What is D･Box?
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- What is D･Box?
"Environmentally friendly and safe Ground improvement:
D･Box"
D・Box is a product developed by our company based on the principle of compartmentalization of granular materials ※1. Construction methods using D・Box have a variety of effects ※2, including ground reinforcement, vibration reduction, and liquefaction damage reduction.
※1 This theory, discovered by Professor Emeritus Hajime Matsuoka of Nagoya Institute of Technology, states that by confining granular materials, the large frictional forces generated between them generate strength.
※2 See books such as "A New Approach to Geotechnical Engineering" by Hajime Matsuoka, Kyoto University Press (2003), and "Fundamentals of Design and Construction of the D・Box Method" by Hajime Matsuoka, Haruyuki Yamamoto, and Futoshi Nomoto, Morikita Publishing (2020).
Video
D･Box Introduction Video
D･Box Promotional Video（Indonesia）
Ground Improvement in Swampy Areas Using D･Box
Examples of Countermeasures for
Extremely Weak Ground (Reservoir) Using D･Box
Example of Temporary Road Construction
Using D･Box in a Farm Pond
Result
Ground Reinforcement
Many weak ground conditions are negatively affected by water retained within the soil, reducing bearing capacity. Through the pressurization process during D･Boxinstallation and the filtration effect of D･Box (permeability), water within the soil is efficiently discharged, strengthening the supporting ground.
Vibration Reduction
The crushed stone confined within D･Box sections exhibits significant frictional resistance. When vibrations from traffic or seismic activity pass through D･Box this frictional force dissipates vibration energy, effectively reducing the transmission of vibrations to buildings.
Liquefaction Damage Mitigation
Liquefaction occurs when vibrations from earthquakes cause an increase in pore water pressure between soil particles. The ground reinforced by D･Box method effectively reduces the generated pore water pressure. Combined with its water absorption capability, this synergy suppresses pressure buildup, thereby minimizing damage caused by liquefaction.
CO₂ Reduction
Compared to conventional methods using cement-based stabilizers or steel pipe piles, D･Box method significantly reduces CO2 emissions, contributing to a more environmentally friendly ground improvement solution.
For CO₂ Reduction
D・Box-LS
Shape-Retaining Suspended Rectangular Bag
D・Box-LS is a large suspended installation-type D・Box that includes reinforcement bands called truss bands inside the bag. By lifting the central lift band, the infill material can be solidified, allowing it to be transported while maintaining its rectangular shape. Furthermore, by enlarging the bag, significant work efficiency improvements can be achieved.
Construction Dimensions (mm) and Specifications
| Model | Model Dimensions (W×D×H, mm) | Infill Material Capacity (㎥) |
|---|---|---|
| D・Box-LS100 | W1000 × D1000 × H250 | 0.25 |
| D・Box-LS150 | W1500 × D1500 × H450 | 1.0 |
D・Box-SS
High-Standard Interconnected Bag
D・Box-SS is a compact D・Box equipped with guide gauges, which serve as connecting jigs inside the bag. This feature enables precise installation with dimensions suited to the structure. Additionally, joint members allow full horizontal two-way connection, resulting in effective load distribution. Due to its mobility, it can be used in restricted job sites where heavy machinery cannot be introduced.
Construction Dimensions (mm) and Specifications
| Model | Model Dimensions (W×D×H, mm) | Infill Material Capacity (㎥) |
|---|---|---|
| D・Box-SS45 | W450 × D450 × H100 | 0.0203 |
| D・Box-SS90 | W900 × D900 × H100 | 0.0810 |
Example of Use
D・Box can be used in unexpected places!
Flow
Construction Process
1
Set D･Box into a dedicated formwork and fill crushed stone.
2
Secure the upper part with Velcro and close it.
3
Lift and place it at the installation site using a backhoe or a crane.
4
After installation, compact the material using a rammer.
The Amazing Features of D・Box!
D・Box
FAQ
Frequently Asked Questions