In-Line Gravity Sewer Replacement Pipe Bursting & Reaming Methods. Presenter: Todd Randell

Transcription

1 In-Line Gravity Sewer Replacement Pipe Bursting & Reaming Methods Presenter: Todd Randell

2 What we are going to cover Overview of Trenchless Technology What is 1. Reaming or Pipe-Eating 2. Pipe Bursting Overview. HDD Cluster Pulls World record attempt USA

3 Trenchless Technology Overview New Construction Renewal Hor. Earth Boring Jacking Utility Tunnelling Rehabilitation Renovation Horizontal Directional Drilling Guided or Auger Boring Micro- Tunnelling Pipe Ramming Tunnel Boring Impact Mole Cement Mortar Epoxy Polyurethane Spray Lining Localised Repair (NDSR or no dig spot repair) Cured-In-Place Pipe Close Fit Lining Slip-lining Melted-In-Place Pipe Spiral Wound Pipe Fold & Form Insert & Inflate In-line Replacement Manhole Repair Reaming or Pipe Eating Pipe Bursting Pipe Slitting Hydraulic Winching Static Pneumatic

4 Our Focus Today In-line Replacement Methods Pipe Reaming Pipe Bursting Pipe Slitting Static Pnuematic Hydraulic Winching

5 What is Pipe Reaming? Also known as pipe eating. Mater those workman are rehabilitating that ol sewer pipe right under our wheels! Wow. Lightning McQueen, how d they do that? Drill Rod New product pipe Clay or earthenware host pipe Under rotation Reaming head under full rotation A gravity sewer or storm water pipe rehabilitation method - providing a 100 year asset life.

6 What is Pipe Bursting? PB is not how we describe pipe slitting. New product pipe Wire cable Host pipe

7 Pipe Bursting GROUND CONDITIONS DIFFICULTY SCALE Easier Original compacted backfill Soft to medium clay Loose to medium dense sand Loose sand gravel & cobbles Dense sand under groundwater Dense gravel & cobbles Stiff to hard clay Rock Almost impossible!

8 Pipe Bursting RISK CLASSIFICATION SCALE Routine Challenging Extremley Challenging Existing Pipe 100mm 300mm 300mm 500mm > 500mm New Pipe Same size, One up size in diameter Two up-sizes Three or more upsize in diameter Burst Length 150m 150m 400m > 400m Depth < 3.6m 3.6m 5.5m > 5.5m Soils Compressible (soft clay, loose sand) Moderately compressible (medium to stiff clay, medium dense to dense sand) Incompressible (hard clay, very dense sand, rock) Adapted from the International Pipe Bursting Association Guideline Specification for the replacement of mainline sewer pipes by pipe bursting

9 Pipe Bursting Site Investigation Focus on potential showstoppers. Close existing utilities Soils Rock, hard or very dense soils & soft or loose soils Highly confined trench width or heavily compacted backfill Steel fittings/connections Study water main maintenance records Precast supported pipes ALMOST IMPOSSIBLE!

10 Where to obtain more information ProjectMax. on Pipe Bursting International Pipe Bursting Association Contact Iplex Technical Services Team.or go to; html search using pipe bursting.

11 Successful installations in many NZ cities including: Whangarei, Northshore, Auckland, Hamilton, Tauranga, Whakatane, Rotorua, New Plymouth, Wanganui, Levin, Hastings, Napier, Masterton, Carterton, Upper/Lower Hutt, Porirua, Wellington, Nelson, Blenheim, Kaikoura, Christchurch, Timaru, Oamaru, Dunedin & Invercargill. Pipe Bursting

12 Pipe Bursting Review Proper planning is critical to achieve success. Planning accounts for the majority of time spent on a PB project. Example: Minimal planning = a lot of time on site. Specifications are important explain who owns the risk in tender documents!!!! The more risk to the contractor the higher the price!!!! So sharing construction risk makes sense.. Up to 100 year asset life once installed correctly.

13 Pipe Reaming Mater those workman are rehabilitating that ol sewer pipe right under our wheels! Wow! Lightning McQueen how d they do that? Drill Rod New product pipe Clay or earthenware host pipe Under rotation Reaming head under full rotation A gravity sewer or storm water pipe rehabilitation system - providing a 100 year asset life.

14 Pipe Reaming Uses a traditional HDD rig. With a special pipeeating reamer attached.

15 Pipe Reaming Drill Rid The drill-rods are drilled through the ground as normal. Entering the existing sewer.

16 Drill rods are pushed through the host pipe. Pipe Reaming

17 Exits into a pre excavated pit or manhole. Pipe Reaming

18 Pipe Reaming A special pipe-eating reamer is attached. And pulled back under rotation eating or grinding out the old pipe. Pulling a new pipe behind.

19 Pipe Reaming During reaming the hostpipe is dis-integrated. The host-pipe is groundup and carried out within the drilling fluid or drillmud. Drill Rod Reaming or eating head Under rotation

20 One of NZ s longest Pipe Reaming Projects

21 Pipe Reaming A pre exposed lateral connection drill rods visible

22 Pipe Reaming Reamer passing through

23 Pipe Reaming Grinding out the old pipe along the way

24 Pipe Reaming Note: In this case drilling fluid function turned off to allow clear visibility for the photographer

25 Pipe Reaming Reamer approaching the host pipe

26 Pipe Reaming New pipe now pulled through the lateral pit

27 Pipe Reaming A sample of pipe exhumed from this lateral after being pulled through the ground for 300m no deep scoring visible.

