Compared with the completed Weiqi Road Yangtze River Tunnel, the geological and hydrological conditions of Weisan Road Tunnel are more complicated. There are soft soil, common clay, sand, gravel and bedrock in the stratum, and its complexity is prone to sudden water inrush and quicksand, which will lead to stratum collapse in serious cases. Especially the cornerstone of the river bottom, its strength is equivalent to four times that of concrete. Therefore, the two shield machines have replaced more than 1000 hobs, each weighing 267 kg.
The penetration of the "double-line" shield tunnel indicates that the domestic large-diameter shield machine independently developed by CCCT has withstood the severe test, which indicates that China has made a major breakthrough in the development of large-caliber and complex technology shield machines, and this market has since broken the foreign monopoly. It is reported that this super-large shield machine independently developed by Zhongmin has gone abroad. At present, 40% of orders come from customers in Japan and Singapore.
Compared with similar foreign tunnel boring machines. Not only can it actively cope with complex geological and hydrological conditions such as sandy pebble, clay, mudstone and sandstone and ultra-high water pressure, but it also pioneered a number of advanced technologies and reached the international leading level.
China's first composite tunnel shield machine with independent intellectual property rights is the largest in China and the most advanced technical product in the world.
Cutter heads are equipped with 7 17 knives, and some shield machine cutterheads with higher number of knives rank first in China.
The excavation distance of the initial cutter head is three times that of the existing tunnel shield machine under similar geological conditions;
Creative setting of push-out hob prolongs the driving distance and is the first in the world;
Driven by the mobile driving part, the cutter head with a total weight of over 1000 tons can be telescopic 100mm, which greatly shortens the tool changing time. This technology is first used in super-large diameter tunnel boring machine.
The special segment lifting and handling system, cutting piece lifting system, mud pipe lifting system and driving cylinder for tunnel boring machine with a diameter of 14m are all the first in China.
The visual camera system of humanoid brake and cutter cutting surface in saturated diving operation has made the first breakthrough in the world. ...
It is reported that Tianhe shield machine has won 5 international pioneering technologies, 9 national invention patents and 9 utility model patents, and thus won the first major equipment and key components in Jiangsu Province in 20 13 and the first prize of Jiangsu Science and Technology Award in 20 14.
1825, Mark brunauer used a rectangular shield machine with a section height of 6.8m to build the first shield tunnel under the Thames in London for the first time. After 190, CCCC excavated a world-class project at the bottom of the Yangtze River with a shield machine with a diameter of14.93m independently developed and manufactured in China. In the world, machine building is creating miracles every day. China's heavy weapon "Tianhe" adds a new "Ding" to the domestic super-large shield machine family.