Skip to main content

Proposed Specifications for LRFD Soil-Nailing Design and Construction (2011) / Chapter Skim
Currently Skimming:

B: Proposed LRFD Construction Specificationsfor Soil Nail Walls
Pages 99-116

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 99...
... ....... B-5 1.2.4 Bearing Plates, Nuts, and Head-Stud Shear Connectors ..................................................................
Read the entire page →
From page 100...
... 1.10 VERIFICATION TESTING.........................................................................................................................B-10 1.10.1 Methods ..........................................................................................................................................B-10 1.10.2 Schedule .........................................................................................................................................B-10 1.11 PROOF TESTING........................................................................................................................................B-11 1.11.1 Methods ..........................................................................................................................................B-11 1.11.2 Schedule .........................................................................................................................................B-12 1.12 ACCEPTANCE CRITERIA OF TEST SOIL NAILS .................................................................................B-13 1.13 REJECTION OF TEST SOIL NAILS ..........................................................................................................B-13 1.13.1 Verification Test Soil Nails ............................................................................................................B-13 1.13.2 Proof Test Soil Nails.......................................................................................................................B-13 1.14 WALL DRAINAGE NETWORK ................................................................................................................B-14 1.14.1 Geocomposite Drain Strips.............................................................................................................B-14 1.14.2 Footing Drains ................................................................................................................................B-14 1.15 SHOTCRETE FACING................................................................................................................................B-14 1.15.1 Final Face Finish ............................................................................................................................B-14 1.15.2 Attachment of Nail Head Bearing Plate and Nut ............................................................................B-15 1.15.3 Shotcrete Facing Tolerances...........................................................................................................B-15 1.16 REINFORCING STEEL...............................................................................................................................B-15 1.17 STRUCTURAL CONCRETE ......................................................................................................................B-15 1.18 ARCHITECTURAL SURFACE FINISHES................................................................................................B-15 1.19 BACKFILLING BEHIND WALL FACING UPPER CANTILEVER ........................................................B-16 1.20 ACCEPTANCE ............................................................................................................................................B-16 2.0 MEASUREMENT AND PAYMENT ..........................................................................................................B-16 2.1 SOIL NAILS.................................................................................................................................................B-16 2.2 STRUCTURE EXCAVATION ....................................................................................................................B-17 2.3 WALL FACE................................................................................................................................................B-17 2.4 PAYMENT ...................................................................................................................................................B-17 2.4.1 Pay Items ........................................................................................................................................B-17 Section xx – Soil Nail Walls 3.0 CORROSION PROTECTION......................................................................................................................B-18 REFERENCES ........................................................................................................................................................B-18 B-2
Read the entire page →
From page 101...
... 1.2.2 Soil Nails 1.2.2.1 Solid Soil Nail Bar Solid nail bars shall meet the requirements of AASHTO M 31/ASTM A 615, Grade 420 or 520, or ASTM A 722 for Grade 1035. Soil nail bars shall be continuous without splices or welds, C1.2.2.1 Bars of A 722, Grade 1035, should not be used in conventional soil-nailing applications because the ma terial tends to be mo re brittle and mo re susceptible to stress corrosion Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY
Read the entire page →
From page 102...
... 1.2.3.4 Portland Cement Portland cement for grout and/or shotcrete shall me et the require ments of AASHTO M 85/ASTM C 150, Type I, II, III, or V Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-4
Read the entire page →
From page 103...
... 1.2.4 Bearing Plates, Nuts, and Head-Stud Shear Connectors 1.2.4.1 Bearing Plates Bearing plates shall meet the requirements of AASHTO M 183/ASTM A 36. C1.2.4.1 For no mi nal resistance of bearing plates refer to Article 5.10.9.7.2 of the AASHTO LRFD Bridge Design Specifications.
Read the entire page →
From page 104...
... The Contractor cannot substitute any of these individuals without written approval of the Owner or the Owner's Engineer. The Owner's Engineer shall approve or reject the Contractor Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-6
Read the entire page →
From page 105...
... Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY
Read the entire page →
From page 106...
... Shotcrete application may be delayed up to 24 hours if the contractor can demonstrate that the delay will not adversely affect the excavation face stability. Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-8
Read the entire page →
From page 107...
... Verification tests on sacrificial test nails shall be conducted at locations shown on the Plans. P roof tests on production nails shall be conducted at locations selected by the Owner's Engineer.
Read the entire page →
From page 108...
... 1.10.2 Schedule Verification tests shall be conducted by increm entally loading the verification test nails to failure or a ma ximu m test load of C1.10.2 Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-10
Read the entire page →
From page 109...
... 1.11 PROOF TESTING Successful proof testing shall be demonstrated on at least 5 percent of production soil nails in each nail row or a mini mu m of one per row. The Owner's Engineer shall determine the locations and num ber of proof tests prior to nail installation in each row.
Read the entire page →
From page 110...
... C1.11.2 The alignment load, AL , should be the mi ni mu m load required to align the testing apparatus and should not exceed 5 percent of the DL. Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-12
Read the entire page →
From page 111...
... Replacement test nails shall be installed and tested at no additional cost. 1.13.2 Proof Test Soil Nails For proof test nails, the Owner's Engineer ma y require the Contractor to replace so me or all of the installed production nails between a failed proof test soil nail and the adjacent passing proof test nail.
Read the entire page →
From page 112...
... 1.15.1 Final Face Finish Shotcrete finish shall be either an undisturbed gun finish as applied from the nozzle or a rod, broo m, wood float, rubber float, steel trowel, or rough screeded finish as shown on the Plans. Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-14
Read the entire page →
From page 113...
... applied that will duplicate the architectural surface finish shown on the Plans . Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY
Read the entire page →
From page 114...
... Failed verification test nails or additional verification test nails installed to verify alternative nail installation me thods proposed by the Contractor will not be measured. Section xx – Soil Nail Walls PROPOSED SPECIFICATIONS PROPOSED COMMENTARY B-16
Read the entire page →
From page 115...
... No me asure me nt or payment will be ma de for additional shotcrete or CIP concrete needed to fill voids created by irregularities in the cut face, excavation overbreak or inadvertent excavation beyond the Plan final wall face excavation line, or failure to construct the facing to the specified line and grade and tolerances. The final pay quantity shall include all structural shotcrete, admixtures, reinforcement, welded wire mesh, wire holding devices, wall drainage mate rials, bearing plates and nuts, test panels and all sa mp ling, testing and reporting required by the Plans and this Specification.
Read the entire page →
From page 116...
... C3 Corrosion protection shall be applied in accordance with the provisions of AASHTO LRFD Bridge Construction Specifications, Section 6, "Ground Anchors." A full discussion on corrosion of meta llic co mp onents and a me thodology that assists in selecting the appropriate level of corrosion protection of soil nail walls is presented in Lazarte et al.
Read the entire page →

Key Terms

  • soil nails
  • verification test
  • test nails
  • proof test
  • nail bar

  • test load
  • nail bars
  • specifications proposed
  • proposed specifications
  • verification tests

  • proposed commentary
  • bearing plates
  • test soil
  • proof tests
  • lrfd bridge

  • test nail
  • nail head
  • aashto lrfd
  • permanent soil
  • nail installation

  • architectural surface
  • shotcrete facing
  • nail testing
  • nail walls
  • bearing plate

  • bridge construction
  • pullout resistance
  • loading schedule
  • surface finishes
  • creep test


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.