Exhibit 4 - Retaining Wall Design - Brinker SubstationA TYPICAL MODULAR BLOCK WALL SECTION
Scale: 1/2" = 1'-0"
SETBACK =2 3/16"
(5° BATTER)EXPOSED WALL (HEIGHT VARIES WITH DESIGN)REINFORCED SOIL
(SELECT GRANULAR BACKFILL,
SEE NOTE 'F')
STRATAGRID SG500
GEOGRID SHALL HAVE
FRICTION CONNECTION
WITH BLOCKS AND SHALL
EXTEND FULL LENGTH
BACK INTO REINFORCED
FILL ZONE (TYP)
RETAINED SOIL
10" THICK LAYER OF IMPERVIOUS
CLAY MATERIAL COMPACTED TO
95% STANDARD PROCTOR
1'-0"LEVELINGPADWALL HEIGHT (H) VARIES4'-6"2'-0"MIN.6" PERFERATED PVC UNDERDRAIN
WRAPPED IN FILTER FABRIC, SEE DET. 'E'
COMPACTED 12" CRUSHED
STONE AGG. LEVELING PAD
LENGTH OF GEOGRID (L) (TYP)
FREE DRAINING GRANULAR
BACKFILL, (SEE NOTE 'F')
FILL CORES W/ FREE DRAINING
GRANULAR BACKFILL AS EACH
COARSE IS SET
1'-0"
MIN
FOUNDATION SOIL - SANDSTONE OR SHALE
6 MIN1
START GEOGRID AT
FRONT OF BLOCK
NON-WOVEN GEOTEXTILE FABRIC,
COVER LAP GEOGRID 12" MIN. (TYP)
1'-0"
3'-0"6"1'-0"
VERTI-BLOCK
36" STANDARD
BLOCK (TYP)
TOP OF WALL
WALL STATION
CONTROL LINE
6" CAP BLOCK
CONC. FLUME, SEE DET. 'H'
4'-0"
MIN
(TYP)
4" TOPSOIL & HYDROMULCH
SAFETY RAIL NOT SHOWN
(SEE DETAIL BELOW)3'-10"4'-2" MIN.5"2"1" X 3" TUBULAR STEEL RAIL
3" X 3" TUBULAR
STEEL POST; WITH
FLAT CAP; POSTS AT
8'-0" O.C. MAX
1" X 1" TUBULAR STEEL
PICKETS; 5" O.C. TYPICAL
1" X 3" TUBULAR
STEEL RAIL
TOP OF MODULAR
BLOCK WALL
(SEE RAIL CONNECTION
DETAIL 'D')
NOTES:
1.FENCE PANELS SHALL NOT SLOPE
WITH TOPOGRAPHY. STEP PANELS AT
POSTS SET INTERMEDIATE POSTS AS
NEEDED. MAX. GROUND CLEARANCE IS
8" AT STEP.
2.ALL WELDS SHALL BE GRINDED
SMOOTH BEFORE FINISH.
3.ALL FENCE COMPONENTS SHALL HAVE
A HOT DIPPED GALVANIZED FINISH
PRIOR TO INSTALLATION.
4.ALL FENCE COMPONENTS SHALL BE 12
GA. STEEL.
