Geoscience Reference
In-Depth Information
Table 16.2. Countermeasuresagainst liquefaction-induced flow behind quay
Concept of
countermeasure
New structure
Existing structure
<New quay wall>
<Existing quay wall>
New quay wall
Existing quay wall
Prevention of
the
occurrence of
liquefaction
Improving by compaction or
cementation
Improving by compaction or cementation
<New quay wall>
(1)Construction of stable quay wall
<Existing quay wall>
(1)Strengthening quay wall
Existing sheet pile
Anchor
Decreasing earth pressure
with lig
ht material
New cell type wall
Stiff sheet pile
Decreasing earth
pressure with
light material
Prevention of
the
occurrence of
flow though
liquefaction
occurs
Mound of stones
Partial improvement by
compaction or cementation
Improving by compaction or
cementation
Strengthening by pile foundation
Pile foundation
(2)Decreasing of displacement of the ground behind quay wall
Steel piles or diaphragm wall
Improving by compaction or
cementation
<New pile foundation>
<Existing pile foundation>
Increasing number or
diameter of piles
Additional piles
Keeping of
service ability
though
liquefaction-
induced flow
occurs
Surrounding by diaphragm or
cement mixing wall
Caisson type
foundation
Improving by compaction or
cementation
