Recently，Jointly built by China Railway Construction Heavy Industry and China Railway 11th Bureau，Large diameter single shield for Fuzhou Binhai Express LineTBMHelps the right line of Zhenfengshan Tunnel run through smoothly，Implementation 4.Elephant Hill Tunnel, 53 km long、1.The 5-kilometer-long Zhenfengshan Tunnel is the first to be completed。

Railway construction heavy industry single shieldTBMAssist tunnel penetration

The Daxiangshan Tunnel and Zhenfengshan Tunnel are completed this time，It is a rare long-distance and large-diameter urban rail transit in China.TBMMountain tunnel under construction。The geological environment of the tunnel section is complex.，Extremely hard rock with long distance crossing and full section（The maximum strength of the rock exceeds 220 MPa）、Many places pass through fault fracture zone and joint dense zone、Crossing Shenhai Expressway、Adjacent to the existing railway and viaduct and many other construction problems，The construction difficulty is greatly increased.。

In order to adapt to the changes of complex geology and surrounding environment,，In the owner、With the strong support and help of experts and construction units，China Railway Construction Heavy Industry Co., Ltd. completes single shieldTBMExtra heavy duty cutterhead、High performance host、Quick slag tapping system、Multi-level reinforcement measures and other targeted design，Meet the requirements of long-distance hard rock rapid tunneling、Efficient transportation of dregs、Rapid backfilling and other requirements。

CCTV special report

Since the start，Single shieldTBMOvercome the narrow site，Underpass Peak Reservoir、Railway、Shenhai Expressway、Elevated、Shallow buried section、Fault fracture zone、Poor conditions such as dense joint zone，Gnaw down the whole line one after another“The hardest bone”，Conquered one construction after another in the mountains.“Natural barrier”。Under the careful organization and construction of the 11th Bureau of China Railway，Railway construction heavy industry single shieldTBMCreated the Fuzhou Binhai Express LineTBMMaximum single-day driving footage 23.The footage record of 4 meters and the maximum footage of 450 meters in a single month，It has also created 2000 rings of single-line continuous tunneling.“Fragmented、Zero leakage”An industry record，Overcome many frontier technical problems in China，Attract CCTV special reports。

Single shieldTBMFactory acceptance

China Railway Construction Heavy Industry Co., Ltd. provides all-round protection services for equipment construction，It effectively solves the problem of small starting site.、Through the fault fracture zone、Underpass important buildings and structures、Long distance hard rock tunneling、A series of construction problems such as efficient rock breaking，It provides a strong guarantee for the smooth implementation of the tunnel section and the project.。