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1811 Ellie Ct - Retaining WallRev DRAIN TILE BY OTHERS COMPACT NATIVE OR FILL SOILS @ BASE 2' -0" MIN. 4' -0" Date Designed By: Ryan Mack BURY FIRST BLOCK ROW MIN. SECTION NOTES 1. FOR LOWER HEIGHT PORTIONS OF WALL, TOP COURSES OF BLOCK AND GEOGRID MAY BE OMITTED SO THAT NO MORE THAN THREE BLOCK COURSES ARE PRESENT ABOVE TOP LAYER OF GEOGRID. 2. RETAINING WALL DOES NOT REQUIRE GEOGRID FOR AN EXPOSED HEIGHT OF 3' -0 OR LESS. 3. UPPER GEOGRID LENGTH MAY BE 3' -6" WHEN BUTT UP TO GARAGE FOUNDATION. OPTIONAL 4" CAP BLOCK GEOGRID REINFORCED RETAINING WALL Retaining Wall 1811 Ellie Ct Eagan, MN Project: Endres Custom Homes 11732 Independence Way Woodbury, MN 55129 Client: 6" MIN. COMPACTED GRANULAR BASE WALL SECTION -FREE DRAINING AGGREGATE (MIN. 1' -0" WIDTH) COMPACTED FILL BY: GTIONS C I hereby certify that this plan. specification or report was prepared by me or under my direct supervision and that 1 am a duly Licensed Professional Engineer under the laws of the State of Minnesota. Date: 9 -20-11 License Number: 45470 Signed: Print Name: r ri`• Trevor Amer Project Number: 11.01088 S 'G) Drawing Date: September 20, 2011 Sheet: 2 of 2 6201 East River Rd Suite 308 Minneapolis. MN 55421 Td 763 -571 -2500 Fax 763-571 -1168 ww.ultelg.com © COPYRIGHT ULTEIG ENGINEERS INC. 2011 is(( t.6„ GEOGRID GEOSYNTHETIC REINFORCEMENT TYP. (MIRAGRID 3XT OR EQUIV.) Opedvr014 Ta p / r'A EAGAN 98.7650 REVIEW G VISION Rev SCOPE DESIGN AND DETAILING OF A MODULAR BLOCK RETAINING WALL. ALL CONSTRUCTION IS TO BE DONE IN ACCORDANCE WITH THIS DOCUMENT, STANDARD INDUSTRY PRACTICE, AND THE REQUIREMENTS OF THE CODE. NOTES 1. THE BASE OF THE RETAINING WALL IS TO BE BURIED INTO VIRGIN MATERIAL OR ENGINEERED FILL AS DETAILED ALONG THE ENTIRE LENGTH OF THE WALL. 2. CONSTRUCT THE RETAINING WALL WITH STAGGERED ROWS OF LANDSCAPE BLOCKS. DO NOT STACK ONE BLOCK DIRECTLY ABOVE THE BLOCK BELOW. 3. DRAINAGE FILL IS TO BE CLEAN 1" MINUS CRUSHED STONE OR GRANULAR FILL THAT MEETS THE SEGMENTAL UNIT MANUFACTURER'S SPECIFICATIONS. 4. INSTALL DRAINTILE AT THE BASE OF THE WALL. DRAINTILE IS TO DRAIN TO DAYLIGHT AT EACH END OF THE WALL AND INTERMEDIATELY AS REQUIRED BY OTHERS. DRAINTILE AND DRAINAGE ARE ESSENTIAL TO KEEP THE WATER PRESSURE AND EARTH PRESSURE REDUCED BEHIND THE WALL. 5. FOLLOW ALL INSTALLATION INSTRUCTIONS PER BOTH THE BLOCK AND GEOSYNTHETIC REINFORCEMENT MANUFACTURERS. ENSURE REINFORCEMENT GRID TEXTILE IS ORIENTATED IN CORRECT DIRECTION. 6. WALL LAYOUT, PROPERTY BOUNDARIES, GRADING, EXCAVATION, OVERALL SLOPE STABILITY, AND DRAINAGE IS BY OTHERS. MATERIALS SEGMENTAL BLOCK UNITS: GEOGRID GEOSYNTHETIC REINFORCEMENT: SOIL ON SITE: ALLOWABLE SOIL BEARING CAPACITY: CODES 2007 MINNESOTA STATE w/ AMENDED 2006 IRC SAFETY FACTORS: Date Designed By: Ryan Mack CLIFTON 8" BLOCK MIRAGRID 3XT OR EQUIV. SAND (DESIGN = 34 °) 2000 PSF BUILDING CODE SLIDING -1.5 OVERTURNING - 1.5 BEARING - 3.0 Retaining Wall 1811 Ellie Ct Eagan, MN P Endres Custom Homes 11732 Independence Way Woodbury, MN 55129 I hereby certify that this plan, specification or report was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the taws of the State of Minnesota. Date: 9-20 -1 1 License Number: 45470 Signed: Print Name: r Y) r". Trevor Akner Project Number: 11.01088 Drawing Date: September 20. 2011 Client: Sheet: 1 of 2 si 5201 East River Rd Suite 308 Minneapolis. MN 55621 Tel 763-571-2.500 Fax 763. 571 -1168 www.ullaig.com © COPYRIGHT ULTEIG ENGINEERS INC. 2011 9/20/11 To whom it may concern, Due to a misunderstanding, the retaining walls at 1811 Ellie Ct, Eagan MN did not get inspected by the city inspectors. Attached to this affidavit is the engineering scope for the installed retaining walls. If there are any questions please feel free to contact me. Thank' you, es WWW.ENDRESCUSTOMHOMES.COM ENDRES CUSTOM HOMES, INC. 15690 DUCK POND WAY APPLE VALLEY, MN 55124 P: 612- 221 -2215 F: 651-344-4337 DENDRES @ENDRESCUSTOMHOMES.COM BUILDER #20494675 Gravity Wall Design Assumptions. The design methodology for conventional gravity walls is based upon the following: 1. There is no slope behind the wall. 2. Surcharge Toads applied at the top of the wall are limited to foot traffic where the applied forces will be between 0 -50 psf. 3. There is good surface and subsurface drainage to prevent hydrostatic pressures at the back of the wall fascia and the reinforced soil zone. 4. The site soil has adequate strength to support the wall and good draining soils will be used behind the wall. In addition, the ground water table is assumed to be well below the reinforced zone. 5. The cubic foot weight of the soil is the moist unit weight that includes the weight of water occurring naturally in the soil.. 6. Seismic loading is not considered. 