28 Pipe Reaming GROUND CONDITIONS Original compacted backfill Soft to medium clay Loose to medium dense sand Loose sand gravel & cobbles Dense sand under groundwater Dense gravel & cobbles Stiff to hard clay Rock DIFFICULTY SCALE Easiest Almost impossible! NATIVE PIPE MATERIALS Clay/Earthenware Un-reinforced concrete *Asbestos cement Pipes laid in concrete Reinforced concrete *WorkSafe NZ procedures must be followed to prevent asbestos poisoning.

29 Pipe Reaming RISK CLASSIFICATION SCALE Routine Challenging Extremley Challenging Existing Pipe 100mm 300mm 300mm 500mm > 500mm New Pipe Same size, One up size in diameter Two up-sizes Three or more upsize in diameter Burst Length 150m 150m 400m > 400m Depth < 3.6m 3.6m 5.5m > 5.5m Soils Compressible (soft clay, loose sand) Moderately compressible (medium to stiff clay, medium dense to dense sand) Incompressible (hard clay, very dense sand, rock)

30 Pipe Reaming Site Investigation Focus on potential showstoppers. Close existing utilities Soils Fraq out. Rock, very dense soils, soft or loose soils Heavily compacted backfill Avoid reaming; Pipe laid in concrete & reinforced concrete pipe.

31 Product Pipe Types for Pipe Bursting or Reaming Installations 1. Pipe-String method

32 Product Pipe Types for Pipe Bursting or Reaming Installations 1. Pipe-String method 2. Cartridge method

33 Pipe Reaming Past Projects Successful installations in many NZ cities including: Auckland, Hamilton, Tauranga, Christchurch, Ashburton, Timaru & Invercargill.

34 Where to obtain more information on Reaming Ditch Witch NZ Ltd. Nowak Pipe Reaming Inc. ology.html search using pipe reaming or pipe-eating

35 HDD rig availability in New Zealand Hundreds if not thousands are operating installing the fibre network around NZ. Eventually they will become available..? Could they be useful to renew sewer assets using reaming methods?

36 Benefits when employing Reaming Methods No loss of hydraulic performance. Less disruption to close-by surrounding assets. Small work site footprint & low social impact. 100 year asset life.

37 Questions?

38 The worlds longest straw Power Cable Conduits Clients: Padre Island Water Line Improvements Project Bridges Specialties; Mears Group, Inc. 5,535 LF (1687m) HDD of 4 DR 14 FPVC conduit (single pull, uncased) Parallel 5,545 (1690m) HDD installation of 18 DR 18 Fusible PVC waterline Intersect drill using a million pound rig & 140,000 LB 38 Company Confidential

39 HDD Cluster Pull, Casings & Conduits Woodbridge, NJ Power Cable Conduits & Casings Clients: Woodbridge Energy Center Carson Corporation 11,000 LF (3353m) of 30 DR25 FPVC conduit casings (6) HDDs: (2) 2,500 LF, (2) 1,600 LF, (2) 1,400 LF (4) bundle of 8 DR21 IPS FPVC conduits sliplined into each casing (45,000 LF total) Wheeled spacer bundles located every 5 LF Casings to be thermally grouted Project completion August/September Company Confidential

40 Slipline Installation of FPVC Conduits - Hackensack, NJ Power Cable Conduits Clients: PSEG New Jersey and J. Fletcher Creamer & Son, Inc. 15 bundle: (10) 6 and (5) 5 FPVC conduits Installed in 1,500 LF (457m), 36 steel casing (22,500 LF (6800m) of conduit) Fuse, de-bead, bundle and pull sequential operation with limited layout space 6 conduits carry 69 kv high voltage power cables; 5 conduits carry 26/13/4 kv power cables (future capacity) 40 Company Confidential

41 HDD Installation of FPVC Conduits - Lexington Park, MD Power Cable Conduits Clients: (SMECO) Southern Maryland Electric Cooperative Mears Group, Inc. (2) 4,400 LF (1341m) HDD crossings with total of (7) 8 DR14 FPVC conduits Direct HDD pull-in (no casing) with conduits pulled in loose (no banding or bundling) Full length of conduits fused and de-beaded prior to pull-in Conduits carry 230 kv XLPE high voltage power cables 41 Company Confidential

42 HDD Installation of FPVC Casings & Conduits - Malden, MA Power Cable Conduits Clients: National Grid, Haley & Aldrich (2) 1,100 LF (335m) HDD crossings with (6) bundle of 8 DR14 FPVC conduits per crossing (13,200 LF of conduit) Direct HDD pull-in (no casing) with conduits pulled in loose (no banding or bundling) Full length of conduits fused and de-beaded prior to pull-in Conduits carry 23 kv voltage power cables 42 Company Confidential

43 Horizontal Directional Drill World Record attempt in planning. Late 2014 Early 2015 Contractor: Mears Group Inc. > Ballasted Pipe Pull New Jersey 1,100,000 Lbs Prime Drilling GmbH Maxi-Rig 43

44 What we have covered Overview of Trenchless Technology What is 1. Reaming or Pipe-Eating 2. Pipe Bursting Overview. HDD Cluster Pulls World record attempt USA

45 Questions?