HomeMy WebLinkAboutFile Documents.COACH RD.0079.2018 (54).ARBKDouble Bar X Residence110 & 112 Coach RoadAspen, ColoradoTemporary Excavation ShoringMicropile and Ground Nail Walls*Grade-1. Temporary Micropile and Ground Nail Walls - CoverGrade-2. Temporary Micropile and Ground Nail Walls - LocationsGrade-3. Temporary Micropile and Ground Nail Walls - ProfileGrade-4. Temporary Micropile and Ground Nail Walls - General NotesGrade-5. Temporary Micropile and Ground Nail Walls - SectionsGrade-6. Temporary Micropile and Ground Nail Walls - Typical Sections 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 andGround Nail WallsCoverApril 5, 2018Double Bar X Residence110 & 112 Coach Road266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-920818-014G-D1Grade-1of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Set RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:4/5/2018Reviewed by Engineering04/10/2019 10:15:45 AM"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.
oeoeoeoeoeTemporary Ground Nail Wall(Upper Wall)Temporary Micropile WallTemporary Ground Nail Wall(Lower Wall)Upper WallBeginUpper WallTurn Line 1Upper WallTurn Line 2Upper WallTurn Line 3Upper WallTurn Line 4Upper WallTurn Line 5Upper WallTurn Line 6Upper WallEndLower WallBeginLower WallTurn Line 1Lower WallTurn Line 2Lower WallTurn Line 3Lower WallEnd0+90Grade-50+50Grade-50+70Grade-50
+
2
0 0+400
+
6
0
0+801+001
+
2
0
1
+
4
0
0+20
0+40
0
+
6
0
0
+
8
0
1
+
0
0 1+201+40Ground Nailsbelow GradeGround Nailsbelow Grade1
+
6
0
Temporary Micropile andGround Nail WallsLocationsApril 5, 2018Double Bar X Residence110 & 112 Coach Road18-014G-D1Grade-2of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Notes:1. Base plan by Roaring Fork Engineering dated 02-28-2018.2. For utility installation, trench to back of micropile or ground nail wall. For micropilewall, hand dig between micropiles and extend utilities through wall. For groundnail wall, saw or hammer through shotcrete facing and extend utilities through wall.SCALE: 1" = 10'100510NSeal:266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-92084/5/2018Reviewed by Engineering04/10/2019 10:15:52 AM"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.
77807790777077607750Elevation (feet)
0+00.0 Begin Wall
Ground Nail
EG = 7787.0
TOW = 7787.0
BOE = 7787.0
0+50 7800778077907770776077507800NAIL LENGTH SCHEDULEMicropile WallCapTop of GroundNail Wall (TOW)1+00 Bottom of Excavation(BOE)Temporary Slopeat 1.5H:1VElevation (feet)Temporary Slopeat 1.5H:1V0+35.0 Turn Line 1
Ground Nail
EG = 7793.0
TOW = 7793.0
BOE = 7780.0
1+06.0 Turn Line 6
End Ground Nail
Begin Micropile
EG = 7789.0
TOW = 7789.0
Step BOE = 7780.0 to 7778.0
10 feetExisting GradeStrip DrainsGround Nail1+5020 feet15 feet0+47.0 Turn Line 2
Ground Nail
EG = 7792.0
TOW = 7792.0
BOE = 7780.0
0+64.0 Turn Line 3
Ground Nail
EG = 7792.0
TOW = 7792.0
BOE = 7780.0
0+79.0 Step BOE
Ground Nail
EG = 7791.3
TOW = 7791.3
Step BOE = 7780.0 to 7775.0
0+84.0 Turn Line 4
Ground Nail
EG = 7791.0
TOW = 7791.0
Step BOE = 7775.0 to 7780.0
0+99.0 Turn Line 5
Ground Nail
EG = 7790.0
TOW = 7790.0
BOE = 7780.0
1+06.0 End Wall
Micropile
EG = 7787.0
TOW = 7787.0
BOE = 7787.0UPPER WALL77807790777077607750Elevation (feet)
0+00.0 Begin Wall
Ground Nail
PG = 7767.0
TOW = 7767.0
BOE = 7767.0
0+50 78007780779077707760775078001+00
Elevation (feet)
0+11.0 Turn Line 1
Ground Nail
PG = 7767.0
TOW = 7767.0
BOE = 7761.0
1+50
0+52.0 Turn Line 2
Ground Nail
PG = 7775.0
TOW = 7775.0
BOE = 7761.0
0+79.0 Step TOW
Ground Nail
PG = 7775.0
Step TOW = 7775.0 to 7778.0
BOE = 7761.0
1+02.0 Turn Line 3
Ground Nail
PG = 7778.0
TOW = 7778.0
BOE = 7761.0LOWER WALL1+52.0 End Wall
Ground Naul
PG = 7778.0
TOW = 7778.0
BOE = 7778.0 Skew nails at angle shown withrespect to shotcrete face toavoid conservation easement10 deg.
