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DFD Project No.
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SECTION 33 05 23.161
PIPE JACKING2
BASED ON DFD MASTER SPECIFICATION DATED 10/1/201234
This section has been written to cover most (but not all) situations that you will encounter.5Depending on the requirements of your specific project, you may have to add material, delete6items, or modify what is currently written. The Division of State Facilities expects changes and7
comments from you.89
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PART 1 - GENERAL11
12
SCOPE13
The work under this section shall consist of providing all work, materials, labor, equipment, and14
supervision necessary to complete boring and jacking and other work, as required in these specifications,15
on the drawings and as otherwise deemed necessary to complete the work. Included are the following16
topics:17
PART 1 - GENERAL18
Scope19
Related Work20
PART 2 - MATERIALS21Steel Casing Pipe22
Casing Pipe End Seals23
Casing Spacers24
PART 3 - EXECUTION25
General26
Excavation27
Casing Pipe Installation28
Carrier Pipe Installation29
30
RELATED WORK31Applicable provisions of Division 1 govern work under this Section.32
(Note to the Designer: Include any additional related work sections)33
02 00 00
Existing Conditions3402 32 00 Geo Technical Investigation35
31 25 00 Erosion Control36
31 20 00 Earthmoving37
31 23 16.13 Trenching38
33 05 23 Trenchless Utility Installation39
01 56 00 Temporary Barriers and Enclosures40
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PART 2 - MATERIALS42
43
Note to the Designer: Edit material requirements as necessary to account for local variations in44material availability. Comply with the substative requirements of the materials described below.45
46
STEEL CASING PIPE47
Provide steel casing pipe complying with ANSI B36.10, current version. Steel casing shall be rated for48
minimum yeild strength of 35,000 psi.49
50
Casing shall be sized as shown on the plans or larger as necessary to provide a minimum of 2 clearance51
between the inside of the casing pipe and nearest point on carrier pipe bell or other fitting.52
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Unless otherwise noted on the plans, casing wall thickness shall be as indicated on Table 33 05 23.16 -11
2
Casing Nominal Diameter
(inches)
Minimum Wall
Thickness
(inches)
12 or less 0.188
14 0.28216 0.282
18 0.313
20 0.344
22 0.375
24 0.407
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Table 33 05 23.16 -14
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Steel casing shall be provided with a factory applied bituminous coating complying with ANSI 21.4.6
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CASING END SEALS8
End seal system manufactured for the sole purpose of sealing the ends of casing pipes. Seal shall be9
properly sized to fit over both the casing and carrier pipes. End seal shall be constructed of 1/8 thick10
synthetic rubber and provided with stainless steel clamps to provide water-tight seal around both pipes.11
Provide Cascade Waterworks Manufacturing, PSI Pipeline Seal and Insulator, PowerSeal Pipeline12
Products, or approved equal.13
14
CASING SPACERS15
Spacer system manufactured for the sole purpose of supporting carrier pipes within casing pipes. Spacer16
system shall be manufactured of stainless steel and durable plastic components. Spacers shall attach17
securely to carrier pipes so that they do not slip or rotate. Spacers shall be provided with abrasion resistant18
dielectric skids with a low coefficient of sliding friction. Provide Cascade Waterworks Manufacturing, PSI19
Pipeline Seal and Insulator, PowerSeal Pipeline Products, or approved equal.20
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PART 3 - EXECUTI0N2223
GENERAL24
Comply with applicable requirements of Section 33 05 23.13 -UTILITY HORIZONTAL DIRECTIONAL25
DRILLING.26
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If multiple borings are required, limit work to a single location at a time.28
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CASING PIPE INSTALLATION30
Advance casing by method of boring and simultaneously jacking.31
32
Remove spoil using mechanical methods; washing or sluicing of soil is not allowed.33
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Install casing to line and grade as shown on the plans. Alignment shall be within 0.5 horizonatally and350.25 vertically.36
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Provide steel carrier pipe joints with butt welds in accordance with AWS D100.38
39
CARRIER PIPE INSTALLATION40
Install carrier pipe to line and grade shown on plans. Alignment shall be within tolerances specified in41
applicable carrier pipe specification sections.42
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Install carrier pipes in accordance with applicable carrier pipe specification sections.1
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Carrier pipes joints located within casing pipes shall be provided with restrained joints.3
4
Carrier pipes shall be uniformly supported within casing pipes using casing spacers. Casing spacers shall5
be installed as recommended by pipe and spacer manufacturers, but not greater than 7 O.C.. 6
7If required by the plans, completely fill the annular space between carrier pipe and casing pipe using blow8
sand or flowable fill.9
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Seal the ends of casing pipes with casing end seals.11
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END OF SECTION14