[NETIS Registration] Chemical injection method that reduces injection loss during construction.
The High Grip Grout Method is a grouting technique that enhances the prevention of chemical leakage from drilled holes using ground packers, ensures a large source of chemical penetration with special sealing materials, and improves injection efficiency through a centralized management system for chemical injection. *NETIS Registered Technology: CB-180028-A [Ground Packers] Ground packers are designed with a structure that prevents the leakage of filling materials (a double structure of fabric and rubber), which suppresses shrinkage after the expansion of the ground packer and enhances the adhesion between the drilled hole and the ground packer. This prevents the leakage of chemicals from the drilled hole. [Special Sealing Materials] The sealing materials use a special substance that fluidizes when reacting with chemicals, protecting the hole walls during drilling and ensuring a large penetration area during chemical injection. This allows for a reduction in injection pressure and the creation of a large-diameter modified body with a diameter of 2.5 meters. [Injection Management System] The system used in this method can simultaneously manage multiple chemical injection pumps (16 points). This improves the efficiency of injection and achieves cost reduction through shortened processes. *For more details, please refer to the catalog or feel free to contact us.
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basic information
1. Applicable Ground Sandy ground (Fc<40%) 2. Improvement Specifications 1) Improvement Diameter: 2.5m (maximum) 2) Chemicals Used: Special silica solution (permanent type), water glass-based solution, cement-based injection material 3) Improvement Strength: When using a special silica solution with a concentration of 4-10%, uniaxial compressive strength: 50-150 kPa, liquefaction strength ratio: 0.3-0.9 3. Highly Effective Application Range 1) Improvement of the ground directly beneath existing facilities 2) Improvement of the ground surrounding underground structures 3) Improvement under constraints that do not stop the use of existing facilities 4. Site Conditions 1) Drilling - Plant installation area is 50m² for 2 sets - Occupied area for drilling machines is approximately 3m² to 10m² 2) Chemical Injection - Plant installation area: 7m × 16m = 112m² (standard)
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Applications/Examples of results
[Main Uses] - Liquefaction countermeasures in urban areas - Liquefaction countermeasures for existing bridge pier foundations, river embankment foundations, and other civil engineering structure foundations - Ground improvement - Reduction of soil pressure on the ground behind structures - Countermeasures for seepage in quay walls and revetments ⇒ The construction equipment is compact, and there is almost no impact on the surrounding area during construction, allowing for work in narrow spaces and construction while facilities are in use.
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Company information
Our company was founded in 1958 and specializes in underground special civil engineering works such as underground continuous walls, underground obstacle removal, ground improvement, and pipeline construction. In recent years, we have expanded our business operations to include slope work and construction. There is a growing social demand for securing the natural environment, seismic reinforcement, liquefaction prevention, restoration of structures, and urban redevelopment, which have become pressing issues in recent years. In response to these social needs, we have developed seismic reinforcement and liquefaction countermeasure methods such as the "Ultra Multi-Point DP Method" and the "High Grip Grout Method." For structural restoration, we utilize our in-house developed restoration method called "Suiheikun," and for urban redevelopment, we are conducting research and development of new methods such as the "Hiro Work Kmigty Method," "Bauer Method," and "Super Top Method," aimed at underground obstacle removal. Additionally, as part of our eco-friendly initiatives, we are researching and developing methods that use bubble drilling fluid to reduce industrial waste, striving to contribute to society through high-quality construction and services. We aim to continue responding to the needs of the times by deploying a variety of specialized techniques and uniquely developed methods.