REHABILITATION OF WATER NETWORK

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REHABILITATION OF WATER NETWORK
Bc. Petr Kohoutek
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Water Network in Czech republick

• Water network 48 850 km
• House connections 12 900 km
• In sum 61 750 km

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Age of water network in CZ

• In Czech republick is over 20 water network
  older 60 years
• Needs of rehabilitation in CZ 2 - 2,5 of
  lengh (c. 1235 km every year)

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No-Dig Technologies

• No-Dig technologies are alternate to work in open
  excavation.
• Benefits
• Shorter construction time
• Minimum disturbance of terrain
• Lower building costs
• Thriftiness to environment
• Disadvantages
• Heftiness to technical equipment
• Compliance technology work (observance of
  construction of rehabilitation)

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No-Dig Technologies

• Non - destructive techniques - renovation of old
  pipes
• Destructive techniques renewal /replacement of
  old pipes

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• Non - destructive methods of renovation of water
  networks
• Cement Mortar Lining
• CIPP (cured-in-place pipe) techniques
• Close Fit Lining
• Pulling of new pipes in old pipes (Relining)

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Cement Mortar Lining

• Coatings based on cementitious materials
• for DN 80 3000
• Old pipelines cast iron, steels, concrete,
  asbestos - cement.

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Cement Mortar Lining
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CIPP methods
A cured-in-place pipe (CIPP) is one of several
trenchless rehabilitation methods used to repair
existing pipelines. CIPP is a jointless,
seamless, pipe-within-a-pipe with the capability
to rehabilitate pipes ranging in diameter from DN
100 to 1500. As one of the most widely used
rehabilitation methods CIPP has application in
water, sewer, gas, and chemical pipelines
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Close Fit Lining

• Close fit lining is a term used to describe a
  range of techniques for renovating pipelines, in
  which the cross section of the liner is
  temporarily deformed before insertion into the
  carrier pipe. The liner is subsequently restored
  close to its original diameter, forming a close
  fit with the original pipe.
• The liner is deformed by either reducing its
  diameter or changing its shape. To do this the
  liner can either be passed through tapered dies,
  through rollers or be folded, either on site or
  in the factory. After insertion into the carrier
  pipe the liner is reverted, either by natural
  relaxation or through the application of steam or
  water under pressure. Each close fit lining
  system uses a different combination of
  deformation and reversion methods.

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Pulling of new pipes in old pipes

• New pipes has smaller outside diameter than
  inside diameter of an old pipelines.
• New pipes
• PE
• steel
• cast iron
• DN 80 - 2000, max. lenght 700 m

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• Destructive methods of renewal of water network
• Pipe Bursting old pipelines are destroyed static
  or dynamic
• Hydros technology - trenchless replacement and
  laying of new pressure pipelines
• Pipe Splitting The pipe splitting method was
  developed by the Water Supply Company of Berlin,
  in order to carry out trenchless lead pipe
  replacement with HDPE pipes within the field of
  house connections. However, the trenchless
  replacement of lead pipes is difficult due to
  their unstable structure. They tear easily or are
  deformed by compression, therefore they cannot be
  simply pulled or pushed out of the soil like,
  e.g. steel pipes.

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Pipe Bursting

• When applying the dynamic pipe bursting method,
  you pull the bursting machine - supported by a
  winch - through the old pipe meant to be renewed.
  During this procedure, the old pipe is destroyed
  by dynamic impact energy, the fractured particles
  are pushed into the surrounding soil. The new
  line, in the same width or one size larger, is
  pulled in at the same time. The old pipe may
  consist of stoneware, asbestos, plastic or plain
  concrete.Behind bursting head is indraft new
  conduit to the incurred space
• Material of old pipelines cast iron, PVC
• Material of new pipes PE, PVC
• This method is possible applied for diameters to
  the DN 300

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Hydros technology

• Hydros boy, lead, plus,
• hydrosPLUS - Trenchless technology for
  replacement of mains for the drinking water and
  gas supply up to diameters of DN (nominal
  diameter) 400 (400 mm) and individual pulling
  sections with lengths of up to 150 m.

