There is little practical experience of asphalt
pavement in immersed tunnel in China. As a result, the service status of
asphalt pavement of 12 immersed tunnels in China and abroad, such as Hong KongZhuhaiMacao Bridge Subsea Tunnel and Busan Subsea Tunnel in South Korea,
etc.[KG-*3], are investigated, and the causes for diseases are analyzed based
on literature review, communication and enquiry, onsite
observation and onsite test. The results show that:
(1) The rut diseases of the asphalt pavement of immersed tunnels are not
prominent, the minimum temperature of the road surface is about 6 ℃ higher than that of the natural environment in the project area,
the maximum temperature is close to that of the natural environment, and the
service temperature usually does not exceed 40 ℃. (2)
Cracks are one of the most typical diseases of the asphalt pavement of immersed
tunnels, and the segment joints of immersed tunnel are weak links on the
asphalt pavement, where crack and damage often occur. (3) In addition, the
asphalt pavement of immersed tunnels has other diseases, such as poor
roughness, obvious attenuation of skidresistance, and
easy formation of pothole diseases at tunnel entrance. (4) For newlybuilt immersed tunnel, mechanical analysis should be carried out
according to the tunnel structural conditions, environmental conditions and
traffic conditions, and detailed design for the asphalt pavement at segment
joints should be carried out further. (5) The SMA with larger NMPS and
aggregate with better wearresisting performance are
suggested to use for the asphalt material. (6) The asphalt on the upper layer
of tunnel entrance should be characterized by good waterresistance.
WANG Tao, WANG Min, PENG Zhutao, XIAO Li
. Service Status and Disease Analysis of Asphalt
Pavement of Immersed Tunnel[J]. Tunnel Construction, 2020
, 40(S1)
: 429
-435
.
DOI: 10.3973/j.issn.2096-4498.2020.S1.057
