- TD. THURBER ENGINEERING L ALBERT A TRANSPORTATION PEACE REGION - - PDF document

SLIDE 1

• THURBER ENGINEERING

L

TD.

ALBERT A TRANSPORTATION PEACE REGION (PEACE RIVER I HIGH LEVEL) INSTRUMENTATION MONITORING RESULTS

FALL 2012 SECTION C SITE PH10: HWY 726:02, EUREKA RIVER

1. OBSERVATIONS 1.1 Field Program and Instrumentation Status One slope inclinometer (SI08-4) and one pneumatic piezometer (PN08-4) were read at the Hwy 726:02 Eureka River site on October 2, 2012 by Mr. Chad Gray, C.E.T. and

• Ms. Jessica Pryer, T.T., of Thurber Engineering Ltd. (Thurber).

The Sl was read using a RST Digitallndinometer probe with

2 f t

wheelbase and a RST Pocket P C

• readout. lndinometer reading depths were defined as per cable markings with respect to the

top of the inclinometer casing. The pneumatic piezometer was read using a RST C108 pneumatic piezometer reader. 2. INTERPRETATION 2 . 1 General Sl plots for A and B directions are presented in Section D and are summarized below. Wlere movement has been recorded the r e s u ltant plot (X direction) and rate of movement have also been provided.

2 ,

9636- 51

A v e n u e , E d m

• n

t

• n

, A B T 6 E 6 A 5 T : 7 8 4 3 8 1 4 6 F : 7 8 4 3 7 7 1 2 5

thurber

. c a

SLIDE 2

• T

H U R B E R

2.2 Zones of Movement Zones of new movement were not observed in SIOS-4 since the last set of readings in spring 2012. Zones of old movement are summarized in Table PH10-1 at the end of this report. This table also provides a historical account of the total movement, the depth of movement, and the maximum rate of movement that has occurred at this site since the initialization of the slope inclinometers. 2.3 Interpretation of Monitoring Results Since the last set of readings in spring 2012, SIOS-4 has registered an incremental movement

• f

0.6 mm at a depth

• f

7.0 m to 8.8 m, corresponding to a rate of movement of 2.0 mm/yr. PN08-4 showed a decrease in water level of 0.34 m. The results are presented in Table PH10-2.

3 .

RECOMMENDATIONS 3 . 1 F u t u r e Work The area is experiencing continued slide movements, and should be visually monitored by TRANS personnel and the MCI when possible. As the boundaries of the slide extend across the road, any significant slide movement would cause traffic disruption. The instruments should be read again during the spring 2013 program. 3.2 Instrumentation Repairs N

• instruments need repair at this site.

Client: File:

e-file:

Alberta Transportation 15-16-276 \\H\15\16-276 rpt PH1 0 - E d m Date: November 29, 2012 Page 2 of 4

SLIDE 3

• THURBER

Date Monitored· October 2 2012 TOTAL CUMULATIVE RESULTANT INSTRUMENT DATE MOVEMENT A T

#

INITIALIZED NOTED DEPTH SINCE INITIAL READING

(mm)

6 . 4 m m

• v

e r 1 3 . 1 t

• S

/ 9 8

• 1

M a r . 8, 1 9 9 8 14.3 m depth in 40" d i r e c t i

• n

O c t . 1 3 , 2 3 7 8 . 2 m m

• ver

.

3m to

2 . 7 m S / 9 8

• 2

s e t a s t h e d e p t h i n i n i t i a l r e a d i n g 4 2 " d i r e c t i

• n

S / 2

• 1

S e p t . 2 4 , 2 2 N

• t

K n

• w

n S / 2

• 2

S e p t . 2 4 , 2 2 N

• t

K n

• w

n 7.8 mm over 1.8 to 3 . m d e p t h i n 6 " d i r e c t i

• n

S / 2

• 3

S e p t . 2 4 , 2 2 9 6 . 3 m m

• v

e r 7.9 t

• 1

1 . m d e p t h i n 4 5 " d i r e c t i

• n

12.6 m m

• v

e r SI08-4

• Jan. 20, 2008

7 m to 8.8 m depth in 25° direction

TABLE 1- PH10-1 F A L L 2012- EUREKA RIVER (SOUTH OF WORSLEY) INSTRUMENTATION READING SUMMARY

MAXIMUM RATE DATE OF MOVEMENT CURRENT OF

(mmlyr)

