key words : plastic board drain, oil pressure …key words : plastic board drain, oil pressure...

1 2 3 4 5 6

1 179-8914 1-39-16E-mail: [email protected]






PBD PBD

PBDPBD

FEM

Key Words : plastic board drain, oil pressure resistance, cone penetration test

1.

1

PBD PBD

PBD

PBD

PBD

2.

(1)PBD

PBD

2), 3)

SCK FFF (1)

KF CF

SF

(2)

CF

Cq̂ KA

CKC qAF ˆ (2)

PBD

Cq̂

PBD

(3) PBD (4) PBD

PBD PBD

(1) PBD

(2)

PBD 1)

SCK FFF

CF

SF

KF

Cq

0.010.02m/s PBD

0.3 0.5m/s

4), 5)

CC qq̂ (3)

(3) (2)

CF

Cq

CKC qAF (4)

(3)

SF

5 6m

7)

1PBD

20

SF

Sf̂

dzDfFz

KSS0

ˆ (5)

KD z

Sf̂

Sf

PBD

SS ff̂ (6)

(6) (5)

SF

dzfDFz

SKS0

(7)

Sf

Cq

Begemann8)Sf Cq

Schmertmann9)

FR )( CS qfRobertson10)

PBD

FR SfPBD

BegemannSchmertmann

FR 0.03 0.07

FR 0.05

6

35.7 mm

153 mm153 mm

PBD

47 mm

A 0.001 m2

D 0.112 m

AK 0.0217 m2

DK 0.535 m

PBD

(a) (b)

60°

dzqD

dzqFRDFz

CK

z

CKS

0

0

05.0 (8)

Cq

Cq

zqzz

dzqdzq C

z

Cz

C0

0(9)

(8) SF

Cq

KSCS AqF 05.0 (10)

KSA zDK

(4)(1)(4) (10)

KSCCKK AqqAF 05.0 (11)

Cq

KFMeyerhoff11)

FR =0.005

SCC AqqAQ 005.0 (12)

Q A SA(11) (12)

(11)Meyerhoff

3.

(1)PBD

MP PBD,

KF (11)

MP

KF

KF

MFW

WFF MK (13)

(11)(13)

KF

MFPBD

MP

MM PF (14)

KF MP(13) (14)

WPF MK (15)

WFF MK

MPMF

(2)

MP KF(15)

PBD

MP

KF

PBD

PDC-200 PDC-3002 PBD

PDC-200

MP

KF W

MF WFK

MP MF

(15)=0.0032

PDC-300PBD

MP

MF(15)

=0.0050PBD

PBD

KF

MP

WFM

W MND-01 202 PDC-200 0.0157D-02 302 0.0098D-03 314 0.0098D-04 302 0.0176D-05 312 0.0176D-06 310 0.0078

PDC-300

PBD

W

MP (15) KF

4.

(1)

Cq

MP (11)

PBD(11) 2

|KF (1)

SCK FFF | (16)

KF CF

SK FF | (17)

(16) (17)

CKK FFF || (18)

CF SF

212

PBD PDC-200W 0.0157MN

Cq

G.L.-4m

MP (11)

G.L.-5m

SCK FFF

CF

SF

WFF MK

MF

W

SK FFSF

WFF MK

MF

W

T1-A-01 1.0 0.8 T2-A-01 1.0 1.0T1-A-02 1.0 0.8 T2-A-02 1.0 1.0T1-A-03 1.0 0.8 T2-A-03 1.0 1.0T1-B-01 0.5 0.5 T2-B-01 0.9 0.9T1-B-02 0.5 0.5 T2-B-02 0.9 0.9T1-B-03 0.5 0.5 T2-B-03 0.9 0.9T1-C-01 0.3 0.4 T2-C-01 0.6 0.6T1-C-02 0.3 0.4 T2-C-02 0.6 0.6T1-C-03 0.3 0.4 T2-C-03 0.6 0.6T1-D-01 0.2 0.3 T2-D-01 0.8 0.8T1-D-02 0.2 0.3 T2-D-02 0.8 0.8T1-D-03 0.2 0.3 T2-D-03 0.8 0.8

V m/sNo. No.

CPT-01 CPT-02

No. No.V m/s

MP 1.0 1.5MPaG.L.-5m

(2)|KF

|MP (15)

WPF MK || (19)

|KFW

|MP

WPF MK || (20)

(19) (20) (18)

WPPF MMC 2|| (21)

CF MP

CF Cq(4)

CKC qAF (4) :

(4) (21)

MP

CF Cq

KC Aq

1.0

0.21.0m/s

PBD

(3)

SF (17)(20) MP

WPF MS | (22)

SF

(a) CPT-01 (b) CPT-02

Cq (10)

KSCS AqF 05.0 (10) :

(10) (22)

MP

SF

Cq

KSC Aq05.0

0.06

(4)(11)

MP

Cq=1.0 =0.06

(11)

5.

