Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
February 2011
STRAND ANCHOR SYSTEMS
for
Permanent and Temporary Rock and Soil Anchors
TUNNELS
RETAINING WALLS
TRANSMISSION LINES
AND ANTENNAS
DAM-TIEDOWNS
EXCAVATION SHORING
Strand Anchor Systems
Applications
BURIED STRUCTURES
St-1
Strand Anchor Systems
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
St-2
Email: [email protected]
Website: www.contechsystems.com
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Contents
Strand Anchor Brochure (contains Technical Data)
St- 4
Technical Data
St 5
Corrosion Protection
St- 6
Sample Anchor Assemblies
St- 9
Anchor Heads
St-17
Stressing
St-18
Accessories
St-21
Post Grouting System
St-27
Geotextile Sock
St-31
Strand Anchor Systems
Table of Contents
St-3
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
STRAND ANCHOR BROCHURE
Strand Anchor Systems
I N D E X
I.
Introduction
Page 2
II.
CTS Strand Anchors
Page 3
III.
Advantages
Pages 4, 5
IV.
Anchor Types & Technical Data
Pages 6,7
V.
CTS Quality Control
Page 8
VI.
CTS Anchor Monitoring
Page 9
VII.
CTS Strand Anchor Installation Sequence
Page 10
VIII. Typical CTS Strand Anchor Applications
IX.
St-4
Seismic Retrofit
Page 11
Page 12
Cross Sec. Area
(APS)
mm 2
inch2
0.217
140
0.43
280
0.65
420
0.87
560
1.09
700
1.30
840
1.52
980
1.74
1120
1.95
1260
2.17
1400
2.39
1540
2.60
1680
2.82
1820
3.04
1960
3.26
2100
3.47
2240
3.69
2380
3.91
2520
4.12
2660
6.51
4200
10.20
6580
13.02
8400
19.96
12880
Ultimate Load
(fpu*APS)
kips
kN
58.6
261
117.2
521
175.8
782
234.4
1043
293.0
1303
351.5
1564
410.1
1824
468.7
2085
527.3
2346
585.9
2606
644.5
2867
703.1
3128
761.7
3388
820.3
3649
878.9
3909
937.4
4170
996.0
4431
1054.6
4691
1113.2
4952
1757.7
7819
2753.7
12250
3515.4
15638
5390.3
23978
Max. Jacking Load
(0.8*fpu*APS)
kips
kN
46.9
209
93.7
417
140.6
626
187.5
834
234.4
1,043
281.2
1,251
328.1
1,460
375.0
1,668
421.8
1,877
468.7
2,085
515.6
2,294
562.5
2,502
609.3
2,711
656.2
2,919
703.1
3,128
750.0
3,336
796.8
3,545
843.7
3,753
890.6
3,962
1406.2
6,255
2203.0
9,800
2812.3
12,510
4312.2
19,182
Corrugated Sheating (o.D.)
PVC
HDPE
in
mm
in
mm
2.20
56
2.4
61
2.20
56
2.4
61
2.20
56
2.4
61
2.50
63
3.6
91
3.15
80
3.6
91
3.15
80
3.6
91
3.15
80
3.6
91
3.94
100
4.7
119
3.94
100
4.7
119
3.94
100
4.7
119
3.94
100
4.7
119
3.94
100
4.7
119
4.49
114
4.7
119
4.49
114
4.7
119
4.92
125
5.7
145
4.92
125
5.7
145
4.92
125
5.7
145
4.92
125
5.7
145
4.92
125
5.7
145
N/A
N/A
6.9
175
N/A
N/A
9.5
241
N/A
N/A
on request
N/A
N/A
on request
Strand Anchor Systems
Our centralizers are made to allow for a minimum of 0.5" (12.7 mm) grout cover or to a specified size. They are available as single wing parts (a minimum of
3 wings is required per location) or as multiple wing elements.
Our strand organizers are fabricated to provide the minimum strand spacing recommended in the PTI manual.
