HomeMy WebLinkAboutFile Documents.546 McSkimming Rd.0190.2019 (4).ARBKResidence546 McSkimming RoadAspen, ColoradoTemporary Micropile Wall*for Excavation ShoringGrade-1. Temporary Micropile Wall - CoverGrade-2. Temporary Micropile Wall - LocationGrade-3. Temporary Micropile Wall - ProfileGrade-4. Temporary Micropile Wall - General NotesGrade-5. Temporary Micropile Wall - SectionsGrade-6. Temporary Micropile Wall - Typical Section and Details* These plans and specifications are designed to provide temporary excavation support with a finite design life during construction operations.Long-term earth pressure loads shall be included in the structural design.Temporary Micropile WallCoverAugust 7, 2019Residence546 McSkimming Road266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-920819-034G-D1Grade-1of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Set RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:08/08/2019Reviewed by Engineering10/10/2019 1:56:15 PM"It should be known that this review shall notrelieve the applicant of their responsibility tocomply with the requirements of the City ofAspen. The review and approval by the City isoffered only to assist the applicant'sunderstanding of the applicable Engineeringrequirements." The issuance of a permit basedon construction documents and other data shallnot prevent the City of Aspen from requiring thecorrection of errors in the constructiondocuments and other data.
Proposed MicropileCap LocationMicropile WallBegin WallMicropile WallTurn Line 1Micropile WallTurn Line 2Micropile WallEnd Wall1+10GRADE-50+30GRADE-5Temporary Micropile WallLocationAugust 7, 2019Residence546 McSkimming Road19-034G-D1Grade-2of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:NSCALE: 1" = 5'502.55Notes:1. Base plan by Roaring Fork Engineering dated 07-31-2019.2. Micropile wall shall be constructed entirely within property boundaries.266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-920808/08/2019Reviewed by Engineering10/10/2019 1:56:22 PM"It should be known that this review shall notrelieve the applicant of their responsibility tocomply with the requirements of the City ofAspen. The review and approval by the City isoffered only to assist the applicant'sunderstanding of the applicable Engineeringrequirements." The issuance of a permit basedon construction documents and other data shallnot prevent the City of Aspen from requiring thecorrection of errors in the constructiondocuments and other data.
Elevation (feet)8200819081808170816082008210819081808170Elevation (feet)816082100+00.0 Begin Wall
System 1
EG = 8183.0
TOW = 8183.0
BOE = 8179.5
0+50
Micropile Wall CapExisting GradeBottom of Excavation(BOE)Temporary Slopeat 1.5H:1V0+13.0 Change System
System 1 to 2
EG = 8184.0
TOW = 8184.0
BOE = 8177.5
1+00
1+50
0+43.0 Change System
System 2 to 3
EG = 8185.0
TOW = 8185.0
BOE = 8175.5
0+92.0 Change System
System 3 to 4
EG = 8185.0
TOW = 8185.0
BOE = 8174.5
1+32.0 Turn Line 1
System 4 to 2
EG = 8186.0
TOW = 8186.0
BOE = 8175.0
1+47.0 Turn Line 2
System 2 to 5
EG = 8182.0
Step TOW = 8182.0 to 8180.0
BOE = 8175.0
1+55.0 End Wall
System 5
EG = 8183.0
TOW = 8181.0
BOE = 8180.5Temporary Micropile WallProfileAugust 7, 2019Residence546 McSkimming Road19-034G-D1Grade-3of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-9208SCALE:HORIZONTAL 1" = 10'VERTICAL1" = 10'ABBREVIATIONS:EG - Existing GradePG - Proposed GradeTOW - Top of WallBOE - Bottom of Excavation08/08/2019Reviewed by Engineering10/10/2019 1:56:28 PM"It should be known that this review shall notrelieve the applicant of their responsibility tocomply with the requirements of the City ofAspen. The review and approval by the City isoffered only to assist the applicant'sunderstanding of the applicable Engineeringrequirements." The issuance of a permit basedon construction documents and other data shallnot prevent the City of Aspen from requiring thecorrection of errors in the constructiondocuments and other data.
