1、Designation: C969M 17Standard Practice forInfiltration and Exfiltration Acceptance Testing of InstalledPrecast Concrete Pipe Sewer Lines (Metric)1This standard is issued under the fixed designation C969M; the number immediately following the designation indicates the year oforiginal adoption or, in
2、the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers procedures for testing installedprecast concrete pipe sewer lin
3、es using either water infiltrationor exfiltration acceptance limits to demonstrate the integrity ofthe installed materials and construction procedure.1.2 This practice is the SI companion of Practice C969.NOTE 1The owner shall specify the following: who will conduct,observe, and furnish labor, furni
4、sh material and measuring devices, andpay for the tests; who is responsible for determining local groundwaterconditions; and which test is to be conducted, that is, an infiltration test oran exfiltration test.NOTE 2The user of this practice is advised that test criteria presentedin this practice are
5、 similar to those in general use. Pipe, 600-mm diameteror larger, may be accepted by visual inspection when testing forinfiltration.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establ
6、ish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopmen
7、t of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C822 Terminology Relating to Concrete Pipe and RelatedProducts3. Terminology3.1 DefinitionsFor definitions of terms r
8、elating to concretepipe, see Terminology C822.4. Summary of Practice4.1 Determine the groundwater conditions surrounding thesection of sewer to be tested and select the type of test to beconducted.4.2 For the infiltration test, the amount of water leaking intothe sewer line is measured, and the rate
9、 of infiltration isdetermined. If the rate is less than or equal to the allowablelimit, the section of sewer tested is acceptable.4.3 For the exfiltration test, the sewer line is filled withwater to the specified test head and the rate of water loss isdetermined. If the rate is less than or equal to
10、 the allowablelimit, the section of sewer tested is acceptable.5. Significance and Use5.1 This is not a routine test. The values recorded areapplicable only to the sewer being tested and at the time oftesting.6. Preparation of the Sewer Line6.1 The sewer line shall be free of debris prior to testing
11、.6.2 The manholes, the ends of the branches, laterals, wyes,and stubs to be included in the test shall be plugged. All plugsshall be secured to prevent leakage blowout due to testingpressure.7. Procedure7.1 Infiltration Testing:7.1.1 Conduct testing from manhole to manhole or betweenmore than two ma
12、nholes. The length of main tested shall notexceed 213 m.7.1.2 Stop all dewatering operations and allow the ground-water to return to its normal level. Infiltration testing shall notbe used unless the groundwater level is at least 0.6 m above thecrown of the pipe for the entire length of the test sec
13、tion.7.1.3 Plug all pipe outlets discharging into the upstreammanhole.7.1.4 Measure the groundwater elevation and determine theaverage head over the test section.7.1.5 Measure infiltration leakage at the outlet of the testsection. Because leakage allowances are small, measurementsare best made by ei
14、ther timing the filling of a small container1This practice is under the jurisdiction of ASTM Committee C13 on ConcretePipe and is the direct responsibility of Subcommittee C13.09 on Methods of Test.Current edition approved April 15, 2017. Published May 2017. Originallyapproved in 1982. Last previous
15、 edition approved in 2009 as C969M 02(2009).DOI: 10.1520/C0969M-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM we
16、bsite.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of
17、 International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1of known volume, or by directing flow into a container for aspecified time and measuring the content, or by using smallweirs.7.1.6 If the measured rate of leakage
18、is less than or equal tothe allowable leakage in accordance with 8.1, the section ofsewer tested is acceptable.7.1.7 If the test section tails, it is not prohibited that it berepaired and retested in accordance with this practice.7.2 Exfiltration Testing:7.2.1 Conduct testing from manhole to manhole
19、 or betweenmore than two manholes. The length of main tested shall notexceed 213 m.7.2.2 Determine the groundwater elevation at both ends ofthe test section. If the groundwater level is less than 0.6 mabove the crown of the pipe measured from the highestelevation of the sewer, the exfiltration test
20、shall be used.7.2.3 Plug all pipe outlets discharging into the upstreammanhole and the test section outlet, and fill the sewer line withwater.7.2.4 At the upstream manhole, the test head shall beestablished as a minimum of 0.6 m above the crown of thepipe, or at least 0.6 m above existing groundwate
