1、*USACE / NAVFAC / AFCESA / NASA UFGS-02 56 14 (February 2010)-Preparing Activity: USACE SupersedingUFGS-02 56 14 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2010*SECTION TABLE OF CONTENTSDIVISION 02 - EXISTING CONDITIONSSECTION 02 56 14CLAY BA
2、RRIER LAYER02/10PART 1 GENERAL1.1 UNIT PRICES1.2 REFERENCES1.3 SUBMITTAL REQUIREMENTS1.4 SUBMITTALSPART 2 PRODUCTS2.1 CLAY2.2 EQUIPMENT2.2.1 Compaction Equipment2.2.2 Scarification Equipment2.2.3 Steel Wheeled Rollers2.2.4 Hand Operated TampersPART 3 EXECUTION3.1 BORROW SOURCE ASSESSMENT3.1.1 Classi
3、fication Testing3.1.2 Compaction Testing3.1.3 Hydraulic Conductivity Testing3.1.4 Acceptable Zone Development3.1.5 Chemical Contamination Testing3.1.6 Commercial Testing Laboratory3.2 INSTALLATION3.2.1 Clay Placement3.2.2 Moisture Control3.2.3 Compaction3.2.4 Scarification3.2.5 Repair of Voids3.3 CO
4、NSTRUCTION TOLERANCES3.4 CONSTRUCTION TESTS3.4.1 Clay Material Tests3.4.2 Moisture Content and Density Tests of Clay3.4.2.1 Rapid TestsSECTION 02 56 14 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.4.2.2 Nuclear Density and Moisture Content
5、 Tests3.4.2.3 Test Results3.4.3 Hydraulic Conductivity Tests of Clay3.4.4 Quality Assurance Samples3.5 PROTECTION3.5.1 Moisture Content3.5.2 Erosion3.5.3 Freezing and Desiccation3.5.4 Retests- End of Section Table of Contents -SECTION 02 56 14 Page 2Provided by IHSNot for ResaleNo reproduction or ne
6、tworking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-02 56 14 (February 2010)-Preparing Activity: USACE SupersedingUFGS-02 56 14 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2010*SECTION 02 56 14CLAY BARRIER LAYE
7、R02/10*NOTE: This guide specification covers the requirements for construction of a clay barrier layer to isolate contaminated material from the environment.Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable i
8、tems(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of
9、technical proponents, including their organization designation and telephone number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL1.1 UNIT PRICES*NOTE: Delete this paragraph when work is covered by a lump-sum contract price. W
10、eight measurement may be used to supplement volume measurement surveys if significant subgrade settlement (landfill cover applications) is anticipated.*Measurement and payment for the clay barrier layer shall be based on the unit price schedule for each cubic m cubic yard of clay in place. This unit
11、 price shall include the cost for development of the clay borrow source, cost of clay, excavation, hauling, equipment, placement, testing, SECTION 02 56 14 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-and other incidental work required to co
12、nstruct the clay barrier layer.1.2 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.Use the
13、Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update the issue dates.References not used in the text will automatically be
14、 deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.ASTM
15、INTERNATIONAL (ASTM)ASTM D 1140 (2000; R 2006) Amount of Material in Soils Finer than the No. 200 (75-micrometer) SieveASTM D 1556 (2007) Density and Unit Weight of Soil in Place by the Sand-Cone MethodASTM D 1557 (2009) Standard Test Methods for Laboratory Compaction Characteristics of Soil Using M
16、odified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)ASTM D 1587 (2008) Thin-Walled Tube Sampling of Soils for Geotechnical PurposesASTM D 2167 (2008) Density and Unit Weight of Soil in Place by the Rubber Balloon MethodASTM D 2216 (2005) Laboratory Determination of Water (Moisture) Content of Soil and
17、Rock by MassASTM D 2488 (2009a) Description and Identification of Soils (Visual-Manual Procedure)ASTM D 3740 (2008) Minimum Requirements for Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and ConstructionSECTION 02 56 14 Page 4Provided by IHSNot for
18、ResaleNo reproduction or networking permitted without license from IHS-,-,-ASTM D 422 (1963; R 2007) Particle-Size Analysis of SoilsASTM D 4220 (1995; R 2007) Preserving and Transporting Soil SamplesASTM D 4318 (2005) Liquid Limit, Plastic Limit, and Plasticity Index of SoilsASTM D 5084 (2003) Measu
19、rement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall PermeameterASTM D 6938 (2008a) Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)ASTM D 698 (2007e1) Laboratory Compaction Characteristics of So
20、il Using Standard Effort (12,400 ft-lbf/cu. ft. (600 kN-m/cu. m.)1.3 SUBMITTAL REQUIREMENTSSubmit Materials Handling Plan describing the following: processing and placement of the clay; type, model number, weight and critical dimensions of equipment to be used for soil processing, compaction, scarif
21、ication, and smooth rolling; method of protecting clay from changes in moisture content and freezing after placement. The following shall also be submitted:a. Borrow Source Assessment Report at least 15 _ days prior to clay placement. No clay shall be placed until the Borrow Source Assessment Report
22、 is approved. The report shall include the following: location of each borrow source; plan view and estimated available quantity of clay; locations and logs of subsurface explorations; laboratory test results; moisture-density curves showing the “Acceptable Zone“ of moisture contents and densities w
23、hich achieve the required hydraulic conductivity for each principal type of material or combination of materials.b. A minimum of 46 kg 100 pounds of each principal type of material or combination of materials to the Governments designated laboratory at least 30 _ days prior to placement.c. Name and
