丸栄コンクリート工業 List of Products and Services

Our company handles the "Arch Culvert" for high embankments. By using rubber rings at the joints, high water-tightness can be ensured. It also demonstrates flexibility against slight uneven settlement of the ground, eliminating concerns about leakage. Additionally, since the upper part has an arch shape and the lower part has a box shape, the load on the upper part is transmitted as axial compressive force, reducing the bending moments that occur in the upper part and side walls of the members, resulting in high strength. 【Types by Shape】 ■ A Standard: Standard Arch Culvert ■ P Standard: Longitudinally Connected Arch Culvert ■ S Standard: Two-Part Arch Culvert *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Piping materials (concrete pipes)

The "RPCA-DCJ Box Culvert" is a product that ensures high seismic and water-tight performance simply by inserting the inlet into the outlet, equipped with a special rubber ring with a two-layer structure. There are two types, K-type and T-type, which can be used according to the application. The "K-type Flexible Joint Box Culvert" has flexibility in each product, ensuring sufficient water-tight performance, while the "T-type Seismic Joint Box Culvert" has seismic performance that can withstand level 2 earthquake motions. 【Features】 ■ The special rubber ring has a two-layer structure with a soft rubber base material covered by hard rubber on the outside. ■ High water-tight performance can be secured simply by inserting the inlet into the outlet. ■ Internal joint work can be omitted, providing excellent workability. ■ Certified product by the Japan Precast Concrete Products Technology Association. *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Piping materials (concrete pipes)

The "MC Hole" is a modular rectangular manhole used for the maintenance and management of box culverts buried underground. The opening size of the installation pipe block can be adjusted to match the size of the installation pipe. The internal dimensions are standardized in ten sizes ranging from 1200×1200 to 3500×1500. Since it is made of precast products, it can shorten construction time compared to on-site casting, and it can also withstand seismic motions at seismic design level 2. 【Features】 ■ Manhole used for the maintenance and management of box culverts buried underground ■ Shortens construction time compared to on-site casting due to the use of stacked precast products ■ Internal dimensions standardized in ten sizes from 1200×1200 to 3500×1500 ■ Opening size of the installation pipe block can be adjusted to match the size of the installation pipe ■ Seismic joints are possible at the joints ■ Can withstand seismic motions at seismic design level 2 *For more details, please refer to the PDF document or feel free to contact us.

• Manhole body
• Water Supply Facilities

We handle the "RPCA - National Box Culvert Association Type." It complies with the Road Earthwork Culvert Construction Guidelines of the Japan Road Association and is certified as Class I materials by the Japan Sewage Works Association. The "RC type" is available as a Class I certified product under JIS A 5372, while the "PC type" is available as a Class I certified product under JIS A 5373. 【Features】 ■ Standard products of the National Box Culvert Association ■ Class I certified materials by the Japan Sewage Works Association ■ Compliant with the Road Earthwork Culvert Construction Guidelines of the Japan Road Association ■ Products that meet the evaluation standards of the Japan Precast Concrete Products Technology Association *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Piping materials (concrete pipes)

Maruei Concrete Industry handles the "RPCA-Box Culvert." It is a product that meets the standards set by the Japan Precast Concrete Products Association and is our original standard product. We offer a variety of sizes in our lineup. Please feel free to contact us when you need assistance. 【Design Conditions】 ■ Live Load: T-245 ■ Unit Weight of Soil: W = 18 kN/m3 ■ Soil Pressure Coefficient: K = 0.5 ■ Standard Soil Cover: 0.2 to 3.0 m *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Piping materials (concrete pipes)

This catalog introduces "Box Culverts and Large Box Culverts." It features various products, including the "MC Hole," a manhole used for the maintenance and management of box culverts buried underground, and the "Arch Culvert," which ensures high watertightness by using rubber rings at the joints. Please make use of this for selecting products. [Featured Products (Partial)] ■ RPCA - National Box Culvert Association Type ■ MC Hole ■ RPCA-DCJ Box Culvert ■ Arch Culvert ■ C.C. BOX Joint Utility Trench *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Piping materials (concrete pipes)
• Water and sewerage pipe fittings