21、r, whicheveris higher.7.2.5 Allow the pipe to remain saturated for a period longenough to allow water absorption in the pipe, a minimum of 4h and up to a maximum of 72 h. After the absorption period,refill the pipe to the required test head.7.2.6 Measure the leakage loss over a timed test period. Th
22、eminimum test period shall be 15 min and the maximum shallnot exceed 24 h.7.2.7 If the measured rate of leakage is less than or equal tothe allowable leakage in accordance with 8.2, the section ofsewer tested is acceptable.7.2.8 If the test section fails, it is not prohibited that it berepaired and
23、retested in accordance with this practice. Thegroundwater elevation shall be redetermined prior to a secondtest and the test head adjusted, if necessary, in accordance with7.2.4.8. Leakage Criteria8.1 Infiltration Testing:8.1.1 For infiltration testing, the allowable leakage limitincluding manholes
24、is 18.5 L/(mm of internal diameter) (km ofsewer) (24 h) when the average head on the test section is 1.8m or less.NOTE 3The average head on the test section is the head above thecrown of the pipe at the upstream manhole plus the head above the crownof the pipe at the downstream manhole divided by tw
25、o.8.1.2 When the average groundwater head on the testsection is greater than 1.8 m, the allowable leakage shall beincreased in proportion to the ratio of the square root of theaverage groundwater head to the square root of the base headof 1.8 m.8.1.3 Manholes shall be tested separately and independe
26、ntlyor with the pipeline with the allowance of 4 L/(m of diameter)(m of head) (h). If building or house leads are connected to themain line being tested, allowance shall be made for permissibleleakage in such leads.8.2 Exfiltration Testing:8.2.1 For exfiltration testing, the allowable leakage limiti
27、ncluding manholes is 18.5 L/(mm of internal diameter) (km ofsewer) (24 h) when the average head on the test section is0.9 m or less.8.2.2 When the average head on the test section is greaterthan 1.8 m, the allowable leakage shall be multiplied by theratio of the square root of the average test head
28、and the squareroot of the base head of 1.8 m.8.2.3 Manholes may be tested separately and independentlyor with the pipeline with an allowance of 4 L/(m of diameter)(m of head) (h).9. Calculation9.1 Sample calculations are presented in the Appendix.10. Precision and Bias10.1 No justifiable statement s
29、hall be made either on preci-sion or on bias of these procedures since the test results merelystate whether there is conformance to the criteria for thesuccess specified. Due to the sealing effects of groundwater,internal flow in the sewerline, and test water, the test conditionsand results are not
30、reproducible.APPENDIX(Nonmandatory Information)X1. APPLICATION OF THE PRACTICEX1.1 The following examples have been prepared to dem-onstrate the technique of applying this practice:X1.1.1 Example 1: A sewer line is to be tested for infiltra-tion. The sewer line is a 300-mm diameter pipe with thegrou
31、ndwater head over the upstream manhole of 2.7 m and agroundwater head over the downstream manhole of 3.3 m. Thedistance between manholes is 120 m.X1.1.1.1 Find: The appropriate allowable rate of infiltrationleakage per hour of test.X1.1.1.2 Solution: The average test head in metres is:C969M 172Test
32、head 5 2.713.3!/2# 5 3 (X1.1)Since the test head is greater than the base head (1.8 m), theallowable rate of 18.5 L (mm diameter) (km) (24 h) must bemultiplied by the ratio of the square root of the averagegroundwater head (3 m) and the square root of the base head(1.8 m) or:Allowable leakage 5 18.5
33、 3 =3/=1.8 (X1.2)523.9 L/mm diameter!km!24 h! (X1.3)Conversion of this rate to the allowable leakage for theabove line in litres per hour gives: Allowable leakage:23.9300 diameter! 3120 m!24 h! 31000 m/km!5 35.8 (X1.4)X1.1.1.3 Answer: 35.8 L/h.X1.1.2 Example 2: A sewer line is to be tested for exfil
34、tra-tion as the groundwater level is below the crown of the pipe atthe upstream manhole. The sewer line is a 450-mm diameterpipe with a specified test head of 0.6 m over the crown of thepipe at the upstream manhole. The sewer line test section is120 m long between manholes on a slope of 1.0 %.X1.1.2
35、.1 Find: The appropriate allowable rate of exfiltrationleakage per hour of test.X1.1.2.2 Solution: The average test head in metres is:Test head 5120 30.110.6!10.625 1.2 (X1.5)Since the test head is greater than the base head (0.9 m), theallowable rate of 18.5 L/(mm diameter) (km) (24 h) ismultiplied
36、 by the ratio of the square root of the test head andthe square root of the base head (0.9 m) or:Allowable leakage 5 18.5=1.2/=0.9 (X1.6)521.4 L/mm diameter!km!24 h! (X1.7)Conversion of this rate to the allowable leakage for theabove line in litres per hour gives:Allowable leakage 5 21.4450 dia! 312
37、0 m!24 h! 31000 m/km!5 48.2(X1.8)X1.1.2.3 Answer: 48.2 L/h.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such pat
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