エターナルプレザーブ List of Products and Services

The "ecoweb(TM) geocell" is made from high-density polyethylene that is formed into a honeycomb shape using ultrasonic welding. It is a construction method that fills local excavated soil or crushed stone to provide a constrained supporting ground. In the subgrade, the geocell layer effect can be achieved with a CBR of 3% or less, and it is provided in a thin layer. Additionally, by distributing the vehicle wheel loads and reducing rutting, the drivability is improved. 【Features】 - Erosion caused by scouring is reduced, leading to lower maintenance costs. - In soft ground, it offers improved cost-effectiveness and workability compared to cement stabilization. - On construction roads over soft ground, the constraining effect of the geocell layer enables vehicle passage. *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Method
• Ground improvement materials

This is a method for reinforcing earth walls using mattress baskets and mesh sections, designed for swampy and catchment areas. Since the mattress basket (wall material) and the mesh section (reinforcement material) are molded as a single unit, the stability and constructability of the structure are improved. With a Galfan (melted zinc-5% aluminum alloy) + Polimac (or PVC) coating, the durability is 120 years. A decrease in water levels within the fill is also expected. By using high-strength geosynthetics in conjunction (Terra Mesh Hybrid Method), economic efficiency is enhanced, making it applicable to reinforced earth walls over 8 meters high. There is also an application for the Terra Mesh retaining wall (TM-Y), which is a structure using gravelly soil in the mesh section as a disaster recovery measure. 【Features】 - The mattress basket (wall material) and mesh section (reinforcement material) are molded as a single unit, improving stability and constructability as a structure. - Durability is 120 years. - A decrease in water levels within the fill is also expected. *For more details, please download the materials or contact us.

• Reinforced earth wall
• Dam construction
• Baskets and futon baskets

The residual displacement of embankments caused by earthquakes mainly concerns the displacement amount due to the sliding of sliding soil masses. The "Newmark Method" is a construction method that suppresses the residual displacement amount through the installation of geosynthetics. As a method for analyzing residual deformation against Level 2 seismic motion for high embankments, this method selects the design seismic motion considering embankment conditions, topography, geology, etc. 【Calculation of Residual Displacement】 ■ Calculation of horizontal seismic intensity when the sliding safety factor Fs = 1.0 after the installation of geosynthetics ■ Calculation of yield acceleration based on peak strength and residual strength ■ Calculation of residual displacement amount ■ Ensuring that the residual displacement amount is within the allowable displacement amount ■ Suppressing the residual displacement amount through the installation of geosynthetics *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction
• Paving Materials
• Civil Engineering Method

The "Mattress Method" is one of the surface treatment methods used to reinforce the foundation ground. Under the surface of a foundation ground that lacks bearing capacity, or beneath the foundation of an underground structure, a three-dimensional and plate-like structure (mattress structure) is installed using "paralink" and infill materials (such as sand, gravel, or crushed stone). This forms a rigid plate-like structure that reinforces the foundation ground by distributing the load of the upper structure and exhibiting shear resistance within the mattress structure. 【Mattress Reinforcement Effects】 ■ Lifting effect due to the tensile force of the paralink ■ Shear effect due to the shear resistance of the infill material ■ Load distribution effect within the mattress structure *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction
• Paving Materials
• Civil Engineering Method

When the drainage method alone does not meet the required safety factor, combining it with Paralink can improve the safety factor. Additionally, when a denser drainage pitch (≤1.0m) is necessary, using Paralink in conjunction allows for widening the pitch, which can also reduce costs. 【Construction Example】 ■ Japan Highway Public Corporation Kisarazu Construction Office, Tateyama Expressway, Kimitsu IC Construction *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction
• Paving Materials
• Civil Engineering Method

When the safety factor for sliding of unreinforced fill is Fs < 1.0, it is possible to achieve Fs ≈ 1.0 using shallow improvement methods, and by supplementing the insufficient restraining force with para-links, the strength of the shallow improvement can be controlled, allowing for a reduction in overall costs. Additionally, by laying para-links beneath the shallow improvement body, it is also possible to prevent cracks that may occur in the shallow improvement body. 【Construction Procedure】 ■ Excavation: Improves workability by using slopes (heavy machinery can operate) ■ Installation of reinforcement materials: Also improves trafficability ■ Mixing, spreading, and compacting of improvement materials *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction
• Paving Materials
• Civil Engineering Method

The "Low Improvement DMM Method" is a construction technique that places improved columns across the entire width in the transverse direction, which can suppress overall deformation of the embankment and allows for cost reduction by using a low improvement rate (by widening the spacing of the improved columns). When ground improvement is carried out at a low improvement rate, issues such as differential settlement between the improved and unimproved areas may arise, necessitating surface treatment as a countermeasure. For surface treatment, geosynthetics (Paralink) installation and shallow improvement methods are effective. [Selection of Geosynthetic (Paralink) Standards] ■ Determination of target differential settlement amount ■ -1 Calculation of proportional coefficient α ■ -2 Determination of tensile rigidity EA ■ Confirmation of tensile strength ■ Determination of required part numbers *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction
• Paving Materials
• Civil Engineering Method

The "SECURE-G Method" involves constructing a crushed stone layer that incorporates geosynthetics, which are tensile reinforcement materials made of high-strength fibers, beneath the embankment. This method suppresses the deformation of the embankment during liquefaction. In addition to preventing cracks and unevenness at the top, it significantly reduces costs compared to conventional solidification-based liquefaction countermeasures. It can be applied to earth structures (such as bridge abutment backfills, tsunami multi-defense embankments, emergency roads, etc.), as well as parking lots and disaster prevention stations. 【Features】 ■ Reduces settlement deformation by over 30% ■ Suppresses lateral displacement ■ Prevents sliding of the embankment, cracks, and unevenness at the top ■ Damage is limited, allowing for rapid recovery of embankment functionality ■ Standard performance that significantly reduces costs and greenhouse gas emissions compared to conventional solidification-based liquefaction countermeasures ■ NETIS registration No. TH-140012-VR ☆ Currently, we are offering five years' worth of back issues of the "Geosynthetics Deformation Suppression Method Research Society SECURE Newsletter," which summarizes case studies. For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Sheet
• Ground improvement
• Earthquake-resistant construction method

High-strength strip geosynthetics "Paralink" used in embankment reinforcement methods on weak ground. It is a material with high strength, workability, cost-effectiveness, and high durability. It has obtained construction technology examination certification (Civil Engineering Research Center). 【Features】 - It uses high-strength polyester long fibers arranged parallel and densely as the core material, with the fiber bundle coated with polyethylene to form a strip material. - Paralink is a high-strength strip geosynthetic that aligns the strip material at equal intervals in the vertical direction on a surface of 4.5m width. - It suppresses deformation of the embankment during liquefaction. - It is a material that is resistant to earthquakes and is also used for seismic measures in high embankments. *For more details, please download the materials or contact us.

• Foundation construction
• Paving Materials
• Civil Engineering Method