"SAM Method"
-Rockfall buffer method-
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.
Related Achievements
Product & Service
Features
Buffer
The buffering effect can be expected to be 3-6 times greater than that of sand.
Lightweight
It weighs about 1/100 of earth and sand and can be easily transported by human power.
Independence
Stacking produces little or no side pressure when loads act on the top surface.
Watertightness
Extremely low water absorption over time.
There is little need to consider the effects of water, even under humid conditions.
Workability
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.
Main components and installation procedures
SAM Form
Shape and Dimensions
1.0m(W)×2.0m(L)×0.5m(t)
SAM Joint
Integrate laminated SAM forms with each other.
Fabric formwork “Tacom
Protect the uppermost or inclined surface of the SAM form against external injury.
Selection and planning of slope works according to the level of performance design.
| 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 | |||
