The URL can be used to link to this page

Home My WebLink About2018-10-02 Palmer Station - Retaining Wall @ End of Cul-de-Sac - Approved PlanStantec ConsuNing Services Inc. 2335 Highway 36 West ® Stantec St. Paul MN 55113 October 2, 2018 File: 193800151 Attention: Mr. Eric Johnson, City Administrator City of Oak Park Heights 14168 Oak Park Blvd. N., P.O. Box 2007 Oak Park Heights, MN 55082-2007 Reference: Palmer Station Retaining Wall Resubmittal Review Dear Eric, We have reviewed the resubmitted drawings for the Palmer Station development retaining wall, received 9-28-2018. Items 4-6 of the previous review memo, dated 9-21-2018, have been satisfactorily addressed. Recall that there is to be an onsite Geotech during the excavation and backfill periods. The Geotech will need to verify the existing subgrade is suitable, watch the placement and compaction of the aggregate base, and then verify the quality and compaction of the retained backfill. If separate inspection of the wail has not yet been addressed, the Geotech scope of work is often expanded to include general conformance with construction documents. Regards, Stantec Consulting Services Inc. Lee M. Mann, PE City Engineer Phone: 651-604-4850 Lee.mann@stantec.com c. file Andy Kegley Julie Hultman Stantec Consulting Services Inc. 2335 Highway 36 West Stantec St. Paul MN 55113 September 21, 2018 File: 193800151 Attention: Mr. Eric Johnson, City Administrator City of Oak Park Heights 14168 Oak Park Blvd. N., P.O. Box 2007 Oak Park Heights, MN 55082-2007 Reference: Palmer Station Retaining Wall Review Dear Eric, We have reviewed the plans and calculations for the Palmer Station development retaining wall, received 9- 20-2018. Following are comments and recommendations from our structural engineer, Brian Bellemare, PE, SE. Items 4-6 will need to be addressed on the plans and calculations and resubmitted. 1. This is a small block, dry cast wall. We specify and approve both types of block (small block, dry cast and large block, wet cast). The small blocks are easier to work with but have less compressive strength and are more porous than the big blocks. 2. The calculation package looks good. The design follows the required NCMA guidelines. The assumed loads and safety factors are appropriate. 3. There is no geotechnical information. The designer has made assumptions based on previous experience in Oak Park Heights. This will require an onsite Geotech during the excavation and backfill periods. The Geotech will need to verify the existing subgrade is suitable, watch the placement and compaction of the aggregate base and then verify the quality and compaction of the retained backfill. 