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Pipe Splitting
Winch boom installed in the pit, Grundopull
standing outside the pit
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Studies of Rehabilitation of Water Network in
the city Votice
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Choice section for renovation
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Thank for attention
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Rehabilitation of sewer networks
BRNO UNIVERSITY OF TECHNOLOGY, FACULTY OF CIVIL
ENGINEERING, INSTITUTE OF MUNICIPAL WATER
MANAGEMENT

• PRESENTATION BACHELOR'S THESIS

Bc. Petr Charamza
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Introduction

• No-dig methods rehabilitation of sewer networks.
• Information are applied on studies of
  rehabilitation of sewer network in village
  Kozlovice in Prerov.

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No-dig methods of rehabilitation of sewer
networks.
No-dig technologies classify into Repair,
Renovation, Renewal (Replacement)

• Repair

Robotic Systems
Injection technique  (e.g. methods penetrin,
sirkit)
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Repair of sewer network - method Penetryn

• Repair
• - joint leakage
• - lengthwise and transverse cracks
• - repair of sewer connections
• It is possible for repair of pipeline
• - shaped cross sections circular, oval
• - with smooth, no rusted inside pipe surface,
• - and with a partial flow special packery.

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Penetryn method
1 - wind with pulleies, 2 technological van, 3
- packer, 4 - observant openings, 5 - sealing
gel, 6 video camera, 7 - padding
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No-dig methods rehabilitation of sewer networks.

• Renovation

methods of sealing (method sanipor)
methods of lining
methods of relining
cement mortar lining
CIPP (cured-in-place pipe) methods
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Relining methods

• Pulling of new pipes to the old pipe
• Pulled pipe must have smaller outside diameter
  than smallest inside diameter of old pipe.
• it is use for static unbearable pipe, for
  modification non-pressure pipes to pressure
  pipes.
• Methods of relining
• relining of short pipes
• relining of long pipes (PE)
• spirally wound lining
• close fit polyethylene lining technique (Subline,
  Swagelining, Rolldown)

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CIPP methods (cured-in-place pipe)

• Relinig of pipes from geotextile which has
  interior face from polyethylene and exterior face
  is impregnate with polyester resin.
• Using for circular and non-circular pipes.
• New pipe is pulling into the old pipe by the help
  of water pressure, steam and air.
• Methods of hardening
• hot water hardening (e.g. Insituform, Kawo)
• steam hardening (e.g. Phoenix)
• UV hardening (e.g. Inpipe)

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CIPP - hot water hardening
1 - refrigerator wagon, 2 - belt conveyor, 3 -
heating unit, 4 - inverse tower, 5- pressure
water column, 6 - padding, 7 - sleeve, 8 -
heating hose
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Methods of rehabilitation of sewer networks
exchange of pipeling in open excavation

• Renewal
• (Replacement)

no-dig technologies
Breaking the old pipe, Pipe Bursting method
(dynamic, static)
Pipe Eating method
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Pipe bursting method - static

• It use to replacement of old pipes from fragile
  material.
• Pipe bursting with expander.
• Pulling of new pipes.
• speed of execute work is about 15 m/hour

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Information are applied on studies of
rehabilitation of sewer network in village
Kozlovice /Prerov.
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Studies of rehabilitation of sewer network in
village Kozlovice/Prerov.

• Village Kozlovice is situated on left bank of
  river Becva (northeast of Prerova). Village has
  combined stormwater-sewerage systems - main sewer
  2,3,4 and collective sewer 1.
• Description of reconstructed sewer
• Old sewer is situated in centre of village
• Section 2, 2.1 and 2.2
• Parts of sewer 2 and 2.2 are situated on
  frequented Grymovska street,
• Sewer 2.1 and part of sewer 2 are situated in
  residential street - behind the school.

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Actual state

• - Monitoring from firm SEZAKO Prostejov, s.r.o.
• - report from monitoring evidences - sewer is
  rusted, joint leakage.

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Using of methods for rehabilitation of sewer
networks

• No-dig technologies
• CIPP (Insituform, KAWO methods) renovation of
  parts of sewer 2 and branches sewer 2.2. Sewers
  are situated in the centre of communication -
  communication is in excellent state.
• Open excavation
• Open excavation - parts of sewer 2 and branches
  sewer 2.1, finds in the street behind the school.
  Sewer are situated in the centre of
  communication. Surface of road is in disastrous
  state.

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Street behind the School, part sewer 2
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Design of sewer rehabilitation
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• Thank you for your attention