To study the mechanical performance and deformation
mode of new fabricated corrugated steel primary support composed of the
corrugated steel plate and square steel pipe, the deformation, strain, and
earth pressure of the structure are tested and analyzed through scale test. To
investigate the stress distribution and bearing capacity of the structure under
compression, a threedimensional finite element numerical
simulation model is established. The effects of soil properties and structural
geometric parameters on the stress state of lining structure are investigated
by varying parameters, such as the thickness of the corrugated plate and the
elastic modulus of soil. The findings are as follows: (1) The bearing
performance of the square steel reinforced corrugated steel primary lining
structure remains comparable to that of the traditional flexible pipe culvert.
When the total vertical load is about 236.24 kN, 10.01 mm vertical shrinkage
and 9.18 mm horizontal expansion occur. The maximum circumferential compressive
stress produced by the corrugated plate is 24.24 MPa, and the stress level is
low. (2) The structure′s ultimate bearing capacity
under loading mode is approximately 1 411 kN. (3) During the loading process,
square steel produces more internal force than corrugated steel plate, and has
better load diversion and strengthening effect. (4) Soil properties have a
great influence on the stress level of square steel, whereas corrugated plate
thickness has little influence on the overall mechanical performance of the
structure.
SUN Xibo
,
LIU Baodong
,
LI Chunhao
,
LI Tiesheng
,
ZUO Xiao
. Model Test and Numerical Simulation of Primary Tunnel
Support Structure Using Corrugated Steel[J]. Tunnel Construction, 2021
, 41(12)
: 2058
-2065
.
DOI: 10.3973/j.issn.2096-4498.2021.12.005