In this catalog, we introduce various products handled by our company. In 1925, Tanahashi Shoten was established in Hashima City, Gifu Prefecture, as a manufacturer and contractor of cement tiles. For nearly a century since our founding, we have been pioneering new fields, primarily focusing on "U-shaped prefabricated waterways" through the creation of various products. Without forgetting our origins, we will continue to take new strides toward the next stage. 【Contents (partial)】 ■ Box culverts / Large box culverts ■ Retaining walls ■ Storage ■ Waterways ■ Ditches *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Piping materials (concrete pipes)
• Retaining wall

**Features** - It allows for easy transportation and installation in locations where truck cranes cannot be used, such as under elevated roads and railways, under power lines, or in areas where temporary roads cannot be constructed. - As a self-propelled device that does not require special guides for the foundation concrete, it can be used for construction in curved sections and at bends. - It can accommodate slope construction in the longitudinal direction up to 10% (5% for lift rollers), and it is also capable of handling drop sections. - Concrete products are transported to the installation site, and adjustments in the vertical and horizontal directions are made using hydraulic cylinders, allowing for precise positioning. - The lift rollers are electric, resulting in low noise and low vibration, minimizing impact on the surrounding area. - In locations where tree removal would be necessary for crane construction, it can be installed without cutting down trees, demonstrating consideration for the natural environment. - It can widely accommodate products such as box culverts, three-sided ditches, L-shaped ditches, inverted T-shaped products, and slabs. - We offer "hanging type" (internal suspension) and "side type" (external suspension) options to suit site conditions. *For more details, please download the PDF or feel free to contact us.*

• Special Construction Method

The "Parapet L-Type" is a revolutionary product that enables the construction of special embankments (breast walls) by being installed at the top of the levee. Since it can be handled with land-side work, it improves safety, and also eliminates the need for formwork assembly and removal, thus shortening the construction period. Additionally, it contributes to resource conservation by reducing the amount of formwork needed. 【Standard Structure】 ■ Bedding mortar or grout material ■ Foundation concrete ■ Foundation material *For more details, please download the PDF or feel free to contact us.

• Embankment

With the development of residential land and other projects, it is necessary to install retention basins to prevent the decrease in safety levels in downstream areas due to increased flood flow in rivers. The "Open-Type Retention Basin II" is a product that serves as a storage facility to mitigate road flooding and residential inundation caused by urbanization in river basins. It is easy to maintain after construction. Additionally, since the bottom slab is constructed on-site, it is possible to create pit areas and drainage slopes. 【Design Conditions】 ■ Superimposed Load: Q=10kN/m2 ■ Unit Weight of Soil: W=18kN/m3 ■ Internal Friction Angle of Soil: Φ=30° ■ Soil Pressure Calculation: Trial Wedge Method ■ External Water Level: Hw = Total Height / 2 *For more details, please download the PDF or feel free to contact us.

• Rainwater infiltration facilities

The "RPCA-AD Wall" is a precast rigid protective fence retaining wall that eliminates the need for dangerous tasks such as rebar assembly and formwork installation at heights, thereby improving safety on site. There are two types available: a 250mm thick type and a 300mm thick type that allows for the installation of sound barriers and other structures. Please feel free to contact us if you have any requests. 【Construction Procedure】 1. Delivery of the product 2. Installation of the product 3. Backfilling and paving *For more details, please download the PDF or feel free to contact us. # L-shaped retaining wall # Ramp # Rigid protective fence # Sound barrier # PCa # Precast

• Concrete Retaining Wall

The "DCJ Box Culvert" is a box culvert that ensures high seismic and watertight performance simply by inserting the inlet with a special rubber ring featuring a two-layer structure into the outlet. It allows for the omission of internal joints, resulting in excellent workability. Additionally, by absorbing ground displacement at each joint of the product, it reduces the stress generated in the structure and minimizes the amount of pull-out and bending angles at each joint. 【Features】 - Available in two types: K-type and T-type, allowing for differentiation based on application. - The special rubber ring excels in followability, compression recovery, and wear resistance, maintaining high watertight performance (0.06 MPa) even during pull-out due to seismic motion or after bending. - Certified product by the Japan Precast Concrete Products Technology Association. *For more details, please download the PDF or feel free to contact us.