20 deg.
30 deg.
45 deg.
20 deg.
10 deg.Temporary Slopeat 1.5H:1VStrip DrainsGround NailExcavated/ProposedGradeTop of GroundNail Wall (TOW)Temporary Slopeat 1.5H:1VBottom of Excavation(BOE)Temporary Micropile andGround Nail WallsProfileApril 5, 2018Double Bar X Residence110 & 112 Coach Road18-014G-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 Excavation4/5/2018Reviewed by Engineering04/10/2019 10:16:02 AM"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 B7X1-38 Injection Bars or equivalentfy=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 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 reinforcing 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 "Subsoil Study for Foundation Design, Proposed Residence, Lot 7, DoubleBar X Ranch, Aspen, Colorado" by HP-Kumar, Project No. 109 110A, report dated May 22, 2009. The following values were assumed for soil design parameters: fg (deg) (psf) (pcf)Sand and Gravel 38100 130 An experienced geotechnical engineer should verify the above design parameters during construction.3.3 Global Factor of Safety = 1.3 min. (temporary)3.4 Surcharge Loading - The excavation shoring systems are designed to accommodate normal construction surcharge of material and light trucks, not heavyloads such as cranes (wheels or outriggers), concrete pumpers (wheels or outriggers) or large stockpiles that apply a ground pressure of1,000 psf or greater. Heavy loads shall not be placed within 8 feet of micropile cap unless approved by RJ Engineering.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 client.4.2 This design is valid only for B&Y Drilling, Inc. at the subject site. B&Y Drilling shall construct all shoring systems shown herein.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 backfill completion 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 RJ Engineering is not aware of any utility conflicts. The contractors are responsible for field locating all nearby utilities. Conflicting utilities may requiremicropile wall redesign at RJ Engineerings' discretion.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.4.11 Observation of micropile wall installation should be performed by a qualified engineer. Inspection and/or monitoring of the micropile wall after completion ofexcavation should be performed. The frequency and duration of the observation and monitoring shall be determined by the qualified engineer. Thequalified engineer shall have experience with design and installation of micropile wall systems using injection bars. Observations shall be made at least ona weekly basis during installation and during the service life of the system.5.0 Temporary Ground Nail Wall Materials5.1 Ground Nails - Grade 75 threadbar or equivalent in accordance with ASTM A615 or Williams injection bar.fy=75,000 psi5.2 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=1,500 psi minimum 3 dayf'c=3,000 psi minimum 28 day5.3 End hardware - Nuts and washers shall be in accordance with ground nail manufacturer's recommendations. Bearing plate shall be in accordance with ASTM A36, Grade 36.5.4 Shotcrete - Shotcrete mix shall consist of Type II cement in accordance with ASTM C150, potable water and normal weight aggregate in accordance with ASTM C33.Admixtures, if used, should be non-corrosive to steel.f'c=4,000 psi (28-day strength)5.5 Welded wire mesh shall be in accordance with ASTM A185.5.6 Walers and vertical bearing bars shall be in accordance with ASTM A615.fy=60,000 psi5.7 Strip drains consist of 12" wide dimpled cores wrapped in geotextile. The compressive strength of the core should be at least 20 psi when tested in accordance with ASTMD1621, and it's in-plane flow capacity should be at least 10 gpm/ft when tested in accordance with ASTM D47165.8 Centralizers should be plastic that will provide free passage of grout and attached to the nails in accordance with the