4. Detail 11/W2: Behind the top of the wall, there should be a layer of impervious material (clay, asphalt, etc) to reduce water infiltration. This is key when using the small, porous blocks. Also, there should be a small Swale at the top to prevent runoff from going over the top of the wall. 5. They show details for drain tile but not where it is routed or how it daylights. I would expect the draintile to be placed behind the first course of block above grade and slope down to the center of the wall, where it can then stub through the wall. 6. The plan calls for a "42" High Black Vinyl Coated Chain Link Fence on Top of Wall". If the intent is to attach directly to the top of wall, then they should provide a detail. Also, the calculations would need to be updated to account for sliding and overturning due to a load pushing on the fence. Alternatively, they could grout the fence posts behind the wall to reduce the impact on the wall design. Regards, Stantec Consulting Services Inc. Lee M. Mann, PE City Engineer Phone: 651-604-4850 Lee.mann@stantec.com c. file Andy Kegley Julie Hultman :9 TV 958.50 TV 958.50 TSTA 0+o0V TO - ±STA 1+10 957 L 956 ro,D 3NT - I35n v BOB OR MIRALMID 3XT - MIT 11 953 Br TR 932dd�'d3 JIRR['Iyi�1QL,y rx,0 3%T - 1358 a 951 R jtlb�lll�] Anu 9S0 j ], $ m RID 3NT - I G+ 949 T Tilialtl i INS II -- L_1,1_5L MTRnrc,D 3%T - )Ban P+ 94JiBgap 25�. t__—_ Rm vvr - ,9 sn_ fi� }L T 9 p"" --Z•- nr� e. 946 T 8 L __________ 913 T T� �-ipB 946.15 TOB 946.25 TDB 946,7 JOB 94725 9i]''S 94JPY T➢B 946.25 .. W. NN TOO 945.75 6 10 1 0Pn0NAL II 1114•\ / FIELDyLR TOPVIEW ISORTIRII 0•BATIERFEWCHAM1MEL IDb°BATFER RRW LXANNEI T 6• 1 FACE VIEW SNEVIEW \STERLING® I L. \ISOMETRIC BLOCK VIEWS W2 (NOT TO SCALE) LNI P117SW CHANNEL 106°BAITIERSRW CHA I. PLACE UPPER BLOCK APPROXIMATELY I. 125• REINFORCED. BACKFILL AND BEHINDLOWERBI-00( I. SNSTALLPPSMTSB]SIDEGRO%FEOFUPPER STEP 3 -PLACE REINFORCEMENT — BLCCEENQURMOIHATTIEV ENTER THERPAR flEN P.... OE CBAHNELONTHELOWERBUO 3. PUSH UPPER UL FORWARDTOACDEVE UNI XPWGM fAEF PROPER 10.6°SRBACK STERLING® 3 PIN LOCATION VZ INOTTO SCALE) REMFORCEMENTLENGTHE) PRINTED .-C-DO.], rSTERLING® 4 1:1 EXCAVATION OVERSIZING W2 (SCALE: 3/B`zl-C`I L 1.1NI, I'll DID N. C2[ y r. STERLING - ELEVATION VIEW WALL 1 (MAXIMUM BEARING PRESSURE = 1°700 PSF) W 2 ISCALE: TV 958.50 g + T \STER LINGO / I3 IOAYLIGHT DRAINTILE THROUGH WALL STERLING® WZ (9 OTTO SCALE) 5 TYPICAL BASE PREPARATION lEE rJ THE AREAS THAT ARE NOT STEP I-PIACETU OVORCEMINT REINFORCED. BACKFILL AND BOU71V ORNDOVERLAP COMPACT THAT COURSE. OCCUBEINTHERAOILSAREA. IF STEP 3 -PLACE REINFORCEMENT — lu Mnfs) flEN P.... OE INCHES OF SANDBETWEENIHE MARKS SHOW GAPS IN THE REINFO&CEMEM DYERS. UNI XPWGM fAEF .Q GECWI X STEP 2- LAY THE NEXT COURSE DRUX MfB f--t--L 1NRpXM WN1 1 951 DAVWM DPNN TILE X DN�iI` MW W.I. 949 I 9W Tyx - INDICATES LOCATION OF SECTION CUT CWPSE ABJYE GRaLE ..IE'NE SBLMO MW E ABDK D., 945 QST