Approved Plans OPW21-0250

 

‘SLOPE TO PREVENT PONDING AT FRONT OF

WALL

ALL WALLS OVER 1.0m TO HAVE TEMPORARY SAFETY.

 

‘SURCHARGE TO BE LIMITED TO PEDESTRIAN
TRAFFIC WITHIN 'H’ DISTANCE FROM BACK OF WALL
5° MAX, SLOPE TO PREVENT PONDING BEHIND WALL,
‘SLOPE NOT TO BE INCREASED UNLESS OTF

 

 

 

 

 

 

 

   

 

5
i GEOFABRIC TO 8E FOLDED OVER GRANULAR BACKFILL
z| |___— PROVIDE 75mm-150mm NOM. NO FINES CRUSHED ROCK TO REAR
eS Cal
3 iS}
7 CI
_\ |

BROUGHT TO SURFACE AT HIGHEST
END AND CAPPED OFF.

05 eH" MIN

STIFF TO HARD CLAY OR MEDIUM DENSE SANDS. MINIMUM

SAFE BEARING CAPACITY AT BASE TO BE 100 KPa OR

150KP2 WHERE WALLS EXCEED 15m HIGH

SANDSTONE BOULDER WALL DETAIL

 
  
 

 

 

1

NOTES

THE SOIL AT THE FRONT BASE OF THE WALL SHALL BE LEVEL, SOUND NATURAL MATERIAL WITH AN ALLOWABLE
MINIMUM BEARING CAPACITY OF 100 KPa. ANY ALTERATIONS OR EXCAVATIONS TO THE GROUND LEVELS IN FRONT OF
WALL TO BE VERIFIED BY THE ENGINEER PRIOR TO ENSURE THE WORKS WILL NOT AFFECT THE WALL STABILITY.

DESIGN BASED ON A RETAINED AND FOUNDATION SOIL INTERNAL FRICTION OF 25° MINIMUM, A BULK DENSITY OF
S9KN/m?, A Ka OF 0.41 [S* RETAINED SLOPE) AND A K, OF 2.43

 

 

 

   

 

   
  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

 

3. ALL STONE TO GE DENSE UNCRACKED ‘A’ GRADE OR ‘8’ GRADE SAW CUT SANDSTONE ROCK (S00mnW x 500mm H x
1500mm L MINJAPPROVED BY THE ENGINEER. ALTERNATIVE ROCK GRADES MAY BE SUBMITTED TO THE ENGINEER FOR
APPROVAL.
4. NOLARGE VOLUMES OF WATER TO BE PERMITTED TO POND AT ANY LOCATION BEHIND THE WALL
5. TRENCH SPOIL IS NOT TO BE USED TO FILL SERVICE TRENCHES UNDER WALLS. TRENCHES TO BE FILLED TO SURFACE
WITH MINIMUM CBR 15 GRAVEL OR MATERIAL AS DIRECTED.
6 FOOTINGS EXCAVATION TO BE INSPECTED AND APPROVED PRIOR TO WALL CONSTRUCTION,
7. GEOTECHNICAL TESTING - BORELOG SPACINGS TO BE TAKEN AT 20m MAX. SPACINGS AND WHERE WALL TERMINATIONS,
om
8 DYNAMIC CONE PENETROMETER TESTING IN ACCORDANCE WITH AS1289-6.3.2
5. FOUNDING MATERIAL FOR WALLS Hem TO BE 100kP MINIMUM AND 150kP2 WHERE WALLS EXCEED H-15m
10, GEOTECHNICAL ADVICE TO BE REQUESTED WHERE GLOBAL STABILITY ANALYSIS, SETTLEMENT ISSUES OR SITE
CONDITIONS DIFFER FROM THOSE SHOWN IN THE DESIGN.
11, PROVIDE TEMPORARY BARRIER SAFETY FENCE TO TOP OF WALLS OVER 1.0m IN HEIGHT
12. MEASUREMENTS ON CALCULATION SPREADSHEETS PROVIDED TO TAKE PRECEDENCE OVER VALUES SHOWN ON PLAN.
OPW21/0250 21 JAN 2022
crs wR caer NORTH PONT [ome
MAX WATTERSON
+ASSOCIATES VANTRALIA PTY LTD RETAINING WALL DETAIL
xray ang |
8 160-001 GHEGKED POEL Suey anno (ES) Engin pre ere. 2 PEARSONS ROAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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