HomeMy WebLinkAboutGEO BLD2009-00052 Bulkhead Specs - BLD Engineering / Geo-tech Reports - 2/19/2009 GeoResources,
Rock Bulkhead Design and Calculations
PG,E G1 1�
37
Prepared By: ,s
GeoResources LLC. S���aLE�G
5007 Pacific Highway East, Suite 20
Fife, WA 98424
(253) 896-1011 phone
(253) 896-2633 fax
W. Glen Coad, PE
Principal
Prepared For: Site Address:
The Todd's 771 East Windjammer Circle
c/o Bay Marine Contractors, Inc. Shelton, WA 98584
3348 Fishtrap Road NE
Olympia, WA 98506 P/N 121195700044
Attn: Mr. Dan Foss
To B" K c
J.-
Contents
Calculations............................................................................................................................................... 2-3
SitePlan ........................................................................................................................................................4
CrossSection ................................................................................................................................................5
TypicalDetail.............................................................................................................................................SK1
RECEIVED
FEB t 9 20
426 W:CEDAR S'fa
BayMarine.Todd.BPD
February 18, 2009
Page 2 of 5
Calculations
Notes:
1) See attached cross section for project description
2) All calculations are per lineal foot of Bulkhead
Assumptions:
Density of rock (p): 170 pcf
Porosity of Bulkhead(n): 25%
Equivalent Fluid Pressure of Backfill (y): 35 pcf
Coefficient of friction for rock to silty sand, DM-7, Table 10-1 (p): 0.5
Dimensions:
T T=2.0 feet
B= 3.0 feet
'.ice• ':�.
H = Max Exposed Height= 5.0 feet
Calculate Weights:
T
H' = H + 1.5
= 6.5
\ W1 = T*H'(Y * (1 —n))
\ = 1657.50
W2 = (B — T) * H' *2* (Y * (1 —n))
w, �: \
= 414.38
Total = 2071 .88
A
8
BayMarine.Todd.BPD
February 18,2009
Page 3 of 5
Resistance to Overturning:
T 11 2
�MA = W1 * —(2
+ (B — T) I + W2 *3* (B — T)
= 3591 .25
Overturning Moment:
Equivalent fluid pressure = y =35 pcf
1
F1 = 2 * H2 *Y
= 437.50
H H
M'A = F1 * 3
/F,
= 729.17
Factor of Safety for Overturning:
A
H•Eq FP = MA = 4.9 > 2.5 •• o.k.
Calculate Sliding Resistance:
Sliding force = FAR = F, =437.50
Resistance to Sliding (neglecting passive pressure):
Total weight=W1+W2=2071 .88
Friction Force= FR = Wtotal *µ = 1035.94
Factor of Safety for Sliding:
—FR = 2.4 >_ 1 .5 •• o.k.
- FR
m m
m c E�:
>y cm 1 m
N O
O Q
PARCEL*1'119670OD44 °
SEC19T21Nd�0t', oN.P,1. NOAIiJ01NMIC� SITEPL4N C° �
6t1LKHEAD-'r------..ti o
N47.18.01 W122.51.0
CASE INLET'
BLUFF CTi1 9T--
APPROX.
PROPERTY
Y
LINE _ . --------•-^"-------� - ---__--'__"'-.
SUL OVAD SHALL BE
CONSTRUCTED OF L
MMLAR ROCK ILAMItd D
OF THE TOE OF THE SLOE c
AT BEACH AND itiS}*W Cd U RRY
ST'kLSAND FI<TER FABRC SHALL
' RESCE`.`CE
6 BE USED BE)i W tf-E h WW WA1WEW.
EX!SUNG VEGETATION cPXL
� SE PRESERVED MEREWR
w ITISPEASIBLE. EXISTNG
WOMY DEMIS SHALL BENW 4 AHORED TO
APPlL^~ -- --- _ _____ 7 BFArN.
x
LWE
NO ADMMNG
f ULKHEAD-
. j
n � -nUp
(DUD
PARCR_012115,5700044 CROSS S78 N N o
SEC19-T21 N-Ra VA-MA. cr, o, P
1447.18.01 4N122.51.0
0 O
o a
BUMEAD SIPa BE CO
GONSTRU>rTEDOF LARGE
AtWM ROCK LANlJWO
® ,ares�aa T r fE TOE OF H SLOE
� �r ADx. a BLUFF ! AT Ar�Nd0 MNlfiht 44 '+'
CREST AND 21'Tb 1 S141SAND FILTER FAMC WAU
r BEACH TOE BE USED EIEHTiD THE NEW BUUtFEEAD.
3 � � i_^' •1 � � t s
Z5,
I APFROX. E?415T1W VZOETATIGN 51 M
BE PRE S WED WMf" EW-R
11 ES FFAsiBLE EXISTING
-•r v. ? \` AAiCFYJF EDTO
THE BEACH,
"� 616rJ:IB+I'E
'! t•.� y cRf1=C NOW
14 r Ira 4
:' 5 E.Ynf 14V 14:fir
f LTER fpeRc 4wo
-y a i mar mari5HFOCA + = BEACH GRADE
VMC�CIT9'MAP MWISYMICA090Fr
1 3/4 OR GREATER
2' (min)
1 a Q
III=
0
IIIEI
a _
1 OR GREATER41
II I I
rn 6 — I.
_ -I11111 SLOPE EXISTING NATIVE CUT
� o
0 12" MIN
ui ALL LOC
_ QUARRY SPALLS
(12" MIN)
GEOTEXTILE
FABRIC
FINISH III;
GRADE \ III
III-
Cv
���
PLACE ROCK ON FIRM I„I I-1 I I III=1 3 r 1
UNDISTURBED SOILS 3' (min) —I I I I RF 38��
OR CONCRETE BASE ' C�
ssf��AL E1
SKETCH NO:
SK1
PROJECT NAME: PROJECT NO: BY: DATE:
TODD RESIDENCE BM.TODD RPO 02/18/09
_ CONSTRUCTION FIELD SKETCH:
PROPOSED BULKHEAD
5007 Pacific Hwy. E,•Suite 20 PHONE: 253896-1011 771 EAST WINDJAMMER CIRCLE
Fife, WA 98424 FAX: (253;896-2633 SHELTON, WASHINGTON
GEOTECI INICAI_
BULKHEAD.dwg 18 Feb 2009 — 12:36 pm ryano