Permanent drainage reinforcement pipe (PDR method) [Earthquake countermeasure work / slope countermeasure work]
Construction can be carried out while leaving the plants intact! Achieve both drainage functionality and reinforcement effects at once. Additionally, we introduce drainage pipes that offer long lifespan and easy installation. *Patent obtained.
This product allows for construction while leaving plants intact and can be installed in narrow spaces. By driving steel pipes with a strainer processed outer diameter of 60.5mm into slopes at regular intervals, this method quickly discharges surface water and shallow groundwater, which are factors causing surface collapse, to the ground surface, thereby suppressing the rise of pore water pressure in soil clumps. Since the tips of the pipes are pointed and driven into the ground, pre-boring is unnecessary. The process and machinery are simple, contributing to cost savings. The impact penetration provides a compaction effect. It also shows effectiveness in suppressing deformation by restraining the ground. The drainage reinforcement pipes can prevent liquefaction within the ground due to the effects of "groundwater removal" and "dissipation of excess pore water pressure." 【Features】 ■ Simple installation with only impact penetration ■ Compaction effect is also exhibited ■ Long lifespan due to high corrosion-resistant coating ■ High versatility *For more details, please refer to the PDF document or feel free to contact us.
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Our main product is consulting engineers. Their characteristic is that, based on the fundamentals of natural sciences (geology and geotechnical engineering), engineers who are licensed professionals directly collect information through field surveys, allowing for a high-level understanding of the natural conditions that "no two locations have the same ground or topographical conditions." This enables the appropriate extraction of important items that need to be evaluated on-site, leading to rational problem-solving. Unlike standardized ground modeling and analysis methods based on guidelines and manuals, we uncover core issues and phenomena not covered by standard methods, allowing us to propose highly effective countermeasures while also enabling the development of new analysis methods and construction techniques. For example, three-dimensional stability analysis considering peripheral strength (Ota-Hayashi method), seismic analysis of fill embankments in valleys (Ota-Enokida model), and slope stability countermeasures effectively utilizing the strength within soil masses (disruption method) have emerged from this background. Additionally, we make maximum use of IT, streamlining and reducing costs by procuring useful software from overseas or developing it in-house.