7. The site can support the weight of the wall. 8. The foundation soil will not settle or deform to cause failure. 9. Keep in mind, conventional segmental retaining walls are generally effective as gravity structures for most non - critical wall applications under 4 feet high, including the block below grade. For walls exposed 3 feet or more, you must terrace the wall or use geogrid to reinforce the soil. Consult a professional engineer for design assistance on taller walls. Basic Wall Installation - Gravity Walls Segmental Retaining Walls that rely on their own weight, core fill, friction between units and setback are called gravity walls. Conventional segmental retaining walls are generally effective as gravity structures for most non - critical wall applications. Don't assume shorter walls never require the services of a soils engineer. The heights listed by the manufacturer are used as a rule of thumb when ideal wall conditions are present. Walls that exceed the heights listed by the manufacturer require additional construction techniques such as terracing or the use of geogrid reinforcement. These types of walls are known as reinforced or engineered wall structures. They are also referred to as Mechanically Stabilized Earth (MSE) walls. The performance and construction of most retaining walls is highly dependent on the type and condition of the on -site soils and the contractor's placement and compaction of the soils behind and under the walls. It is important to know the properties of various types of soils and understand how they might affect your estimate. To get a better understanding about soils, a brief review of soil types and properties is shown on the following page. 5 Soils are divided into three groups: Granular - sands and gravel consisting of grains down to .002" - Best for strength and support Please note: Clay - very fine particles, > 50% passing #200 sieve -May cause settlement Organic loam, peat that is made up of moss, leaves and vegetable matter, and topsoil - Should be removed If you are unsure of your soil condition, consult a soils engineer. Step 1 - Base Course Preparation Beginning at a point of the wall's lowest elevation, excavate a trench down the length of the wall that will accommodate at least 6" of compacted base material. We suggest burying 10% of your wall height below grade with a minimum of 6 inches even on short walls. Step the trench up or down with respect to adjacent grade. The width of the trench for both the Denver and Clifton Walls should be a minimum of 24 ". Based on the type of application and what is retained, the depth of the leveling pad may vary. If necessary, consult with an engineer. After excavating the native soil and prior to adding base material, remove loose material from the trench and compact. 6" Min. Base Fill Thickness Upper Grade 12" Min. Backfill SRW Block 24" Min. Base Fill Width 24" x 6" Min. Compacted Granular -Base Leveling Pad Lower Grade 6" Min. Block $ Embedment Leving Pad Trench 24" x 6" Min. Compacted Granular -Base Leveling Pad 6" Min. Base Fill Thickness Native Soil Oversize Area Step 2 Leveling Pad Installation Place a minimum of 6" of compacted base material and compact to 95% Standard Proctor density. Verify that the base is level with a transit or hand level. Be aware that the base material (commonly referred to as road base or base aggregate) will vary from region to region. The base material should consist of crushed material: 3/4" crushed concrete with fines or 3/4" crushed rock or limestone with fines. Your material must be angular, nothing round. Round rock will act like bail bearings and roll when under pressure, causing the wall to bow or collapse. Step 3 - Base Course Installation The base course will consist of one layer of block. Base units will have the rear lip removed before placing on the leveling pad. Use a string line behind the tail of the block for alignment on straight wall applications. All blocks should rest firmly on the pad and be centered to allow 6" of base material in front and 6" behind the base block. Level each block, side -to -side, front -to- back and across three full blocks with a hand level. A rubber mallet may be used to level and align the blocks. Step 4 - Core and Drainage Fill Place 3/4" to 1" clean aggregate (crushed rock) within the cores and a minimum of 12" behind the blocks. This creates a drainage zone and the stone columns that help to unify and maximize the performance of the wall. In addition, sock wrapped perforated drainpipe can be installed at the desired level behind the wall (usually behind the first block above grade). The perforated