1.0 Temporary Micropile Wall Materials1.1 Micropile bars - Williams T40N Injection Bars or equivalent (Systems 2, 3 and 5)- Williams T52N Injection Bars or equivalent (Systems 1 and 4)fy=85,000 psi1.2 Grout - Grout may be neat-cement or with sand, with Type II cement in accordance with ASTM C150. Water-cement ratio should be between 0.4 and 0.6. f'c=3,000 psi (28-day strength)1.3 End hardware - Nuts shall be in accordance with manufacturer's recommendations. Bearing plate shall be in accordance with ASTM A36, Grade 36.1.4 Concrete - Concrete mix shall consist of Type II cement in accordance with ASTM C150, potable water and normal weight aggregate in accordance withASTM C33. Air entrainment is not required. Admixtures, if used, should be non-corrosive to steel. f'c=3,000 psi (28-day strength)1.5 Cap reinforcement shall be in accordance with ASTM A615. fy=60,000 psi2.0 Temporary Micropile Wall Construction Sequence2.1 Install micropiles at the locations and to the lengths shown on the plans. Micropile injection bars shall be installed per manufacturers recommendations.Micropile locations may vary by up to 3".2.2 Install end hardware and waler bars as shown on the drawings.2.3 Pour concrete cap to the minimum thickness shown on the drawings and to attain the minimum coverages specified herein. Cold weather protectionmeasures may be necessary.2.4 After concrete and grout has attained 80% of specified strength, complete excavation to full depth of wall not to exceed maximum wall heights as shown onthe drawings. Excavation shall extend to grout/micropile columns (cap may be undermined). Soil should not be left between excavation face andgrout/micropile columns.3.0 Temporary Micropile Wall Design Parameters3.1 The micropile shoring was designed in general accordance with procedures contained in the FHWA "Micropile Design and Construction Reference Manual",Publication No. FHWA NHI-05-039, December 2005.3.2 The following strength parameters were assumed for the subsoils based on the "Observation of Excavation, Proposed Additions, 546 McSkimming Road,Aspen, Colorado" by HP-Kumar, Project No. 18-7-653, report dated November 6, 2018. The following values were assumed for soil design parameters:fg(deg) (psf) (pcf)Sand and Gravel 36100 130 An experienced geotechnical engineer should verify the above design parameters during construction.3.3 Global Factor of Safety = 1.3 min.3.4 Surcharge Loading - The excavation shoring systems are designed to accommodate normal vehicular traffic and construction surcharge of material and lighttrucks, not heavy loads such as cranes (wheels or outriggers), concrete pumpers (wheels or outriggers) or large stockpiles that apply aground pressure of 1,000 psf or greater. Heavy loads shall not be placed within 8 feet of micropile cap unless approved by RJEngineering.3.5 No groundwater table was assumed. If groundwater is encountered during excavation, the excavation shall not continue and the site shall be dewatered tobelow the base of planned excavation elevation prior to completion of the excavation.3.6 The micropile walls lateral deflection may be up to about 0.003' per foot of excavation depth at the ROW, and no adverse deflection of the ground surface atthe private property line based on anticipated subsurface conditions.4.0 Special Provisions4.1 Wall geometry used in design was based on plans provided by the client.4.2 This design is valid only for B&Y Drilling, Inc. at the subject site.4.3 Excavation shall extend to micropile columns. During the excavation process, material should not be left between the excavation face and the grout/micropilecolumn.4.4 The micropile wall designs are valid only for dry surface and subsurface conditions. If surface water or groundwater is encountered during excavation orinstallation, RJ Engineering should be notified immediately and the wall may be redesigned at the discretion of RJ Engineering. Surface and subsurfacedrainage from adjacent properties should not be discharged at the top or through the micropile wall. Saturated soils may result in materials piping out frombetween micropiles resulting in failure and/or excessive wall movements.4.5 The design life on this micropile wall is 12 weeks. Design life is defined by the beginning of excavation to the construction of the foundation wall. If theduration of the project exceeds the 12 week duration, RJ Engineering shall be contacted to evaluate the performance of the system and determine if thedesign life can be extended.4.6 RJ Engineering is not responsible for maintaining slope stability above and below the micropile wall during construction.4.7 There appears to be no known utility conflicts with installation of the micropile walls. Utility locations presented shall be field verified prior to micropile wallinstallation.4.8 RJ Engineering is not responsible for quality control, quality assurance, changed conditions or problems resulting from improper construction techniques.4.9 RJ Engineering is not responsible for construction site safety.4.10 RJ Engineering is not responsible for wall layout. General contractor or representative of the general contractor is responsible for micropile wall layout.Temporary Micropile WallGeneral NotesAugust 7, 2019Residence546 McSkimming Road19-034G-D1Grade-4of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-920808/08/2019Reviewed by Engineering10/10/2019 1:56:34 PM"It should be known that this review shall notrelieve the applicant of their responsibility tocomply with the requirements of the City ofAspen. The review and approval by the City isoffered only to assist the applicant'sunderstanding of the applicable Engineeringrequirements." The issuance of a permit basedon construction documents and other data shallnot prevent the City of Aspen from requiring thecorrection of errors in the constructiondocuments and other data.
