Rock Gabion Composite


Rock gabion composite is a material bag made of fiber which is called “ECOPET®” recycled from PET bottle. This product has lightweight, high durability and environmentally friendly. Rock gabion was proposed to use to protect river bank, abutment, and block the flood. “ECOPET®” is business registration name of TEIJIN FIBERS Co., Ltd.

1. Features

§  It is made of specific chemical fiber and able to prevent corrosion

§  Raschel netting structure and hard to get broken and loose.

  • It has also double net structure and makes it even harder spread out the rocks.
  • Flat mouth and hard to catch floating wreckage
  • Crushed concrete can also be used instead of rocks.
  • Easy to handle by machines. No need to have skilled special skilled worker  

2. Installation process


EPS construction method is applied for the first time in 1972 in Norway, is a lightweight solution using polystyrol replacement land. Since it was introduced in Japan in 1985, there have been many practical applications. ·In Japan established EDO associations and uniform design criteria, construction methods and materials quality standards.



Lowering the management/maintenance fees

Shortening the construction duration

Reducing the land consumption

Benefiting to save total construction cost by such as lowering volume of excavation…


A consistent wall is formed on the pile-up. Due to its poison is approaching to zero (0), the constructive structure against earth pressure for protection is easily to achieve, such as retaining wall.

Light material It especially functions to bases with poor bearing capacity for the density is around 1/100 of which of the sand-soil and concrete. Labor forces are enough for construction

Buffering function

Such independent bubble structure has excellent buffering function that could significantly reduce the impact and vibration.

Water proof ability

EPS is an independent bubble structure, with difficulties in water absorption and stabilities in material features.

Easy construction

Labor forces are only required, without necessity of heavy construction machines, due to its feature as a light material. Therefore, the construction is faster and easier.

Environment protection

Zero hazard materials.

None of HBCD, CFC

Outstanding achievements

In Japan, 400 million m3 has been applied during 21 years from the year 1985 until now. A lot of achievements in solid practices also are seen in overseas.

In-situ tests

Lab tests (full scale vibration)

Our projects:

Horizontal Land Expansion (with steep slope on ground):

•  Client: Ehime-ken, Japan

•  Construction Date: March, 2002

•  Construction volume: D-20 3000m3

EPS construction method is applied in attempt to control the curve element, a potential cause to sliding, within minimal effects.

Due to EPS construction method, the construction cost is cut by cancellation of supporting construction that is not necessary anymore. Heavy construction machines are excluded since labor forces are good enough for EPS construction method. This is a significant benefit.

Horizontal Land Expansion (Slope, with Green Engineering)

• Construction site: Shibata-gun, Miyagi-Ken, Japan

• Construction Date: October, 2000 • Construction Volume: D-20, 1100m3

Road with soft ground soil (Horizontal Land Expansion)

•  Construction site: Sapporo-shi, Hokkaido, Japan

•  Construction date :2003 to 2004, Jan.

•  Construction volume: D-25 1,530m3  

DX-29 110m3

•   Construction site: Yamaguchi-Ken, Japan

•   Construction date: May, 2005

•   Construction volume: D-25 230m3  

Solution against Buoyancy

•   Construction site: Aomori-ken, Japan

•   Construction date: Jun, 2002

•   Construction volume: D-20 1,500m3   •   CW 1,300 m3

Abutment (the side facing ground), Reconstruction of Highway

•  Construction site: Miyagi-Ken, Japan

•  Construction date: Feb., 2003 •  Construction volume: D-20 1,722m3

Land filling for railway

• Construction site: Aichi-ken, Japan

• Construction date: May, 1999       

• Construction volume: D-20 2500m3

March 27, 2019 GeotechnicalProducts0

Composite Rockbags have been successfully installed for an old bridge in North West England region by contractors. The Composite Rockbags were utilised to provide scour protection on four bridge piers and helping protect the structure from tidal waters as well as allowing the river environment to develop. The Composite Rockbag is simply a stone filled mesh net rock bag which can be utilised as a long-lasting solution for the protection of subsea foundations and cables.  They are a recognised advanced solution to concrete mattress and rock dumps.  The Composite Rockbags are designed to encase the stone location, therefore are a long-term protection solution that omits future remedial works.  They are made from 99% recycled polyester (PET) and available in 3 sizes 2, 4 and 8 tone.

Composite Rockbags Application

They are a simple versatile product constructed of mesh net and filled with rocks, used for preventing flood and bridge scour, and protecting offshore cables and pipelines. The Rockbags are easy and cost effective to both fill and install in routine or emergency situations. They blend into the natural environment by allowing plants and marine life to live within the interstices inside the units.

Infrastructure (DFI) (western region) have been surveying a considerable number of bridges in the counties of Londonderry and Tyrone. Several bridges were significantly scoured therefore requiring scour protection to be installed to prevent further erosion. Installed by DFI’s preferred contractor on several bridges to date, Composite Rockbags have again proven to offer a more versatile option than traditional methods, especially for bridges with restricted access. During this sequence of bridge protection works the filter unit rock bags were filled on site, easily lifted and manoeuvred into position with reduced plant machinery making it a very versatile and cost-effective method. Made from 99% recycled polyester and filled with locally sourced river cobble stone, the product offers a more environmentally friendly solution that is proven to harness that natural marine environment. Equipped with its bespoke one-point lifting ring it allowed scour protection to be accurately placed next to the exposed bridge foundations easily adapting to the local river bed topography


March 26, 2019 GeotechnicalProducts0

Teno Column and steel pipe with wings will combine to form a unity, thank to that the bearing capacity is much greater, ATT Column preform high bearing capacity and especially in weak geology. The ATT Column is a hybrid pile that combines the highly reliable Teno-Column method “column” with “vane steel pipe” that has adopted the screw pipe EAZET-II TECHNOLOGY. These columns provide high bearing capacity because they unify column sand vane steel pipe.