The drill hole size chosen should allow for a minimum gout cover over the corrugated sheath of 0.5" (12.7 mm). If our post-grout pressure lines are used,
allow for a minimum of 1" (25.4 mm) grout cover on the side where the grout pipe is assembled.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
30
47
60
92
No. of
Strands
They are in accordance to:
"Recommendations for Prestressed Rock and Soil Anchors", Post Tensioning Institute (PTI), Phoenix, AZ, 2005 Frourth Edition, PTI 10-2005
"Tiebacks", FHWA-RD-82-047, Federal Highway Administration, Washington DC, 1983
"Ground Anchors and Anchored Systems", Geotechnical Engineering Circular No. 4, Federal Highway Administration, Wahington DC, FHWA-IF-99-015, 1999
CTS Rock and Soil Anchors meet the ASTM A-416 or ASTM A-488 (epoxy coated strand) specifications for 0.6", 7 wire strand
Ultimate stress (fpu)
270 ksi
2
1861.65 N/mm
Weight per strand
0.74 lbs./lf
1.10 kg/m
CTS Strand Anchors, Technical Data
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Technical Data
STRAND, Technical Data
St-5
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Corrosion Protection
Corrosion Protection Classification
In the 2004 Recommendations for Prestressed Rock and Soil Anchors
(Fourth Edition, endorsed by ADSC), the Post-Tensioning Institute,
Phoenix, defines two classes of Corrosion Protection:
Class I,
Encapsulated Tendons
(often referred to as
double corrosion protected, DCP).
Class II,
Grout Protected
Tendons (often referred
to as single corrosion
protected, SCP).
These classes are further outlined
Protection Requirements
Strand Anchor Systems
Class
I
Encapsulate 1. Trumpet
2. Cover, if
d
exposed
Tendon
II
Grout
Protected
Tendon
St-6
Anchorage
1. Trumpet
2. Cover, if
exposed
Unbonded
Length
Tendon Bond
Length
1. Grease-filled
sheath, or
1. Grout filled
2. Grout filled
encapsulasheath, or
tion, or
3. Epoxy for fully
2. Epoxy
bonded
Anchors
1. Grease filled
sheath
2. Heat Shrink
sleeve
Grout
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Corrosion Protection
Corrosion Protection Decision Tree
as recommended by the PTI and endorsed by the ADSC
Anchor Service Live
Temporary (<24 Month)
Agressive
Class II
Protection
Aggressivity
Non-Agressive
None
Not Known or
Aggressive
Non-Agressive
Class I
Protection
Consequences
of Failure
Serious
Not Serious
Class I
Protection
Incremental in
Place Costs
Inexpensive
Class I
Protection
Expensive
Class II
Protection
Strand Anchor Systems
Aggressivity
Permanent (>24 Month)
St-7
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Corrosion Protection
Simple Corrosion Protection
Class II
Cover Cap (if req.)
Corrosion Inhibitor
or Grout (if req.)
Gripper
Final Grout, if required
Bearing Plate
Trumpet (if req.)
Seal (if req.)
Strand
(encapsulated)
Seal
Anchor Grout
Free Stressing Length
Bond Length
Strand Anchor Systems
Anchor Head
Centralizer
Strand Spacer &
Organizer
Strand
(bare)
St-8
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Sample Anchor Assemblies, Bare Strand
Double Corrosion Protection
Class I
Cover Cap (if req.)
Corrosion Inhibitor
or Grout (if req.)
Gripper
Final Grout
Bearing Plate
Trumpet
Seal
Strand
(encapsulated)
Corrugated
Sheathing
(HDPE or PVC)
Overlap
2’ min.
Cement Grout
(field or factory
installed)
Centralizer
Strand Anchor Systems
Seal
Anchor Grout
Strand Bond Length
Free Stressing Length
Anchor Head
Strand Spacer &
Organizer
Strand
(bare)
Grout Cap
St-9
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Sample Anchor Assemblies, Bare Strand
Multiple Corrosion Protection
Class I
Cover Cap (if req.)
Corrosion Inhibitor
Grout (if req.)
Gripper
Final Grout
Bearing Plate
Trumpet
Seal
Strand
(encapsulated)
Corrugated
Sheathing
(HDPE or PVC)
Cement Grout
(field installed)
Anchor Grout
Free Stressing Length
Strand Bond Length
Strand Anchor Systems
Anchor Head
Seal
Centralizer
Strand Spacer &
Organizer
Cement Grout
Plug (2’-0” length)
Strand
(bare)
Grout Cap
St-10
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Sample Anchor Assemblies, Bare Strand
Passive Anchor
Double Corrosion Protection
Class I
Cover Cap (if req.)
