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HomeMy WebLinkAboutR-418837M DESIGN NOTES O Reference: Barhhausen Consulting Engineers, Inc., Detailed Grading Plan, Sheet 9 of 24 dated June 6, 2021 O The following design assumptions were used: Internal angle of friction for reinforced soil = 32 degrees (design only) Q Unit weight of reinforced soil = 125 pcf LLJ Maximum wall height = 8.00 feet (Reinforced) 4.00 feet (Gravity) Batter of wall = 11 : 10V Surcharges (Where Applicable) = 2500 pit Footing Strip Load 250 psf Uniform Soil Load TECHNICAL SPECIFICATIONS FOR MECHANICALLY STABILIZED LOCK & LOAD RETAINING WALLS GENERAL A. The Work involves the supply and installation of soil -reinforced retaining walls. The Concrete Panels and Counterforts will consist of Lock & Load Stone. Counterforts and Geogrid are the types of soil reinforcement. The work will include, but is not limited to: A-1 excavation to the grades shown on the civil drawings A-2 supply and installation of geogrid reinforcement A-3 supply and installation of drainage fill and piping A-4 supply and installation of segmental Lock & Load Stones A-5 supply and installation of retained and reinforced soil ill B. The walls shall be installed on undisturbed Native Soils or Structural Fill, as appropriate. Q MATERIALS d A. Concrete Panels and Counterforts are locked together to form a "Stone". The retaining walls have been designed on the basis of Lock & Load Retaining Wall "Stones". "Stones" are to be purchased from a licensed Lock & Load manufacturer. The Lock & Load trademark on each pallet identifies Lock & Load products. B. Information on the purchase of Lock & Load products can be obtained through: fn LOCK +LOAD Retaining Walls, Ltd. fY Telephone: (604) 732-9990 uJ Websi[e: www.lock-load.com d C. Geogrid: Structural geogrid reinforcement shall consist of Minagrid 5XT, or an 75 alternative as approved by the Geotechnical Engineer. D. Drainage Fill: Drainage Fill placed around and above the perforated drainage pipe shall Consist of round or angular 3/4-inch to 1-inch "clean" rock. E. Face Gravel: 3/4-inch to 1-inch clean crushed rock or approved equivalent by the Geotechnical Engineer. F. Reinforced and Retained Soil: Suitable granular material approved by the Geotechnical Engineer. G. Leveling Course: The Leveling Course shall Consist of angular, crushed aggregate with maximum size of 3/4 inch. The Leveling Course Fill may be single size or may be well -graded Containing a maximum of 5 % passing the No. 200 sieve. EXECUTION A. Contractor shall excavate to the lines and grades shown on the construction drawings. The Geotechnical Engineer should observe the excavation prior to the placement of the leveling material or fill soils. B. Over -excavation of deleterious soils, rock, and debris shall be replaced With material meeting the specifications described in Materials Section "F" above. The material shall be Compacted to 95% ofASTM D1557 (Modified Proctor) and shall be at (or slightly above) the optimum moisture Content. C. The first course of Concrete Lock & Load "Stones" shall be placed on the Leveling Course, and the alignment and level shall be checked. D. "Stones" shall be placed with the top of the panel level and parallel to the wall face. The Counterfort Base shall be installed horizontal and perpendicular to the face of the retaining wall. E. Geogrid shall be oriented with the highest -strength axis perpendicular to the wall alignment. F. Geogrid reinforcement shall be placed at the levels and to the lengths shown on the drawings and shall begin at the back of the Lock & Load Panels. G. The geogrid shall be laid horizontally in the direction perpendicular to the face of the retaining wall. The geogrid shall be pulled taut, free of wrinkles, and anchored prior to backfll placement on the geogrid. H. The geogrid reinforcement shall be Continuous throughout respective embedment lengths. Spliced connections between shorter pieces of geogrid are not permitted. I. The drainage pipe discharge points shall be Connected to an approved system. J. Reinforced and Retained Backfill shall be placed, spread, and Compacted in such a manner that minimizes the development of slack in the geogrid. K. Reinforced and Retained Backfill shall be placed and compacted in lifts not to exceed 8 inches where hand -compaction equipment is used and not more than 12 inches where heavy Compaction equipment is used. Compaction should occur over the tail of the Counterfort