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Double Packer Method for Liquid Injection

Double Packer Method for Liquid Injection

Injectable at low injection pressure! This is a construction method used for reinforcing ground near important structures.

We would like to introduce the "Double Packer Method" adopted by our group. This method achieves a high injection effect and can be injected at low pressure, making it particularly effective for construction under special conditions, such as highly important projects or work directly beneath structures. Currently, it accounts for about 50% of the total number of cases and approximately 40% of the injection volume, and it tends to be adopted in large-scale projects. 【Features】 ■ Achieves a high injection effect ■ Can be injected at low pressure ■ Effective for construction under special conditions, such as highly important projects or work directly beneath structures ■ Accounts for about 50% of the total number of cases and approximately 40% of the injection volume ■ Tends to be adopted in large-scale projects *For more details, please refer to the PDF materials or feel free to contact us.

  • Ground foundation construction method

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For hard, unconsolidated ground and deep construction, liquefaction countermeasures are also addressed by the "sleeve injection method."

For hard, unconsolidated ground and deep construction, liquefaction countermeasures are also addressed by the "sleeve injection method."

A chemical grouting method that is most effective for hard, unconsolidated ground. It is suitable for deep construction projects and can also be applied for liquefaction countermeasures.

The sleeve injection method is a double packer technique that separates the installation of injection pipes from the injection work. It is suitable for large-scale construction projects or cases where high effectiveness is required, as well as for deep construction projects, and can also be applied for liquefaction countermeasures. 【Applications】 ● Stabilization of the bottom slab and backfill of the shaft (waterproofing and strength increase) ● Protection of soil retention deficiencies ● Stabilization of the face of shield or thrusting ● Prevention of loosening in the route section of shield or thrusting ● Stabilization of the backfill and bottom slab of deep foundations (waterproofing and strength increase) ● Liquefaction countermeasures 【Features】 ● Covers almost all target ground areas. It is most effective against hard, unconsolidated ground where other methods cannot be applied. ● By using injection materials with a long gel time, low-speed and low-pressure injection is possible, allowing for reliable permeation injection even in fine sand layers. ● The external injection pipe is left underground, enabling re-injection at necessary locations even after the initial injection. ● A complete packer can be created with seal grout, completely preventing the escape of injection material from around the injection pipe. ● There is very little ground deformation, and the impact on nearby structures is also minimal.

  • Ground improvement

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Drug solution injection method "Double pipe strainer method (single-phase type and multi-phase type)"

Drug solution injection method "Double pipe strainer method (single-phase type and multi-phase type)"

We have a track record of back protection for missing parts of mountain retention! Let us introduce the construction methods adopted by our company group.

The "Double Pipe Strainer Method (Single Phase and Multi Phase)" is one of the liquid injection methods adopted by our group. The single-phase method can prevent diffusion beyond the specified area, but the gel time is too short to achieve sufficient improvement effects within the required range. On the other hand, the multi-phase method can prevent diffusion with a short gel time while allowing for permeation injection with a slightly longer gel time. The injection effect is significantly higher, and it is now widely adopted. [Features] ■ Single Phase - Prevents diffusion beyond the specified area and solidifies within the necessary location with a short gel time (in seconds). ■ Multi Phase - Prevents diffusion with a short gel time while allowing for permeation injection with a slightly longer gel time, resulting in a high injection effect. *For more details, please refer to the PDF materials or feel free to contact us.

  • Ground foundation construction method

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Drug solution injection method

Drug solution injection method

Construction is possible on any type of ground! You can continue your daily life as usual during the construction.

The "liquid injection method" is a technique used when the ground on which a building has already been constructed is weak. By injecting expandable resin into weak ground or gaps and cavities created by tilting, the issue of tilting can be resolved. This method can be applied to any type of ground, and normal life can continue during construction. Please feel free to contact us when you need our services. 【Other Methods】 ■ Pressure Plate Method ■ Underpinning Method ■ Side Pinning Method ■ Foundation Lifting Method *For more details, please download the PDF or feel free to contact us.

  • Ground foundation construction method

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