Corrosion Inhibitor
or Grout (if. req.)
Gripper
Anchor Head
First Stage Grout
Bond Length
Centralizer
Strand Anchor Systems
Second Stage Grout
Free Stressing Length
Bearing Plate
Strand Spacer &
Organizer
Strand
(epoxy coated)
St-11
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Sample Anchor Assemblies, Epoxy Coated Strand
Active Anchor
Double Corrosion Protection
Class I
Cover Cap
Corrosion Inhibitor or Grout
Gripper
Anchor Head
Bearing Plate
St-12
Second Stage Grout
Free Stressing Length
Seal
Strand
(epoxy coated &
encapsulated)
Seal
First Stage Grout
Centralizer
Bond Length
Strand Anchor Systems
Trumpet
Strand Spacer &
Organizer
Strand
(epoxy coated)
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Sample Anchor Assemblies, Epoxy Coated Strand
Corrosion Protection System In Unbonded Length
P.E. OR P.V.C. SHEATH
GROUT TUBE
P.E. TUBING
CORROSION INHIBITOR
CEMENT GROUT
DOUBLE PROTECTION
Strand Anchor Systems
QUADRUPLE PROTECTION
TYPICAL SECTIONS THRU FREE-STRESS (UNBONDED) LENGTH
STRAND ANCHOR TENDONS
P.E. TUBING
CORROSION INHIBITOR
P.E. TUBING
CORROSION
INHIBITOR
CTS - ENCAPSULATED STRAND
EPOXY COATED STRAND
FLO-FIL - FLO-BOND
OTHER - EXTRUSION COATED STRAND
CTSSTRA1
St-13
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Off-Coiler
Strand Anchor Systems
Horizontal Off-Coiler
St-14
Email: [email protected]
Website: www.contechsystems.com
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Vertical Off-Coiler
Strand Anchor Systems
Vertical Off-Coiler
St-15
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Anchor Heads
Anchor Head Design
B
C
A
TRUMPET, AS REQUIRED
BEARING PLATE, AS REQUIRED
ANCHOR HEAD
Strand Anchor Systems
A: Anchor Head Diameter
B: Anchor Head Height
C: Bearing Plate Hole Diameter
Standard Anchor Heads (can be made restressable)
No. of
A*
B*
Strands
inch
mm
inch
mm
inch
4
7
9
12
15
19
30
47
60
92
5.13
5.50
5.88
7.50
8.00
10.00
11.00
14.25
16.00
18.00
130.18
139.70
149.23
190.50
203.20
254.00
279.40
361.95
406.40
457.20
2.38
2.38
2.75
2.75
3.50
4.00
5.00
7.00
8.00
8.00
60.33
60.33
69.85
69.85
88.9
101.6
127
177.8
203.2
203.2
3.5
4.1
4.25
4.9
5.75
7.1
8.25
9.90
11.84
14.00
*Note: Conversion from inch to mm calculated using 4 significant digits
Numbers rounded to 2. significant digit
St-16
C*
mm
85.73
101.60
104.14
119.38
140.65
175.26
209.55
251.46
300.74
355.6
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Stressing
Stressing Chair
Available for all Anchor Heads up to 19 strands
1" WINDOWS
(TWO)
RESTRAINER PLATE
(ADJUSTABLE)
STRESHE1
A: Anchor Head Diameter
(see drawing and Table “Anchor Head Design” p. St-17)
Strand Anchor Systems
A + 1/8”
Note:
Open stressing chair required for anchors with more than 19 strands and for performance testing with long free stressing length.
St-17
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Stressing
Double Acting Hollow Ram Anchor Stress Jack
HEIGHT
STROKE
Strand Anchor Systems
CYLINDER O.D.
St-18
MODEL
NUMBER
CTS-CBJ-3
CTS-25-8
CENTER HOLE ID.
USAGE
STROKE
1
3.0”
RAM AREA
(INCH2)
MAXIMUM
LOAD @
10,000 PSI
CENTRE
HOLE I.D.
CYLINDER
O.D.
HEIGHT
Collapsed
MATERIAL
WEIGHT
(LBS.)