C SAFETY RAIL FENCE
NOT TO SCALE
D RAIL CONNECTION DETAILS
NOT TO SCALE4'-0"FREE DRAINING
GRANULAR BACKFILL
CONCRETE FILL
SECOND BLOCK VOID
SPACE AT EA. POST
CONCRETE FILL TOP
BLK CELL AT EA. POST
STEEL POST
CORE THROUGH
CAP BLOCK
CONCRETE FILL TOP BLK CELL
AND SECOND BLOCK VOID
SPACE AT EA. POST (TYP)
SQUARE STEEL
POST (TYP)8'-0"
VERTI-BLOCK
36" STANDARD
BLOCK (TYP)
VERTI-BLOCK 36" STANDARD BLOCK
OR HALF-STEP BLOCK (TYP)
VERTI-BLOCK 36"
STANDARD BLOCK
OR HALF-STEP
BLOCK (TYP)
SECTION
PLAN
B TYPICAL MODULAR BLOCK WALL SECTION
Scale: 1/2" = 1'-0"
SETBACK =2 3/16"
(5° BATTER)EXPOSED WALL (HEIGHT VARIES)REINFORCED SOIL
(SELECT GRANULAR BACKFILL,
SEE NOTE 'F')
STRATAGRID SG500
GEOGRID SHALL HAVE
FRICTION CONNECTION
WITH BLOCKS AND SHALL
EXTEND FULL LENGTH
BACK INTO REINFORCED
FILL ZONE (TYP)
RETAINED SOIL
10" THICK LAYER OF IMPERVIOUS
CLAY MATERIAL COMPACTED TO
95% STANDARD PROCTOR
1'-0"LEVELINGPADWALL HEIGHT (H) VARIES4'-6"2'-0"MIN.6" PERFERATED PVC UNDERDRAIN
WRAPPED IN FILTER FABRIC, SEE DET. 'E'
COMPACTED 12" CRUSHED
STONE AGG. LEVELING PAD
LENGTH OF GEOGRID (L) (TYP)
FREE DRAINING GRANULAR
BACKFILL, (SEE NOTE 'F')
FILL CORES W/ FREE DRAINING
GRANULAR BACKFILL AS EACH
COARSE IS SET
1'-0"
MIN
FOUNDATION SOIL - SANDSTONE OR SHALE
6 MIN1
START GEOGRID AT
FRONT OF BLOCK
NON-WOVEN GEOTEXTILE FABRIC,
COVER LAP GEOGRID 12" MIN. (TYP)
1'-0"
3'-0"6"1'-0"
VERTI-BLOCK
36" STANDARD
BLOCK (TYP)
WALL STATION
CONTROL LINE
6" CAP BLOCK CONC. FLUME, SEE DET. 'H'
TOP OF WALL
HALF-STEP BLOCK
4" TOPSOIL & HYDROMULCH
SAFETY RAIL NOT SHOWN
(SEE DETAIL BELOW)
4'-0"
MIN
(TYP)
DME13222City of Denton, Texas
Denton Municipal Electric
Brinker Substation Gravity Wall
Dec 2018revisionno.dateby
date
scale
vert
horiz
tnp project
sheet1517 Centre Place Drive, Suite 320
Denton, Texas 76205
940.383.4177 ph 940.383.8026 fx
TBPE Registration No. F-230
www.tnpinc.com
teague nall & perkins
N/A
N/A 10
Modular Block Wall Details
GENERAL STRUCTURAL NOTES:
GEOGRID REINFORCEMENT SCHEDULE (VERTI-BLOCK)
WALL STATION
RANGES
MAX. WALL
HT. 'H'
LENGTH OF
GEOGRID 'L'
MIN.
GEOGRID
LAYERS
1+96 TO 3+28
8+76 TO 9+22 6'-0"6'-6"2
3+28 TO 4+82
7+80 TO 8+76 12'-0"10'-6"5
4+82 TO 6+02
6+24 TO 6+36
7+10 TO 7+80
18'-0"14'-0"8
6+02 TO 6+24
6+36 TO 7+10 20'-0"15'-6"9
MATERIAL EFFECTIVE FRICTION
ANGLE (DEG)
EFFECTIVE
COHESION
MOIST UNIT
WEIGHT
* RETAINED SOIL 30 0 PSF 119 PCF
** FOUNDATION SOIL 0 1500 PSF 131 PCF
REINFORCED FREE DRAINING 34 0 PSF 115 PCF
* CLAYEY SAND (SC)
A.ALL MODULAR BLOCK GEOGRID REINFORCED RETAINING WALLS SHALL BE VERTI-BLOCK 36" STANDARD BLOCK (24"H X 48"L X
36"D) BY VERTI-CRETE, LLC. OR APPROVED EQUIVALENT. ARCHITECTURAL FINISH SHALL BE COORDINATED WITH OWNER.