Micropile WallSystem 2Station 0+30Micropile WallSystem 4Station 1+10Temporary Micropile WallSectionsAugust 7, 2019Residence546 McSkimming Road19-034G-D1Grade-5of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-9208SCALE:HORIZONTAL 1" = 10'VERTICAL1" = 10'ABBREVIATIONSEG - Existing GradePG - Proposed GradeTOW - Top of WallBOE - Bottom of Excavation08/08/2019Reviewed by Engineering10/10/2019 1:56:39 PM"It should be known that this review shall notrelieve the applicant of their responsibility tocomply with the requirements of the City ofAspen. The review and approval by the City isoffered only to assist the applicant'sunderstanding of the applicable Engineeringrequirements." The issuance of a permit basedon construction documents and other data shallnot prevent the City of Aspen from requiring thecorrection of errors in the constructiondocuments and other data.
Injection BarField Installed GroutMICROPILE CROSSSECTION A-A'BoreholeMICROPILE BEARING PLATEFRONT VIEW6"Micropile Hole Diameter= Bar Diameter +1/4"6"1/2" MinHex NutBearing PlateMICROPILE DETAILBARGroutA'AWilliams Injection Bar6" Min9"ColumnMICROPILE BEARING PLATESIDE VIEWCross Bar,24" OCVertical PileMICROPILE CAP PLAN VIEWVERTICAL SYSTEMSYSTEMS 2, 3, 4 AND 5MICROPILE CAP CROSS SECTIONVERTICAL SYSTEMSYSTEMS 2, 3, 4 AND 512"18"Cross Bar, #4 RebarContinuous Waler,#4 Rebar3"2" min.3,000 psi ConcreteGroutVertical PileContinuous Waler,#4 RebarNotes: Vertical piles 12" center to center withback row at 12" offset12"12"Continuous Waler,#4 RebarContinuous Waler,#4 RebarCross Bar,24" OCVertical PileMICROPILE CAP PLAN VIEWVERTICAL SYSTEMSYSTEM 1MICROPILE CAP CROSS SECTIONVERTICAL SYSTEMSYSTEM 112"6"Cross Bar, #4 RebarContinuous Waler,#4 Rebar3"2" min.3,000 psi ConcreteGroutContinuous Waler,#4 RebarNotes: Horizontal reinforcement shall becontinuous between systems.Continuous Waler,#4 RebarContinuous Waler,#4 RebarTYPICAL SECTIONSYSTEM 411.0' MAX CUT Top of Cap/Wall El.(See Sheet Grade-3)Micropile CapSee DetailsDesign Height (DH)11 ft. max.ProposedExcavationRL = 20 ft.Williams T52NInjection Bar Bottom of Excavation El.(See Sheet Grade-3)Existing GradeTYPICAL SECTIONSYSTEM 57.0' MAX CUT Top of Cap/Wall El.(See Sheet Grade-3)Design Height (DH)7.0 ft. max.VariesVaries2.0 ft. max.ProposedExcavation Bottom of Excavation El.(See Sheet Grade-3)Micropile CapSee DetailsProposed TemporaryExcavation at 1.5H:1VExisting GradeRL = 10 ft.Williams T40NInjection BarTYPICAL SECTIONSYSTEM 311.0' MAX CUT Top of Cap/Wall El.(See Sheet Grade-3)Micropile CapSee DetailsDesign Height (DH)11 ft. max.ProposedExcavationRL = 20 ft.Williams T40NInjection Bar Bottom of Excavation El.(See Sheet B.1.03)Existing GradeTYPICAL SECTIONSYSTEM 210.0' MAX CUT Top of Cap/Wall El.(See Sheet Grade-3)Design Height (DH)10 ft. max.ProposedExcavation Bottom of Excavation El.(See Sheet Grade-3)Micropile CapSee DetailsExisting GradeRL = 15 ft.Williams T40NInjection BarTYPICAL SECTIONSYSTEM 17.0' MAX CUT Top of Cap/Wall El.(See Sheet Grade-3)Design Height (DH)7.0 ft. max.ProposedExcavation Bottom of Excavation El.(See Sheet Grade-3)Micropile CapSee DetailsExisting GradeRL = 10 ft.Williams T40NInjection BarTemporary Micropile WallTypical Sections and DetailsAugust 7, 2019Residence546 McSkimming Road19-034G-D1Grade-6of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:NOT TO SCALEAbbreviations:RL - Reinforcement LengthDH - Design Height266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-9208NOTES:1. See Sheet Grade-3 for top of wall/cap and bottom of excavation elevations.08/08/2019Reviewed by Engineering10/10/2019 1:56:44 PM"It should be known that this review shall notrelieve the applicant of their responsibility tocomply with the requirements of the City ofAspen. The review and approval by the City isoffered only to assist the applicant'sunderstanding of the applicable Engineeringrequirements." The issuance of a permit basedon construction documents and other data shallnot prevent the City of Aspen from requiring thecorrection of errors in the constructiondocuments and other data.