UNITRACC - Underground Infrastructure Training and Competence Center

Cured-in-place lining process - material components

Jun 16, 2004

Lining with cured-in-place pipes - procedure

Procedure

Jun 17, 2004

Lining with cured-in-place pipes - preparatory work

Preparatory works

Jun 21, 2004

Old sewer

Old sewer

Putting out of operation (securing of drainage capability)
Cleaning
Optical inspection
Removal of roots, deposits and other drainage obstacles
Probable sealing of groundwater infiltrations
Measurement and calibration of the section that is to be rehabilitated
Probable creation of an excavation for installation (dependent on nominal size)

(Image: Cleaning)

(Image: Inspection)

(Image: Damages)

Jun 29, 2004

Procedure of lining with cured-in-place pipes

Procedure

Jun 29, 2004

Preliner

Before inserting the liner, a thin PE foil hose, also called Preliner hose or Preliner is installed in most European countries as a basic measure .

(Image: Installation of the Preliner)

(Video: Insituform process: Inversion of the preliner [FI-Insit])

The object of this is to prevent, among others the

Ingress of un-hardened resins in soil and groundwater;
Uncontrolled ingress of so-called "excess" resin into connection regions where it could lead …

Jun 29, 2004

Installation variants of the soaked hose

Eversion (Inversion)

(Image: Insertion of the liner hose by means as an example with the Insituform process)

Everted-in-place insertion:
Method whereby the impregnated liner is introduced by eversion to achieve simultaneous insertion and inflation [DINEN13566-4:2003].

Pulling-in process

(Image: KM-Inliner process with reference to [FI-KMG] - Sketch of principle of pulling-in the liner [Image: S&P GmbH])

Winched-in-place insertion:
Method whereby the …

Nov 25, 2004

Curing of the soaked hose - definition


EN 13566-1 / DWA-M 143-3 Curing: Process of resin polymerisation, which may be initiated or accelerated by the use of heat or exposure to light [DINEN13566-4:2003].

(Image: Controlling and documenting the supply and return temperatures)	(Image: Light source)	Polymerization: Mounting of molecules by chemical bonds into a new substance.

Nov 25, 2004

Curing variants

The hardening of the soaked hose can be carried out depending on the cured-in-place liner system:

in environmental temperature (cold hardening),
by adding heat (thermal hardening) or
by UV-light (light hardening).

(Image: KM-Inliner process with reference to [FI-KMG] - Thermical hardening)

(Image: Inpipe process with reference to [FI-Teerb] - Light hardening with UV heating lamps [Image: S&P GmbH])

Dec 09, 2004

Finishing work

(Image: Sequence diagram in the renovation of sewers by means of site manufactured and hardened linings - cured-in-place process - finishing work)

Dec 09, 2004

Finishing work

(Image: Connecting the liner into the entry manhole with reference to [FI-Insit] - View of the manhole connection [Image: S&P GmbH])

(Image: Lateral connection by means of a top hat sleeve)

Manhole connections
Fitting of the cured-in-place liner to the manhole channel
Reconstruction of the inclusion of the laterals

Jan 14, 2005

Integration of laterals

Open cut method:

The integration of laterals to the cured-in-place lined sewer is carried out via small excavations. For that purpose the integration points in the sewer have to be measured accurately in advance.

(Image: Sewer opening by means of core drilling in the open cut method)

Trenchless method

The connection region is relatively easy to recognise from inside. In this region the liner bulges outwards somewhat so that boring, cutting and milling …

Jan 25, 2005

Integration of laterals: Trenchless method of construction

(Image: Recreation of the branch connection [FI-Insit] - Packer and top hat sleeve)	(Image: Recreation of the branch connection [FI-Insit] - Packer with inverted top hat sleeve before installation)
(Image: Recreation of the branch connection - Description of the process with reference to [FI-Insit] [Image: S&P GmbH])	(Image: Recreation of the branch connection - Description of the process with reference to [FI-Insit] [Image: S&P GmbH])

Feb 07, 2005

Testing and checks

Check and documentation of the cleaning, inspection, measurement and calibration of the sewer section that is to be rehabilitated.
Reception control of the hose.
Protocol of the transportation- and storage temperature (dependent on procedure).
Recording of the tensile force during the pulling-in of the preliner- and liner hose.
The hardening procedure is to be observed from a metrological point of view and is to be documented in a protocol.
Taking …

Sep 20, 2005

Personnel requirements and equipment

Construction site personnel 3-5 people
Cooling box or light-proof box or soaking facility depending on the type of liner
Heating aggregate, steam generator or light source
Pulling-in- or eversion system (frame or drum)
possibly lifting device

(Image: Equipment for lining with cured-in-place pipes)

Jun 06, 2006

Cured-in-place lining process - execution

Oct 12, 2005

Cured-in-place lining process - evaluation

Advantages

(Image: Pros and cons)

Short period of construction
Installation above the manhole construction
Independency from material and shape of the cross section
Applicable in non-accessible and accessible area
Adjustable to different chemical demands
Bends and angular deflections can be rehabilitated
Inclusion of side inlets possible in the trenchless method of construction
Small reduction of the cross section
No pipe joints
Improvement of the structural …

Oct 12, 2005

Cured-in-place lining process - evaluation

Disadvantages

(Image: Pros and cons)

It is necessary to take the sewer out of operation
Development of folds in the case of severe alterations of dimension and angular deflections
Inner outline of the cured-in-place liner is determined by the surface structure of the old pipe
Ovalties of the old pipe reduce the structural load bearing capacity
Unprofessional soaking can lead to leaks
Handling of liquid resin on the construction site

Jun 06, 2006

Cured-in-place lining process - evaluation

Jun 08, 2006

(Image: Pulling-in the stud hose)

Jun 08, 2006

In the grouted-in-place lining process, one or several HD-PE-hoses prefabricated with regard to their length and cross section are pulled into the sewer section to be rehabilitated by means of a cable winch and pressed against the inner wall under pressure.

(Image: Attention!)

Purpose of studs: Spacers to keep the distance from the pipeline to be rehabilitated or from the pre-installed HD-PE-hose.

(Image: Working steps in the grouted-in-place lining …

Jun 09, 2006

Grouted-in-place lining process - system variants

(Image: Grouted-in-place process - System variation of the TROLINING® process - Basic system with reference to [FI-Troli] [Image: S&P GmbH])	(Image: Grouted-in-place process - System variation of the TROLINING® process - Preliner system with reference to [FI-Troli] [Image: S&P GmbH])
(Image: Grouted-in-place process - System variation of the TROLINING® process - Controll system with reference to [FI-Troli] [Image: S&P GmbH])	(Image: Grouted-in-…

Jun 09, 2006

Grouted-in-place lining process - procedure

(Image: Sequence of the renovation of sewers by means of lining with site manufactured and hardened pipes - Grouted-in-place lining process)

Jun 06, 2006

Grouted-in-place lining process

Jan 31, 2023