Chemical Grouting of Chemical Grouting of Sanitary Sewers Sanitary Sewers Illinois Section CSWEA Illinois Section CSWEA Collection System Seminar Collection System Seminar June 11, 2009 June 11, 2009 Derek J. Wold, P.E. Derek J. Wold, P.E. Baxter & Woodman, Inc. Baxter & Woodman, Inc.
Chemical Grouting of Sanitary Sewers. Illinois Section CSWEA Collection System Seminar June 11, 2009 Derek J. Wold, P.E. Baxter & Woodman, Inc. Chemical Grouting of Sanitary Sewers Introduction. Rehabilitation Alternatives Why use Chemical Grout Chemical Grout Overview Specifications - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Chemical Grouting of Sanitary Chemical Grouting of Sanitary SewersSewers
Illinois Section CSWEAIllinois Section CSWEACollection System Seminar Collection System Seminar
June 11, 2009June 11, 2009
Derek J. Wold, P.E. Derek J. Wold, P.E. Baxter & Woodman, Inc.Baxter & Woodman, Inc.
Chemical Grouting of Sanitary Sewers Introduction
• Rehabilitation Alternatives– Why use Chemical Grout
• Chemical Grout Overview
• Specifications
• Costs
• Case Studies
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers IntroductionSewers Introduction
Purpose of RehabilitationPurpose of Rehabilitation Structural RepairStructural Repair Infiltration / Inflow (I/I) RemovalInfiltration / Inflow (I/I) Removal Extend Service LifeExtend Service Life
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers IntroductionSewers Introduction
Slip Lining)Slip Lining) Pipe BurstingPipe Bursting Open Cut Open Cut
ReplacementReplacement Chemical Chemical
GroutingGrouting
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers OverviewSewers Overview
Why utilize chemical groutWhy utilize chemical grout Less expensive than other rehabilitation Less expensive than other rehabilitation
methodsmethods Extends service lifeExtends service life Remove I/IRemove I/I
When to use chemical groutWhen to use chemical grout No structural defectsNo structural defects Joint leaks or root intrusionJoint leaks or root intrusion No sagsNo sags
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Mainline Sewer GroutingSewers Mainline Sewer Grouting
Equipment Equipment PackerPacker TV CameraTV Camera GaugesGauges WinchWinch
Types of groutTypes of grout
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
Service Connection and Lateral Service Connection and Lateral GroutingGrouting
Equipment usedEquipment used AccessAccess
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
SpecificationsSpecifications StandardsStandards
Rehabilitation of Sewers ASTM 2304.Rehabilitation of Sewers ASTM 2304. Sealing Sewer Manholes ASTM 2414.Sealing Sewer Manholes ASTM 2414.
SpecificationsSpecifications Preparatory Cleaning and TelevisingPreparatory Cleaning and Televising Grout MaterialGrout Material Joint TestingJoint Testing
3 psi greater than groundwater pressure, or3 psi greater than groundwater pressure, or ½ psi per foot½ psi per foot Maximum of 10 psiMaximum of 10 psi Maximum pressure loss = 1 psi per 15 sec.Maximum pressure loss = 1 psi per 15 sec.
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
• Special unit of local government• Responsible for wastewater collection and treatment• Operates 237 miles of public sewers• Operates 9 pumping stations• Operates one WWTF rated at 11 MGD• 20 square mile service area• Western suburbs of Chicago, Illinois• 21,062 building connections• Serves approximately 62,000 people
mapmap
Downers Grove Sanitary District35 miles west of Chicago
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
Select Target Rehabilitation BasinSelect Target Rehabilitation Basin Develop Criteria / Scoring System based on:Develop Criteria / Scoring System based on:
Frequency of SSOsFrequency of SSOs Frequency of Basement BackupsFrequency of Basement Backups Flow Monitoring DataFlow Monitoring Data System AgeSystem Age
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
Target I/I Rehabilitation BasinTarget I/I Rehabilitation Basin Select I-H-9 Flow Basin as Select I-H-9 Flow Basin as
first target basinfirst target basin 188 Building connections188 Building connections Approx. 8,300 LF of Approx. 8,300 LF of
sewer and 32 manholessewer and 32 manholes Flow Data Flow Data
60 gpm ADF to 1,200 60 gpm ADF to 1,200 gpm peak flowgpm peak flow
Preliminary SSES work and Preliminary SSES work and resultsresults Flood testingFlood testing Smoke testingSmoke testing Small amount of I/I Small amount of I/I
Line 100% of mains - $418,000Line 100% of mains - $418,000 Grout or Replace 100% Manholes - $47,000Grout or Replace 100% Manholes - $47,000 Line or replace 96% Services - $1,013,000Line or replace 96% Services - $1,013,000
ResultsResults I/I reduced by 60-80 percentI/I reduced by 60-80 percent No overflows in I-H-9 flow basinNo overflows in I-H-9 flow basin Unable to produce air tight systemUnable to produce air tight system Impact of I/I Removal on inadequate Impact of I/I Removal on inadequate
storm drainagestorm drainage
Downers Grove Sanitary DistrictFlow Meter Data Summary - 1-H-9 Flow Basin
I/I Comparison2.
852.
781.
033.
145.
396.
175.
111.
871.
033.
544.
861.
384.
804.
162.
171.
170.
902.
860.
811.
490.
841.
343.
153.
890.
625.
191.
200.
954.
944.
681.
097.
315.
443.
56
1.45
1.42
2.86
2.17
4.05
3.14
2.21
3.02
0.97
0.69
4.01
1.15
3.02
2.42
3.92
0.31 0.39 0.
530.
25 0.37
1.19
3.84 4.
111.
432.
182.
581.
300.
950.
82
0.42
0.38
2.10
3.00
1.10
0.70
3.20
3.70
2.20
0.30
4.20 4.
401.
400.
942.
382.
101.
700.
801.
302.
300.
260.
900.
373.
203.
631.
161.
991.
442.
050.
651.
061.
892.
191.
82
1.34
2.31
2.22
2.56
2.61
1.88
1.90
1.77
1.81
1.47
1.47
2.71
0
1
2
3
4
5
6
7
8
3/8/
1998
3/31
/199
8
4/20
/199
8
2/24
/200
1
4/15
/200
1
6/5/
2001
8/25
/200
1
9/23
/200
1
4/8/
2002
5/11
/200
2
7/9/
2002
8/22
/200
2
3/28
/200
3
5/5/
2003
7/15
/200
3
9/1/
2003
11/4
/200
3
5/30
/200
4
8/3/
2004
11/2
7/20
04
1/13
/200
5
5/13
/200
5
9/24
/200
5
1/13
/200
6
4/30
/200
6
6/26
/200
6
8/28
/200
6
9/13
/200
6
10/3
/200
6
11/1
0/20
06
7/18
/200
7
8/19
/200
7
10/1
/200
7
12/1
1/20
07
5/2/
2008
5/26
/200
8
6/13
/200
8
Rainfall Event
I/I N
um
ber
Completion of Main Sewer Lining
Start of Service Sewer Lining
Pre-Lining Post-LiningPre-Lining
Main Average
Post-Lining Service Average
Completion of Service Sewer Lining
Post-Lining Main Average
Pre-Lining Post-Lining
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict