Recently，By China Railway Construction Heavy Industries、Mud water and earth pressure dual-mode shield machine jointly built by South China Construction and China Railway 18th Bureau“Tiebing Guanghua No.18”Fangying open-cut section in the sixth work area of Guangzhou East to Huadu Tiangui Intercity Project～The section of Yinghu Line Station started smoothly.。The excavation diameter of the equipment is 8..84 meters，The length of the whole machine is about 133 meters.，The weight of the whole machine is about 1400 tons.，The installed power is about 4500 kW.。

“Tiebing Guanghua No.18”Departure site

Fangying Open Excavation Section in Work Area 6 of Guangzhou East-Huadu Tiangui Intercity Project～The total length of the shield section of Yinghu Line Station is 655.3 double linear meters。The shield machine mainly passes through silty fine sand.、Medium coarse sand、Gravel sand、Silty clay and other strata；Complex geological conditions in the interval，It is located in the strong development area of karst，Karst cave rate up to 45.97%，And that underground wat is rich，The tunnel needs to pass through old residential buildings.、Pond，The construction is extremely difficult。

According to the engineering characteristics of the project,，The R & D technicians of Railway Construction Heavy Industry have designed the shield machine pertinently.，An advanced geological prediction system is provided.、Advance grouting system，The karst cave in front of the tunnel face can be detected and treated；Adopt composite freezing cut disc，Equipped with synchronous two-fluid grouting system、Synchronous secondary grouting system and thick grout injection system，It can improve the problem of ground subsidence caused by shield tunneling.。

Initiated this time“Tiebing Guanghua No.18”The responsible party of the shield machine shall open the excavation section～Excavation task of section of Yinghu Line Station，Orderly cooperation between China Railway Construction Heavy Industry and China Railway 18th Bureau、Promote all kinds of work efficiently，It took only 38 days to complete the assembly of shield machines with high standards.、Commissioning work，It's a strong guarantee“Tiebing Guanghua No.18”Smooth start of shield machine。