drainpipe should have adequate slope to drain water in the right direction towards each drainpipe outlet. Drainpipe outlets are usually installed every 30 to 50 ft. 7 8 Step 5 - Successive Course Installation Prior to adding successive courses, the top of each block needs to be clean and free of foreign material. Center the block and pull it forward until the rear lip abuts the two blocks below it. Place core and drainage fill as in Step 4. Place the backfill material behind the drainage rock in maximum 3" to 6" lifts based on . the rating of your compaction equipment and compact to 95% Standard Proctor Density. Repeat this process for each successive course. Large compaction or construction equipment should be kept a minimum of 3' from the back of the wall. This 3' area should be compacted with a vibratory plate compactor. Step 6.1 - Stepping a Wall When building your wall with the Clifton, a Corner Block in conjunction with a Step /Cap may be used to end a course that steps -up. Step 6.2 - Add Step /Caps to Finish the Top of Your Walls Step 6.3 - Stepping a Wall /Another Option Another option for walls that step -up is to cut to fit a 6" wide section of a Step /Cap for the Denver or an 8" wide section of a Step /Cap for the Clifton and lay the Step /Cap vertically to finish the end. To ensure the vertical cap maintains a straight line from the face to the back of the block, a 2" chip is installed near the back of the block (see illustration below). Step /Cap Block cut to 6" or 8" Step 7 - Capping a Curved Wall The Step /Cap is rectangular in shape and is perfect for straight walls. For radius turns, the Step/ Cap will need to be saw cut to fit. To ensure permanent placement of the caps on top of the wall, a quality exterior concrete adhesive should be used. Place the Cap Block and measure the distance of the gap between the caps. Using this measurement, cut the cap so that it is parallel with the adjacent cap unit. Slide the cap in place so that it is flush with the adjacent cap unit. Adhere caps with concrete adhesive. Step 8 - Special Applications While the installation steps presented are applicable to most basic wall designs, special consideration needs to be given to those applications in which a slope, surcharge loading and /or less than ideal soils are present. These types of applications may require geosynthetic reinforce- ment or other engineering design support. Such applications include but are not limited to: • Wall Height • Water Applications • Drainage • Fences and Guardrails • Driveways and Roads • Structures • Tiered Walls • Bridges and Culverts Please refer to the geogrid reinforced wall sections of this guide for more information in regard to the incorporation of geosynthetic reinforcement in wall design. 9 Tiered Denver and Clifton Walls offer a visually pleasing and less obtrusive alternative to conventional wall construction. On sites that provide sufficient land area for this application, these walls are typically designed with green space between the tiers. Walls perform independently and may not need engineering when the distance between gravity walls is at least two times the height of the lower wall, and the height of the upper wall is equal to or less than the height of the lower wall (known as the 2 to 1 rule). Walls that must be evaluated by an engineer are any walls needing geogrid reinforcement. These include, walls closer than two times the height of the lower wall, walls with more than two terraces and terraced walls with any structures above. Terraced walls that do not perform independently based on the 2 to 1 rule listed above must also be evaluated for global stability, and the lower wall must be designed to resist the load of the upper wall. Finished Grade Cap Block Clifton Block 6 6" —24 Cap Block Clifton Block Varies x Cap Block Clifton Block' 6 12" of Free Draining Aggregate Other Layers j 2nd Layer j 1st Layer " o Drain Tile (Elev. Varies) 6" Minimum Compacted Granular -Base Leveling Pad f 17 18 All installation instructions are the same as for gravity retaining walls except for the addition of geogrid. Geosynthetic reinforcement is an engineered product that is typically comprised of polypropylene, polyester or other high tensile material. Used in conjunction with segmental retaining wall blocks, it helps stabilize the soil mass behind a wall. Depending on the wall design, the length and the number of grid layers will vary. Please remember, plasticized snow fencing is not a high tensile material and should not be used in place of geogrid. Generally, stronger geogrids must be rolled out perpendicular to the retaining wall. As it is unrolled, it is in the same direction that it should be