PBD(11)

7 PBDPBD

1.0 0.010.1

(8)FR 0.05

W MN-01 PCD-300 0.0050 0.0168 0.06-02 PDF-300 0.0050 0.0141 0.03-03 PDF-300 0.0050 0.0063 0.06-04 PDF-200 0.0032 0.0075 0.03-05 PDF-200 0.0032 0.0088 0.07-06 PDC-300 0.0050 0.0098 0.06-07 PCD-300 0.0050 0.0098 0.05

PBD

1.0

(a) -01 CPT-01 (b) -01 CPT-02

(c) -01 CPT-03 (d) -02 CPT-01

(e) -02 CPT-02 (f) -03 CPT-01

(g) -04 CPT-01 (h) -05 CPT-01

(i) -05 CPT-02 (j) -06 CPT-01

(k) -07 CPT-01 (l) -07 CPT-02

0.03 0.050.05

0.07

PBDPBD

6.

PBD 0.6 1.5mPBD

PBD25m

1.2m 1.2m

PBD 2

PBD

7000

PBD

12

PBD

PBD

PBD

Cq =1.5MPa2

A-A’

A-A’10m

5 15m

PBD

PBD

PBD

FEM13), 14) PBD

PBDPBD

PBD

0.5

3.54.5

2.51.5

(MPa)

A

A’

B’

C’

C

B

3

PBD

1

7.

PBD

PBD

PBD

FEMPBD

A-A’ SECTION

: Sand : Clay

0 50 100 150(m)

0

10

(m)

20

30

B-B’ SECTION

0

10

(m)

20

30

0 50 (m)

C-C’ SECTION

0

10

(m)

20

30

0 50 (m)

: Sand : Clay

: Sand: Clay

A-A’ SECTION

0.5

3.5 4.5

2.5 1.5

(MPa)

0 50 100 150 (m)

0

10

(m)

20

30

B-B’ SECTION

0.5

3.5 4.5

2.5 1.5

(MPa)

0

10

(m)

20

30

0 50 (m)

C-C’ SECTION

0.5

3.54.5

2.51.5

(MPa)

0

10

(m)

20

30

0 50 (m)

2

1) : , ,

pp.99-130, 2009. 2) , , , : PBD

,64 , III-181, pp.361-362, 2009.

3) , , , , , :

, 65, III -393, pp.785-786, 2010.

4) : , ,

No.757( 333 ), 1971. 5) Muromachi, T. : Cone penetration testing in Japan, Proc.

of Cone Penetration testing and experience, ASCE National Conv., St. Louis, pp.49-75, 1981.

6) : ,pp.233-235, 1995.

7) , : ,, pp.183-210, 1976.

8) Begemann, H.K.S.Ph. : The Friction Jacet Cone as an Aid in Determining the Soil Profile, Proc. of the 6th ICSMFE,Vol.I, pp.17-20, 1965.

9) Schmertmann, J.H. : Dutch friction-cone penetrometer exploration of research area atfield 5, Eglin Air Force Base, Florida, U.S. Army Eng. Waterways Exp. Stat.,Vicksburg, Miss., Contact Rep., S-69-4, 1969.

10) Robertson, P.K. : Soil classification using the cone penetration test, Canadian Geotechnical Journal, Vol.27, No.1, pp.151-158, 1990.

11) Meyerhof, G.G. : Penetration Test and Bearing Capacity of Cohesionless Soils, Proc. of the ASCE, Journal of the Soil Mech. and Found. Div., Vol.82, No. SM1, p.866, 1956.

12) NCB : , p.61, 2001. 13) , , , , ,

: FEM, 65 , III

-389, pp.777-778 2010.14) , , , , ,

: FEM 1, 65

, III -234, pp.467-468, 2010.

DEVELOPMENT OF GEOLOGICAL DISTRIBUTION PRESUMPTION METHOD USING OIL PRESSURE RESISTANCE OF THE PLASTIC BOARD DRAIN

MACHINE

Masafumi HIRATA, Shinichiro SHIRAGA, Hideki SHIMIZU, Jun FUKUDA, Shuu KAWANABE and Tadaaki NOMURA

Plastic board drain (PBD) method is a consolidation method which can accelerate consolidation by placing a lot of PBD into the soft ground. It is important for PBD method to get information about the layer thickness of soft ground and geological distribution, before designing the optimal arrangement of PBD. However, it is difficult to get the accurate information by soil exploration with an only few samples.

In this paper, the simplified estimating equation is proposed that evaluates cone bearing capacity by using oil pressure resistance of placing PBD machine during operating. Furthermore, the system is proposed that can evaluate the distribution in three dimensions of ground strength by using estimated cone bearing capacity. Finally, it was confirmed that this proposed system could evaluate the layer thickness of soft ground and geological distribution accurately.

key words : plastic board drain, oil pressure …key words : plastic board drain, oil pressure...

Documents