5.0
25 TONS
0.70"
4.25"
8.00"
ALUM
10
1
8.0"
5.0
25 TONS
0.70"
4.50"
13.00"
ALUM
20
CTS-50
Titan
4.0"
10.3
50 TONS
2.12"
7.50"
9.50"
ALUM
40
CTS-100
4
6.0"
21.0
100 TONS
2.00"
7.00"
12.50"
STEEL
90
CTS-100
4
8.0"
21.0
100 TONS
3.50"
10.00"
16.00"
ALUM
120
CTS-120
5
6.5"
24.3
120 TONS
3.50"
9.50"
14.00"
ALUM
80
CTS-150
6
8.0"
30.0
150 TONS
3.50"
10.00"
15.00"
ALUM
125
CTS-150
6
10.0"
29.5
150 TONS
3.50"
12.00"
19.00"
ALUM
225
CTS-200
7
7.0"
40.0
200 TONS
3.50"
11.00"
17.00"
STEEL
335
CTS-200
7
9.5"
40.0
200 TONS
3.50"
12.00"
19.00"
ALUM
200
CTS-200
9
9.5"
40.0
200 TONS
4.50"
11.50"
21.00"
STEEL
450
CTS-300
12
18.0"
60.0
300 TONS
5.25”
14.00"
27.50"
STEEL
875
CTS-300
12
18.0"
60.0
300 TONS
5.25"
14.00"
34.00"
STEEL
1350
CTS-500
15
14.0"
110.0
500 TONS
8.00"
20.00"
27.50"
STEEL
1830
CTS-800
27
14.0"
160.0
800 TONS
9.50"
26.50"
32.50"
STEEL
3600
CTS-2200
92
35.0"
440.0
2200 TONS
16.00"
38.50"
55.00"
STEEL
13000
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Stressing
Grippers, for bare and epoxy coated strand
2 Part Gripper for bare strand
26 TEETH PER 25.4mm
1 3/8”
O - RING
2”
DETAIL-A
4°
7 ° -+ 10'
DETAIL-B
DETAIL-A
DETAIL-B
FOR 0.6" 270 KSI STRAND
MATERIAL SPECIFICATIONS: 32 mm (1 1/4”) BAR
STOCK 12 L 14 MATERIAL
CROSS-SECTION
CASE HARDNESS: ROCKWELL, ON C-SCALE 59 TO 65,
12/1000 TO 15/1000 DEEP
3 Part Gripper for epoxy coated strand
MATERIAL SPECIFICATIONS:
35 mm (1 3/8”) BAR
STOCK 12 L 14 MATERIAL
DETAIL-A
TOLERANCE:
UNLESS OTHERWISE SPECIFIED 0.4mm (1/64”)
NOTE
THIS GRIPPER HAS BEEN
DESIGNED AND TESTED BY
FLORIDA WIRE CO. FOR USE
WITH 0.6"ø FLO-FIL-BOND,
EPOXY COATED STRAND
7° +
- 10'
12 TEETH PER INCH
O - RING
2"
CASE HARDNESS:
ROCKWELL, ON C-SCALE 59
TO 65, 12/1000 TO 15/1000
DEEP
1.3"
Strand Anchor Systems
TOLERANCE: UNLESS OTHERWISE SPECIFIED 0.4 mm
(1/64”)
DETAIL-A
FOR 0.6" 270 KSI
EPOXY COATED STRAND
CROSS-SECTION
These grippers are tested and approved by CALTRANS
St-19
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Accessories
Strand Coupler
1 3/4" ø
INSPECTION HOLES
strcoup1
STRAND
3 3/4"
3 3/4"
7 1/2"
Strand Anchor Systems
THIS COUPLER DEVELOPS THE MINIMUM ULTIMATE STRENGTH OF
THE 0.6”/270 KSI SEVEN WIRE STRAND
Notes:
1. Clean cut end of strand and debur (chamfer).
2. Mark strand to check proper engagement.
3. Check couplers (inside) to make sure that grippers are clean and springs are in
place.
4. Push strand into coupler and check proper engagement.
5. If strand is not properly engaged, open coupler, push grippers over strand (+1/2”,
12.7 mm) and close coupler.