prior to areas away from the retaining wall. Hand -operated vibratory plate compaction equipment (700 lb. to 1,000 Ill shall be used to compact the face gravel at wall face. L. Reinforced and Retained Backfill shall be Compacted to 95 % of the maximum density as determined by ASTM D1557 (Modified Proctor) or equivalent. The moisture content of the backfill material prior to and during compaction shall be uniformly distributed throughout each layer and shall be at (or slightly above) the optimum moisture content. MSE LOCK & LOAD WALL DESIGN AND NOTES OF SUMPTER SHORT PLAT A PORTION OF SECTION 14, TOWNSHIP 23 N., RANGE 05 E., W.M. CITY OF RENTON, KING COUNTY, WASHINGTON GEOGRID SCHEDULE Panels Height id •th Layers III©©IIII�©IIIII�' © ' r r r r EEMEMM n® . r r WEWMWW M: r r : r r EEMEMM GEOGRID: A = Minagrid 5XT M. Hand -operated Compaction equipment (700 lb. to 1,000 lb.) shall be used within 26 inches of the front face of the Concrete facing. N. Tracked construction equipment shall not be operated directly upon the geogrid reinforcement. A minimum fill thickness of 6 inches is required prior to operation of tracked vehicles over the geogrid. O. Rubber -tired equipment may pass over the geogrid reinforcement at speeds less than 10 mph. Sudden braking and sharp turning shall be avoided. P. At the end of each day of operation, the contractor shall slope the last lift of reinforced backfill away from the wall units to direct runoff away from the wall face. The contractor shall not allow surface runoff from adjacent areas to enter the wall construction site. NOTES 1. Wall alignment and heights to be established by Contractor / Surveyor. (-Fence (By Others) 61 Max. Structural and Traffic Loading Must Be i Oull The zone Of Influence If H:fv) Retained Structural Fill Soil Wall Neigh H=4' o� 1 6�. or ., Competent Cut " %p.; 12 (Mtn • Drainage Blanket 'a"•' 16' of Well-Compactetl If (As Neceasav per Geotechnical En9snee �— Face Gravel 1 NOTE: Geotechnical Engineer shall 111 111-111-1evaluate the need for Supplementary NOTE: Well reseal must postage behind the Reinforcement 4' Pedorakd DalnDlpe be placed during or immediately - - (On-Gotle) Zone during Construction. afterwall conslctlon. 4o-6" Leveling Course Surround with Clean Rock GRAVITY WALL CONDITION TOTAL HEIGHT (H)=4e (MAX.) 2. Geotechnical Engineer to confirm Keyway stability, support characteristics, and overall stability prior to construction. 3. Construction of the wall should occur in conjunction with installation of utilities within the geogrid reinforcement zone. The wall should be built to the grade of the geogrid layer immediately above the utility alignment. The utility must be installed prior to placing the first geogrid layer above the utility. After the utility is installed, the remaining section of the wall may be constructed as the alignment is backfilled. Construction as such will help minimize damages to the geogrid. Maintenance of the utility alignment must preserve the geogrid, if encountered. BENCHMARK FOUND PUNCHMARK IN 1y" BRASS FOUND PUNCHMARK IN IY40 BRASS DATUM DOME IN CONCRETE MONUMENT IN DOME IN 04 CASE 0.5' BELOW GRADE OBSERVED 0.4' BELOW GRADE 37555 HORIZONTAL DATUM: VERTICAL DATUM: (NAD 83/11) (NAD 83/11) 1 '83/'91 NAVD '88 N:175866.55, E:1319201.78 N:175852.22, E:1319809.82 kN REVISION NOT -TO -SCALE 27" Jai F TT Y z 6.. — ----3 2 i m TOP VIEW �75 SIDE VIEW z 7.651, l __ _ Y 0 4. ¢ m 1' 27" ► Bo goo 11s• 90 L] 21_ p.q• II 'I T REINFORCEMENT BAR BENDING DETAIL PICTOF NOTES: 1. Installation to be Completed in accordance with manufacturer's specifications. 2. Do not scale from drawings. LOCK & LOAD COUNTERFORT NOT - TO - SCALE — solm mi°Da'I°g7i«r �� DATUM M NL LY[ r IR�eW eesa.vlmtsnr � I ......,.,I_,oa,,..w" eNOTE: Well Toe cover shall be 24" (Min.) for 2Hh V Sloping condition In Front of Wall. TYPICAL WALL SECTION (GEOGRID) FRONT VIEW Outline of Connecting Loop 6]5" TOP VIEW 16" IF NOT - TO - SCALE Poly Fiber Reinforced 1 1/2" fiber (4 lbs./yard) 6,000 psi concrete Casting Tolerance SIDE VII NOTES: 1. Installation to be Completed in accordance with manufacturer's specifications. 2. Do not scale from drawings. LOCK & LOAD PANEL NOT - TO - SCALE CALL BEFORE YOU DIG: 1-800-424-5555 TS' O 00 ar M O O O t N i O � R c T O) n o U O O O O In ' 6 m a O Q J .21 Sheet No. LL1 R-4188 IN COMPLIANCE WITH CITY OF RENTON STANDARDS CITY OF MSE LOCK & LOAD WALL DESIGN AND NOTES _ RENTON SUMPTER SHORT PLAT Planning/Building/Public Works Dept. �� KIM GREERxtr p