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).

Sewerage facilities