日本サミコン List of Products and Services

We would like to introduce a case where our "precast invert" was adopted for the Bandaki Tunnel on the Nishinomiya-Kita Road in Hyogo Prefecture. The Bandaki Tunnel experienced bulging over a length of approximately 10 meters, but the site had no detour routes, making it difficult to impose a full-day traffic restriction on the bus route. As a result, a precast invert that allows for full closure at night and full opening during the day was adopted. By considering the shape of the components and installation methods according to the site conditions each time, construction can be carried out within the narrow tunnel and within the limited closure time. 【Overview】 ■ Location: Hyogo Prefecture ■ Completion: 2015 ■ Client: Hyogo Prefectural Road Corporation ■ Remarks: 10.5m *For more details, please refer to the PDF document or feel free to contact us.

• Tunnel construction
• Tunnel Materials

"Sepinon" is a snow eave prevention board used for snow protection and preventing snow eaves. In areas with heavy snowfall, snow that accumulates at the entrance of sheds, shelters, or tunnels can grow larger towards the downwind side, forming a snow eave (seppi: snow canopy). This product can prevent property damage and personal injury accidents caused by snow falling from snow eaves. 【Features】 ■ Captures the flow of wind ■ Prevents snow from collapsing onto the road ■ Protects lives from accidents and other dangers *For more details, please refer to the PDF document or feel free to contact us.

• others

The technology involves constructing a reinforced soil wall using geogrids to protect target objects from falling rocks. By utilizing a three-dimensional honeycomb structure geocell made of high-density polyethylene as a buffer material and high-performance single-sized crushed stone as the infill material, it can withstand falling rock energy of up to 4500 kJ. Additionally, by using multidirectional reinforced geogrids in the reinforced soil mass, a dispersal effect of the impact load from falling rocks can be expected. 【Features】 ■ Capable of withstanding falling rock energy of up to 4500 kJ ■ Shortened construction period and improved workability due to easy installation ■ Harmony with the natural environment and enhanced aesthetics ■ Cost reduction through decreased ground improvement expenses ■ Contribution to the recycling of construction-generated soil *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Method

The "Zero Eight Fence" is a rockfall protection fence that can withstand rockfall energy up to 300 kJ. Since the posts hardly displace, there is no need to replace the posts for recurring rockfalls. Additionally, only the damaged cushioning devices, wire ropes, and mesh need to be replaced, which is expected to significantly reduce maintenance costs. 【Features】 ■ Supports rockfall energy up to 300 kJ ■ Simple structure excels in durability and cost-effectiveness ■ Reduces costs in areas with recurring incidents ■ Minimal protrusion ■ No need to replace posts for recurring rockfalls *For more details, please refer to the PDF document or feel free to contact us.

• Protective fence

This technology involves constructing reinforced soil walls using geogrids to protect target objects from avalanches or to change the direction of avalanche flow to guide it to a safe location. By adopting precast concrete panels for the avalanche impact surface, significant improvements in workability have been achieved, including the reduction of temporary scaffolding, labor savings, shortened construction periods, and enhanced safety during construction. 【Features】 - Labor savings and shortened construction periods due to the use of precast concrete panels - Shortened construction periods and improved safety during construction through the reduction of temporary scaffolding - Reduced foundation ground treatment costs by adopting a flexible reinforced soil method - Enhanced harmony with the natural environment and improved aesthetics through vegetation greening of the wall surface - Capability to use a wide range of embankment materials, contributing to the recycling of construction-generated soil *For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Method

The technology is a cushioning method using expanded polystyrene for rockfall mitigation. The "SAM Foam," made of expanded polystyrene, is extremely lightweight with a density about 1/100 that of sand, significantly reducing dead weight. Additionally, due to its lightweight nature, it does not require large construction machinery for transportation and installation, allowing for manual labor. Furthermore, it can be easily processed on-site to match the slope shape. 【Features of SAM Foam】 ■ Significantly reduces dead weight ■ No lateral pressure occurs even when loads are applied to the top through stacking ■ Does not bond with water, resulting in very little water absorption over time ■ There is almost no need to consider the effects of water even under high humidity conditions ■ Lightweight, so it does not require large construction machinery for transportation and installation *For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Method

"DsGuard" is a protective fence designed to respond to small-scale avalanches and falling snow, capable of accumulating snow on D-shaped structures to protect roads. It has been improved from the Snow Keeper to enable response to small-scale avalanches. Additionally, compared to cantilever protective fences and reinforced earth walls, it can accumulate approximately 2 to 8 times more snow on the back side of the structure (compared to our company’s standards). 【Features】 ■ Stops falling snow and avalanches ■ Secures road space ■ No impact on roads due to cantilevering *For more details, please refer to the PDF materials or feel free to contact us.

• Protective fence

The "PCL method" of Nippon Samicon is a self-supporting lining method that constructs PCL panels divided into multiple segments on the upper half of the tunnel's interior. It is primarily used in road tunnels, but can also be utilized for the repair and reinforcement of waterway tunnels, as well as for the lining of newly constructed NATM tunnels. PCL panels are highly durable due to strict quality control, and their surfaces can be treated with paint or embedded with lighting inserts. Furthermore, by filling the space between the PCL panels and the surrounding ground with backfill, high stability can be expected even under unexpected loads. Construction with PCL panels allows for the selection of the optimal method from two options, "spin arm method" and "forklift method," based on various conditions such as traffic constraints, the number of panel segments, mass, construction length, and economic factors. 【Features】 ■ Strict quality control ■ Excellent durability ■ Significant reduction in construction time with specialized erection equipment ■ Approximately 30% cost reduction compared to conventional methods ■ Safety *For more details, please refer to the catalog or feel free to contact us.

• Tunnel construction
• Tunnel Materials

The "Megarock Keeper MRK35" is a rockfall protection structure that can withstand rockfall energy in the megajoule (MJ) class, as demonstrated by practical experiments. Since it is a roadside structure, maintenance tasks such as rock removal can be easily performed, and it does not require repairs or component replacements for medium-sized rockfalls, making it durable and excellent in handling repeated loads. It can also address avalanche and landslide debris issues. 【Features】 ■ Capable of withstanding rockfall energy ■ Low life cycle cost ■ Can be addressed through repairs based on the condition of component damage ■ Easy maintenance tasks such as rock removal *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Design Office
• Facility Design
• stone