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| Chemical Grout |
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Chemical grout is used in the ground improvement work
that accompanies the construction of the traffic networks and water
and sewer networks that allow us to lead safe and comfortable lives.
The main applications of chemical grout are ground strengthening and
waterproofing. Urban areas in particular are seeing increasingly large
scale construction projects that go deeper and deeper into the ground,
and the level of technology demanded for ground improvement is growing
higher.
Ryoko Co. has developed a variety of types of chemical grout for civil
engineering construction, including the water glass based N-tight
R Series and Nitorock R Series, as well as the recently introduced
Nanorock and Tai-Q Series R, and these are used regularly by many
customers. Construction methods that apply these products are introduced
below. |
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■ Harmony Grout Method
[Special Water Glass "Nitoks" and special hardening agent] |
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Not only can this method be used for instant-set
injection and compound injection, a near neutral grout can be
obtained and the hardening agent is carbonic acid, lightening
the burden on the groundwater environment and concrete structures.
In recognition of its superior performance, the Harmony Grout
method was awarded the "Technology Examination Certificate
for Construction Mechanization Technology" by the Japan
Construction Mechanization Association, which is sanctioned
by the Minister of Construction. |
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| ■ CCP, CCP-L, CCP-S
Methods (Chemical-Churning-Pile) |
| [Hardening
material, mixing material, additive "NJ Powder"] |
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This method injects a special CCP hardening material
from a rotary nozzle into the ground at high pressure, mixes
the soil particles with the hardening material, and creates
a pile-shaped formation (radius 300 to 1500 mm).
Construction, results, and research have made this method suitable
for use on weak ground areas, and the CCP-L and CCP-S methods
have been developed for sandy soil, ground with a high N value,
and viscous ground. In addition, the CCP-LE and CCP-SE methods
based on water jet cutting are also in use. |
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| ■R.J.P., D-R.J.P, S-R.J.P
Methods (Rodin-Jet-Pile) |
| [Hardening
material, mixing material, and additive "Rodiaid-P" "Rodiaid-D"] |
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This method creates an improved cylindrical structure
with a radius of 2000 to 3500 mm in the ground by rotating and
pulling up a converging-type split two-stage jet system that
injects ultra high-pressure water (aqua jet) and air, as well
as ultra-high pressure hardening material (abrasive jet) and
air from a monitor attached to the tip of a multi-pipe rod assembly. |
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| ■ M.J.S. Method (Metro-Jet-System)
[Mixing material, additive "Metroaid-F"] |
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This method uses the kinetic energy of the ultra-high
pressure jet material to cut natural ground, mix the hardening
material into the soil, and stir to create a consolidated formation.
In particular, the purpose of this method is to allow selection
of an economical hole diameter and the best conditions to suit
the objective, and thereby continually maintain the best injection
conditions in the ground around the monitor. This makes it possible
to create a consolidated formation in any desired direction
at any desired location (radius 2000 to 2600 mm). |
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| R.J.P. Method |
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M.J.S Method |
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