installed. Bi- directional grids are the same strength in both directions and can be rolled out parallel to the retaining wall or perpendicular to the retaining wall. If the geogrid depths are the same as the roll width, it may be more efficient to roll out the geogrid parallel to the retaining wall. If the geogrid depths called for are different than the roll width or if the wall curves, it is best to roll out the geogrid perpendicular to the retaining wall. Finished Grade Cap Block \ \, Geosynthetic j \ \ / / \ \ / / \\ Reinforcement \ Oth L ayere �� \\ ,\\ ,\\ ,\\ ,\ \,\\ ,\ \ / /\\ \\ 12" of Free Draining Aggregate IMOOM eghtsee ieeltief 01,4h elldlei eieatktsiielt 1 4! •�ts®\®®A® faAeog ittigovi ®x.,181:4* ieel Clifton Block 6" 24" %?fd a %/ // /\ / //f 4 "o Drain Tile (Elev. Varies) . \1 s La er \ \ \ Z ? `7j /// 6" Minimum Compacted Granular -Base Leveling Pad Basic Geogrid Reinforcement Step 1 - Preparation for Grid The area behind the wall on the grid layer needs to be level with the top of the block (after compaction) and compacted to 95% of the Standard Proctor density (ASTM D698). Step 2 - Grid Placement Place the grid as close to the face of the wall without exposing it after successive placement of blocks. Ensure the grid is placed with the strength direction perpendicular to the wall. Remember, bi-directional grids are the same strength in both directions and can be rolled out parallel on straight walls. Check grid manufacturer specifications for proper grid placement instructions. Step 3 - Preparation for Backfill Place the next course of block. Pull the grid back and stake it so it is taut and free of wrinkles. Step 4 - Backfill and Compact Place 3/4" to 1" clean aggregate (crushed rock) within the cores and a minimum of 12" behind the blocks. Also, place and compact backfill on the grid in lifts no greater than 3 to 6 inches at a time depending on the rating of your compaction equipment. When possible, it is recommended that the backfill be deposited directly behind the wall and pushed to the end of the grid to ensure that it remains taut and wrinkle-free. Step 5 — Install Additional Courses Repeat steps 2, 3 & 4 to complete wall to height required, installing additional layers of grid where needed 19 20 Step 1 - Grid Placement Cut geogrid to required lengths and place the grid as close to the face of the wall without exposing it when following the contour of the curve. Place the next course of SRW block, taking care that the grid sits flat and is secured between the units. Each geogrid length should be laid perpendicular to the wall face and pulled tight to remove any slack. The geogrid should never overlap on top of the Clifton or Denver Units. Behind the Clifton or Denver Units, the geogrid will overlap because of the convex curve. In these areas place 3 inches of fill material to separate. Never compact directly on the geogrid. Step 2 - Successive Grid Layers Repeat step 1 when installing additional layers of grid. Fill cores and the drainage zone with aggregate material on every course. Place the next layer of infill soil on top of the geogrid by beginning near the wall fascia and spreading it back across the grid. Backfill in 3" - 6" lifts, using only vibratory plate compactors within a 3' area from the back of the wall. Place soil in the rest of the infill area in maximum lifts of 6" based on the rating of your compaction equipment and compact to obtain a 95% Standard Proctor density. Step 1 - Grid Placement Cut geogrid to required lengths and place the grid as close to the face of the wall without exposing it when following the contour of the curve. Place the next course of SRW block, taking care that the grid sits flat and is secured between the units. Each geogrid length should be laid perpendicular to the wall face and pulled tight to remove any slack. The geogrid should never overlap on top of the Clifton or Denver Units. Step 2 - Successive Grid Layers After the next course of block is placed, lay the grid to cover the area of non - reinforced soil below. This will ensure 100% coverage. Place the next layer of infill soil on top of the geogrid by beginning near the wall fascia and spreading it back across the grid. Backfill in 3" - 6" lifts, using only vibratory plate compactors within a 3' area from the back of the wall. Place soil in the rest of the infill area in maximum lifts of 6" based on the rating of your compaction equipment and compact to obtain a 95% Standard Proctor density. Repeat these steps for successive specified grid layers. 