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Tokyo IWM August 2004. Contribution to Session on : case histories, and strategies for database construction. François SCHLOSSER & Roger FRANK CERMES (ENPC-LCPC). Example of the Saint Maurice noise barrier (see 2 nd Lizzi Lecture by F. Schlosser) - PowerPoint PPT Presentation
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François SCHLOSSER & Roger FRANK François SCHLOSSER & Roger FRANK
CERMES (ENPC-LCPC)CERMES (ENPC-LCPC)
Tokyo IWM August 2004
Contribution to Session on : Contribution to Session on : - case histories, and case histories, and
- strategies for database construction strategies for database construction
1)1) Example of the Saint Maurice noise barrier Example of the Saint Maurice noise barrier (see 2(see 2ndnd Lizzi Lecture by F. Schlosser) Lizzi Lecture by F. Schlosser)
2) An example of database strategy (LCPC 2) An example of database strategy (LCPC design method for micropiles)design method for micropiles)
Preliminary questions : Preliminary questions :
- What is a micropile ?What is a micropile ?
- When can we expect ‘full interlocking’ effects? When can we expect ‘full interlocking’ effects?
FrenchFrench Micropile ClassificationMicropile Classification
1)1) Example of the Saint Maurice noiseExample of the Saint Maurice noisebarrierbarrier
ST MAURICE NOISE BARRIER WALL
1,75 m
,50 m
,25 m
,40
m
,40
m
3,50
m
2,84 m 4,00 m
4,00
m
34,21 NGF
35,10 NGF
20 °
13,5 °
0,65 m0,60 m
LATERAL LOADING TEST
0
50
100
150
200
250
300
350
400
450
0 5 10 15 20 25
déplacement de la tê te (mm)
micropieu vertical
micropieu inc liné
Vertical
Inclined( traction)
MICROPILE LOAD – DISPLACEMENT CURVES
Displacement at the top (mm)
Axi
al f
orce
at
the
top(
kN
)
-0,0005
0
0,0005
0,001
0,0015
0,002
0,0025
0,003
0 30 60 90 120 150
micronivelle (avant)
micronivelle (arrière)
inclinomètre (micropieu vertical)
inclinomètre (micropieu incliné)
comparateurs (face avant)
0
0,01
0,02
0,03
0,04
0,05
0 30 60 90 120 150ro
tati
on
(ra
d)
micronivelle (avant)
micronivelle (arrière)
inclinomètre (micropieu vertical)
inclinomètre (micropieu incliné)
comparateurs (face avant)
ROTATION ( R ) VERSUS APPLIED LOAD ( F )
F (kN)
R(rad)
R : rotation of the footing
F : (lateral) load applied to the wall
Applied load ( kN)
Measurement
Goupeg 1
Goupeg 2
Rotation (rad)
COMPARISON BETWEEN MEASUREMENTS AND GOUPEG CALCULATIONS
-2
0
2
4
6
8
10
12
14
16
0 100 200 300 400
effort (kN) pr
ofon
deur
sous
la se
mel
le (m
)
AXIAL LOAD ON VERTICAL PILEForce (kN)
Depth
z (m)
( compression )
-2
0
2
4
6
8
10
12
14
16
0 100 200 300 400
AXIAL LOAD ON INCLINED MICROPILE
Depth
z (m)
Force (kN) ( traction )
2) An example of database strategy2) An example of database strategy
Design of high pressure injected anchorages and micropiles Design of high pressure injected anchorages and micropiles LCPC method (Bustamante and Doix, 1985)LCPC method (Bustamante and Doix, 1985)
Conclusion (main) :Conclusion (main) :
- one should know right from the beginning what - one should know right from the beginning what is the aim of the study/test is the aim of the study/test