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The "Eco-GEO Method" we employ is a ground improvement technology that allows for stable quality crushed stone ground improvement work even in narrow sites. By using the "EG Casing," we prevent the collapse of the borehole walls, and through the crushed stone compaction method, we ensure stable quality without relying on the operator's skill, enabling quick construction with simple operations. Additionally, we offer two types: the "Dewatering Type," which discharges excavated soil, and the "No Dewatering Type," which does not produce any excavated soil. 【Features】 ■ No waste is generated ■ Since no artificial materials are left underground, it is less likely to decrease the land's asset value ■ Strength does not deteriorate ■ Liquefaction countermeasures during earthquakes ■ Two types available: dewatering and no dewatering *For more details, please download the PDF or feel free to contact us.

• Ground improvement

The "Eco-GEO Method" is a ground improvement technology that uses only crushed natural materials. No waste is generated during construction, and compared to cement and steel, it significantly reduces CO2 emissions. Additionally, curing time, water, post-testing, and pile head treatment are not required. Therefore, foundation work can begin immediately after construction is completed. 【Features】 ■ Obtained building technology performance certification ■ Shorter design length and more economical compared to conventional methods ■ Zero waste and zero leftover soil ■ No need for curing, water, post-testing, or pile head treatment *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce our construction achievements of the "Eco Geo Method" for residential crushed stone ground improvement work. It has been adopted as a drainage measure for embankments on highways. Please feel free to contact us when you need our services. 【Case Overview】 ■ Drainage measures for embankments on highways *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce a case where our residential crushed stone ground improvement work, the "Eco Geo Method," was adopted as a liquefaction countermeasure in public works in areas affected by liquefaction during the Great East Japan Earthquake. In conventional technology, the construction of crushed stone piles required for liquefaction countermeasures was difficult without large machinery. Our technology allows for the construction of "homogeneous crushed stone piles" required for liquefaction countermeasures through "casing." In the future, it can be applied not only to the recovery and reconstruction of disaster-stricken areas but also to liquefaction countermeasure works for residential and public projects nationwide. [Case Overview] ■ Project: Liquefaction countermeasure work for public housing ■ Project Details: Crushed stone pile installation depth of approximately 4.0m, quantity of about 750 piles ■ Client: Abiko City, Chiba Prefecture ■ Construction Period: December 2013 to January 2014 (approximately 1 month) *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce a case where the Eco-GEO method was adopted for ground improvement in caisson construction. In caisson ground improvement work, ground improvement using gravel piles is the standard specification. Due to the small size of the machinery (width 2.0m, weight approximately 11t), parallel work with other construction projects is possible, leading to a reduction in construction time, which is why this method was adopted. Please feel free to contact us when you need our services. 【Project Overview】 ■ Construction Location: Saitama Prefecture ■ Design and Construction Depth: 4.76m ■ Number of Design and Construction: 292 piles *For more details, please download the PDF or feel free to contact us.

• Ground improvement

The Eco-GEO method is a ground improvement technology developed based on joint research between Onabe Corporation and Mie University, using only crushed stone. It is a ground improvement technology that has a low environmental impact and a low possibility of decreasing land value. This technology has been recognized for its lower CO2 emissions and lack of waste generation compared to conventional methods, and it received an Excellence Award at the 49th Environmental Awards. [Overview of the Environmental Awards] ■ Organizer: National Institute for Environmental Studies, Nikkan Kogyo Shimbun ■ Support: Ministry of the Environment ■ Awardees: Onabe Corporation, Mie University, Mie TLO Corporation *For more details, please download the PDF or feel free to contact us.

• Ground improvement

The Eco-GEO method is a ground improvement technology developed based on joint research between Onabe Group Co., Ltd. and Mie University, using only crushed stone. It is a ground improvement technology that has a low impact on the global environment and a low possibility of decreasing land value. In this technology, crushed stone remains underground, but based on the evaluation from the joint research paper by Onabe Group and Mie University, it was assessed by real estate appraisers that "the possibility of decreasing land value is low." 【Features of the Eco-GEO Method】 ■ Ground improvement technology using only crushed stone ■ Low impact on the global environment ■ Low possibility of decreasing land value *For more details, please download the PDF or feel free to contact us.

• Ground improvement

Our company proposes the "Eco Geo Method" for ground improvement using crushed stone for residential foundations to our clients. When the ground for building a house is weak and requires ground improvement work, it is important to inform the clients about "multiple ground improvement methods that can be used for that ground," "the advantages and disadvantages of each method," and "the impact on land value and the global environment." By doing so, clients can choose ground improvement work with peace of mind. Additionally, the construction company can reduce troubles caused by insufficient explanations, leading to an improved trust relationship with the clients. [Features] ■ Clients can choose ground improvement work with confidence. ■ Reduces troubles caused by insufficient explanations, leading to an improved trust relationship with clients. *For more details, please download the PDF or feel free to contact us.

• Ground improvement

As efforts towards the SDGs are being demanded worldwide, measures against global warming and waste reduction are urgent issues. In ground improvement work, consideration for the global environment is also required. Ground improvement work varies in CO2 emissions and the materials left underground depending on the materials and methods used. Additionally, attention must be paid to soil contamination. *For more detailed information, please refer to the related links. Feel free to contact us for more details.

