Finally realized! The joint (pipe opening) between small-diameter manholes and pipes will be improved to a seismic-resistant structure.
The "Magma Rock Method mini・NGJ" is a non-excavation seismic reinforcement method developed to enhance the seismic resistance of the "pipe connection points where existing pipelines and manholes connect," which do not have seismic resistance, targeting pipe diameters of 700mm or less. Based on the seismic technology cultivated in the "Magma Rock Method NGJ," which targets diameters of 800mm and above, this method improves the pipe connections of existing pipelines and manholes that lack seismic resistance to a seismic structure that can withstand Level 2 seismic motion. 【Features】 - All work, including the installation of guiding joints, can be performed inside the manhole, eliminating the need for work on the ground. - Reliable construction can be achieved in a short time, even when the pipe is in a flowing state. - The guiding joints are cut into the pipe while leaving part of the pipe's thickness, preventing the intrusion of groundwater or soil during construction. - Small diameter pipe connections (φ200 to φ700) are improved to a seismic structure that can withstand Level 2 (seismic motion). *For more details, please refer to the PDF document or feel free to contact us.
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【Construction Procedures】 ■Pipe Inner Diameter Measurement ■Guide Joint Installation Work ■Sealant Filling Work ■Mini Magma Installation Work *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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The Japan Snap Lock Association is raising alarms about the seismic resistance of existing buried pipes and continues to advocate for the necessity of seismic retrofitting. They handle methods such as the "Magma Lock Method," developed to improve seismic structures without excavation, and will expand their activities based on past achievements.