ACCEPTABLE ALTERNATIVE MODULAR BLOCK WALL SYSTEMS:
1.RECON STANDARD 24" BLOCK (16"H X 48"L X 24"D)
2.REDI-ROCK 28" POSITIVE CONNECTION (PC) SYSTEM BLOCKS (18"H X 46"L X 28"D)
B.REFER TO PROJECT GEOTECHNICAL REPORT NO. 13-0278-21 AND REPORT ADDENDUM NO. 1 BY D&S ENGINEERING LABS FOR
BORING AND CONSTRUCTION REQUIREMENTS. THE TESTING AGENCY OF RECORD SHALL FIELD VERIFY WALL FOUNDATION
SOIL PROPERTIES ARE IN ACCORDANCE WITH DESIGN TABLE 'J' REQUIREMENTS.
C.ALLOWABLE BEARING PRESSURE FOR WALL FOUNDATIONS DESIGN SHALL BE 2.0 KSF.
D.ALL WALL DESIGNS WILL BE IN CONFORMANCE WITH THE NCMA-09-3RD EDITION PUBLICATION.
E.COMPACTION SHALL BE ACCOMPLISHED USING HAND COMPACTION EQUIPMENT AND SHALL BE COMPACTED BETWEEN 90%
AND 95% OF STANDARD PROCTOR DENSITY. AVOID HEAVY CONSTRUCTION EQUIPMENT BEHIND WALLS DURING
CONSTRUCTION.
F.ALL FREE DRAINING GRANULAR WALL BACKFILL MATERIAL SHALL EXTEND TO ONE FOOT BEYOND LIMITS OF GEOGRID AND
SHALL BE CRUSHED ROCK, STONE, SAND/GRAVEL MIXTURE, OR SAND/CRUSHED STONE MIXTURE. THE MATERIAL SHALL HAVE
LESS THAN 3% PASSING #200 SIEVE AND LESS THAN 30% PASSING #40 SIEVE. THE MINUS #40 SIEVE MATERIAL SHOULD BE
NON-PLASTIC. GRANULAR WALL BACKFILL SHOULD NOT BE WATER JETTED DURING INSTALLATION.
G.CONTRACTOR SHALL PROVIDE PROFESSIONAL LICENSED ENGINEER SIGNED AND SEALED SHOP DRAWINGS AND DESIGN
CALCULATIONS FOR ALTERNATIVE WALL INSTALLATIONS FOR OWNER'S APPROVAL PRIOR TO CONSTRUCTION. CONTRACTOR'S
ALTERNATIVE WALL DESIGN SHALL BE IN CONFORMANCE WITH GEOMETRIC CONSTRAINTS PROVIDED ON WALL PLAN
LAYOUTS.
H.MINIMUM LENGTH OF GEOGRID (L) IS SHOWN ON TYPICAL WALL SECTIONS AND GEOGRID REINFORCEMENT SCHEDULE.
I.ALL WALLS SHALL BE DESIGNED FOR THE FOLLOWING CRITERIA:
·FACTOR OF SAFETY IN SLIDING >1.5
·FACTOR OF SAFETY IN OVERTURNING ≥ 2.0
·FACTOR OF SAFETY OF EARTH REINF. PULLOUT ≥ 1.5
·FACTOR OF SAFETY FOR CONNECTION ≥ 1. 5
·FACTOR OF SAFETY FOR GLOBAL STABILITY ≥1.5
·FACTOR OF SAFETY FOR BEARING ≥ 2.0
·FACTOR OF SAFETY FOR SHEAR ≥ 1.5
·SURCHARGE = 40 PSF
·THE BASE PRESSURE RESULTANT SHALL FALL WITHIN THE MIDDLE THIRD OF THE RETAINING WALL.
J.DESIGN OF THE REINFORCED EARTH RETAINING WALLS SHALL BE BASED UPON THE FOLLOWING PARAMETERS:
K.NOTIFY ENGINEER IF SANDSTONE OR SHALE IS NOT ENCOUNTERED AT BASE OF WALL PRIOR TO CONSTRUCTION.
