"Pilot" Chongtai Yangtze River tunnel tunneling breakthrough of 1 km, successfully excavated to the bottom of the Yangtze River

According to Chongming District information Office, the "pilot" shield machine of Chongtai Yangtze River Tunnel of Shanghai-Chongming high-speed railway is currently digging from Shanghai Chongming to Taicang in Jiangsu province at a speed of 10 to 20 meters per day.

Under the operation of the construction personnel, the segment assembler inserts a segment into the designated position, so that the 500th ring segment of Chongtai Yangtze River Tunnel is successfully assembled. The shield tunneling takes the ring as the unit, and the 1 ring is 2 meters, that is to say, the "pilot" Chongtai Yangtze River tunnel has successfully broken through 1 kilometer, and has been dug to the Yangtze River, and is about to open the journey through the 10,000 meters of the river bottom.

At the end of April this year, by China's independent development, the world's largest diameter of high-speed rail mud-water balance shield machine - Shanghai, Chongqing and Chengdu high-speed rail Chongtai Yangtze River tunnel "pilot" started smoothly, facing Jiangsu Taicang direction officially opened the journey across the Yangtze River.

It is reported that the "pilot" is equipped with a tunnel intelligent construction system, with independent thinking, intelligent analysis, independent judgment of the "super brain", equipped with intelligent excavation, intelligent assembly, advanced geological forecasting, shield tail seal safety warning, equipment status online monitoring and other domestic leading intelligent innovation technology, in the "manned, unmanned" way of independent excavation. For example, in different formations, the intelligent construction system will automatically calculate the amount of power needed to drill, and then automatically adjust.

At present, the "pilot" shield machine has reached the bottom of the Yangtze River, next, will be in the Yangtze River underwater section of the single head digging 10,000 meters, has passed through the Yangtze River knife carp protection area, water transfer operation area, Baimao Sha north waterway, the main channel and other environmentally sensitive areas, and finally arrived in Taicang, Jiangsu, the overall construction environment, geological conditions are extremely complex. After the completion of the tunnel, Chongming via Taicang to Shanghai Baoshan station is expected to take only 17 minutes.