Seismic structuralization of manhole targets in a short time using the 'Magma Rock Method for Manholes'
A technology to improve the seismic structure of non-excavated manhole joint sections with diameters ranging from φ900 to φ1800 in a short time, capable of withstanding Level 2 seismic motion.
This is a non-excavation seismic reinforcement method developed with the aim of converting manhole joints that do not have seismic resistance into a seismic structure in a short period of time. It has water-tight performance that can withstand external water pressure of 0.1 MPa even if joint opening occurs during a level 2 earthquake, and has continuously obtained construction technology review certification from the Japan Sewage Works Agency since 2005. Additionally, by applying and installing it to manhole joints, it is also effective as a countermeasure method when loads equivalent to level 2 earthquake motions act in the lateral direction of the manhole blocks. [Applications] ● Seismic reinforcement of manhole joints
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**Features** - Enhanced seismic resistance at the joint section, excellent water-stopping performance: The compatibility of the stainless steel sleeve and rubber sleeve is improved, demonstrating water-tight performance that withstands level 2 seismic motion at the manhole joint. - Superior durability: The factory-produced stainless steel and rubber sleeves have stable quality, are unaffected by water during installation, and provide long-term durability against aging and chemicals after installation. - Excellent workability: The three-part stainless steel sleeve allows for material transport from the manhole even in large diameters, making assembly and installation inside the manhole easy, ensuring reliable water-tightness in a short time. - Easy traceability: All items have identification numbers engraved, making post-installation traceability straightforward.
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【Purpose】 ●Seismic reinforcement of manhole joints
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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."