Company(ผูบ้รรยาย):

Power blender method association

Technical Name(หวัขอ้เทคโนโลย)ี:

Power Blender Method

วธิพีาวเวอรเ์บลนเดอร ์

Presenter:

大河内 保彦

Yasuhiko Okochi

森 裕之

Hiroyuki Mori

31

32

Pow

er B

lend

er M

etho

d

Pow

er B

lend

er ®A

ssoc

iatio

n

1

Bre

akth

roug

h te

chno

logy

ofG

roun

d Im

prov

emen

t

Con

tent

s1.

Intr

oduc

tion

–C

ount

erm

easu

res

for

Sof

t Gro

und

2.S

oil S

tabi

lizat i

on b

y M

echa

nica

l Mix

ing

3.P

ower

Ble

nder

Met

hod

4.G

ener

al p

roce

dure

of

Pow

er B

lend

er M

etho

d5.

App

licat

ion

of P

B M

etho

d (M

echa

nica

l mix

ing)

6.A

dditi

onal

info

rmat

ion

–rat

iona

l des

ign

7.C

oncl

usio

n

2

1. In

trod

uctio

n –

Cou

nter

mea

sure

s fo

r S

oft G

roun

d

3

Met

hod

Cov

erag

eCon

stru

ctio

n pe

riod

Cos

tR

emar

k

Slo

w B

anki

ng▲

×◎

larg

e de

form

atio

nS

urch

arge

▲×

△～

○di

tto.

Cou

nter

wei

ght F

ill△

▲○

ditto

.G

eote

xtile

○▲

○di

tto.

Vert

ical

Dra

in△

△△

～○

ditto

.

Rep

lace

men

t◎

△×

～▲

Nee

d go

od m

ater

ial,

site

for

was

te s

oil

Woo

den

pile

△～

○○

▲～

△Im

prov

e on

ly

limite

d de

pth

San

d/G

rave

l pile

△～

○○

×～

△de

form

atio

n

Cem

ent M

ixin

g◎ ◎ ◎◎

◎ ◎◎◎× ×××

～○

～○

～○

～○

(CG

I)sm

all

defo

rmat

ion

Ligh

twei

ght B

anki

ng○

～◎

◎×

ditto

.

◎:E

xcel

len

t○

：G

oo

d△

：A

vera

ge

▲:F

air

×：P

oo

r

Pow

er B

lend

er M

etho

d :

one

of ex

ecut

ion

met

hods

of m

echa

nica

l mix

ing

CG

I Met

hod

: a

new

des

ign

met

hod

for

solid

ifica

tion

type

gro

und

impr

ovem

ent

2. S

oil S

tabi

lizat

ion

by M

echa

nica

l Mix

ing

-1 4

Refe

rence:

Th

e D

ee

p M

ixin

g M

eth

od

By K

ita

zum

e＆

Tera

shi

Mec

hani

cal m

ixin

g is

mor

e re

ason

able

than

inje

ctio

n.P

hysi

cal p

rope

rtie

s of

sta

biliz

ed b

ody

(sol

idifi

ed s

oil)

are

sim

ilar

to s

oft r

ock.

-co

mpl

etel

y di

ffere

nt fr

om ‘s

truc

ture

’.

33

2. S

oil S

tabi

lizat

ion

by M

echa

nica

l Mix

ing -2

Re

fere

nce

: p

am

ph

let

of

CD

M M

eth

od

by C

DM

Ass

oci

ati

on

Str

engt

h di

ffere

nce

depe

nds

on S

oil T

ype

※ ※※※O

rgan

ic s

oil o

ften

need

s a

lot o

f cem

ent

Refe

rence:

Th

e D

ee

p M

ixin

g M

eth

od

By K

ita

zum

e＆

Te

rash

i

5

3. P

ower

Ble

nder

Met

hod

-1

6

Pow

er B

lend

er:

›Ver

tical

mix

ing

by u

sing

‘tr

ench

er’

› B

ase

mac

hine

–m

odifi

ed

back

hoe

› H

ighe

r ex

ecut

ion

spee

d(a

roun

d 50

m3/h

r)=

> L

ow c

ost

( 1/2

of D

MM

in J

apan

)

Ord

inar

y D

MM

:›

Hor

izon

tal m

ixin

g by

usi

ng

mix

ing

blad

es›

Bas

e m

achi

ne –

spec

ializ

ed

mac

hine

for

the

met

hod

Hig

h m

obili

ty a

nd a

pplic

abili

ty fo

r in

conv

enie

nt s

ite

Vert

ical

mix

ing

(Pow

er B

lend

er)

Max

imum

dep

th ≈1

3mE

xecu

tabl

e at

mo

dera

te s

lope

etc

.

