箱型擁壁研究所 List of Products and Services

We would like to introduce our construction case study, "Embankment Edition." The box-type retaining wall is designed with consideration for seismic activity, regardless of wall height. Compared to conventional methods, the vertical earth pressure acting on the foundation base is also smaller, allowing it to function well even on less-than-ideal foundation ground. 【Case Overview】 ■ Location: Embankment ■ Method: Box-type retaining wall ■ Design considering seismic activity implemented ■ Vertical earth pressure acting on the foundation base is small, allowing it to function well even on less-than-ideal foundation ground *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Aging Edition." Box-type retaining walls can be constructed continuously over multiple years. Additionally, by allowing rainwater and back seepage to pass through and drain appropriately within the wall body, stable greening can be sustained in sites where vegetation has been established. 【Case Overview】 ■ Condition: Aging ■ Construction Method: Box-type Retaining Wall ■ Can be constructed continuously over multiple years ■ By allowing rainwater and back seepage to pass through and drain appropriately within the wall body, stable greening can be sustained in sites where vegetation has been established. *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Waterfront Edition." The box-type retaining wall uses single-sized crushed stone as the wall material, which provides high drainage performance and is less likely to generate residual water pressure. It is suitable for applications such as rivers and lakes. 【Case Overview】 ■ Location: Waterfront ■ Construction Method: Box-type Retaining Wall ■ Uses single-sized crushed stone as the wall material ■ High drainage performance and less likely to generate residual water pressure *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Cutting Earth Edition." Box-type retaining walls do not require the selection of counterfort lengths based on earth pressure conditions. They can achieve higher wall heights than conventional methods using only box units and uniformly graded crushed stone. This method particularly minimizes excavation volume and is environmentally friendly. 【Case Overview】 ■ Location: Cutting Earth ■ Method: Box-type retaining wall ■ No need to select counterfort lengths based on earth pressure conditions ■ Achieves higher wall heights than conventional methods using only box units and uniformly graded crushed stone ■ Minimizes excavation volume and is environmentally friendly *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Curved Edition." Box-type retaining walls can accommodate concave curves as well as standard convex curves with a radius of 20m or more. Additionally, for curves with a radius of 20m or less, construction can be adapted by reversing the product. This allows for the construction of retaining walls with beautiful curves. 【Case Overview】 ■ Shape: Curved ■ Method: Box-type retaining wall ■ Accommodates concave curves and standard convex curves with a radius of 20m or more ■ For curves with a radius of 20m or less, construction can be adapted by reversing the product ■ Allows for the construction of retaining walls with beautiful curves *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Longitudinal Slope Edition." Box-type retaining walls can be constructed to accommodate longitudinal slopes of up to approximately 12%. When constructing according to the longitudinal slope of the road, especially at tunnel entrances and curved sections, it is expected to improve line-of-sight guidance and reduce visibility obstructions. 【Case Overview】 ■ Location: Longitudinal Slope ■ Method: Box-type Retaining Wall ■ Can be constructed to accommodate longitudinal slopes of up to approximately 12% ■ Expected to improve line-of-sight guidance and reduce visibility obstructions *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Greening Edition." The box-type retaining wall provides landscaping that takes into consideration aesthetic appeal based on various planting experiments. We look forward to your inquiries regarding planting. 【Case Overview】 ■Purpose: Greening ■Method: Box-type retaining wall ■Provides landscaping that considers aesthetic appeal based on various planting experiments *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Special Edition." The box-type retaining wall has a simple structure consisting of a box body and wall material (uniformly graded crushed stone), making it adaptable to various site conditions. Please feel free to contact us if you have any inquiries. 【Case Overview】 ■ Shape: Special ■ Construction Method: Box-type retaining wall ■ Simple structure consisting of a box body and wall material (uniformly graded crushed stone) ■ Adaptable to various site conditions *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Land Development Edition." The box-type retaining wall is constructed in a stepped manner, which eliminates a sense of pressure and features a visually appealing temple slope shape. It is suitable for retaining walls in places where people interact, such as residential areas and schoolyards. 【Case Overview】 ■ Location: Land Development ■ Method: Box-type retaining wall ■ Constructed in a stepped manner to eliminate a sense of pressure ■ Visually appealing temple slope shape *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction

We would like to introduce a construction example we have carried out, titled "Mountain Edition." Unlike typical concrete retaining walls, box-type retaining walls are stepped, allowing them to blend more naturally into the environment. Additionally, the small steps serve as pathways for small animals and wildlife, contributing to the preservation of the ecosystem. 【Case Overview】 ■ Location: Mountain ■ Method: Box-type retaining wall ■ Stepped design allows for better integration with nature ■ Contributes to ecosystem preservation *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Disaster Recovery Edition." Box-type retaining walls do not use ready-mixed concrete, allowing for significant reductions in construction time. They are suitable for disaster recovery work where early restoration of lifelines and living environments is necessary. [Case Overview] ■ Purpose: Disaster Recovery ■ Method: Box-type Retaining Wall ■ Does not use ready-mixed concrete ■ Allows for significant reductions in construction time *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

We would like to introduce our construction case study, "Tunnel Portal and Bridge Pier Edition." Box-shaped retaining walls finish neatly at the ends, making them suitable for challenging areas such as tunnel portals and bridge piers. Additionally, the area near the tunnel portal can be dangerous for animals, but the small step section can serve as an emergency escape spot. 【Case Overview】 ■ Location: Tunnel Portal and Bridge Pier ■ Construction Method: Box-shaped Retaining Wall ■ Neat finishing at the ends and other areas ■ Suitable for challenging tunnel portals and bridge piers *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

