エムシーエム List of Products and Services

The "PF Mortar Spraying System" can be constructed according to the required amount on-site, making it possible to implement a compact and simple system when needed. It offers high strength, easy operation, and the ability to spray in areas with water inflow. Low dust and low rebound spraying can be achieved in a compact manner. This system can be used for spraying in small cross-section tunnels, primary spraying reinforcement in unconsolidated ground, and for repair and widening work in existing tunnels. 【Benefits of Implementation】 ■ High strength, easy operation, and capability to spray in areas with water inflow ■ Can be constructed according to the required amount on-site ■ Can be implemented when a compact and simple system is needed *For more details, please feel free to contact us.

• Renovation and repair methods
• Civil Engineering Method
• Tunnel construction

The "TDR Shot Lining System Method" is a secondary lining construction system for shield steel segment sections. It responds to needs such as "wanting to fill steel segments in shield tunnels with sharp curves," "wanting to shorten construction time," and "wanting to increase construction speed." By introducing this method, it can accommodate sharp curve sections that are difficult to construct with conventional methods, and it can fill various areas of steel segments, achieving high density. 【Benefits of Implementation】 ■ Achieved approximately 1.7 times construction progress - T Construction Co. ■ Able to handle sharp curve sections that are difficult to construct with conventional methods ■ Can fill various areas of steel segments, resulting in high density *For more details, please refer to the related links or feel free to contact us.

• Renovation and repair methods
• Civil Engineering Method
• Tunnel construction

We would like to introduce a case study of the "TDR Shot Lightning System." This method can easily accommodate special shapes and structures. It can fill every corner of the steel segments, achieving high density. In the sewer pipe and machine remnants (underground joints) of the second Toyama trunk line construction, it was applied with a finished inner diameter of 2400mm and a total length of 20m. 【Features of the Method】 ■ Accommodates various sharp curves ■ Easily adapts to special shapes and structures ■ Materials can be selected according to the tunnel's purpose ■ Fast construction speed ■ Easy maintenance ■ Excellent economic efficiency and shortened construction period *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method

The "TDR Shot Lining System" is a technology based on a wet spraying method of high-performance mortar for the repair of deteriorated concrete cross-sections. It was developed to fill the gaps between steel segments and the finished surface of the lining, which are expected to be difficult to address with conventional cast-in-place lining concrete. By using a continuous mixing mixer, it enables large-volume mortar spraying. 【Features】 ■ Can accommodate various sharp curves ■ Easily adapts to special shapes and structures ■ Materials can be selected according to the tunnel's application ■ Can fill every corner of the steel segments, achieving high density ■ Fast construction speed *For more details, please refer to the related link page or feel free to contact us.

• Special Construction Method

The "Disaster Recovery Tunnel Repair Spraying Construction System" achieves low dust and low rebound through the synergistic effect of liquid quick-setting agents and Denka PF mortar. Denka PF mortar has high compressive and flexural strength, and its toughness is also improved. It has good adhesion and can be sprayed even in areas with water inflow. With the push of a button, automatic spraying is possible, making operation and cleaning simple, and it can be constructed using only the compact M-PAC (spraying system). 【Features】 ■ Low dust and low rebound ■ High strength ■ Easy operation ■ Compact ■ Pre-mixed *For more details, please refer to the PDF materials or feel free to contact us.

• Earth retaining wall/foundation reinforcement

The "Subshot System" continuously supplies special fiber-reinforced mortar "Denka PF Mortar" using a mixing pump and combines it with a liquid quick-setting agent "Denka Subshot L" to enable continuous spraying construction from the rear carriage of a TBM (Tunnel Boring Machine) and other equipment. This allows for rapid construction, reduction of underground work, and improvement of the working environment. Additionally, it minimizes material loss during mixing and kneading, reduces rebound, and decreases dust. 【Features】 ■ Continuous spraying construction from the rear carriage ■ Enables rapid construction, reduction of underground work, and improvement of the working environment ■ Minimal material loss during mixing and kneading ■ Reduces rebound and decreases dust *For more details, please refer to the related link page or feel free to contact us.