manufacturer's recommendations. Centralizers notrequired for injection bars.6.0 Temporary Ground Nail Wall Construction Sequence6.1 Excavate one lift to a maximum depth of five feet.6.2 Install ground nails at the locations and to the lengths shown on the plans. Ground nail location may vary by up to 6". Tremie the grout from the bottom of the hole up.6.3 Install strip drains, welded wire mesh, walers and bearing bars as shown on the drawings. Use chairs to hold the welded wire mesh away from the soil as necessary.6.4 Install shotcrete to the minimum thickness shown on the drawings and to attain the minimum coverages specified herein. Give special attention to filling the void in theborehole above the grout line. Cold weather protection measures may be necessary.6.5 Install the ground nail end hardware after the minimum inside coverage specified herein has been attained. While the shotcrete is still wet, embed the plate into the shotcretesurface until there is no void behind the plate. Handtighten the nut.6.6 Once the grout and shotcrete have attained 80% of their specific strengths, repeat 2.1-2.5 to the bottom of the wall.6.7 At the bottom lift, complete strip drains to daylight as shown on the drawings.7.0 Temporary Ground Nail Wall Design Parameters7.1 The ground nail wall has been designed in general accordance with procedures contained in the FWHA "Manual for Design and Construction Monitoringof Soil Nail Walls", Report No. FHWA-SA-96-069R.7.2 The following strength parameters were assumed for the subsoils based on the "Subsoil Study for Foundation Design, Proposed Residence, Lot 7,Double Bar X Ranch, Aspen, Colorado" by HP-Kumar, Project No. 109 110A, report dated May 22, 2009.The following values were assumed for soil design parameters: fcgQult (deg) (psf) (pcf) (psi)Sand and Gravel 38 100 130 20An experienced geotechnical engineer should verify the above design parameters during construction.7.3 Groundwater level was assumed to be below the base of the wall.7.4 Factors of safetyGlobal - FS > 1.3 (temporary)Nail Tension Strength Factor - QN = 0.55Nail Pullout Resistance Factor - QQ = 0.50Nail Head Strength Factor - QF = 0.677.5 Surcharge Loading - The ground nail wall is designed to accommodate normal construction surcharge of material and light trucks, not heavy loads suchas cranes (wheels or outriggers), concrete pumpers (wheels or outriggers) or large stockpiles that apply a ground pressure of 1,000psf or greater. Heavy loads shall not be placed within 6 feet of face of ground nail wall unless approved by RJ Engineering.7.6 Corrosivity was assumed to be low.7.7 The maximum design life of the temporary shoring is 12 months.8.0 Special Notes8.1 Wall geometry used in design was based on information from plans provided by client.8.2 This design is valid only for B&Y Drilling, Inc. at the subject site. B&Y Drilling shall construct all shoring systems shown herein.8.3 RJ Engineering is not responsible for maintaining slope stability above and below the ground nail wall during construction.8.4 RJ Engineering is not aware of any utility conflicts. The contractors are responsible for field locating all nearby utilities. Conflicting utilities may requireground nail wall redesign at RJ Engineerings' discretion.8.5 RJ Engineering is not responsible for quality control, quality assurance, changed conditions or problems resulting from improper construction techniques,and construction site safety.8.6 RJ Engineering is not responsible for wall layout. Wall layout shall be performed by the contractor or contractor's representative.Temporary Micropile andGround Nail WallsGeneral NotesApril 5, 2018Double Bar X Residence110 & 112 Coach Road18-014G-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) 230-92084/5/2018Reviewed by Engineering04/10/2019 10:16:09 AM"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.
