Geoscience Reference
In-Depth Information
Table 16.1(2). Countermeasures against liquefaction (modified fromJGS, 1998)
Principle of
improvement
Description
Drain pile
Drain installation for surrounding area
Liq
Liq
Drain
Underground
structure
Underground
structure
Dissipation
and control of
pore water
pressure
Non-liq
Non-liq
Drain pile
Steel pile with drainage function
Drainage function
Liq
Sheet pile
Non-liq
Underground diaphragm wall
Control of
shear defor-
mation and
interception
of excess
pore water
pressure
Upper structure
Liq
Diaphragm wall
Non-liq
Pile foundation
Strengthen of pile and spread foundation
Upper foundation
Additional pile
Liq
Liq
Pile
Existing pile
Counter-
measure from
structual
aspect
Non-liq
Non-liq
Strengthen of quay wall
Existing sheet pile
New
quay
wall
Liq
Non-liq
Liq : Liquefiable layer
Non-liq : Non liquefiable layer
