As the trend of underground space moves toward large
space, it is often difficult to form effective support in a short period of
time for the excavation and support of large underground space using
traditional support. In order to solve the problems of too long primary support
construction time and insufficient early morning strength, the corrugated steel
support is introduced. Based on the fullscale corrugated steel
structure joint model mechanical performance test, the structural strain, bolt
axial force, structural deflection, and bending stiffness of the three joint
types such as flat flange, back reinforced flange, and lap joint are studied.
The results show that the initial flexural stiffness, initial bending moment of
attenuation of bending stiffness, and decay rate of the three joint types of
corrugated steel primary support are different. The initial flexural stiffness
of the lap joint is the largest, the attenuation of the bending stiffness of
the flat flange joint is the maximum, and the attenuation of flexural stiffness
of the backreinforced flange joint is the minimum.
HUANG Mingli, SUN Tong, ZHANG Yanqiu, SONG Yuan
.
Experimental Research on Mechanical Properties of
Corrugated Steel
Structure Joint of Primary Support
[J]. Tunnel Construction, 2021
, 41(S2)
: 43
-49
.
DOI: 10.3973/j.issn.2096-4498.2021.S2.005
