A low-cost, high-performance rockfall buffer method for use on roadway caverns.
The SAM method uses lightweight Styrofoam (SAM foam) instead of sand or crushed stone, which have been used for rock sheds, to provide a more effective buffer.
New Technology Information System “NETIS Registration”: SAM Method Reinforcement Type
Registration No. KK-130016-A
*For sale only in the Japanese market.
The buffering effect can be expected to be 3-6 times greater than that of sand.
It weighs about 1/100 of earth and sand and can be easily transported by human power.
Stacking produces little or no side pressure when loads act on the top surface.
Extremely low water absorption over time.
There is little need to consider the effects of water, even under humid conditions.
Since it is lighter than sand and other materials, it requires little or no large construction equipment for transportation and installation, and can be done by human labor.
Shape and Dimensions
1.0m(W)×2.0m(L)×0.5m(t)
Integrate laminated SAM forms with each other.
Protect the uppermost or inclined surface of the SAM form against external injury.
| item | test procedure | unit | type | ||
|---|---|---|---|---|---|
| SAM-15 | SAM-20 | ||||
| Density | JIS K 7222 | kg/m3 | 15/ +10% -0% | 20/ +10% -0% | |
| Compressive strength (10% strain) | JIS K 7222 | N/mm2 | 8.5 x 10-2~11.0 x 10-2 | 12 x 10-2~15.0 x 10-2 | |
| Dimensions | length | tape measure | mm | 2000±11 | |
| range (e.g. of voice) | tape measure | mm | 1000±7 | ||
| thickness | tape measure | mm | 500±4 | ||
| Flammability | JIS A 9511 | Passed flammability test | |||
