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structures to short-duration impulsive excitations resulting from above-ground
explosions is rarely studied and less well understood. Therefore, a
geosynthetics reinforced soil (RS) wall and a Reinforced Earth
w
(RE) wall
with precast concrete facings were constructed and tested in a collaboration
research project between the National University of Singapore and the
Ministry of Defense of Singapore for application in protective defense
structures. The walls were subjected to multiple blasts, and their extent of
damage was recorded and studied. Various instruments such as strain gauges,
total pressure cells, and accelerometers were used to record response during
the tests. The field data were analyzed and compared to numerical
FEM calculations.
The main objective of this test is to study the dynamic behavior of RS
and RE walls when subjected to multiple blasts of various magnitudes.
The effectiveness of residual soil in reducing the blast pressure and ground
shock as well as the effectiveness of geosynthetics in reinforcing the soil wall
are the main interests of this test. Comparisons are made between the
performance and failure modes of RS and RE walls. A brief account of
this comparative study was presented by Ng et al.
(2000), at ASCE
GeoDenver 2000.
Figure 1
Front elevation of RS wall facing blast with instrumentation plan (not to
scale).
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