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DESIGN NOTES: <br />Reference: CPH Consultants, Civil Plans <br />The following design assumptions were used: <br />Internal angle of friction for reinforced soil = 32 degrees (design only - see Material <br />Note "F") <br />Unit weight of reinforced soil = 125 pet <br />Maximum wall height = 18.67 feet <br />Batter of wall = 1 H : 10V <br />Surcharge = Footing Load <br />TECHNICAL SPECIFICATIONS FOR MECHANICALLY STABILIZED LOCK & LOAD <br />RETAINING WALLS <br />GENERAL: <br />A. The work involves the supply and installation of soil reinforced retaining walls. The <br />Concrete Panels and Counterforts will consist of Lock & Load Stone. Counterfort and <br />Geogrid are the types of soil reinforcement. The work will include, but is not limited <br />to: <br />A-1 excavation to the grades shown on the civil drawings <br />A-2 supply and installation of geogrid reinforcement <br />A-3 supply and installation of drainage fill and piping <br />A-4 supply and installation of segmental Lock & Load Stones <br />A-5 supply and installation of retained and reinforced soil fill <br />B. The walls shall be installed on undisturbed Native Soils or Structural Fill, as <br />appropriate. <br />MATERIALS <br />A. Concrete Panels and Counterforts are locked together to form a "Stone". The <br />retaining walls have been designed on the basis of Lock & Load Retaining Wall <br />"Stones". Stones are to be purchased from a licensed Lock & Load manufacturer. <br />The Lock & Load trademark on each pallet identifies Lock & Load products. <br />B. Information on the purchase of Lock & Load products can be obtained through: <br />Lock & Load Retaining Walls Ltd. <br />Tel. (604) 732-9990 <br />Website: www.lock-load.com <br />C. Geogrid - See Geogrid Schedule. <br />D. Drainage Fill - Drainage Fill placed around and above the perforated drainage pipe <br />shall consist of clean aggregate between 3/4 inch and 1 1/2 inch. <br />E. Face Gravel - 3/4 inch to 1 inch Clean Crushed Rock, no fines. Face Gravel shall be <br />compacted thoroughly to ensure no settlement of panels. <br />F. Reinforced Backfill - Suitable granular material approved by the Geotechnical Engineer. <br />G. Leveling Pad - The Leveling Pad shall consist of angular, crushed aggregate of <br />maximum size of 3/4 inch. The Leveling Pad Fill may be single size or may be well <br />graded containing a maximum of 5 % passing the #200 sieve. <br />EXECUTION <br />A. Contractor shall excavate to the lines and grades shown on the construction drawings. <br />The Geotechnical Engineer should observe the excavation prior to the placement of <br />the leveling material or fill soils. <br />B. Over -excavation of deleterious soils or rock shall be replaced with material meeting <br />the specifications described in the section "Material G" above, and compacted to 95 <br />of ASTM D-1557-91 (Modified Proctor) within 2 % of the optimum moisture content <br />of the soil. <br />C. The first course of concrete Lock & Load Stones shall be placed on the Leveling Pad <br />and the alignment and level checked. <br />D. Stones shall be placed with the top of the panel level and parallel to the wall face. <br />The Counterfort Base installs horizontal and perpendicular to the face of the retaining <br />wall. <br />E. Geogrid shall be oriented with the highest strength axis perpendicular to the wall <br />alignment. <br />F. Geogrid reinforcement shall be placed at the levels and to the lengths shown on the <br />drawings beginning at the back of the Lock & Load Panels. <br />G. The geogrid shall be laid horizontally in the direction perpendicular to the face of the <br />retaining wall. The geogrid shall be pulled taut, free of wrinkles and anchored prior to <br />backfill placement on the geogrid. <br />H. The geogrid reinforcement shall be continuous throughout their embedment lengths. <br />Spliced connection between shorter pieces of geogrid is not permitted. <br />I. The drainage pipe discharge points shall be connected to approved discharge. <br />J. Reinforced and Retained Backfill shall be placed, spread and compacted in such a <br />manner that minimizes the development of slack in the geogrid. <br />K. Reinforced and Retained Backfill shall be placed and compacted in lifts not to <br />exceed 8 inches where hand compaction equipment is used and not more than 12 inches <br />where heavy compaction equipment is used. FIRST - compact over tail of Counterfort <br />then away from the retaining wall structure. Hand operated compaction equipment <br />(700 lb. to 1,000 lb.) Vibratory Plate shall be used to compact face gravel at wall face. <br />L. Reinforced and Retained Backfill shall be compacted to 95 % of the maximum density <br />as determined byASTM D-1557-91 (Modified Proctor) or equivalent. The moisture <br />content of the backfill material prior to and during compaction shall