Statistics and Analysis of Shield and TBM Tunnels in China by the End of 2021.

Tunneling by means of shield or TBM is by now the advanced construction method, and the domestic application of them is relatively late compared with other countries. With the rapid development of national economy, other shield or TBM is progressed unprecedently, and will come to a peak in near future. This paper conducts a statistics of the shield tunnels in service, under construction and in planning from 2007 to 2021, and prospects the development of both tunnels. Shield and TBM tunneling reduce labor intensity, raise the quality and efficiency of tunneling, enhances work safety and improve working conditions, which are the effective way to alleviate the shortage of human resources and a long term solution to promote industrial upgrading. The modern and scientific shield and TBM methods will see broad application in China. [ABSTRACT FROM AUTHOR]