Seismic retrofitting of large-diameter drainage pipe outlet using the "Magma Rock Method NGJ"
Non-excavation sewer pipelines (large diameter, φ800 to φ3000) seismic resistance technology. Cylindrical stainless steel and rubber sleeves designed to withstand Level 2 seismic motion.
The Magma Lock method, developed for the seismic reinforcement of pipe joint sections, demonstrates water-tight performance capable of withstanding disconnection due to level 2 seismic motion. This method involves pre-cutting grooves (joints) at the connection between the main pipe and the manhole, installing the Magma Lock, and concentrating seismic stress at this point to induce cracking in the joint. The shock absorption effect helps prevent damage to the connection. In areas where cracks occur along the joint, the pre-installed Magma Lock prevents the inflow of groundwater and soil into the pipe. Additionally, this seismic reinforcement method can be reliably installed even when the existing pipe is in a flowing state, as long as the water depth is 25% or less of the pipe diameter (maximum water level of 40 cm), targeting the connection between the manhole and the pipe. 【Applications】 ● Seismic reinforcement of the connection between manholes and pipes (circular pipes).
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【Features】 ● Improves the connection between non-seismic pipes and manholes to a seismic structure. ● For medium and large diameter pipes, all materials can be brought in through the Ø600 manhole opening, allowing all work to be performed inside the pipe. ● The installation work for the guiding joints involves cutting while leaving part of the pipe's thickness, preventing the inflow of groundwater or soil during construction. ● Even when the inside of the pipe is flowing, reliable construction can be completed in a short time.
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【Purpose】 ● Seismic reinforcement of the connection between manholes and pipes (circular pipes)
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Since its establishment, our company has played a role in national construction, primarily focusing on the "ground improvement field" with our unique grouting method. Subsequently, in response to the changes in social infrastructure development, we have refined our technologies to adapt to the needs of the times and, at times, acquired new ones to expand our business scope. As a result, we have now established three main pillars: "ground improvement business," "slope disaster prevention business," and "pipeline business."
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