Position£ºHome > Technical visits
Technical visits

Visa & Invitation letter 

Attendees from most countries will be required to obtain a visa to enter the People's Republic of China; Attendees can apply 
for a Chinese visa through 

a travel agency or directly at the nearest Chinese embassy.   

Once you have paid for the conference registration, we will issue you an official invitation letter (also called Authorised Notification Form for Visa Appl-

ication) to assist you to obtain a visa to China. The invitation letter will state the conference name, the duration of the conference, your detailed corre-

spondence that will be extracted from your enquiry. Please contact Dr. 

Xuewei LIU on liuxw@whrsm.ac.cn using subject 'Invitation letter for TBM DiGs 2017'.

Technical Visits

Vist A: Rectangular TBM construction site

Rectangular TBM (RTBM) construction site is located in China Railway Engineering Equipment Group Co., Ltd. (CREG), Zhengzhou, China. It takes 2.5 hours by train from Wuhan. RTBM, developed and manufactured by CREG, is the first time to be used to construct undergrounding parking in China. RTBM cuts a square face rather than a circular one by conventional TBMs. Moreover, as a trenchless way to excavate short-distance tunnels at shallow depths, its space utilization has increased by 20% in comparison to that of circular TBMs. 


Vist B: Wuhan Sanyan Road Tunnel

Wuhan Sanyang Road Tunnel located between the Wuhan Yangtze River bridge and the Second Wuhan Yangtze River Bridge, which is the first highway with metro tunnel which crossing through the Yangtze River, will be the part of Metro Line 7 and main road for connecting two towns, namely, Wuchang and Hankou in urban area of Wuhan City, China. The diameter of Sanyang Road tunnel is 15.6m, which is the largest shield tunnel in China. Construction had started in 2016 and tried to finish in 2018. It takes about 7 and 4 minutes to cross the Yangtze River by car and subway using the tunnel, respectively. Because the geological condition in Wuhan City is much complicated, the layer of the left and right tunnels has the characteristics of alternate hardness and large difference in longitudinal load.