CWPSE BELDw CPPD[ 1) LOCATION OF CURVE SHOWN IS APPROXIMATE AND 5( VEA, SHOULD BE VERIFIED IN THE FIELD PRIOR TO j DING CONSTRUCTION OF THE SEGMENTAL RETAINING WALL. \STER LINGO / I3 IOAYLIGHT DRAINTILE THROUGH WALL STERLING® WZ (9 OTTO SCALE) 5 TYPICAL BASE PREPARATION W2 IN OT TO SCALE) rJ THE AREAS THAT ARE NOT STEP I-PIACETU OVORCEMINT REINFORCED. BACKFILL AND BOU71V ORNDOVERLAP COMPACT THAT COURSE. OCCUBEINTHERAOILSAREA. IF STEP 3 -PLACE REINFORCEMENT — O V EMAP OCNRS, PLACE 3 TO 3 IN THE AREAS WHERE THE INCHES OF SANDBETWEENIHE MARKS SHOW GAPS IN THE REINFO&CEMEM DYERS. .Al. SqL B' uWiW4 CpMnCTED .Q GECWI A.lA Z EAU. PSD STEP 2- LAY THE NEXT COURSE 5TE R LI N GO TYPICAL STEP-UP DETAIL W 2 INOT TO SCALE) wlLu E%TENDGEOSYNTUGNCREMFORCLMENT TO WITIR4I.OF T11EIgWER BLCCRFACf� �"STE RLINGO '/ 1REI N FORCEMENT CONNECTION t/, NOT TO SCALE) No I. \t iiyVNOiiop� OP BLOCK. MAKE A MARK ON THE BACK OF THE BLOCKS IN rJ THE AREAS THAT ARE NOT LEGEND REINFORCED. BACKFILL AND COMPACT THAT COURSE. STEP 3 -PLACE REINFORCEMENT — IN THE AREAS WHERE THE MARKS SHOW GAPS IN THE Pa1NEIPtE LOWER REINFORCEMENT .Q GECWI PATTERN. CONTINUE NORMAL maEcrloN WALL CONSTRUCTION, REPEATING THESE STEPS AS f--t--L NEEDED 1 2'TO3'OFmR T t ��STERLINGS OUTSIDE RADIUS W2 (NOT TO SCALE) U U Ms1oEEuavE 6AW NTAS COHSRU, TOP l ONSTRCI' '- MET% ERREE MITERED oRN a v SPLR PACE AND END WALL PACE 1. ALWAYSSTARTCAPPMGWALLMOMTHELOWE n6VATION. ). LAYOUTCAPSPRIORTOUSMGADHESIVE 3.CUTCAPQTOM.. VARIOUSMMMAUWSOFWVGANDSHORTCAPFACES WDI BENECESSARYPGR Rgpp GpFATG'[HAH THQMMIMUM. 4. ALTERNATESHORTAND3 GCAPFACESEVUIMO ERGPTOACHIEVEA STRAIGHT ROW OF CAPS, 5. USE E%TFRIORLRADE CONSTRUCTION ADHESIVE TO SWORE WE 1 TODIAMONDS CAP BLOCK DESIGN DETAILS W2 (NOT TO SCALE) STERLING® 11 TYPICAL CROSS SECTION WZ (SCALE: 3/B`=1' -O`) @e, 2 0 F Q f m w W I J a L9 Z N Q p D W2 1 2 WALL ELEVATIONS rJ m LEGEND 956 pg 6752599381 - INDICATES REINFORCEMENT LENGTH ANO/OR ELEVATION CHANGE 953 x - DETAIL NUMBER 951 WX - SHEET NUMBER 950 949 9W Tyx - INDICATES LOCATION OF SECTION CUT 947 946 945 NOTES: 1) LOCATION OF CURVE SHOWN IS APPROXIMATE AND sq SHOULD BE VERIFIED IN THE FIELD PRIOR TO j CONSTRUCTION OF THE SEGMENTAL RETAINING WALL. TE - ,W DF EA. U U Ms1oEEuavE 6AW NTAS COHSRU, TOP l ONSTRCI' '- MET% ERREE MITERED oRN a v SPLR PACE AND END WALL PACE 1. ALWAYSSTARTCAPPMGWALLMOMTHELOWE n6VATION. ). LAYOUTCAPSPRIORTOUSMGADHESIVE 3.CUTCAPQTOM.. VARIOUSMMMAUWSOFWVGANDSHORTCAPFACES WDI BENECESSARYPGR Rgpp GpFATG'[HAH THQMMIMUM. 4. ALTERNATESHORTAND3 GCAPFACESEVUIMO ERGPTOACHIEVEA STRAIGHT ROW OF CAPS, 5. USE E%TFRIORLRADE CONSTRUCTION ADHESIVE TO SWORE WE 1 TODIAMONDS CAP BLOCK DESIGN DETAILS W2 (NOT TO SCALE) STERLING® 11 TYPICAL CROSS SECTION WZ (SCALE: 3/B`=1' -O`) @e, 2 0 F Q f m w W I J a L9 Z N Q p D W2 1 2 WALL ELEVATIONS