HomeMy WebLinkAboutWTR2703149_27 FINISHED GROUND
CONCRETE BLOCKING SIZING PROCEDURE TABLE 1
co A. GENERAL THRUST AT FITTINGS IN POUNDS
THE AMOUNT OF CONCRETE REQUIRED TO ANCHOR HORIZONTAL BENDS SIZE PRESSURE THRUST 90' 45' 22 1 /2' 11 1 /4' Z
6 PSI TEES BEND BEND BEND BEND -
TEES, AND DEAD ENDS DEPENDS ON THE STRENGTH OF THE SOIL. THE DEAD ENDS
"
METHODS OF PLACING CONCRETE TO KEEP THE JOINT ACCESSIBLE IS EXISTING UTILITY
LLJ SHOWN IN FIGURE 1 . THE AREA IN SQUARE FEET IS FOUND BY DIVIDING 6" 225 6375 9000 48825 2490 1275 5'-0 OR JOINT TRENCH �
THE THRUST IN POUNDS SHOWN IN TABLE 1 BY THE SAFE LOAD OF THE 12,, 225 30537 43200 23355 11934 6102 MIN
SOIL AS SHOWN IN TABLE 2. (TYPICAL)
B. CRITERIA
1 . THE SIZING PROCEDURE IS HORIZONTAL OR DOWNWARD ,,. :. .
THRUST ONLY. TABLE 2 . '
2. HEIGHT OF THE THRUST BLOCK MUST BE EQUAL TO OR LESS SAFE BEARING LOADS IN LB/SQ FT 6" MIN
THAN 16 THE DEPTH FROM THE GROUND SURFACE TO THE
BLOCK BASE.
3. THE THRUST BLOCK BEARING FACE IS APPROXIMATELY RECTANGULAR. THE SAFE BEARING LOADS GIVEN IN THE FOLLOWING TABLE ARE FOR
4. THE CONCRETE BLOCKING SHALL BE AS PER APWA HORIZONTAL THRUST WHEN THE DEPTH OF COVER OVER THE PIPE
EXCEEDS 2 FEET.
SPECIFICATION 74-2.12. - �` • 45' OR 22.5° VERTICAL BENDS
,
1 . LOGAN AVENUE N, STA 145+00 TO STA 48+00 1 ,000 (MJXMJ) WITH CONCRETE BLOCKING 1
C. SYMBOLS 2. LOGAN AVENUE N, STA 48+00 TO STA 58+00 1 ,500 4-3/4 SHACKLE RODS PER STANDARD DETAILS (TYPICAL)
D =OUTSIDE DIAMETER OF PIPE IN FEET 3. LOGAN AVENUE N, STA 58+00 TO STA 75+00 2,000 FROM BEND TO BEND
T =THRUST IN POUNDS OF THE FITTING (TABLE 1 ) 4. PARK AVENUE N, FULL LENGTH 2,000 (SEE STD DETAIL)
SBL =SAFE BEARING LOAD IN POUNDS/SQ FT (TABLE 2) 5. N 6TH STREET, FULL LENGTH 1 ,000
h =DEPTH OF TRENCH IN FEET 6. N 8TH STREET, STA 61 +00 TO STA 73+00 2,000
W =WIDTH OF TRENCH IN FEET 7. N 10TH STREET, STA 51 +00 TO STA 66+72 2,000 ELEVATION VIEW
A =AREA OF CONCRETE WHICH MUST BE BEAR AGAINST
Hm T MAXIMUM HEIGHT NE SIDE OF THETOFNCH T E ITHRQUSTT BLOCK IN FEET IN MUCK OR PEAT, ALL THRUSTS SHALL BE RESTRAINED BY PILES OR TIE DETAIL FOR WATER MAIN i
Dc =DEPTH OF CONCRETE THRUST BLOCK TO BEARING SURFACE RODS TO SOLID FOUNDATIONS OR BY REMOVAL OF MUCK OR PEAT AND
IN FEET REPLACEMENT WITH BALLAST OF SUFFICIENT STABILITY TO RESIST THRUSTS. CROSSING UNDER OTHER UTILITY
Lm =MAXIMUM LENGTH OF THE THRUST BLOCK IN FEET 2
GROUND SURFACE NO TO SCALE
Table 3. Area of Concrete
h \ �� d \\ Location Tees, Dead Ends( 90° Bend (sf) 460 Bend (sf) 22 1/20 Bend (sf) 11 1/4° Bend (sf)
