The other day，The domestic super-large diameter slurry balance shield machine is jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau.“New crossing number”Successfully completed the assembly of 1139 ring segments，Advance 288 rings in one month，The footage reached 576 meters.，Average daily footage 19.2 meters，It has created the fastest record of fully prefabricated super-large diameter slurry shield in China.。

December 2021，“New crossing number”Smooth start of shield machine

It is reported that，“New crossing number”The Shanghai Airport Link Line Bid 2 Project is the first small spacing project in China at present.、Large diameter shield tunnel with long distance parallel high-speed railway;，The geological conditions are complex，Surface construction（Structure）There are many buildings，The technical difficulty is great、High construction risk。

According to the characteristics of the project，Railway Construction Heavy Industry Tailor-made 14.02m super-large diameter slurry balance shield machine“New crossing number”，Equipped with a telescopic camera、Box culvert automatic fine adjustment device, etc.，Adopt mature overall independent design and system integration technology，Equipped with large flow muddy water scouring circulation system、High-precision gas-liquid pressure balance control system、Radial thick mud injection compensation system，Greatly improve the geological adaptability of shield machine，Make sure the equipment is safe、Fast、Efficient tunneling。

Box culvert fine adjustment device in operation

Among，Box culvert fine adjustment device independently developed by China Railway Construction Heavy Industry，Adopt 3DVisual inspection technology，Through electro-hydraulic proportional and six-degree-of-freedom control strategy，Uide automatic assembly of mechanical arm，The high-precision assembly and positioning adjustment of the box culvert are realized，It greatly improves the construction efficiency of the whole prefabricated tunnel.。

The tunnel has been formed

During tunneling，Experienced repeated epidemics，Research and development of roadheader technology in China Railway Construction Heavy Industry、The service team always sticks to their posts.、Overcome difficulties。Everything is based on meeting the actual needs of customers，Make every effort to ensure smooth and efficient operation of equipment。After the completion of trial tunneling，Relying on the advantages and characteristics of regional services at the present stage，Regular inspection of the East China region of the Service Department，Take the initiative to communicate，Respond quickly to construction equipment problems，For“New crossing number”Create the fastest monthly footage record in China and provide technical support。