L.ALL MISCELLANEOUS CONCRETE SHALL MEET THE REQUIREMENTS OF 3000 PSI CONCRETE STRENGTH AT 28 DAYS.
M.REINFORCING BARS SHALL BE ASTM A615, GRADE 60.
** SANDSTONE OR SHALE
GRANULAR BACKFILL (NOTE F)
F TYPICAL WALL ELEVATION & STEP DETAIL
NOT TO SCALE
FINISHED
GRADE
2'-0"CRUSHED STONE LEVELING PAD
BOTTOM OF WALL"H" SEE PROFILESMIN.UNDERDRAIN SHALL BE
WRAPPED WITH FILTER
FABRIC MEETING THE
REQUIREMENTS OF TXDOT
DMS-620. TYPE I.3"6" DIA.
PERFORATED
PIPE
FILTER MATERIAL
SEE NOTE 'F'1'-0"1'-0"
3" OF SOIL FILL IS REQUIRED BETWEEN
OVERLAPPING GEOGRID FOR PROPER
ANCHORAGE (TYP.)
PLACE ADDITIONAL PIECES OF GEOGRID
WHEN ANGLE EXCEEDS 20°
DRAINAGE FILL20°E UNDERDRAIN DETAIL
NOT TO SCALE
G FRICTION CONNECTION DETAIL
NOT TO SCALE
VERTI-BLOCK
36" STANDARD
BLOCK (TYP)
CUT MESH FOR
LIFTING RINGS
MESH SHALL
LAY FLAT ON
TOP OF BLOCK
BOTTOM
OF WALL
2' STEP
I GEOGRID INSTALLATION ON CURVES
NOT TO SCALE
INSIDE CURVES:
BOTTOM ROW MINIMUM RADIUS IS 16'.
SETBACK IS 2 3/4" AND EACH ROW
WILL INCREASE THE RADIUS BY 2 3/4"
MORE THAN THE ROW BELOW IT.
OUTSIDE CURVES:
TOP ROW MINIMUM RADIUS IS 16'.
SETBACK IS 1 5/16" AND EACH ROW
WILL INCREASE THE RADIUS BY 1 5/16"
MORE THAN THE ROW ABOVE IT.
J INDIVUDUAL BLOCK VIEWS
NOT TO SCALE
4'-
0
"2'-0"3'-0"
STANDARD BLOCK
STANDARD HALF-STEP BLOCK
4'-
0
"1'-0"3'-0"
48"
26"6"26"
49"6"2 SIDED CAP 3 SIDED CAP
SIDE VIEW
CONFLICTING AREA WILL REQUIRE THE USE
OF A 13" NUB BLOCKOUT OR SAW CUT AND
REMOVAL OF PICK POINT WHEN CAP IS USED
K 6" CAP BLOCK DETAIL
NOT TO SCALE
4'-
0
"2'-0"2'-0"
CORNER BLOCK
1'-0"4'-
0
"
2'-0"
HALF-STEP CORNER BLOCK
H FLUME DETAIL
NOT TO SCALE
3"6"1'-6"6"3"
3 - #3 BARS
@ EQ. SPA.
3'-0"
#3 BARS
@ 18" O.C.
3" CLR
(TYP)
1/2" PREFORMED EXPANSION
JOINT MATERIAL WITH SEALANT
VERTI-BLOCK 36"
STANDARD BLOCK
OR HALF-STEP
BLOCK (TYP)
6" CAP BLOCK
FIN. GRADE
CONC. INFILL TOP BLOCK CELL
FLUSH WITH TOP OF FLUME
6"6"DME13222City of Denton, Texas
Denton Municipal Electric
Brinker Substation Gravity Wall
Dec 2018revisionno.dateby
date
scale
vert
horiz
tnp project
sheet1517 Centre Place Drive, Suite 320
Denton, Texas 76205
940.383.4177 ph 940.383.8026 fx
TBPE Registration No. F-230
www.tnpinc.com
teague nall & perkins
Modular Block Wall Details
N/A
N/A 11