Geoscience Reference
In-Depth Information
Table 16.1(1). Countermeasures against liquefaction (modified fromJGS, 1998)
Principle of
improvement
Description
Sand compaction pile
Vibro rod method
Vibro flotation
Dynamic consolidation
Vibro tamper
Compaction by roller
Stone column
Hammer
Liq
Liq
Non-liq
Sand pile
Increase of
density
Compaction by explosion
Group pile method
Upper structure
Liq
Liq
Pile
Non-liq
Non-liq
Deep mixing method
Quick lime pile method
I
njection method
Liq
Liq
Liq
Grout
Non-liq
Cement or lime column
Non-liq
Soildification
Pre-mixing method
Cement-mixed sand
Quay
wall
Liq
Non-liq
Deep wel
l
Dewatering by trenches
pump
Reduction of
degree of
saturation
and increase
of effective
stress
Liq
Liq
Drainage canal
Non-liq
Non-liq
Liq : Liquefiable layer
Non-liq : Non liquefiable layer
