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.
renders a high stability and minimizes deformation. It is applied to retaining
wall systems up to considerable height. This Manual is intended for design and
construction of GRS-RW system up to a maximum height of 10 m. Beyond this
height, the design specialists should be consulted. For applications other than
highways, related specifications and guidelines should also be consulted.
1. Features of 3R retaining wall systems and scope of
a. Features of 3R retaining wall systems
Grid is a fiber net of highly strong vinyl fibers that have been immersed in
Grid is reinforcing materials for RRR-method. 3R retaining wall has advantages
Exhibit high strength, offering soil
confinement and reinforced fill.
Perform high weathering, chemical, and
thermal (cold and heat) resistance.
Perform high impact resistance.
Perform high creep properties
Easy to construct and quality control. Be able
to construct in smaller area in compare which tradition earth retaining wall.
The amount of soil is significant lower in
comparison with tradition earth retaining wall.
Retain the strength against the impact
road of seism load and the repeated load of running train.
a. Scope of Application
3R is applied in the following cases:
Expansion of existing roads, constructions
Using for positive and negative slope
Tunnel face strengthening
Bridge pier and foundation strengthening
renders a high stability and minimizes deformation. It is applicable to
retaining wall systems up to considerable height. This Manual is intended for
design and construction of GRS-RW system up to a maximum height of 10 m. Beyond
this height, the design specialists should be consulted. For applications other
than highways, related specifications and guidelines should also be consulted.
list of relevant Japanese specifications and guidelines related to designing,
constructing and inspecting are given below:
Highway Bridge Specification, Vol. 4 –
Substructures, Japan Highway Public Corporation.
Specifications of Highway Earthwork, Retaining
Walls, Culverts and Temporary Structures, Japan Highway Public Corporation
Specifications of Structural Design of Building
Foundation, Japan Architectural Society.
Design and Construction Manual of
Geotextile-Reinforced Soil Structures, Public Works Research Institute,
Ministry of Construction
Design Standards for Soil Railway Structures,
Design Standards for Concrete Railway
Structures, publisher Maruzen
Design Standards for Railway Structures –
Foundation Structures and Retaining Structures, Japan Society of Civil
Design Standard for Railway Structures –
Reinforced Concrete and Unreinforced Concrete Structures, Japan Society of
Design and Construction Manual for Mixing
Foundation, Japan Railway Technical Research Institute.
Design and Construction Guidelines for
Reinforced Soil Structures, Japan Railway Technical Research, Japan Railway
Technical Research Institute.
Large Displacement Measurement and High-Level
Output in Each Capacity
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.
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
VIET – JAPAN ADVANCED TECHNOLOGY JOINT STOCK COMPANY
Business code: 0104485327 Headquarters: Room 106, N1 Building, University of Transport, Dong Da, Hanoi Representative office: Room 403, No. 14, Phao Dai Lang, Dong Da, Hanoi