The numerical results of segmental joint of shield
tunnel often cannot accurately reflect the actual force and deformation process
of the joints. Hence, a threedimensional refined numerical model
of segmental joint of Sutong GIL project is established, in which solid
elements are used to simulate the concrete, bolts, sleeve, gaskets,
etc.[KG-*3], beam elements are used to simulate the reinforcements, and preload
are applied on the bolt. Based on the numerical model, the calculation is
carried out and compared with the fullscale
compressionbending test to verify its accuracy. The numerical model is used to analyze the
influence of bolt connection state on the bending performance of the joint. The
results show that: (1) The threedimensional refined
model of the joint can reflect the deformation law under compressive bending
loads, and it has good calculation accuracy. (2) Under positive and negative
bending moments, the joint is prone to opening and vertical deformation when
there is no bolt; the joints with/without bolt has a greater impact on the
joint opening and vertical deformation, and the influences are related to the
magnitude of axial force and bending moment under positive bending, while the
difference between influence of joint with bolt and that of joint without bolt
is small and basically unchanged under negative bending. (3) When the joint is
connected by oblique bolts, the influence of the joint with/without bolt on the
bending stiffness of the joint under positive bending is greater than that
under negative bending.
ZHANG Li
,
FENG Kun
,
HE Chuan
,
XU Peikai
,
ZHANG Jingxuan
,
LIAO Chutian
.
Threedimensional Refined Numerical
Simulation of
Segmental Joint of Shield Tunnel
[J]. Tunnel Construction, 2020
, 40(8)
: 1169
-1175
.
DOI: 10.3973/j.issn.2096-4498.2020.08.009
