To address the problems of small reinforcement spacing
and poor concrete pouring in the sidewallfloor joints of underground
structures, two optimization schemes for modular reinforced joints in the form
of steel trusses are proposed. In this paper, three scaleddown members with a geometrically similar ratio of 1∶3 are designed to perform static unidirectional loading test to
study the differences in mechanical properties and crack development between
the modular reinforced joints and the reinforced binding joints. The test
results show the following: (1) Under the same load, the tensile stress of the
main reinforcement at the variable crosssection of the
reinforced modular joints and the traditional joints is basically the same, or
even smaller. The reinforced modular joints can achieve the same mechanical
properties as the traditional joints. (2) As the external load increases, the
initial crack location and crack width of the modular reinforced joints and the
reinforced binding joints are roughly the same, which means that the initial
cracks appear on the outside of the sidewall(all cracks), and the width sizes
are approximately 0.05 mm. (3) Eventually, the joints crack expansion paths are
basically the same, and the maximum crack widths on the sidewalls and the
outside of the floor are at approximately 0.25 mm.
WANG Tian
. Experimental Research on Sidewall-Floor
Reinforced Modular Joints of Underground Structures[J]. Tunnel Construction, 2023
, 43(S1)
: 121
-130
.
DOI: 10.3973/j.issn.2096-4498.2023.S1.014