Station 0+30 (Upper Wall)Ground NailStation 0+91 (Upper Wall)Station 0+70 (Lower Wall)Ground NailStation 1+20 (Upper Wall)Station 0+90 (Lower Wall)Ground Nail and MicropileTemporary Micropile andGround Nail WallsSectionsApril 5, 2018Double Bar X Residence110 & 112 Coach Road18-014G-D1Grade-5of 6RDJProject Number:Date:Sheet Number:Prepared by:Project:Sheet RevisionsDateRevision/IssuePrepared byB&Y Drilling, Inc.Designed For:Seal:Notes:1. The micropile and ground nail walls shall be constructed entirely within property boundaries.266 Red Cliff Circle Glenwood Springs, CO 81601Phone: (970) 230-9208SCALE:HORIZONTAL 1" = 10'VERTICAL1" = 10'ABBREVIATIONSEG - Existing GradeTOW - Top of WallBOE - Bottom of Excavation4/5/2018Reviewed by Engineering04/10/2019 10:16:15 AM"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 DETAILGroutA'AWilliams Injection Bar6" Min9"ColumnMICROPILE BEARING PLATESIDE VIEWCross Bar,24" OCVertical PileMICROPILE CAP PLAN VIEWVERTICAL SYSTEMMICROPILE CAP CROSS SECTIONVERTICAL SYSTEM12"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 RebarTYPICAL SECTIONMICROPILE WALL11.0' MAX CUTExisting GradeBottom of Excavation(See Sheet Grade-3)Top of Cap/Wall El.(See Sheet Grade-3)Williams B7X1-38Injection BarProposed ExcavationDH = 11.0 ft. max.Micropile CapSee DetailsRL = 20 ft.NOTES:1. SHOTCRETE REINFORCING STEEL NOT SHOWN FOR CLARITYMAXIMUMWALL HEIGHT(DH)VERTICALSPACING(SV)HORIZONTALSPACING(SH)REINFORCEMENTLENGTH(RL)REINFORCEMENT BAR17.0 FEET#8 GRADE 75 ALL THREADOR WILLIAMS B7X1-32 INJECTION BARSEE SHEETGRADE-35 FEET5 FEETREINFORCEMENT SCHEDULEBottom ofShoring/Wall*Top ofShoring/Wall*3 ft. max.Maximum Design Height = DHVariesSV3 ft. max.* SEE SHEET GRADE-3 FOR TOP AND BOTTOM OF WALL/EXCAVATION ELEVATIONSTEMPORARY GROUND NAIL WALLTYPICAL SECTIONExisting ground surface nearlylevel to 5H:1V max.Strip drains shall be 12 incheswide and placed 10-foot on centerand shall not extend within 18inches of top of shotcreteShotcrete battervertical to 5 degreesDaylight strip drainsShotcrete4-inch min.RLGROUND NAIL SHOTCRETE DETAILB'BGROUND NAILCROSS SECTION B-B'4-INCH MIN.GROUND NAIL BEARING PLATEFRONT VIEW8"8"MESH OVERLAPMIN 2 GRIDSSHOTCRETE REINFORCEMENTFRONT VIEW1/2" MIN4"GROUND NAIL BEARING PLATESIDE VIEWGROUND NAILBEARING PLATEWELDED WIRE FABRIC4"x4" - W2.9xW2.9HORIZONTAL BEARING BARS (2)#4 @ 6" OC(CONTINUOUS)VERTICAL BEARING BARS (2)#4 @ 6" OC30" MIN. LENGTHGROUND NAIL HOLE DIAMETER= BAR DIAMETER + 14"SHOTCRETEGEOCOMPOSITE STRIP DRAINWELDED WIRE MESHSHOTCRETEVERTICALBEARING BARBEARING PLATEHEX NUTHORIZONTAL WALERSSHOTCRETE FACINGGROUTCENTRALIZER @ MAX 10 FT. OC AND WITHIN 2 FT.OF THE TOP AND BOTTOM OF DRILLHOLE(NOT REQUIRED FOR INJECTION BARS)GRADE 75 ALL-THREAD ORWILLIAMS INJECTION BARBOREHOLEGROUTBARNOTE: Use soil nail details forshotcrete waler on MicropileWall - System 4Temporary Micropile andGround Nail WallsTypical Sections and DetailsApril 5, 2018Double Bar X Residence110 & 112 Coach Road18-014G-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.4/5/2018Reviewed by Engineering04/10/2019 10:16:20 AM"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.