metro line 8, the last tunnel officially began to dig. Between yaokou station and mafangshan station, it starts at the intersection of future city hotel on lousi road, extends southward along lousi road, and stops at the intersection of lousi road and hongda lane. The line is completely laid along lousi road.

At 10:58 on November 30, with the roar of firecrackers, the second TBM "fushan" of Qingdao metro line 4 civil engineering area of China railway construction bridge engineering bureau group co., ltd. was successfully launched, marking the beginning of the second journey of tunneling in lijiu section of Qingdao metro line 4.

On the afternoon of November 24, the right line between the guantang access section of hefei metro line 5 and the jiqiao road station area was smoothly transited.