設計室ソイル List of Products and Services

Our company conducts research, design, and development of various construction methods for building foundations and ground. This time, we will introduce four effective methods for ground reinforcement and liquefaction countermeasures. 1. Ground Reinforcement "RES-P Method" This is a ground reinforcement method for small-scale buildings that prevents settlement by driving pipes (thin-walled steel pipes) into weak ground and strengthening the ground through the composite action of the ground and the pipes. 2. Pile-type Ground Reinforcement "Σ-i Method" This ground reinforcement method uses small-diameter steel pipes with wing tips at the ends, suitable for all types of soil, including sandy and clayey soils, and can be constructed even in narrow spaces. 3. Three-layer Soil Cement Column "ef Column Method" This ground reinforcement method features a cement milk layer and a core steel pipe at the center of the soil cement column. 4. Liquefaction Countermeasure "GRID WALL Method" The grid-like continuous underground wall suppresses ground deformation during earthquakes and prevents liquefaction. The use of a small triaxial construction machine allows for construction in narrow spaces. Additionally, we hold seminars to train professionals in residential foundations and ground! ★Currently, we are offering a catalog featuring the four methods and seminars available for "download"!★

• Residential foundations
• Ground foundation construction method
• Other civil engineering services

The "i-LIFT method" is a technique that injects grout into the ground to lift and restore tilted or sunken buildings while also enhancing the ground's bearing capacity. It boasts high construction precision, minimal vibration and noise generation, and uses environmentally friendly grout materials, making it a reliable and safe method. The grout used in the i-LIFT method is primarily a quick-setting cement-based injection material. It has low dispersion into the surrounding area, posing no burden on the environment. Being chemically stable, it can maintain the ground's bearing strength over the long term. 【Features】 - Reliable construction enabled by the three i's (injection). - Continuous measurement during injection with high-precision leveling instruments allows for fine adjustments. - Compact machinery allows for construction even in tight spaces between adjacent buildings. - Shorter construction periods compared to conventional methods, and work can proceed regardless of weather conditions. - No restrictions based on the building's foundation structure, allowing for work even if ground improvement has already been performed. *For more details, please contact us or download the catalog.

• Ground foundation construction method

The ef column method is an evolved soil cement column technique that achieves high load-bearing capacity and high quality, while also being excellent in terms of environmental and cost aspects for a new era. In the ef column method, a core steel pipe is adopted at the center of the soil cement column, and a layer of high compressive strength solidifying agent milk is placed around its outer circumference. This three-layer structure not only realizes excellent load-bearing capacity but also prevents corrosion of the core material. Additionally, during dismantling and removal, the core material serves as a guide for the excavation blade, making it possible to remove the improved body more reliably and easily than conventional methods, which is its greatest feature. 【Features】 - Significant improvement in load-bearing capacity due to the adoption of the core steel pipe - Small improvement diameter with high strength - Reduction in cement usage, lowering material costs and environmental impact - Easy removal of soil cement columns *For more details, please contact us or download the catalog.

• Earthworks
• Ground improvement
• Pile and foundation work

The "Σ-i Method" is a ground reinforcement technique for small-scale buildings such as houses, which involves driving a pile equipped with four cutting blades and a spiral wing at the tip into the ground while rotating. This method consolidates all necessary elements for ground reinforcement, ensuring high pile performance, reliability and safety during construction, as well as consideration for the environment and neighboring areas. Due to the high penetration thrust generated by the shape of the tip wings, it allows for the use of compact construction machinery, enabling construction without being affected by narrow sites or adjacent environments. 【Features】 ○ Reliable bearing capacity - The wing section attached to the tip of the pile can achieve a bearing capacity that is 2.5 to 4.0 times larger than the diameter of the steel pipe shaft. ○ Adaptable to various ground conditions - Suitable for all types of ground, including sandy, gravelly, and clayey soils, making it a highly versatile ground reinforcement method. ○ Environmental consideration - The rotational penetration construction minimizes vibration and noise, and there is no generation of excavated soil during construction. ○ High construction performance - The spiral wing section, molded integrally with the four cutting blades, can easily penetrate hard supporting layer ground. ○ Consistent management system *For more details, please contact us or download the catalog.

• Ground foundation construction method

The "RES-P method" is a type of piled raft foundation construction method. It involves driving pipes (thin steel pipes) into weak ground to strengthen the ground through the combined action of the ground and the pipes, preventing settlement and reinforcing the foundation of residential buildings. It supports the load of the building by combining the bearing capacity of the ground with the bearing capacity of the driven pipes. In the case of single-family homes, the construction can be completed in one day, allowing for immediate commencement of foundation work afterward. 【Features】 ○ Reinforcement possible up to a depth of 14m ○ Flat ground reinforcement method ○ No curing period required ○ No residual soil generated ○ Can be constructed on narrow land For more details, please contact us or download the catalog.

• Ground foundation construction method