Pipe Bursting Project Considerations
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This document discusses several project considerations for pipe bursting projects, including: - What types of pipes can be burst (fracturable like clay vs non-fracturable like steel) - Factors like soil conditions, depth of existing line, length of burst, new pipe material selection, and current video of the existing line. - It also addresses common questions around bursting and notes pneumatic, static, impactor and compact are different bursting system options.
Pipe Bursting Project Considerations
- 1. PROJECT CONSIDERATIONS PIPE BURSTING
- 2. WHAT MATERIALS CAN BE BURST? Fracturable Pipes Cast iron, clay tile, concrete, reinforced concrete, asbestos cement, etc. Non-fracturable Pipes Ductile iron, steel, galvanized (require use of specialized tooling and static bursting machines. PROJECT CONSIDERATIONS
- 3. IPBA PROJECT CLASSIFICATION Project classifications per IPBA (International Pipe Bursting Association) pipe bursting specification. PROJECT CONSIDERATIONS
- 4. UPSIZING: A CLOSER LOOK Note: Illustration assumes flow line remains the same. PROJECT CONSIDERATIONS
- 5. UPSIZING: A CLOSER LOOK Note: Illustration assumes flow line remains the same. PROJECT CONSIDERATIONS
- 6. UPSIZING: A CLOSER LOOK Note: Illustration assumes flow line remains the same. PROJECT CONSIDERATIONS
- 7. UPSIZING: A CLOSER LOOK Note: Illustration assumes flow line remains the same. PROJECT CONSIDERATIONS
- 8. UPSIZING – EXPANSION (WHERE IT GOES) Approximately 90% of compaction occurs upwards from the existing line. PROJECT CONSIDERATIONS
- 9. UPSIZING AND DEPTH • Has flow monitoring been completed? • Is upsizing necessary if I/I is eliminated? • A minimum of 4’ (1.2m) of cover should be used when upsizing one size • Greater cover should be used if upsizing more than one size Note: any compaction recedes over time. The deeper the line, the less chance of surface disruption. PROJECT CONSIDERATIONS
- 10. DEPTH OF COVER General rule is one (1) foot of cover for every inch of expansion 8” DIPS Burst Head Expander OD – 11.50” 6” Clay Pipe Existing Pipe ID – 5.94” PROJECT CONSIDERATIONS
- 12. WHAT SURROUNDS THE EXISTING PIPE? • Sand? • Clay? • Rock? • Voids from exfiltration? PROJECT CONSIDERATIONS
- 13. GOING THE DISTANCE • Static Energy • Pipe Friction •Increase Winch Pulling Pressure •Lubrication (20 Tons) •Tractor Effect • Impact Energy •Entry Pit Length –Use the largest Hammer for the job • Soil Memory –Race against time PROJECT CONSIDERATIONS
- 14. DEPTH OF EXISTING LINE • Entrance and exit pit depths? • Can we dig an entry pit? –Entry pit length is minimum 2 ½ times depth –With pipes larger than 12” diameter length of entry pit will increase • Can we manhole exit? –8, 10 & 12” single upsize • Can we dig an exit (receiving) pit? PROJECT CONSIDERATIONS
- 15. LENGTH OF BURST • How Long is the Burst? –Bypass Needed? –Number of Services? –Has One Call been Contacted? –How Close are the are the other Utilities? PROJECT CONSIDERATIONS
- 16. NEW PIPE QUESTIONS • What kind of new pipe? • IPS or DIPS? (OD) –Important for burst head adaptability –Existing clay to DIPS is a single upsize • What is the SDR Rating –Recommend a minimum of SDR17 for pipe bursting with HDPE PROJECT CONSIDERATIONS
- 17. NEW PIPE MATERIAL • HDPE is preferred pipe when pipe bursting • Fusible PVC, Terrabrute, Ductile and Clay have been used successfully but require additional project and site considerations. PROJECT CONSIDERATIONS
- 18. FLOW COMPARISONS: HDPE PROJECT CONSIDERATIONS
- 19. FLOW COMPARISONS: HDPE PROJECT CONSIDERATIONS
- 20. Use of Lubrication (Lube Manifold) Large or long bursts: lubrication can increase production and the bursting distance capability Small Dia. Medium Dia. Large Dia. Large Dia. (6”-10”) Good Soil (12-16”) Poor Soil (16” and larger) PROJECT CONSIDERATIONS
- 21. Current Video Available • Current video is very important • Scenario: We have a video, but it is 2 years old. • Problem: What has happened to the line in the last 2 years. –Point repair on clay line with ductile repair section and steel bands PROJECT CONSIDERATIONS
- 22. Current Video • Is there a dip in the line? • Is there a swell in the line? • Is a point repair needed prior to bursting? PROJECT CONSIDERATIONS
- 23. Common questions • What about pipe scratches on the new HDPE • How do you go around bends • What about damage to other utilities with the expansion that takes place • Our plans are bad for old lines, how do you deal with this • How does the equipment work if there is a line repair • How long can you burst • How big can you burst PROJECT CONSIDERATIONS
- 24. Common questions • We need to chlorinate the pipe after it is installed and wait 2 days to hook people back on service • How do you connect to existing pipe materials and services • Who around here is doing this, I don’t want to be first • How much does the equipment cost • I am concerned about taking the risk of trying something new and don’t want the responsibility PROJECT CONSIDERATIONS
- 25. System Selection • Pneumatic systems • Static systems • Impactor systems • Compact systems PROJECT CONSIDERATIONS
- 26. THANK YOU FIRST NAME LAST NAME PRESENTER TITLE E: info@hammerheadmole.com P: 800.331.6653 | INT: +1.262.567.8833 | F: 262.567.5068 W: www.hammerheadtrenchless.com