Hor

izon

tal m

ixin

g (D

MM

)M

axim

um d

epth

aro

und

30m

Hor

izon

tal w

orki

ng s

ite o

nly

No

te :

smal

ler

bas

e m

ach

ine

also

a v

aila

ble

(max

dep

th a

rou

nd

10

m)

Hug

e ba

se m

achi

ne

Bac

khoe

Atta

chm

ent f

or T

renc

her

7

3. P

ower

Ble

nder

Met

hod

-2

Uni

form

str

engt

h ca

n be

exp

ecte

d ev

en fo

r m

ultip

le la

yers

Imag

e of

res

ultin

g st

reng

th

Depth (m)

q u(k

N/㎡

)q u

(kN

/㎡)

Depth (m)

Vert

ical

mix

ing

(Pow

er B

lend

er)

Hor

izon

tal m

ixin

g(D

MM

)

8

3. P

ower

Ble

nder

Met

hod

-3

34

Sui

tabl

e fo

r cr

eatin

g ‘W

all s

hape

d’ s

tabi

lized

bod

y

Vert

ical

mix

ing

(Pow

er B

lend

er)

Hor

izon

tal m

ixin

g (D

MM

)

9

3. P

ower

Ble

nder

Met

hod

-4

Des

ign

So

il In

vest

igat

ion,

S

amp

ling

Des

ign

str

eng

th

of i

mp

rove

d s

oil

Lab

ora

tory

test

sB

asic

pro

per

ties

of s

oil

Mix

ing

test

Det

erm

ine

kin

d a

nd

vo

lum

e o

f st

abili

zatio

n ag

ent (

cem

ent)

Co

nsi

der

incr

ease

rat

io

bet

wee

n fi

eld

str

eng

th

and

des

ign

du

e to

u

nce

rtai

nty

of a

ctu

al s

ite

Exe

cutio

n Sam

plin

g o

f st

abili

zed

bo

dy

and

cu

ring

Lab

ora

tory

test

Ch

eck

stre

ng

th

YesSTA

RT

OK

?

Wo

rk p

rog

ress

co

ntr

ol

No

EN

D

Pla

nn

ing

wo

rkin

g p

roce

du

re,

imp

rovi

ng

volu

me

per

ho

ur,

an

d s

o o

n

Rec

on

side

r o

rigin

al

des

ign

to s

atis

fy r

equ

ired

p

erfo

rman

ce

10

4. G

ener

al P

roce

dure

of P

B M

etho

d -

1

Pro

pe

rty

for

de

sig

nIn

pu

tp

ara

me

ters

for

de

sig

nLa

bo

rato

ry

test

De

nsi

tyρ

(g/c

m3)、

γt(k

N/m

3),

○

Wa

ter

con

ten

tw

(%)

○

Pa

rtic

lesi

zed

istr

ibu

tio

nU

c(%

):

Un

ifo

rmit

yco

eff

icie

nt,

U’c

(%)

:C

oe

ffic

ien

to

fcu

rva

ture

○

Liq

uid

Lim

it a

nd

Pla

stic

L im

it

I p(%

):

Liq

uid

ity

ind

ex,

I c(%

):

Co

nsi

ste

ncy

ind

ex

I L(%

):

Liq

uid

lim

it

○

Soi

l Inv

estig

atio

n, S

ampl

ing,

Lab

orat

ory

Test

s

Pro

pe

rty

for

de

sig

nIn

pu

tp

ara

me

ters

for

de

sig

nLa

bo

rato

ryte

st

Co

mp

ress

ive

stre

ng

thqu

(kN

/m2)

Un

iaxi

al

com

pre

ssio

n t

est

In o

rder

to d

eter

min

e th

e ki

nd o

f st

abili

zatio

n ag

ent (

cem

ent)

and

am

ount

for

uni

t vol

ume,

test

s w

ith s

ever

al k

inds

of a

gent

s an

d am

ount

s sh

all b

e ca

rrie

d ou

t.

