China has made significant progress in tunnels and
underground engineering during the "13th FiveYear
Plan" period. Especially, despite of the sudden outbreak of COVID19 pandemic, remarkable achievements, both in quality and quantity,
were made in railway, highway and subway tunnel projects from 2019 to 2020. In
this paper, tunnel construction in railways, highways, subways and other fields
in China in the recent two years is compared. Analysis and discussions are made
on the tunnel projects under construction, such as Shiziyang tunnel of FoshanDongguan intercity railway, Xiaosanxia tunnel of ZhengzhouWanzhou railway and Shantou Bay tunnel, and the newly started tunnel
works such as Gaoligongshan tunnel of DaliRuili
railway, Tianshan Shengli tunnel and Shergyla Mountain tunnel of SichuanTibet railway from the aspects of engineering characteristics, challenges and corresponding technological
innovations. The technical progress made in the field of tunnels and
underground engineering in China in the recent two years and the construction
technical challenges that need to be further tackled in the future are
systematically summarized as follows: (1) According to the construction of
Muzhailing tunnel of WeiyuanWudu expressway, Qinling
tunnel of HanjiangtoWeihe
diversion project, Shantou Bay tunnel, etc., great breakthroughs and successful
applications have been made in control technology for soft rock deformation
under high ground stress, monitoring and treatment technology for hard rock
burst, and undersea tunnel construction technology in high earthquake intensity
areas, etc.; the manufacturing and application technology of domestic largediameter TBMs and irregularshaped largesection TBMs have reached a new level, and domestic shield machine
main bearings and completemachine remanufacturing
equipment have been successfully verified and applied; attempts have been made
to apply the shield TBM cruise tunneling technology based on highpressure water jet assisted rock breaking technology and the big
data mining technique in tunnel industry. (2) Breakthroughs in new rock
breaking methods, multifunctional hybrid TBM
equipment, and construction technology for maglev system tunnels based on low
vacuum pipelines are urgently needed for tunnel construction in extreme
environments or complex geological conditions such as crossriver or crosssea tunnels and SichuanTibet railway. (3) Aiming at the key challenges in tunnel engineering
under extremely complicated geological conditions, such as SichuanTibet railway tunnels, which can hardly be solved using the
traditional tunnel engineering concepts and methods, the concept of tunnel
field is put forward, and it is pointed out that the tunnel field
deconstruction and reconstruction theory and method should be gradually
established and improved, and the design concept for tunnels in extreme
geological conditions should be innovated; and the organic integration of
advanced technologies such as "Intelligent Construction" and
"5G" with tunnel and underground engineering should be promoted in a
targeted and systematic manner in combination with the complexity, variability,
and unpredictability of tunnel and underground engineering.
HONG Kairong
,
FENG Huanhuan
. Development and Thinking of Tunnels and Underground Engineering
in China in Recent 2 Years (From 2019 to 2020)[J]. Tunnel Construction, 2021
, 41(8)
: 1259
.
DOI: 10.3973/j.issn.2096-4498.2021.08.001
