December 16，Jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau 14m super-large diameter shield machine“Garden Dream”Offline in Changsha No.2 Industrial Park of Railway Construction Heavy Industry，Will be applied to“The First Tunnel of China's Urban High-speed Railway”——Construction of Suzhou East Tunnel of Newly-built Nantong-Ningbo High-speed Railway。

The equipment is also carried.“Synchronization of pushing and splicing+Ynchronous double-liquid grouting+Ynchronous assembly of integral precast box culvert”Complete set of advanced technology，It is the first application in the large diameter shield equipment in China.，It will comprehensively improve the safety of shield construction and the quality of formed tunnels.，Construction efficiency can be improved by 30 percent%。

Equipment Offline Unveiling

It is reported that，Suzhou East Tunnel is located in Suzhou Industrial Park.、Wuzhong district，Total length 15.565 kilometers，It is the highest construction standard in China at present.、The longest high-speed rail city tunnel with a speed of 350 kilometers per hour，Be known as“The First Tunnel of China's Urban High-speed Railway”。

Among，11.Construction of 82 km shield section，It needs to cross three railways such as Beijing-Shanghai high-speed railway.、2 subway lines、4 rivers and lakes、20 roads and other complex urban environments，And traverses the soft soil for a long distance.、High water pressure、High Permeability Sandy Formation，The maximum buried depth is 58 meters.，Maximum water and soil pressure exceeding 6 bar，Overall tightness of shield equipment、High reliability and other requirements。

In order to ensure the adaptability and high efficiency of shield machine in complex strata，The team of China Railway Construction Heavy Industry and China Railway 14th Bureau has made full use of the technical achievements and successful experience accumulated in the construction of crossing rivers, lakes and sea cities over the years.，Through targeted and innovative design，Built“Garden Dream”Slurry balance shield machine。The excavation diameter of the shield machine is 14..81 meters，The total length is 134 meters，Total weight 4200 tons，The total installed power is 10000 kilowatts.。

“yuanmeng”Shield machine

It is understood that，“Garden Dream”Not only equipped with a telescopic main drive、Cutter head and cutter monitoring system、Ynchronous double-liquid grouting equipment、High pressure shield tail、Ynchronous assembly of integral precast box culvert、Box culvert fine adjustment and many other domestic leading core technologies，It has also successfully applied the self-developed“Uper-large-diameter shield pushing and assembling synchronous”New technology，And that shield advance and the segment assembly are simultaneously carried out.，And traditional shield“Advance、 Stop 、Assemble”Compared with the construction process，Efficiency will increase by 30 percent%To 40%。

The naming and appearance design of the shield machine also have the regional characteristics of Suzhou.。Name“Garden Dream”，A pun，Implied“The city of gardens”Relying on large shield technology to open up the underground high-speed railway network，Greatly reduce the ground development of the core urban area“Interference”，To realize a dream；The cutterhead is creatively painted with double pliers waving.“Blue collar”Hairy Crab，It implies that the shield machine can quickly adapt to the geological environment with developed water system.，And realize efficient tunneling。

Tongyong High-speed Railway is a national railway.“Eight vertical and eight horizontal”The high-speed railway network is an important part of the coastal corridor.，From Nantong West Station of Yancheng-Nantong High-speed Railway，To the south through Suzhou, Jiangsu Province，Jiaxing City, Zhejiang Province、Ningbo City，Introduction of Ningbo Station of Ningbo Hub，The line is 301 kilometers long.，The design speed is 350 kilometers per hour。After its completion，It will greatly shorten the space-time distance between the major cities in the core area of the Yangtze River Delta.，To optimize the layout of the Yangtze River Delta high-speed rail network and even improve the national transportation network.、Promoting the Development of Higher Quality Integration in the Yangtze River Delta、It is of great significance to realize complementary advantages of regional resources and comprehensive and coordinated development.。