There are many technical difficulties in antireaction
construction of castinplace
onland final joints of immersed tunnels, i.e., multiple underwater operations,
complex procedures, and quality control. Therefore, a case study is conducted
on the Hanjiang rivercrossing immersed tunnel in
Yuliangzhou, Xingyang, China. No independent antireaction structure is
arranged, and the friction of the pipe joint is used as antireaction function.
The results demonstrate the following: (1) The friction coefficient between
pebble foundation bed and immersed tunnel and the friction coefficient between
pebble foundation bed and immersed tunnel considering the influence of backsilting are obtained by laboratory and field tests. (2) The
principle of friction antireaction of the final joint is studied, the land
final joint of the immersed tunnel with friction antireaction is developed for
the first time, the end antireaction structure is eliminated, prestressed
coarse reinforcement is adopted as a temporary connection measure, and selflubricating thrust bearing is set up to eliminate the shear force.
The engineering practice validates that the force and the tensioning amount of
the pipe joint meet the requirements, and the land final joint of immersed pipe
tunnel with frictionantireaction is safe and reliable.
XU Yu, LIU Minghu, XU Guoping, WANG Yong
. Key Technologies of Antireaction of Onland Final Joint
of Hanjiang RiverCrossing Immersed Tunnel in
Yuliangzhou, Xiangyang, China[J]. Tunnel Construction, 2023
, 43(S2)
: 451
-459
.
DOI: 10.3973/j.issn.2096-4498.2023.S2.049