• Piping materials (concrete pipes)

There are III type, national box culvert association standard type (RC, PC), DCJ box culverts, two-part type, long-span culverts, and free-angle type box culverts.

• Dam construction

Underground type NETIS registration number KT-010138-A

• Flood prevention facilities, fire tanks, and flood control ponds

Seismic-resistant water storage tanks [40m³, 60m³ to 100m³] Our products are certified products that comply with the secondary product fire water tank (40m³) and secondary product seismic-resistant water storage tanks [40m³ type, 60m³ type, and 100m³ type] conducted by the "Japan Fire Equipment Safety Center," designated by the Fire and Disaster Management Agency as a subsidized project. The products are available in Type I and II standalone types and Type I and II shared types. Type I is installed underground in locations such as parks and residential areas where vehicles are unlikely to enter, subjected to a uniformly distributed load of 10 kN/m², while Type II is installed underground in other locations, subjected to a total weight of 200 kN from vehicle loads.

• Flood prevention facilities, fire tanks, and flood control ponds

Our box culverts are widely used in public works such as urban drainage systems, agricultural drainage ditches, underground pedestrian passages, and road crossing culverts, as well as in large-scale residential developments and factory site construction. 【Features】 ○ The box culverts include Type III, national box culvert association standard types (RC, PC), DCJ box culverts, two-part types, long-span culverts, and free-angle types. ● For other functions and details, please contact us.

• Water Supply Facilities

The DCJ box culvert can achieve high seismic and water-tight performance simply by inserting the "inlet" equipped with a two-layer structure special rubber ring into the "outlet." Additionally, it excels in workability as the internal joint work can be omitted. The special rubber ring features a two-layer structure, with a soft rubber base covered by hard rubber on the outside, which provides excellent followability, compression recovery, and abrasion resistance, maintaining high water-tight performance (0.06MPa) even during extraction due to seismic motion or after bending. For more details, please contact us or refer to the catalog.

• Water Supply Facilities

TS Freum (Seismic and Water Stop Type) adopts the TSKJ method for its product joints, achieving excellent water-stopping performance. It also follows changes in the ground and absorbs excessive deformation. You can freely choose from a wide range of sizes. For more details, please contact us or refer to the catalog.

• Water Supply Facilities

"Protech Wall" is a product that enables the construction of retaining walls exceeding a height of 5.0 meters by pouring core concrete inside the product. It is self-supporting, excels in workability and stability, and allows for a reduction in construction time. 【Features】 ○ By pouring core concrete inside the product, a sturdy retaining wall can be constructed. ○ Since the product is self-supporting, it excels in safety and workability, leading to a reduction in construction time. ○ As there is no need for formwork installation and removal, labor savings and cost reduction can be achieved. ● For other functions and details, please contact us.

• Dam construction

The roadside ditches are installed along urban and rural roads, transforming them into wide roads that can accommodate vehicle traffic. There are two types of culverts, a two-part type consisting of a main body and a slab, with load capacities of 137 kN and 196 kN. 【Features】 ○ Being a two-part type allows for flexible configuration of open and closed channels. ○ Maintenance and management within the waterway are easy. ○ It is also possible to change an open channel to a closed channel later on. ● For other functions and details, please contact us.

• Gutters and U-shaped gutters

It is widely used for general civil engineering, agricultural civil engineering, and private facilities. Our "Three-Sided Water Channel" has received high praise and has an overwhelming delivery record nationwide. 【Features】 ○ You can freely choose from a wide range of sizes. ○ It has a stable structure and exceptional durability. ○ It is lightweight and allows for speedy construction. ● For other functions and details, please contact us.

• Water Supply Facilities