• Systems Architecture

"Denka PF Mortar TYPE-K" is a pre-mixed mortar that combines special admixtures, finely graded fine aggregates, and high-quality fibers. It is mixed and pumped using a continuous mixing pump. A dedicated acidic liquid quick-setting agent, "Denka Subshot K," is added at the nozzle tip and sprayed using a special spraying nozzle. Additionally, you can view examples of PF mortar applications and achievements based on different uses, so please feel free to contact us when needed. 【Features】 ■ The incorporation of high-quality fibers improves bending strength, reduces brittleness, and enhances toughness. ■ Excellent quick-setting properties are achieved. ■ Superior initial and long-term strength are obtained. ■ Excellent low dust and low rebound spraying is possible. ■ The acidic liquid quick-setting agent used is safer for the human body compared to conventional alkaline liquid quick-setting agents. *For more details, please refer to the PDF materials or feel free to contact us.

• Mortar and plaster materials

We would like to introduce our large-capacity electric dust collector for tunnel excavation work, the "Eco Clean X." Based on the accumulation of know-how cultivated at construction sites, we have independently developed a more user-friendly and efficient electric dust collector. We have changed the method from the conventional discharge wire to applying high voltage to newly developed discharge plates to generate corona discharge. Since the discharge plates do not wear out, we have achieved a reduction in running costs and resolved issues related to wire breakage. 【Features】 - Elimination of discharge wires and replacement with plates - Low power consumption - Equipped with a deionization device (reverse charging device) - Constant airflow for processing - Easy installation *For more details, please refer to the PDF document or feel free to contact us.

• Garbage disposal, central dust collection, laundry, compressor

The "Eco Station System" is a vacuum collection and ventilation system for tunnel excavation work, integrated with a self-propelled crawler cart, dust collector, and telescopic duct. It is composed of an electric dust collector, a self-propelled crawler cart, and a telescopic duct. Since the system is not suspended from the tunnel ceiling, it does not obstruct the lighting sources in the tunnel, ensuring adequate illumination and good visibility, which contributes to safe operations. 【Features】 - There is no risk of the system falling from the tunnel ceiling due to contact with heavy machinery booms, as it is not suspended. - There is no need for unsafe high-altitude repositioning. - It does not obstruct lighting sources, ensuring adequate illumination and good visibility for safe operations. - It can be moved to various dust generation work points throughout the tunnel for dust collection. *For more details, please refer to the related link page or feel free to contact us.*

• Tunnel construction

The "Preload Shell Method" is a subsidence suppression auxiliary system that integrates the ground and the support structure by setting a bag (jacket) between them and injecting non-shrink mortar into the bag, thereby ensuring reliable support capacity. The "Preload Jacket" is a bag made of seamless tubular fabric equipped with an injection port with a check valve, allowing for easy injection work due to the presence of the check valve. Additionally, the "Preload Mortar" is a premixed type of rapid-setting filling material (Denka Preload Mortar) developed for the Preload Shell Method. You can also view materials regarding construction procedures and adoption results. Please feel free to contact us when needed. 【Features】 ■ Revolutionary subsidence suppression method ■ A bag is set between the ground and the support structure, and non-shrink mortar is injected into the bag ■ The support structure and the ground are integrated, demonstrating reliable support capacity *For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Method

The "M-Cool" is an energy-saving cooling device that generates cool air by directly exchanging heat between spring water and hot air using a radiator. It can be loaded onto a 2-ton truck, making it easy to transport and retreat near the work site. The cool air directly affects the workers, lowering their perceived temperature. By applying this product, the underground temperature of 30-32°C can be cooled to below 28°C, and it can discharge air at a speed of over 4 m/s, providing an ideal underground environment. 【Features】 ■ Low power consumption without using a chiller ■ Compact and mobile ■ Large air volume of 1,000 m³/min ■ Easy installation ■ Maintenance-free *For more details, please refer to the PDF document or feel free to contact us.

• Ventilation system