The location for the retaining wall block installation faces the parking lot of a sports club frequented by a large number of people, emphasizing the importance of securing the landscape and safety for the future. Initially, conventional methods such as L-shaped retaining walls and reinforced earth walls were considered. However, it was pointed out that vertical walls could create a sense of oppression and that the concrete surface of the sliding face gives an inorganic impression. Concerns were also raised about the anxiety associated with deformation in the case of reinforced earth walls. On the other hand, the box-type retaining wall was adopted due to its gentle impression created by the stepped design, the ability to incorporate planting, and its high safety evaluated based on seismic resistance verification at the Public Works Research Institute and experiences from the Chuetsu earthquake. Additionally, since the construction took place in an area where a pond once existed, ground improvement and enhancement of the fill material were also carried out to ensure overall stability due to the embankment. 【Case Overview】 ■ Location: Retaining wall block installation area facing the parking lot of a sports club ■ Method: Box-type retaining wall ■ Provides a gentle impression with a stepped design and allows for planting ■ Ground improvement and enhancement of fill material were also implemented to ensure overall stability due to the embankment *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

The project for the development of the JR Minakuchi Station Front Park was carried out. For the large radius (R), type A was used to achieve full greening up to the fourth step, incorporating Green Cup A8 in the product, and using a φ300 drainage pipe at the product joint. For the small radius, type B was used (with some inversion), and a φ300 drainage pipe was utilized for greening. This site effectively showcased the advantages of curved construction, allowing for a beautiful representation of two different radii. 【Project Overview】 ■ Purpose: Development project for JR Minakuchi Station Front Park ■ Construction Method: Box-type retaining wall ■ Large radius used type A, small radius used type B ■ Leveraged the advantages of curved construction to beautifully express two different radii *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

Our company has a track record of road improvement construction. Box-shaped retaining walls, based on various experiments, show that the vertical earth pressure acting on the foundation ground is smaller compared to rigid cantilever retaining walls, similar to the shear stress occurring in the retaining wall, making them advantageous from the perspective of ensuring bearing capacity. Additionally, the structure that acts in a well-balanced manner, as demonstrated in experiments, is effective even on non-stable foundation grounds. In regions with high annual rainfall, box-shaped retaining walls with high drainage performance are an essential construction method. Furthermore, their excellent seismic resistance has been verified through experiments and real phenomena. 【Case Overview】 ■ Purpose: Road improvement construction ■ Method: Box-shaped retaining wall ■ In regions with high annual rainfall, box-shaped retaining walls with high drainage performance are an essential construction method ■ Their excellent seismic resistance has also been verified through experiments and real phenomena *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction

In the year 2000, during the restoration of the castle walls at Fukuchiyama Castle Park in Kyoto Prefecture following a disaster, Tanba stone was used to restore the historically significant temple-style stone walls, aiming for restoration through traditional civil engineering methods known as Anō-zukuri. A box-type retaining wall was adopted as a combined method that receives earth pressure from the back, excelling in safety, constructability, cost-effectiveness, and drainage. The box-type retaining wall was constructed by stacking using the small step sections of the box, allowing for sufficient securing of installation locations for Tanba stone and workspaces, which greatly contributed to the planning of a safe and swift restoration construction process. [Case Overview] - Purpose: Restore the historically significant temple-style stone walls - Method: Box-type retaining wall - Sufficient securing of installation locations for Tanba stone and workspaces is possible - Greatly contributes to the planning of a safe and swift restoration construction process *For more details, please refer to the PDF document or feel free to contact us.

• Foundation construction

Box-type retaining walls are a construction method that involves filling a bottomless precast concrete frame (box) shaped like a box with single-sized crushed stone (wall material) around S-40, compacting it in layers using a rammer, and stacking it in a stepped manner. Since single-sized crushed stone is used as the wall material, it has high drainage performance, and the interlocking of the crushed stone provides high shear resistance, resulting in excellent seismic performance. 【What are the differences and effects compared to conventional methods?】 In traditional large block masonry, the length of the buttress is selected according to soil pressure conditions, but with the box type, this is not necessary. It can construct higher walls using only the box (L-type A) and single-sized crushed stone wall material, achieving greater wall heights than conventional methods. Additionally, especially when exceeding a height of about 7 meters, it becomes particularly economical, reducing construction time by more than 40% compared to conventional methods, leading to significant time savings. Since it does not use ready-mixed concrete, it allows for rapid progress in disaster recovery work. Currently, we are offering a collection of construction case studies featuring photos of box-type retaining wall projects! The case study collection includes detailed examples of road improvement works and park development projects, as well as a case of restoring a castle's stone wall. *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction

The "Box-Type Retaining Wall Method" demonstrates seismic resistance during earthquakes by the strong interlocking of the wall constructed from a box structure and uniformly graded crushed stone. The supporting ground functions well even if the soil is relatively poor. Additionally, uniformly graded crushed stone is used as the foundation and filling material, allowing for immediate drainage of spring water from the backfill soil and rainwater entering the small steps outside the wall. 【Features】 ■ High drainage performance ■ High shear resistance and excellent seismic performance ■ Capable of constructing higher walls than conventional methods ■ Enables rapid disaster recovery work as it does not use ready-mixed concrete *For more details, please download the PDF or feel free to contact us.

• Renovation and repair methods
• Earthquake-resistant construction method
• Special Construction Method