STATUS PREVIOUS READING mmlyr between D e s t r

• y

e d O c t . 1 6 , 2 6 M a y a n d O c t . 2 5 1 4 . 8 mmlyrin S l s h e a r e d

• ff

S e p t . 2 1 a t

3m

J a n u a r y 9, 2 1 N

• t

K n

• w

n S/ s h e a r e d S e p t . 27 , 2 3

• ff

a t 15m D u m m y p r

• b

e N

• t

K n

• w

n g

• t

s t u c k at S e p t . 27 , 2 3 t

• p
• f

S/ c a s i n g 16.5mmlyr i n M a y 2 6 S e p t e m b e r 2 4 , D e s t r

• y

e d 2 1 1 3 2 . 4 mm/yr i n S e p t . 2 1 1 7.8 mm/yr Operational June 1 3 , 2012 in Feb. 2008 F 1 g u r e PH10-1 (attached) prov1des a sketch of the approximate locat1ons of the monitonng mstrumentat1on forth1s site.

C l i e n t : F i l e : e

• f

i l e : A l b e r t a T r a n s p

• r

t a t i

• n

1 5

• 1

6

• 2

7 6 \ \ H \ 1 5 \ 1 6

• 2

7 6

rpt PH1

• E

d m

INCREMENTAL CHANGE IN RATE MOVEMENT RATE OF OF MOVEMENT SINCE MOVEMENT SINCE PREVIOUS

(mm/yr)

PREVIOUS READING READING

(mm) (mm/yr)

N I A N I A N / A N I A N I A N I A N I A N I A N I A N I A N I A N I A N I A N / A N I A N I A N I A N I A 0.6 2.0 0.0

D a t e : N

• v

e m b e r 2 9 , 2 1 2 P a g e 3

• f4

SLIDE 4

T H U R B E R

Date Monitored: October 2, 2012 TIP I N S T R U M E N T # DATE DEPTH INITIALIZED

(m)

PN02-1a (27712) NIA 10.0 PN02-1 (27710) NIA 19.0 PN02-2 (27711) NIA 14.5 PNOB-4 N/A 12.4

TABLE 1- PH10-2 FALL 2012- EUREKA RIVER (SOUTH OF WORSLEY) PNEUMA TIC PIEZOMETER INSTRUMENTATION READING SUMMARY

GROUND MAXIMUM MEASURED ELEV. CURRENT PORE PORE

(m)

STATUS PRESSURE PRESSURE (kPA) (kPA) NIA Damaged 6 1 .0 NIA

• n Oct. 9, 2007

NIA Damaged 38.0 NIA

• n May 25, 2006

7.0 NIA Damaged

• n Sept. 27,

NIA

2003 605.0 Operational 20.5 on June 13, 17.2 2012 Figure PH10-1 (attached) provides a sketch of the approximate locations of the monitoring instrumentation for this site. Notes: PN

• pneumatic piezometer.

BGS

• below ground surface.

C l i e n t : F i l e : e

• f

i l e : A l b e r t a T r a n s p

• r

t a t i

• n

1 5

• 1

6

• 2

7 6 \\ H \ 1 5 \ 1 6

• 2

7 6 rpt PH1

• E

d m

CHANGE CURRENT PREVIOUS I N WATER WATER WATER LEVEL LEVEL LEVEL

BGS BGS

SINCE PREVIOUS

(m) (m)

READING

(m)

NI

A NIA NIA N/A NIA NIA NIA NIA N/A 10.65 10.31

• 0.34

D a t e : N

• v

e m b e r 2 9 , 201 2 P a g e 4

• f

4