• Ground improvement

If there are items buried underground from ground improvement work or if the soil is contaminated, the costs for their removal may be deducted from the land price, potentially leading to a decrease in land value. Land is an important asset for individuals and corporations. Ground improvement work is crucial for supporting buildings, but it may impact the value of the land in the future. Recently, more people are considering future removal when conducting ground improvement work. *For more details, you can view the related links. Please feel free to contact us for more information.*

• Ground improvement

We would like to introduce the ground warranty companies for our residential crushed stone ground improvement work, "Eco Geo Method." Ground warranty is important in case of any subsidence accidents. Our method can receive guarantees from all major ground warranty companies in Japan. Please feel free to contact us when you need our services. 【Ground Warranty Companies (Excerpt)】 ■ JAPAN HOME SHIELD ■ House Warranty Association ■ GIR Co., Ltd. ■ Ground Network ■ ZAIJU BIZ *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce our residential crushed stone ground improvement work, the "Eco Geo Method." When the holes excavated during construction collapse and soil mixes with the crushed stone, the strength of the crushed stone column decreases. Our method successfully prevents this by using our uniquely developed EG casing. Even in weak ground with groundwater, we can create a stable quality crushed stone column without collapsing the excavated holes. 【Features】 ■ Ensures the prevention of wall collapse in the holes ■ Creates a reinforcement body made solely of crushed stone without soil mixing ■ Ensures the designed bearing capacity and permeability *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce our residential crushed stone ground improvement work, the "Eco Geo Method." There is no cement dust adhering to nearby houses or vehicles. It can be safely constructed even in densely populated residential areas. Additionally, the machines used are ground improvement machines and mini backhoes. The compaction of the crushed stone is done through rotation, resulting in minimal vibration and noise. 【Features】 ■ No cement dust dispersion ■ Low noise and vibration *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce our residential crushed stone ground improvement work, "Eco Geo Method." Since there is no need for a curing period, construction time can be shortened. No water is used during the construction. As the material is crushed stone, there is no need for level management of the pile heads. Additionally, there is no concern about damaging the pile heads during foundation excavation. 【Features】 ■ No curing period required ■ Can be constructed without water ■ No post-testing (test pieces) required ■ No level management of pile heads needed *For more details, please download the PDF or feel free to contact us.

• Ground improvement

We would like to introduce our residential crushed stone ground improvement work, "EcoGeo Method." With the EcoGeo Method (standard type), no waste (such as empty cement bags or cut steel pipes) is generated during construction, and no artificial materials are left underground. Furthermore, with the EcoGeo ZERO Method (no soil discharge type), no surplus soil is generated during excavation, allowing us to achieve "zero waste and surplus soil" from the construction phase into the future. 【Methods】 ■ EcoGeo Method (standard type) ■ EcoGeo ZERO Method (no soil discharge type) *For more details, please download the PDF or feel free to contact us.

• Ground improvement

The Eco-GEO method is a replacement method rather than a support pile method. The weight supported by the "crushed stone reinforcement body" is distributed underground, so it does not require a solid foundation at the tip, and in many cases, the design length is shorter than that of conventional solid piles. Therefore, depending on the ground conditions, it may be possible to reduce the overall construction cost compared to other methods. 【Features】 ■ Supports the weight of the building with both the "crushed stone reinforcement body" and the "original ground" ■ Does not require a solid foundation at the tip ■ In many cases, the design length is shorter than that of conventional solid piles ■ Depending on the ground conditions, it may be possible to reduce the overall construction cost compared to other methods *For more details, please download the PDF or feel free to contact us.

• Ground improvement

The "Eco-GEO Method" is a ground improvement technology that uses only crushed natural stone, without the use of cement or steel pipes. To ensure consistently stable quality and strength, it features the use of a uniquely developed EG casing (a cylindrical device) that is not used in other crushed stone methods. 1. Contributes to the preservation of the global environment 2. Protects the value of land 3. Strength does not deteriorate 4. Measures against liquefaction during earthquakes 5. Two types available: with and without soil removal 【Achievements and Adoption Numbers (as of March 2024)】 ■ Construction agents: 58 locations ■ Housing companies that have adopted it: 4,171 companies ■ Total number of constructions: 34,449 cases *For more details, please download the PDF or feel free to contact us.

• Ground improvement

The "Eco-GEO Method" is an environmentally friendly ground improvement technology developed through joint research between Mie University and Onabe Group, which uses only "crushed stone" without the need for cement or steel pipe piles. It can be utilized for ground improvement work for residential buildings and small civil engineering structures. Furthermore, in September 2013, "Eco-GEO ZERO," which can be constructed without soil disposal, was born, making it possible to carry out construction in urban areas without disposal sites. It does not require cement plants, generators, or compressors that were necessary for conventional ground improvement work, and it allows for construction using a compact ground improvement machine (8-ton class) equipped with a uniquely developed EG casing (a steel tube with a rubber door) and a backhoe. The EG casing is driven into the ground, and crushed stone is filled and compacted into the space created during the extraction process. Since a compact ground improvement machine (approximately 2.0m wide) is used, it can be constructed even in narrow spaces. [Registered technology in the Ministry of Land, Infrastructure, Transport and Tourism's 2012 Technical Matching Database for Know-how and Technology Transfer Support Project] For more details, please contact us or download the catalog.

• Special Construction Method