21 Geogrid - Outside 90° Corner 22 Step 1 - Grid Placement On an outside 90° corner, it is important that grid layers do not overlap at the corner. Place the first grid layer at the correct elevation and Length. Each geogrid length should be perpendicular to the wall face. Lay the first geogrid corner section perpendicular to one side of the corner. Lay the second geogrid section perpendicular to the other side of the corner but not overlapping the first geogrid section. Step 2 - Successive Grid Layers In the corner and on the next course of blocks, place a layer of grid perpendicular to the previous layer of grid. Repeat these steps for successive specified grid layers. Step 1 - Grid Placement Each geogrid length should be laid perpendicular to the wall face. Extend the grid past one edge of the wall by a minimum of 2 feet. Along the other edge, place the grid perpendicular to the corner, but don't allow the grid to overlap. Step 2 - Successive Grid Layers At the next designed grid layer, alternate the edge on which the grid is extended a minimum of 2 feet past the corner. Repeat these steps for successive specified grid layers. Geogrid - Inside 90° Corner ;e TENCATE, INSTALLATION GUIDELINES GEOSYNTHETIC REINFORCED MODULAR BLOCK RETAINING WALLS Prepared by: TenCate Geosynthetics North America 365 South Holland Drive Pendergrass, GA 30567 Tel. (706) 693 — 2226 Fax (706) 693 — 2044 www.tencate.com May 18, 2010 General TENCATE Mirafi® N?TENCATE TM INSTALLATION GUIDELINES This document is prepared to help ensure that the geosynthetic reinforcement, once installed into a modular block retaining wall system, will perform its intended design function. To do so, the geosynthetic must be identified, handled, stored, and installed in such a way that its physical property values are not affected and that the design conditions are ultimately met as intended. Material Identification, Storage and Handling The geosynthetic will be rolled on cores having strength sufficient to avoid collapse or other damage from normal use. Each roll will be wrapped with plastic covering to protect the geosynthetic from damage during shipping and handling, and will be identified with a durable gummed label, or the equivalent, clearly readable on the outside of the wrapping for the roll. The label will show the manufacturer's name, the style number, and the roll number. While unloading or transferring the geosynthetic from one location to another, prevent damage to the wrapping, core, label, or the geosynthetic itself. If the geosynthetic is to be stored for an extended period of time, the geosynthetic should be located and placed in a manner that ensures the integrity of the wrapping, core, and label as well as the physical properties of the geosynthetic. This can be accomplished by elevating the geosynthetic off the ground, laying flat or standing on end while ensuring that it is adequately covered and protected from ultraviolet radiation including sunlight, chemicals that are strong acids or strong bases, fire or flames including welding sparks, temperatures in excess of 70 °C(160 °), and human or animal destruction. Foundation Soil /Subqrade Preparation The foundation soil /subgrade should be excavated to the lines and grades as shown on the construction drawings or as directed by the Engineer. Over - excavated areas should be filled with compacted backfill material. The foundation soil /subgrade should be proofrolled prior to backfill and geosynthetic placement. This exercise should be performed prior to each subsequent geosynthetic layer installed. The soil fill shall be compacted to 95% of optimum dry to AASHTO T99. It is recommended that cohesive soils be compacted in six (6) to eight (8) inch compacted lifts and granular soil in nine (9) to twelve (12) inch compacted lifts. Geosvnthetic Installation Before unrolling the geosynthetic, verify the roll identification, length, installation orientation and the installation location with the construction drawings. While unrolling the geosynthetic, inspect it for damage or defects. Damage that occurs during storage handling or installation shall be repaired as directed by the Engineer. The geosynthetic should be laid at the proper elevation and orientation on the construction drawings and as specified by the wall facia manufacturer, or as directed by the Engineer. Correct orientation of the geosynthetic is of extreme importance and shall be verified by the Contractor. The geosynthetic shall be cut to length as shown on the construction drawings using a razor knife, scissors, sharp knife, or equivalent. 2 , , TENCATE Mirafi® w mow' 4,1144q44,444. -„, 0 13 Z" (b .., — cr z•-, cb 0 Z" E 0 (I) Cl. ."'+' •-t- 9 co .11 0 I (/) 0 0 C CD O ,4-• Z < 0. 0 cr: _c St. 0' co—. O u) • II :30 III Q. -4 . 0 CD to < (71 r (t) O Z CT 0 0 0 C z 1 1 Ei z Q. (0 a`" o 0 (A 0 0 O 0 , " 0 --...