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In order to cope with increasing traffic intensity, road widening
becomes an integral part of upgrading the Kuala Lumpur-Karak
Highway. The road widening project requires that in some stretches
where the boundary constraints do not permit construction
of side slopes, earth retaining structures will be constructed
in order to maintain the required width along the highway
and yet ensuring stability to the structure.
The selection of types of retaining structures
was based most importantly on economic viability and stability
of the structure. In addition, ease of construction, mobilisation
and construction rate were other important criteria considered
to minimise disruption of passing traffic.
The above key criteria were complied with
by the construction of Anchored Earth retaining wall. Due
to easy mobilisation and speed of construction, significant
economic advantage was achieved compared to conventional reinforced
concrete wall. The wall was constructed to a maximum height
of 6.75m above a gentle slope and was completed within schedule
to minimise traffic flow disruption. To further enhance the
stability of the wall, drainage blankets were installed behind
and below the anchored zone to expedite the drainage of ground
water.
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