 According to statistics from 2002, there are more than 3000 projects in Japan have been developed by applied ATT Column. Furthermore, ATT Column is also an environmentally friendly column that has low vibration and noise, and produces little waste soil.

Steel pipe with wings was developed from “EAZET-II” technology (Screw Pile Technology)”

ATT column

Construction processes

Construction using ATT Column divides into 2 stages as following

1. ATT Column construction stage.

–  The method of treating deep layer by the machine will not make the surrounding ground and the top of the column weaker.

–  Always ensure the mobility while non-frozen column until consolidation.

2. steel pipe with wings construction stage.

–  Steel pipe with wings have easily constructed and ensure the unity of the column. –  Because of using the steel pipe that sealed up at its head, when steel pipe with wings is rotated to bury into the pile, it will compact the mixture of cement and earth. As a result, there is no earth incurred which need to dig and move away.

ATT Column Features

High Capacity for Vertical Loads

Steel pipe with wings will combine with Teno-column to transmit loads effectively, so ATT Column is capable of withstanding large vertical loads.

High horizontal load capacity

Teno-column and steel pipe with wings will combine together to form a unity, therefore, the horizontal load capacity will be increased.


Construction in urban or narrow areas

Easy in quality and pile head controling

Low vibration and low noise

Low vibration and noise are attended through the column and vaned-steel pipe method. The surrounding area is unaffected by construction noise and vibrations

Low waste soil

Standard dimensions for ATT Column

Load Capacity

ATT Column has great load capacity by the combination between construction method and materials. The combination of the ground reinforcement by mixed depth treatment method and application of the rotation construction method to put the steel pipe into body of the Teno-column will help the loads which are transmitted effectively from steel pipes to Teno- blades and then through pipes, ground. Besides, depth mixing treatment method will allow to construct the Teno-column without making the soil weaker. Moreover, when rotating to bury the steel pipe, result in more compaction between pile and surrounding soil. Thank to rotating blades, steel pipe and cement pile can combine to rigid form. Finally, due to the consolidation of soil and cement, pile and surrounding soil will combine into a block, therefore, increasingly the vertical load capacity.


March 26, 2019 GeotechnicalProducts0

Tenocolumn method is a technology to stabilize soil by forming a column of soil hardened with a binder. This method has been applied in more than 33,000 projects (excluding residential houses), winning a high reputation for its quality and reliability

1. Overview of the Tenocolumn methods.

TENOCOLUMN is high-quality soil cement column produced by mixing cement slurry with in-situ ground soil. This method has experienced over 3,000 projects and received high evaluations.TENOCOLUMN is a soil cement that is applied by mechanical mixing method. Cement and mortar are sprayed into the soil by pressure pumps and then mixed with soil.

Mortar and cement are prepared with reasonable water and cement weight and then they are mixed by machine to ensure stable quality. Soil-cement has constructed which will be increased the strengthen and durability by automatic hard reaction, to ensure the superstructure long-term.

2. Characteristics of TENOCOLUMN

1. High Quality TENOCOLUMN is a high-quality and high-strength column through the efficient mixing and execution management.
2. Safety Construction Mechanization reduces dangerous works.
3. Speedy & Cost-effective Construction Economical and shorter-term completion results from prompt effect of improvement.
4. Multi-Application TENOCOLUMN is applicable to any soil condition like sandy soil, highly viscous clay, loam, unsolidified peat and so on.
5. Pollution-free Construction This low-vibration and low-noise method has less pollutive procedures and is free from secondary pollution.

3. Experimental data

As proof for the high quality of TENOCOLUMN, many tests have been carried out at project sites in Japan. All the test results are satisfactory with the quality and bearing capacity requirements. These achievements are resulting from our experienced construction methods and the optimization of cement mixing, corresponding to the soil conditions at project sites.

Actual size Tests

 Vertical load Testing:  over 100 cases

 Actual size strength Testing:  over 5 cases

 Transverse load testing:       over 5 cases                           

 Strength distribution Testing:    over 5 cases 

 Endurance testing:                  over 5 cases                           

 Mixing tests:                            many cases

Vertical load Testing

4. Application of TENOCOLUMN

TENOCOLUMN method has been adopted in many construction projects as reliable building foundation. Nowadays, it is flexibly applied in various sites such as residential buildings, infrastructures ….

We are pleased that our method can help restore and reconstruction works after the earthquake caused unprecedented destruction in East Japan

* Application fields * Propose of Application
– Foundation – high-strength capacity of the foundation soils
– Road Embankment – preventing consolidation settlement
– Railway Embankment – preventing liquefaction 
– River Embankment – Keeping slip circle
– Port Construction – Keeping Soil
– Airport – Damping
– Sea Embankment – Stiffness of foundation
– Irrigation – Increasing intensity
– Retaining wall – Preventing movement of foundation  


Address: Phòng 403, số 14 Pháo Đài Láng, Đống Đa, Hà Nội