Pore Pressure Transducer
Embedded in a boring or together with a pile or steel sheet pile. These transducers measure pore water pressure
●Small-sized design, 30 mm in outer diameter, enables installation in borings of small diameters.
●Flat filters FB-10SUS (10 μm mesh standard) are provided to prevent the sensing part from clogging.
●Stainless steel case (Including a FB-10SUS)
Embedded in a boring or together with a pile or steel sheet pile, BPB-A/BPB-A-T series transducers measure pore water pressures or pore pressures. If desired, they can be used as pressure-based underground water level transducers by installing in a well. The BPB-A-T series is provided with temperature measuring function for simultaneous measurement of pore pressure and temperature. The cable length may be changed as specified.
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A temperature measuring function enable them to measure stress and temperature simultaneously.
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●For Large Displacement Measurement
●500 to 5000 mm
Large Displacement Measurement and High-Level Output in Each Capacity
DTP-D-S displacement transducers are designed to measure displacement by converting expansion/ contraction of a sensing wire to electric signal by potentiometer. Four models are available with rated capacity 500, 1000, 2000 and 5000 mm, all providing a high rated output of 5 mV/V. In addition, measuring force of the wire is constant, thereby making these transducers easy to use.
●Compact, lightweight, and easy to install
●Measurement possible with strain amplifier
●Constant measuring force of the wire
(with differences between pull-out and pull-in)
●Stainless steel wire is used (SUS 304).
※For cases where the transducer mainframe cannot be mounted to a steady point by attaching the tube to the wire outlet, KYOWA can offer a type which enables displacement measurement by fixing the tip of the tube to a steady point. (Free Free Steady Point Type steady point type
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.
§ It is made of specific chemical fiber and able to prevent corrosion
§ Raschel netting structure and hard to get broken and loose.
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
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.
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.
Zero hazard materials.
None of HBCD, CFC
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.
Lab tests (full scale vibration)
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
• 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
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
Suitable for compressive changes of rock-bed and enables measurement of upheaval.
The BRD-AT series rock-bed compression displacement transducers are designed to measure compressive changes of rock-bed. They detect relative displacement between the ground surface and the anchor fixed to the bottom of a boring. A temperature measuring function enables simultaneous measurement of displacement and temperature. Zero balance adjustment at the time of installation enables measurement of upheaval, and thus they can be used for rock-bed grout management.