ARMY UFGS-31 63 16-2008 AUGER CAST GROUT PILES《浇注灌浆螺旋桩》.pdf

1、*USACE / NAVFAC / AFCESA / NASA UFGS-31 63 16 (November 2008)-Preparing Activity: USACE SupersedingUFGS-31 63 16 (October 2007)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2008*SECTION TABLE OF CONTENTSDIVISION 31 - EARTHWORKSECTION 31 63 16AUGER CAST GR

2、OUT PILES11/08PART 1 GENERAL1.1 MEASUREMENT AND PAYMENT PROCEDURES1.1.1 Lump Sum1.1.1.1 Variations in Pile Quantities1.1.1.2 Variations in Pile Load Test Quantities1.1.1.3 Variations in Auger Withdrawal Quantities1.1.1.4 Lump Sum Basis of Payment1.1.2 Unit Prices1.1.2.1 Piles1.1.2.2 Unit Price Basis

3、 of Payment1.1.2.3 Full Compensation1.1.2.4 Load Tests1.2 REFERENCES1.3 SYSTEM DESCRIPTION1.3.1 Equipment1.3.2 Subsurface Data1.3.3 Grout Pump1.4 SUBMITTALSPART 2 PRODUCTS2.1 MATERIALS2.1.1 Grout2.1.1.1 Portland Cement2.1.1.2 Pozzolan2.1.1.3 Grout Fluidifier2.1.1.4 Water2.1.1.5 Fine Aggregate2.1.1.6

4、 Aggregate2.1.2 Reinforcement2.1.3 CasingsPART 3 EXECUTION3.1 GROUT VOLUMESECTION 31 63 16 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2 INSTALLATI0N3.2.1 Casings Placement3.2.2 Drilling3.2.3 Grouting and Auger Removal3.2.4 Pile Butts3.2.

5、5 Placement Tolerances3.2.6 Cutoff3.2.7 Disposal of Excavated Material3.3 FLOW CONE TEST3.4 GROUT SPECIMENS FOR LABORATORY TESTS3.5 GROUT SPECIMENS FOR CONTRACTOR TESTS3.6 TEST PILES3.6.1 Placement3.6.2 Depth3.6.3 Loading Test3.6.4 Acceptance3.6.5 Tolerances3.7 SOIL PROFILE3.8 PROTECTION OF PILES3.9

6、 SPECIAL INSPECTION AND TESTING FOR SEISMIC-RESISTING SYSTEMS3.10 RECORDS- End of Section Table of Contents -SECTION 31 63 16 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-31 63 16 (November 2008)-Preparin

7、g Activity: USACE SupersedingUFGS-31 63 16 (October 2007)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2008*SECTION 31 63 16AUGER CAST GROUT PILES11/08*NOTE: This guide specification covers the requirements for auger cast grout piles.Edit this guide speci

8、fication for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments and suggestions on

9、this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of 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 Req

10、uest (CCR).*PART 1 GENERAL*NOTE: Auger cast grout piles are not recommended in low strength soils such as peat or soils containing layers or fields of boulders or cobbles.On the drawings, show:1. Subsurface-soil-data logs2. Locations and size (diameter) of piles.3. Design tip elevation for each pile

11、 indicated.4. Reinforcing steel details.5. Locations of test piles if required.SECTION 31 63 16 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6. Locations of soil probes if required.*1.1 MEASUREMENT AND PAYMENT PROCEDURES*NOTE: Where the basi

12、s for bidding is based on lump sum price, use the following paragraphs. If the bid is based on unit price, use paragraph UNIT PRICES.*1.1.1 Lump Sum*NOTE: The pile diameter specified should be the diameter of the auger (50 mm (2 inches) larger in diameter than that used to calculate the structural c

13、apacity of the pile. The structural capacity of the pile should be based on an allowable design stress not greater than 20 percent of the 28-day grout strength.The number of augering test piles would depend on degree of variations in subsoil conditions as revealed by test borings. In general, a mini

14、mum of three augering tests should be made and possibly more where subsurface conditions are questionable. One test pile should be load tested in each area of substantially different subsoil conditions, but not less than one pile load test should be made for the project.The total test load would be

15、twice the working load on the pile, which should not exceed 36 metric tons (40 tons) per pile. Withdrawal of auger and examination of the soil to verify the soil profile should be required for all test piles and for 10 percent of the remaining piles to supplement the soil boring information.*The con

16、tract price for piling will be a principal sum based on _ mm inch diameter piles, (including _ test piles), having a total aggregate length of _ linear m feet and will include _ pile load tests having a capacity of _ metric ton ton and _ auger withdrawals.1.1.1.1 Variations in Pile QuantitiesFrom th

17、e results of laboratory tests on soil samples and data obtained as a result of placing and loading the test piles specified herein, the Contracting Officer will determine and will list “calculated“ pile tip elevations for all piles. The Contracting Officer reserves the right to increase or decrease

18、the total length of piles to be furnished and installed by changing the pile locations or elevations, requiring the installation of additional piles, or directing the omission of piles from the requirements shown and specified. Should the total pile length installed vary from that specified as the b

19、asis for bidding because of SECTION 31 63 16 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-added or omitted piles or variations in the pile lengths, the principal sum will be adjusted by the amount bid per linear m foot for “Additional Pile L

20、ength“ or “Omitted Pile Length“.1.1.1.2 Variations in Pile Load Test QuantitiesThe Contracting Officer reserves the right to increase or decrease the number of pile load tests from that specified for the basis of bidding. For changes in the number of load tests required, the contract principal sum p

21、rice will be adjusted by the amount bid for “Each Additional Pile Load Test“ or “Each Omitted Pile Load Test.“1.1.1.3 Variations in Auger Withdrawal QuantitiesShould the number of auger withdrawals be increased above the specified contract number at the direction of the Contracting Officer, the cont

