| Summary: | In Indonesia, there are many rigid pavement roads that have already been
built. The existing method of rigid pavement design generally assumed the
subgrade is already in stable condition, so the design of rigid pavement is based
on the subgrade bearing capacity values that expressed by CBR (California
Bearing Ratio) or modulus reaction of subgrade. On soft soiled subgrade
condition, this existing method becomes inappropriate if the soft soiled subgrade
experiencing the excessive deformation due to over loading from vehicles. The
impact is pavement slab experienced internal forces that have to be reinforced. In
Nailed Slab System design, reinforcement calculation based on the internal forces
of the slab is needed.
This study ains to design the reinforcement of pavement slab based on
internal forces that worked due to the excessive vibration of soft soiled subgrade.
This study ains to create a relation graphic between maximum moment of the slab
with requirements area of reinforcement to simplify and accelerate the design of
reinforcement. Furthermore, the study conducted to determine the relationship
between slab thickness, concrete quality and reinforcement requirements.
The result showed that between maximum moment of the slab with
requirements area of reinforcement produce a linear relationship. So in
reinforcement design of pavement, the relationship graphic of maximum momen
of the slab and requirements area of reinforcement can be used to facilitate and
speed up the calculation. Furthermore, in the condition of small moment, the
smaller size of slab used, the reinforcement need will be reduced by 25%.
Otherwise, in the condition of high value of moment, the larger the size of slab,
then the reinforcemetn need will be increased by 8%.
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