11

4. G

ener

al P

roce

dure

of P

B M

etho

d -

2E

xecu

tion

Sco

peD

ep

th:<

aro

un

d 1

3m

12

4.G

ener

al P

roce

dure

of P

B M

etho

d -

3

35

Exe

cutio

n

13

4. G

ener

al P

roce

dure

of P

B M

etho

d -

4E

xecu

tion

Con

stru

ctio

n m

anag

e men

t eq

uipm

ent

Who

le im

prov

emen

tB

lock

Sha

peR

ecta

ngul

ar c

olum

n

Gen

eral

impr

ovin

g sp

eed

50m

3 /hr

14

4. G

ener

al P

roce

dure

of P

B M

etho

d -

5

Exe

cutio

n

Con

stru

ctio

n m

anag

e men

t eq

uipm

ent

Wal

l typ

e

Gen

eral

impr

ovin

g sp

eed

50m

3 /hr

15

4. G

ener

alP

roce

dure

of P

B M

etho

d -

6Q

ualit

y co

ntro

l and

Per

form

ance

Ver

ifica

tion

Wal

l typ

e

Imp

rovi

ng

Are

a Ch

arac

teris

tics

of s

amp

les

stre

ng

thst

ren

gth

stre

ng

thM

ean

str

eng

th >

des

ign

stre

ng

th is

no

t su

ffici

ent

Sta

tistic

al p

roce

ss to

ev

alu

ate

the

wh

ole

ch

arac

teris

tics

with

sp

ecifi

ed r

elia

bili

ty

stre

ng

th

Rep

rese

nta

tive

Ch

arac

teris

tics

of

wh

ole

sta

bili

zed

bo

dy

Mea

n s

tren

gth

>

des

ign

stre

ng

th

shal

l be

exam

ined

Sam

ple

16

4. G

ener

al P

roce

dure

of P

B M

etho

d -

7

36

Sta

bilit

y, c

ontr

ol d

efor

mat

ion,

ant

i-liq

uefa

ctio

n,

etc…

..

17

5. A

pplic

atio

n of

PB

Met

hod

(mec

hani

cal m

ixin

g)

Stif

f Lay

er

18

Flo

atin

g ty

pe s

tabi

lized

bod

y is

mor

e ra

tiona

l and

effe

ctiv

e if

the

shap

e an

d ar

rang

emen

t are

des

igne

d w

ith c

onsi

derin

g co

nfin

ing

effe

ct.

DM

M

DM

M

Con

vent

iona

l des

ign

: Bot

tom

of s

tabi

lized

bo

dies

mus

t be

supp

orte

d by

stif

f lay

er.

Stif

f Lay

er

ap=50~1

00% a

p=10~3

0%

Str

ess

dis

trib

ution

+ Hig

her

effective

st

ress

Hor

izon

tal d

ispl

acem

ent o

f the

em

bank

men

t its

elf i

n C

GI i

s ve

ry s

mal

l.T

here

fore

, it i

s im

port

ant t

o ev

alua

te

vert

ical

def

orm

atio

n (s

ettle

men

t) o

f un

impr

oved

laye

r.

log

p’

e

Sam

e s

tress

incre

ment

Δp’

S2<<S1

s 1 s2

In g

ener

al, b

ecau

se o

f hig

her

st

ress

leve

l + s

tres

s d

istr

ibu

tion

and

usu

ally

d

eep

er p

art i

s st

ron

ger

an

d

stiff

er, t

ota

l set

tlem

ent o

f flo

atin

g ty

pe

is in

sig

nifi

cant

.

6. A

dditi

onal

info

rmat

ion

–ra

tiona

l des

ign

DM

M

DM

M

DM

M

DM

M

Pow

er B

lend

er M

etho

d ha

s m

any

adva

ntag

es1)

Hig

h qu

ality

& L

ow c

ost

2) S

hort

en c

onst

ruct

ion

perio

d3)

Exc

elle

nt m

obili

ty o

f the

mac

hine

4) H

igh

relia

bilit

y5)

Wid

ely

appl

icab

lefo

r m

any

type

sof

soi

l 6)

Var

ious

app

licat

ion

such

as

Sta

bilit

y of

em

bank

ing,

incr

ease

bea

ring

capa

city

,re

duce

Set

tlem

ent,

defo

rmat

ion

cont

rol,

redu

ce e

arth

pr

essu

re, a

nti-l

ique

fact

ion

etc.

7) L

ow n

oise

and

low

vib

ratio

n8)

Sm

all d

efor

mat

ion

of a

djac

ent g

roun

d du

ring

exec

utio

n

19

7. C

oncl

usio

n

Env

ironm

enta

lfr

iend

ly

Gen

eral

impr

ovin

g sp

eed ≈ 5

0 m

3 /hr

Max

imum

impr

ovin

g de

pth ≈

13m

20

Tha

nk y

ou v

ery

muc

h !

37

38

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