Dredging Soil Category
|
Soil Quality |
Handling Method |
||
|
Category |
state |
N-value |
|
|
clayey sand |
ooze |
<4 |
pump, grab |
|
soft silt |
4~10 |
pump, grab |
|
|
neutron silt |
10~20 |
pump, grab |
|
|
rigid |
20~30 |
pump, grab |
|
|
hard |
30~40 |
break(grab)-shovel |
|
|
extremely hard |
40~50 |
break(grab)-shovel |
|
|
sandy silt |
soft |
<10 |
pump, grab |
|
neutron |
10~20 |
pump, grab |
|
|
rigid |
20~30 |
pump, grab |
|
|
hard |
30~40 |
pump+ break(grab)+shovel |
|
|
extremely hard |
40~50 |
break(grab)+shovel |
|
|
gravelly mixed clayey sand |
soft |
<30 |
grab |
|
rigid |
＞30 |
break(grab)+shovel |
|
|
gravelly mixed sand silt |
soft |
<30 |
grab |
|
rigid |
＞30 |
break(grab)+shovel |
|
|
rock stratum |
soft |
40~50 |
break(grab)+shovel |
|
slightly soft |
50~60 |
break(grab)+shovel |
|
|
neutron |
break(grab)+shovel |
||
|
rigid |
break(grab)+shovel |
||
|
hardest |
break(grab)+shovel |
||
|
grit |
loosen |
grab |
|
|
compact |
grab+shovel |
||
