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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

10

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

41

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

53

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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

3

Table 33 05 23.16 -14

5

Steel casing shall be provided with a factory applied bituminous coating complying with ANSI 21.4.6

7

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

21

PART 3 - EXECUTI0N2223

GENERAL24

Comply with applicable requirements of Section 33 05 23.13 -UTILITY HORIZONTAL DIRECTIONAL25

DRILLING.26

27

If multiple borings are required, limit work to a single location at a time.28

29

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

34

Install casing to line and grade as shown on the plans. Alignment shall be within 0.5 horizonatally and350.25 vertically.36

37

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

43

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Install carrier pipes in accordance with applicable carrier pipe specification sections.1

2

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

10

Seal the ends of casing pipes with casing end seals.11

12

13

END OF SECTION14