be uniformly <br />distributed throughout each layer and shall be within 2 percentage points of the <br />optimum moisture content. <br />M. Hand -operated equipment (700 lb. to 1,000 lb. Vibratory Plate) shall be used within <br />26 inches of the front face of the concrete facing. <br />N. Tracked construction equipment shall not be operated directly upon the geogrid <br />reinforcement. A minimum fill thickness of 6 inches is required prior to operation of <br />tracked vehicles over the geogrid. <br />O. Rubber tired equipment may pass over the geogrid reinforcement at slow speeds <br />less than 5 mph. Sudden braking and sharp turning shall be avoided. <br />P. At the end of each day of operation, the contractor shall slope the last lift of <br />reinforced backfill away from the wall units to direct runoff away from the wall face. <br />The contractor shall not allow surface runoff from adjacent areas to enter the wall <br />construction site. <br />Chain Link <br />Fence or Guardrail <br />6' - 0" As Required <br />Max. <br />�o <br />4Max. 2'-6- <br />Wall Height Min. 10 <br />3 . <br />Fence Post (By Others) <br />— Embedded in Sleeve, <br />1" Min. Clearance Each Side <br />of Post <br />5' Min. Setback <br />Z" "' ' ' Structural Fill <br />(See Materials Note F) <br />18" of Well Compacted <br />ice Gravel (See Materials <br />Note E) <br />PTN. OF SE 1/4, SE 1/4 OF SEC 18, TWP 28 N, R5E W.M. <br />Retained <br />—III Soils <br />_III <br />NOTE: Wall Toe Backfill' 4" Perforated Drainpipe <br />must be placed during or immediately 12"( in) o Surround with 1 cf of <br />after Wall Construction.-III=III= Washed Rock per lineal foot <br />— = of Pipe NOTE: Geotechnical Engineer shall <br />2" - 4" Leveling Pad Competent Subgrade evaluate the need for Supplementary <br />(See Materials Note G) (Geotechnical Engineer to Confirm) Drainage behind the Reinforcement <br />Zone during Construction. <br />STRUCTURAL FILL <br />GRAVITY WALL CONDITION <br />(4 Foot Max. Height) <br />NOT - TO - SCALE <br />Fence Post (By Others) <br />Chain Link > <br />Embedded in Sleeve, <br />Fencej <br />1" Min. Clearance Each Side <br />or Guardrail > <br />of Post <br />6' <br />As Required > <br />Max. <br />Max. <br />5' Min. Setback <br />10 <br />To Face of Top Block <br />� <br />I � <br />F 2'-6 <br />Min. <br />m <br />H <br />Wall Height <br />24" Min.* <br />`Embedment shall be 24" minimum <br />for sloped toe condition. , <br />—' 12" Mina <br />I I <br />IT <br />Geogrid Length <br />(See Geogrid Schedule) <br />III <br />AL <br />III <br />Geogrid Layer 2 <br />Aa <br />° <br />Reinforced <br />2.67' Soil > <br />— Retained <br />(bPJ °°a <br />(See Materials <br />Soils <br />— <br />ill_U1 7 Note F) <br />Drainage Blanket <br />!�----a—�--- Geocd Lpxeer 1- o _ <br />(As Necessary per <br />------ °s> <br />Geotechnical Engineer) <br />!I 111 1 I 18" of Well Compacted a° <br />Geogrid Reinforcement <br />Face Gravel (See Materials o <br />(See Geogrid Schedule) <br />aYNoteE)_^ <br />'must be placed during orr immediately NOTE: Geotechnical Engineer shall <br />NOTE: Wall Toe l ;:'y 4" Perforated Drainpipe evaluate the need for Supplementary <br />immediately <br />after Wall Construction.-.,., .,.... III Surround with 1 of of Drainage behind the Reinforcement <br />III = = Washed Rock per lineal foot Zone during Construction. <br />�C J� of Pipe <br />2" - 4" Leveling Pad \ / <br />(See Materials Note G) Competent Subgrade <br />(Geotechnical Engineer to Confirm) <br />TYPICAL WALL SECTION <br />NOT - TO - SCALE <br />NOTE: Wall Alignment and Heights To Be <br />Established By Contractor / Surveyor. <br />GEOGRID SCHEDULE <br />o� <br />� r r <br />000vaaaava <br />o� <br />r r r <br />0000aaaava <br />o <br />r r <br />r r <br />0000aaaaaa <br />m® <br />r r <br />00000aaaaa <br />m� <br />r r <br />00000aaava <br />GEOGRID: A = Miragrid 5XT <br />B = Miragrid 7XT <br />C = Miragrid 10XT <br />ea � <br />- /III II <br />•' VIEW <br />SIDE VIEW <br />ao t�s° <br />so <br />0�I <br />REINFORCEMENT BAR <br />BENDING DETAIL <br />PICTOF <br />NOTES: <br />1. Installation to be completed in accordance with manufacturer's <br />specifications. <br />2. Do not scale from drawings. <br />LOCK & LOAD COUNTERFORT <br />NOT -TO -SCALE <br />FRONT VIEW ou6inaof <br />Connecting Loop <br />TOP VIEW <br />Poly Fiber Reinforced <br />1 1/2" fiber (4#/yd.) <br />6,000 psi concrete <br />Casting Tolerance SIDE A <br />NOTES <br />1. Installation to be completed in accordance with manufacturers <br />specifications. <br />2. Do not scale from drawings. <br />LOCK & LOAD PANEL <br />NOT - TO - SCALE <br />—I t.s• I_ <br />to <br />a) <br />0 <br />.. <br />LLI <br />C' <br />V) Q <br />O) .0 <br />Q) <br />0 co <br />Z <br />�0CID <br />0 w <br />V <br />06 <br />_Y <br />U <br />O <br />J <br />N <br />0 <br />� x <br />m <br />Z m d <br />m <br />a ❑ p U <br />Sheet No. <br />W1 <br />