22、ract principal sum will be adjusted by the amount bid for “Each Additional Auger Withdrawal.“1.1.1.4 Lump Sum Basis of PaymentThe Contractors furnished price shall include all necessary equipment, tools, material, labor, and supervision required for installing and cutting off the piles (including te

23、st piles), for conducting the load tests and for auger withdrawals in order to meet the applicable contract requirements. Payment for piles will be on the basis of the lengths of the piles measured from cut-off elevations to final tip elevations. No additional payment will be made for withdrawn, dam

24、aged, or rejected piles, for any portion of a pile remaining above the cut-off elevation, for cutting off piles, nor for any cut off lengths of piles. Payment for load tests will be made for each load test satisfactorily performed. Payment for auger withdrawal will be made for each auger withdrawal

25、made at the direction of the Contracting Officer.1.1.2 Unit Prices1.1.2.1 PilesThe lump sum contract price does not include foundation piles, test piles, or the placement thereof; payment for which will be made in accordance with these paragraphs.1.1.2.2 Unit Price Basis of PaymentThe Contracting Of

26、ficer reserves the right to increase or decrease the length of piles to be furnished and installed by changing the foundation pile locations or elevations, by requiring the installation of additional piles, or by requiring omission of piles from the requirements shown and specified. Whether or not s

27、uch changes are made, the Contractor will be paid at the contract unit price per linear m foot (including control test piles), multiplied by the total linear m feet of acceptable piles actually installed; provided however, that in the event the Contracting Officer requires an increase or decrease in

28、 the total length of piles furnished and installed, the contract unit price will be adjusted in accordance with SPECIAL CONTRACT REQUIREMENTS.1.1.2.3 Full CompensationPayment in accordance with paragraph Unit Price Basis of Payment will SECTION 31 63 16 Page 5Provided by IHSNot for ResaleNo reproduc

29、tion or networking permitted without license from IHS-,-,-constitute full compensation for furnishing, delivering, handling, and/or installing (as applicable) all material, labor and equipment necessary to meet contract requirements applicable to the foundation piles. The Contractor will not be allo

30、wed payment for withdrawn, broken, or rejected piles nor (except for control test piles) for a portion of any pile remaining above the cut-off point.1.1.2.4 Load TestsThe contract includes _ pile load tests. The Contracting Officer reserves the right to increase or decrease the number of pile tests.

31、 Adjustments in the contract price will be made for such increases or decreases in the amounts bid for “Each Additional Pile Load Test“ or “Each Omitted Pile Load Test.“1.2 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications

32、 are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Artic

33、le. Also use the Reference Wizards Check Reference feature to update the issue dates.References not used in the text will automatically be 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

34、 part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.ASTM INTERNATIONAL (ASTM)ASTM C 109/C 109M (2007e1) Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or (50-mm) Cube Specimens)AS

35、TM C 150 (2007) Standard Specification for Portland CementASTM C 31/C 31M (2008a) Standard Practice for Making and Curing Concrete Test Specimens in the FieldASTM C 33 (2007) Standard Specification for Concrete AggregatesASTM C 39/C 39M (2005e1) Standard Test Method for SECTION 31 63 16 Page 6Provid

36、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Compressive Strength of Cylindrical Concrete SpecimensASTM C 618 (2008) Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in ConcreteASTM C 937 (2002) Grout Fluidifier for P

37、replaced-Aggregate ConcreteASTM C 939 (2002) Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method)ASTM C 942 (1999; R 2004) Compressive Strength of Grouts for Preplaced-Aggregate Concrete in the LaboratoryASTM D 1143/D 1143M (2007) Piles Under Static Axial Compressive Load1.3 SYSTEM DESC

38、RIPTION*NOTE: Working load on the pile should be limited to 36 metric tons (40 tons) per pile. Assuming subsurface conditions are adequate, the working load on the pile should be limited to about 36 metric tons (40 tons) per pile for 300 mm (12 inch) piles up to about 73 metric tons (80 tons) per pi

39、le for 450 mm (18 inch) piles.*Auger cast grout piles are formed by the rotation of a continuous flight hollow-shaft auger into the ground to the tip elevation established by the requirements specified elsewhere in this section. Grout is then injected through the auger shaft as the auger is being wi

40、thdrawn in such a way as to exert removing pressure on the withdrawing earth-filled auger as well as lateral pressure on the soil surrounding the grout-filled pile hole.1.3.1 EquipmentThe minimum inside diameter of the hollow shaft of the augerflight shall be 31.8 mm 1-1/4 inches. Provide grout inje

41、ction equipment with a grout pressure gauge in clear view of the equipment operator. Rate of grout injection and rate of auger withdrawal from the soil shall be so coordinated as to maintain at all times a positive pressure on this gauge which will, in turn, indicate the existence of a “removing pre

42、ssure“ on the bottom of the augerflight. Magnitude of this pressure and performance of other augering and grouting procedures, such as rate of augering, rate of grout injection, and control of grout return around the augerflight, are dependent on soil conditions and equipment capability and shall be

43、 at the option of the Contractor, subject to review by the Contracting Officer. The auger hoisting equipment shall be capable of withdrawing the auger smoothly and at a constant rate.1.3.2 Subsurface Data*SECTION 31 63 16 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted wit

44、hout license from IHS-,-,-NOTE: This paragraph is to be used by agencies that show the soil data log on the drawings and for agencies that retain subsurface samples of soil.*Subsurface soil data logs are shown on the drawings. The subsoil investigation report and samples of material taken from subsurface investigations may be examined in the _.1.3.3 Grout PumpProvide a