24、qualifications of the proposed commercial testing laboratory.1.4 SUBMITTALS*NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum requi
25、red for adequate quality control.A “G” following a submittal item indicates that the SECTION 02 56 14 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-submittal requires Government approval. Some submittals are already marked with a “G”. Only de
26、lete an existing “G” if the submittal item is not complex and can be reviewed through the Contractors Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.For submittals requiring Government approval on Army projects, a code of up to
27、three characters within the submittal tags may be used following the “G“ designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (Engineering Division or other organization in the D
28、istrict Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes following the “G“ typically are not used for Navy, Air Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army proj
29、ects.*Government approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control approval. information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Gove
30、rnment. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-03 Product DataProtectionEquipmentCommercial Testing LaboratorySD-04 SamplesClayQuality Assurance SamplesSD-06 Test ReportsBorrow Source Assessment; G; G, _Assessment Tests; G; G, _Moisture Content and Density T
31、ests of Clay; G; G, _Hydraulic Conductivity Tests of Clay; G; G, _PART 2 PRODUCTS2.1 CLAY*NOTE: The physical criteria listed in Table 1 are minimum requirements. More restrictive criteria may be appropriate depending on local soils. For SECTION 02 56 14 Page 6Provided by IHSNot for ResaleNo reproduc
32、tion or networking permitted without license from IHS-,-,-composite geomembrane/clay covers and liners, the maximum particle size should be reduced to 12.5 mm (0.5 inches) in the upper lift of clay layer to prevent puncturing of the geomembrane.Bentonite is often added to soils that do not contain e
33、nough clay to achieve the desired hydraulic conductivity. Refer to EPA/600/R-93/182 - Quality Assurance and Quality Control for Waste Containment Facilities if bentonite will be used as an additive to the available soils.*Clay shall be free of roots, debris, organic or frozen material, and shall hav
34、e a maximum clod size of 50 mm 2 inches at the time of compaction. Clay material shall comply with the criteria listed in Table 1.TABLE 1REQUIRED PHYSICAL PROPERTIES OF CLAYTest TestProperty Value Method_ _ _Max. particle size (mm) 25 ASTM D 422Min. percent passing 4.75 mm sieve 80 ASTM D 422Min. pe
35、rcent passing 0.075 mm sieve 50 ASTM D 1140Min. liquid limit 35 ASTM D 4318Min. plasticity index 10 ASTM D 4318Max. plasticity index 40 ASTM D 4318TABLE 1REQUIRED PHYSICAL PROPERTIES OF CLAYTest TestProperty Value Method_ _ _Max. particle size (inches) 1 ASTM D 422Min. percent passing No. 4 sieve 80
36、 ASTM D 422Min. percent passing No. 200 sieve 50 ASTM D 1140Min. liquid limit 35 ASTM D 4318Min. plasticity index 10 ASTM D 4318Max. plasticity index 40 ASTM D 43182.2 EQUIPMENT*NOTE: A soil stabilizer or road regrader is often specified for use on soils that have clods or particles which are diffic
37、ult to reduce to an acceptable size.*Equipment used to place the clay barrier layer shall not brake suddenly, turn sharply, or be operated at speeds exceeding 8 km 5.0 miles per hour.SECTION 02 56 14 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
38、,-,-2.2.1 Compaction EquipmentCompaction equipment shall consist of tamping foot rollers which have a minimum weight of 18,140 kg 40,000 pounds. At least one tamping foot shall be provided for each 71,000 square mm 110 square inches of drum surface. The length of each tamping foot, from the outside
39、surface of the drum, shall be equal to or greater than the loose lift thickness. During compaction operations, the spaces between the tamping feet shall be maintained clear of materials which would impair the effectiveness of the tamping foot rollers.2.2.2 Scarification Equipment*NOTE: Tamping foot
40、rollers create a roughened surface on each lift of clay. The designer must determine if scarification is required to further roughen the surface of the clay layer prior to placement of additional lifts of clay. If additional scarification is not required, omit this paragraph and other references to
41、scarification throughout this section.*Disks, rotor tillers, or other approved means shall be provided to scarify the surface of each lift of clay prior to placement of the next lift. The scarification equipment shall be capable of uniformly disturbing the upper 25 mm 1 inch of the clay surface to p
42、rovide good bonding between lifts.2.2.3 Steel Wheeled Rollers*NOTE: The upper surface of the clay layer must be smooth rolled if a geosynthetic will be placed on top of the clay layer. Remove this paragraph and all other references to smooth rolling if a geosynthetic will not be placed on top of the
43、 clay layer.*A smooth, non-vibratory steel wheeled roller shall be used to produce a smooth compacted surface on the clay barrier layer. Steel wheeled rollers shall weigh a minimum of 9,070 kg 20,000 pounds.2.2.4 Hand Operated TampersHand operated tampers shall consist of rammers or other impact type equipment. V