6. To assure proper gripping, coupler may be pre-tensioned with monostrand jack.
St-20
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Accessories
Organizers
CORRUGATED H.D.P.E OR P.V.C. SHEATH
2 1/2"
ORGAINZER
TYPICAL CTS-ORGANIZER, UP TO 9 STRANDS
0.D. 2 1/4" ø (56MM)
D
N
A
)
R
T
M
S
1M
D
E
(4
IZ
ø
N
8"
A
G
5/
R
1
O
F
.O
.D
O
I.D. 1 15/16" ø (49MM)
1/8"
ORGAINZER
1 13/16" ø (46MM)
CORRUGATED H.D.P.E OR P.V.C. SHEATH
Strand Anchor Systems
(LARGER, UP TO 60 STRAND, ALSO AVAILABLE)
MATERIAL SPEC.:
HARD P.V.C.
OR H.D.P.E.
TYPICAL CTS-ORGANIZER, UP TO 4 STRANDS
CTSSPAC1
St-21
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Accessories
Centralizer
*
SCP STRAND
LOCATION
DRILL HOLE ø
D
d
DCP AND SCP STRAND
OR BAR ANCHORS
OR SOIL NAILS
LENGTH
DCP STRAND OR BAR
SCP STRAND
Strand Anchor Systems
CTS CENTRALIZER SPECIFICATIONS
NOMINAL
PIPE SIZE
(INCHES)
SER. 200
(INCHES)
.75
.87
1.00
INSIDE DIAMETER 'd'
1.14
SCHED. 40
(INCHES)
OUTSIDE
DIAMETER
(INCHES)
MIN. WALL THICKNESS
SER. 200
(INCHES)
SCHED. 40
(INCHES)
SHAPED DIAMETER 'D'
FROM O.D.
(INCHES)
TO O.D.
(INCHES)
.80
1.05
.080
.113
2.0
4.0
1.03
1.31
.080
.133
2.0
6.0
1.25
1.48
1.36
1.66
.080
.140
3.0
6.0
1.50
1.70
1.59
1.90
.090
.145
3.0
8.0
2.00
2.13
2.05
2.37
.113
.154
4.0
10.0
2.50
2.58
2.45
2.87
.137
.203
4.0
14.0
3.00
3.15
3.04
3.50
.167
.216
5.0
18.0
CENTRAL1
- CTS Centralizers are manufactured from high quality plastics and are custom made to
meet all your specifications.
- Centralizer according to specifications on job
- If not otherwise specified, space 10’ on centre within bond length
St-22
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Accessories
Standard Single Wing Centralizer
2 1/2" ø
NYLON CABLE TIES
OR 2 ROUNDS OF RE-BAR WIRE
ON 2 LAYERS OF DUCT TAPE
3" TO 6" DRILL HOLE ø
.
IN
R = 3" (NORMAL)
(VARIES IF SPACER IS PUSHED
TOGETHER OR PULLED APART)
Installation Instructions
1.
Lay out CTS - Centralizers (curve up) as shown in detail A.
2.
Cut duct tape and tape onto centralizers (top and bottom)
3.
Wrap pre-assembled centralizer unit around anchor with legs of unit secured in notch
of corrugations.
4.
Tighten one end of unit with nylon cable tie or 2 rounds of re-bar tie wire.
5.
Repeat 3 and 4 at other end. Centralizer leg can be secured in different notches to
adapt to different hole diameterc
6.
NOTE: Use at least 4, to a maximum of 6 centralizers per unit.
7.
Spacing as per specifications or minimum 5’ on centre
Strand Anchor Systems
M
MIN.
Banana1
1/8"
7/
8"
DETAIL A
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Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Strand Anchor Systems
Heavy Duty (HD) Double Wing Centralizer
Please note:
Installation instructions
on page 25
St-24
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Post Grouting System
POST - GROUTING SYSTEMS
PREAMBLE
Post-Grouting improves the bond between the anchor grout and the soil
by creating pressure zones (bulbs) at the location of the valves on the
post-grout line. It is mainly used in cohesive soils to increase the skin
friction.
The CTS post-grouting system is a single line system with an internal
flushing line (ring lines have been used as well in the past but found to
take up to much space in the drill hole).
Installation Sequence
1. After the grout line is assembled (glued together) the line should be
taped to the anchor with the bottom of grout line two ft up from the
bottom of the anchor.
2. Place first stage anchor grout through separate grout line (neat
cement grout or with sand or gravel added). If neat cement grout,
water cement ratio should be W/C = 0.45.
