OHO Drainage Method

No need for disposal of surplus soil and muddy water! A construction method that allows for the simultaneous installation of drainage materials during drilling.

The "OHO Drain Method" is a simultaneous embedding technique that suppresses the discharge of excavated soil to the surface and allows for the installation of drainage material, which becomes a drainage medium upon completion of the drilling, at a specified depth. By embedding drainage material in ground with a high potential for liquefaction, it dissipates the rise and accumulation of excess pore water pressure that occurs during an earthquake, thereby preventing ground liquefaction. It enables dry drilling without the use of drilling water or additives, allowing for a clean construction process. 【Application Examples】 - Liquefaction countermeasures for foundation ground of buildings and underground structures - Liquefaction countermeasures for manholes *For more details, please feel free to contact us.

basic information

【Features】 ■ The earth auger, which incorporates drilling rods into the drainage material, can drill to a specified depth and leave the drainage material in place, preventing liquefaction of the foundation ground. ■ By simultaneously embedding the drainage material, the work is limited to casing drilling, grouting management, and rod extraction only, improving work efficiency. ■ The tip head connected to the drilling rod is equipped with functions for drilling propulsion and preventing the drainage material from floating up. ■ Since no water or additives are used in the drilling process, there is no need for the disposal of industrial waste as defined by regulations regarding mud and soil. ■ The embedding of drainage material can be done vertically or at an angle. ■ Construction is possible around existing residential areas, roads, infrastructure, structures, and in narrow or confined spaces. ■ There is almost no noise or vibration during construction, making it feasible to work in urban areas. *For more details, please feel free to contact us.