tnf english
Post on 03-Jun-2018
247 Views
Preview:
TRANSCRIPT
-
8/12/2019 Tnf English
1/4
2012.09
-
8/12/2019 Tnf English
2/4
Environmental Friendly
Safety
pile pile
foundationbeam
alluvial layer
diluvium layer
bearing stratum
Not require things like the underground beams for TNF.
The foundation and concrete slab materials are directly placed on the lattice-typed improved
ground layer. As the improved ground layer, the foundation and the slab are constructed in
one body, it can transfer the load of a structure to the ground effectively. In case of building
on soft ground, so far the bearing pile foundation system has been mainly adopted in which
the piles are penetrated down to the firm bearing stratum through the week layer. However,
TNF can realize the low-cost foundation without piles by using the ground surface layer as the
bearing stratum.
The structure of the foundation and the structure of the raft foundation with shallow soil improvementof the building consisting of the improved groundmass and the raft foundation
What kind of foundation is TNF
What kind of foundation is TNF? In short, it is the combination system of the
raft foundation and the ground improvement (shallow soil improvement).The load through the columns (the load of the floors and walls of the second
and higher stories) can be transferred to the bearing ground not only through
the foundation under the columns but also through the slab around the
foundation, by the unifying effect with improved ground, foundation and slab.
In addition, it prevents ground moving laterally at the bottom of the improved
ground layer by the latticetyped because the ground is confined improved
ground layer. The structure becomes stable by this supporting mechanism.
(This is called the confining effect of TNF.) This is one of the good point of
TNF.
foundation(improved ground)
Low-cost
1Little settlementThere is no extra increase in load because the design load at the foundation is almost equal
to that of the ground.
2Control of the differential settlement
As this foundation is lattice-type, underground stresses become uniformly.
The curb type shallow stabilized ground disperses the underground load. and distribution of the
settlement become uniformly by the effect of rigidity of the improved ground.
3No difference in level caused by the arising of piles in case of the structure
with the bearing pile foundation system.
The TNF raft foundation is constructed in one body with the ground, so there is no arising of
piles by the ground settlement. Therefore , there are to equipped pipes under the ground or
the slab.4Prevention of the liquefaction when earthquakes occur
The effect of confining the ground prevents the liquefaction effectively because it controls the
liquidity of soil when earthquakes occur.
1No damage to the underground environment
It is possible to construct without any damage to the
underground natural environment such as underground
water veins.
2No influence on buried property
It is possible to build on ruins without destroying them. It is also
possible to construct on the disposal station of industrial wastes.
Reduction of CO2
It is possible to reduce a large amount of CO2 by using
fewer building materials and shortening the construc-
tion terms, so that the operating time of heavy construc-
tion machine can be decreased.
1Combine of the foundation slab and the improved ground layer
Crushed stone, concrete, reinforcing bars, and molds can be reduced considerably, and low-cost
can be realized by the combine of foundation slab and improved ground layer.
2Improvement of the on-site ground
Since only the shallow ground soil is improved, the amount of soil carried out and in are
decreased considerably because it is not necessary to dispose of excavated soil.
3Reduction of the cost for removal
In case of the structure with pile foundation on a fixed leased land, the cost of removing and
disposing of the piles arises when the land is returned. In TNF system, the cost of destruction
becomes low largely becouse the improved layer can be used effectively as the soil generated
under construction, or put aside.
4Shortening of construction terms
Since the foundation and the slab concrete is directly placed on the improved ground layer,
construction terms can be reduced considerably.
Excavation
Secondimprovement
Nonimprovement
Firstimprovement
-
8/12/2019 Tnf English
3/4
Reliable AccomplishmentsYears of accomplishiments 1993NowConstruction Accomplishments: more than 250 buildings more than 770,000
the soft ground with asilt layer about 19m deepfrom the ground surface.
The condition of the parts constructed by TNF raft foundation system
The condition of the parts constructed by the bearing pilefoundation system
There appears no difference inlevel by the natural settlementbetween the store constructed byTNF and the ground around it.
The piled foundation has arisen (byapproxomately25cm) relatively tothe ground at the septic tankadjoining the store because the
ground has settled down naturally
TNF
the piled foundation
The past external forces byHyogoken Nanbu Earthquake on January 17.1995
Earthquake intensity 4(middle earthquake)Geiyo Earthquake on March 24 .2001 Earthquake intensity 5(strong earthquake)
21,617000yen
36
pile
Pile VS TNF
reinforcing rod construction
As of Sep 2012
0
50
100
150
200
250
H24H23H22H21H20H19H18H17H16H15H14H13H12H11
the number of buildingsproperties
The total of the constructed properties
after the grant of the patent
suitability judgment execution
The total of the constructed properties
0
100000
200000
300000
400000
500000
600000
700000
800000
H24H2322H21H20H19H18H17H16H15H14H13H12H11
the area of construction( )
The total of the construction area
770,000
suitability judgment execution
-
8/12/2019 Tnf English
4/4
TNF System plus middle layer improvement.TNF System is applicable to middle and high rise buildings.
.
Please refrain from the reproduction and duplication of the contents from this brochure without permission.
TNF is one of our registered trade marks.
top related