Strand Anchor Systems
The enclosed (full size) drawing shows all the details. A valve section
consists of a 20 ft. PVC pipe C/W 4 valves and one end cap. If required
an additional valve section (20 ft) can be glued to the first one at the
bell end. At the upper end of the grout pipe (PVC) a thread adapter
should be glued on.
3. Immediately after first stage grouting flush out post grout line with
clean water by pushing down the flush line to the bottom of the post
grout line. If water runs out clear, pull out flush line and leave water
inside post-grout line.
St-25
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Post Grouting System
4. After initial set or max. twenty four hours after the first stage
grouting start pressure grouting through the post grout line with a
high pressure pump capable of 1000 PSI. First start with water to
open the valves, this could take up to 1000 PSI pressure.
5. When pressure drops (valves open up) or no significant pressure
rise, switch over to neat cement grout W/C of0.5 to 0.6. NOTE:
Make sure that grout is mixed thoroughly and is without any lumps.
Pump grout until pressure rises. If pressure does not rise after
several bags of cement, stop pumping and flush out grout line with
water.
6. Twenty four hours later repeat 5 above until a pressure of at least
400 PSI is reached (depending on ground conditions, final pressure
should be between 200 and 100 PSI). Flush out grout line with
water.
Strand Anchor Systems
7. After anchor is successfully tensioned fill post-grout pipe with grout.
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BELL END
SECTION
4'-0"
A
1/2" I.D.
P.V.C. PIPE
RUBBER VALVE
4'-0"
Strand Anchor Systems
4'-0"
SECTION
2'-0"
B
B
PVC5
MINIMUM OF 2 VALVES
BOTTOM VALVE 4'-0" FROM END OF ANCHOR
AND 2'-0" FROM END OF END CAP
END CAP
GLUED ON
GROUT HOLE
VALVES AT 4'-0" O.C.
NOTES:
RUBBER VALVE
1/2" SCHED. 40 P.V.C. (BELL ENDS)
POST-GROUT PIPE (0.84" O.D.)
OTHER SPECS AVAILABLE AS WELL
WATER FLUSH LINE
A
20' PIPE SECTION
WATER FLUSH LINE
3/8" O.D., 1/4" I.D. TUBE
1000 PSI
PRESSURE GROUT HOSE FITTING
Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
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Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Post Grouting System
GROUT
PUMP
500 - 1000 PSI
(35 - 73 BAR)
POST GROUTING
VALVES
COUPLING
GAUGE
CTSPOST2
ANCHOR
INSERT FLUSH LINE
AT COUPLING
Strand Anchor Systems
CIRCULATION LINE
HOPPER
GROUT
MIXER
Flow Diagram
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Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Geotextile Grouting Sock
Geotextile Grouting Sock
GROUT TUBE
CLAMP
GROUTING SOCK
NOTES:
1. Tape grout tube to anchor, starting
1’-0” from bottom of anchor.
2. Place geotextile sock over anchor
and grout tube.
3. Fix and tighten the ends of the sock
by wire or hose clamps.
4. Tape sock (not too tight) to anchor.
5. Insert anchor into drill hole.
CLAMP
6. Pump grout through grout tube
inside sock with 8 to 12 bar (100
psi) pressure and fill and expand
the sock. Effected by this pressure
grouting, the grout mix is dehydrated, the water is pressed out of the
fine mesh leaving the cement to
cure faster.
Strand Anchor Systems
ANCHOR
GEO-SOCK
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Con-Tech Systems Ltd.
Western D ivision: (604) 946-5571
Eastern D ivision: (61 3) 342-0041
Email: [email protected]
Website: www.contechsystems.com
Geotextile Grouting Sock
Geotextile Grouting Sock Specifications
MATERIAL SPECIFICATION
Strand Anchor Systems
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NONWOVEN
TEST
METHOD
UNITS
GRAB TENSILE STRENGTH
ASTM D-4632
N
400
GRAB TENSILE ELONGATION
ASTM D-4632
%
50
MULLEN BURST
ASTM D-3786
kPA
1551
PUNCTURE
ASTM D-4833
N
290
TRAPEZOID TEAR
ASTM D-4533
N
200
UV RESISTANCE
ASTM D-4355
%
70
APPARENT OPENING SIZE
ASTM D-4751
UM
200
PERMITTIVITY
ASTM D-4491
s-1
FLOW RATE
ASTM D-4491
l/(s*m2)
PROPERTY
4545-C14
2.5
119