To avoid overlarge difference settlement of the buried
section, pipe E1, and pipe E2 at connection between island and tunnel of
ShenzhenZhongshan link, and overlarge excessive shear of the shear key and
the excessive internal force of the pipe joint, prereinforcement
measures for the immersed tube foundation of the connection between island and
tunnel are conducted, the foundation parameters of different sections are
studied, and the rational prelift value of pipe E1 is
analyzed and calculated. The key parameters are obtained through laboratory and
field tests and largescale threedimensional finite element analysis is carried out to study the
stress and settlement characteristics of the pipe. According to the laboratory
test, the deformation modulus of 1.0 m thick crushed stone cushion with 30 kPa
preloading is determined to be 25.4 MPa in 0~30 kPa section and 8.9 MPa in
30~110 kPa section, respectively. According to the field test, the deformation
modulus of the block rock cushion is 50 MPa. Based on the above parameters, the
finite element analysis is conducted, and finally the reinforcement measures
for the immersed pipe foundation are determined and the prelift value of the pipe is determined to be 70 mm.
XU Yu, XU Guoping, FU Baiyong, HE Xiao
.
Foundation Settlement Control Analysis of Immersed
Tunnel at
Connection between Offshore Artificial Island and Tunnel
[J]. Tunnel Construction, 2021
, 41(S1)
: 338
.
DOI: 10.3973/j.issn.2096-4498.2021.S1.043
