Disaster Recovery] 13 Cases of Slope Protection and Three-Surface Channel Works Completed in a Short Construction Period Using Fabric Formwork

There is a method to realize riverbank revetment and slope protection works by forming concrete surfaces in a much shorter construction period than conventional methods. In many cases, concrete casting work is required for disaster restoration of rivers damaged by typhoons, torrential rains, and record-breaking heavy rains. However, this is not always the best method for disaster restoration where a quick response is required, as it is time-consuming, costly, and manpower-intensive, requiring heavy machinery to be brought to the site, wooden formwork to be assembled, and skilled formworkers to be arranged. We introduce “Fabric Formwork TACOM” as a method to solve such problems and enable concrete surface forming work in a short period of time, at low cost, and with a small number of workers. The features of the fabric formwork “TACOM” and examples of slope protection and three-sided waterway construction in which it was actually used are introduced in detail.

What is "Tacom," a fabric formwork that forms a concrete surface in a short construction period?

Fabric formwork “Tacom” is a bag-like mat made of synthetic fiber into which concrete or mortar can be poured. The installation of conventional formwork is unnecessary, and by pouring fresh concrete or mortar into the laid mat, a concrete surface of a certain thickness can be formed easily and in a short period of time.

The installation procedure for fabric formwork “Tacom” is a simple 3-step process

Construction is completed in the following three simple steps and requires no special heavy equipment or skilled labor. Time, cost, and manpower can be reduced.

• Construction Step 1: Laying and Fixing Work (laying and fixing mats)
• Construction Step 2: Pouring (pouring concrete or mortar)
• Construction Step 3: Cleaning Work (washing away spilled concrete, etc.)

(Construction Step 1: Laying and fixing: mats are laid, single pipe is passed through, and fixed with chain blocks) (Construction Step 2: Injecting: concrete is injected by inserting an injection hose into the inlet of the mat) (Construction Step 3: Cleaning: spilled concrete and dirt are washed away with water) Related Information:Slope Surface Download Protection Documents

Four excellent features of fabric formwork “Tacom

While being simple and quick to respond, it has the following four outstanding features and is of such high quality that it can be used for main restoration work rather than temporary restoration.

• Flexible and short construction period (daily construction volume: approx. 300-500m2)
• Versatility in any location (lightweight and adaptable to various terrains)
• High durability (highly durable against waves, water currents, etc.)
• Excellent economy (approx. 6,000 yen per 5 cm thick x 1 m2)

This allows, for example, slope protection works to demonstrate the advantages shown in the following table compared to conventional mortar spraying methods.

Example of slope protection and three-sided channel construction using fabric formwork "Tacom

The following 13 cases in which fabric formwork “TACOM” was adopted for disaster restoration work to achieve full restoration in a short construction period are introduced with photos and summaries.

• Case 1: [Slope protection and three-sided channel construction] Oku-Ohmami disaster restoration (Gifu Prefecture)
• Case 2: [Slope protection and three-sided channel construction] R21 Mitake area disaster restoration (Gifu Prefecture)
• Case 3: [Slope protection work] Slope protection of road bridge abutment (Aichi Prefecture)
• Case 4: [Slope protection and revetment] Slope protection of national highway (Fukui Prefecture)
• Example 5: [Slope covering work] Prefectural road disaster restoration work (Kagoshima Prefecture)
• Example 6: [Railway slope protection work] Disaster restoration work on a railroad line (Aichi Prefecture)
• Case 7: [Three-sided channel construction] Odai natural disaster restoration work (Mie Prefecture)
• Case 8: [Three-sided canal construction] Temporary restoration work for the Yuri Valley disaster (Ishikawa Prefecture)
• Example 9: [Dam revetment] Midorikawa disaster restoration work (Kumamoto Prefecture)
• Case 10: [River revetment construction] Kawauchi River disaster restoration work (Kagoshima Prefecture)
• Example 11: [Slope protection work] Slope disaster restoration work in a privately owned facility (Aichi Prefecture)
• Example 12: [Slope protection work] Circular expressway disaster restoration work (Gifu Prefecture)
• Case 13: [Underwater breakwater construction] Port gap filling repair work (Mie Pref.)

Case 1: [Slope protection and three-sided channel construction] Oku-Ohmami disaster restoration (Gifu Prefecture)

 

Case 2: [Slope protection and three-sided channel construction] R21 Mitake area disaster restoration (Gifu Prefecture)

 

Case 3: [Slope protection work] Slope protection of road bridge abutment (Aichi Prefecture)

*Filter type with a gap at the bottom of the sheet is suitable for slopes with spring water and regulating reservoirs with a water level difference, and can drain spring water from the slope smoothly.

 

Example 4: [Slope protection and revetment work] National highway disaster restoration work (Fukui Prefecture)

 

Example 5: [Slope covering work] Prefectural road disaster restoration work (Kagoshima Prefecture)

 

Example 6: [Railway slope protection work] Disaster restoration work on a main railroad line (Aichi Prefecture)

The mesh type is a grid of mats. It is suitable for road slopes where greening is required, etc. By placing soil or vegetation sandbags inside the frame, it is possible to green the slope surface.

 

Case 7: [Three-sided channel construction] Odai natural disaster restoration work (Mie Prefecture)

 

Case 8: [Three-sided waterway construction] Temporary restoration work for the Yuri Valley disaster (Ishikawa Prefecture)

 

Example 9: [Dam revetment] Midorikawa disaster restoration work (Kumamoto Prefecture)

 

Example 10: [River revetment construction] Kawauchi River disaster restoration work (Kagoshima Prefecture)

Example 11: [Slope protection work] Slope disaster restoration work in a privately owned facility (Aichi Prefecture)

Construction Location	Inuyama City, Aichi Prefecture
Part Number	Mesh type M440
Scale of construction	300m2
Construction Period	August 2010

 

Example 12: [Slope protection work] Circular expressway disaster restoration work (Gifu Prefecture)

 

Case 13: [Underwater breakwater construction] Port gap filling repair work (Mie Pref.)

 

Related information: Download Slope Protection Resources

summary

Using the fabric formwork “TACOM”, slope protection and three-sided waterway construction can be realized at any site with a short construction period, low cost, and a small number of workers. In situations where time, budget, and manpower are limited, such as in disaster restoration work, there are better methods than conventional concrete placement using formwork, and we recommend that you consider fabric formwork “TACOM” as an option. For more information on the fabric formwork “TACOM”, or for direct inquiries to the provider, Taiyo Kogyo Corporation, please refer to the following link.

 

> “Cloth Formwork Tacom” by Taiyo Kogyo Co.

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