\\` 6" 12" 6" 12" 6" 12" 6" 12" 6" 12"
I
h �� Logan Ave. N., Sta. 145+00 to 48+00 6.4 30.5 9.0 43.2 4.9 23.4 2.5 11.9 1.3 6.1
_. _ --
Hm= 2 Logan Ave. N., Sta. 48+00 to 58+00 4.3 20.4 6.0 28.8 3.3 15.6 1.7 8.0 0.9 4.1
Logan Ave. N., Sta. 58+00 to 75+00 3.2 15.3 4.5 21.6 2.4 11.7 1.2 6.0 0.6 3.1 i
BLOCK BASE
Park Ave. N., Full Length 3.2 15.3 4.5 21.6 2.4 11.7 1.2 6.0 0.6 3.1
�DC N. 6th St., Full Length 6.4 _30.5 9.0 43.2 4.9 23.4 2.5 11.9 1.3 6.1
N. 8th St., Sta. 61+00 to 73+00 3.2 15.3 4.5 21.6 2.4 11.7 1.2 6.0 0.6 3.1
D. CALCULATION EQUATIONS N. 10th St., Sta. 51+00 to 66+72 3.2 15.3 4.5 21.6 2.4 11.7 1.2 6.0 0.6 3.1 CL 52
A = Thrust / Safe Bearing Load
THRUST (IN POUNDS T 12" DI PIPE,, IFRSHOWN BLOCK
( )
1 . AREA OF CONCRETE (A) = SAFE BEARING LOAD IN POUNDS SQ FT = SBL NP
DEPTH OF TRENCH IN FEET h 45' BEND, MJxMJ WITH
2. MAXIMUM HEIGHT OF THRUST BLOCK (Hm) = 2 =2 2-MJ JOINT RESTRAINTS
(WIDTH OF TRENCH IN FEET)- W-d ORGALUG EQ EQUAL
1100 z
(OUTSIDE DIAMETER OF PIPE IN FEET) _ ^
3. DEPTH OF CONCRETE THRUST BLOCK = - 2 -
m
2 , -� � o
AREA OF CONCRETE _ A
4. MAXIMUM LENGTH OF THRUST BLOCK (Lm) = MAXIMUM HEIGHT - Hm CAP 22-1 /2' 90' BEND 18' 18' y y
STANDARD PUSH ON JOINT STD LENGTH STD LENGTH STANDARD PUSH z
5. REQUIRED AMOUNT OF CONCRETE (Cu Yd) = HEIGHT x DEPTH x LENGTH) x 0.03704 WITH MEGALUG HARNESS ON JOINT o x 1
�Hm x Lm x Dc) x 0.03704 MODEL 1700 OR EQUAL - - ti o N
00 CC
E. EXAMPLE
45' BEND, MJxMJ WITH y° 1
2-MJ JOINT RESTRAINTS ZS W
1 . PROBLEM MEGALUG MODEL 1 100
STANDARD PUSH ON JOINT
CALCULATION OF THE AMOUNT OF CONCRETE REQUIRED TO BLOCK A 90' o
BEND IN A 12 CI WATER MAIN; THE NORMAL OPERATING PRESSURE IN THE OR EQUAL WITH MEGALUG HARNESS
PIPE WILL BE 225 PSI AND THE SOIL CONDITION IN N. 6TH ST. 45' BEND 11 -1 /4 MIN 26' RESTRAINED MODEL 1700 OR EQUAL c z
TEE y
2. SOLUTION JOINT PIPE
-OUTSIDE DIAMETER OF 12" PIPE = 13.20 IN=13.20/12=1 .10 FT
-GO TO FIGURE 1 : FIGURE 1 INDICATES THE POSITION OF THE CONCRETE NOTE: FOR CONVEX VERTICAL BENDS BLOCKING
FOR BLOCKING THE 90' BEND. SEE APWA STANDARD PLAN NO. 73.
-GO TO THE PLANS OF THE PROJECT AND FIND DEPTH OF
TRENCH (h) = 5 FEET
-WIDTH OF TRENCH (W) = 3 FEET
WITH THE ABOVE ASSEMBLED INFORMATION, WE PROCEED TO FIND RESTRAINED JOINT BEND DETAILCALCULATIONS: CONCRETE BLOCKING SIZING PROCEDURE , 3
-MAXIMUM HEIGHT OF THRUST BLOCK (Hm) = DEPTH OF TRENCH IN FEET = h = 5 = 2.5 FT NOT TO SCALE NO TO SCALE ._
2 2 2
WIDTH OF TRENCH IN FEET (W) 3-1 .10 = 0.95 FT CONCRETE BLOCKING SIZING PROCEDURE
-DEPTH OF CONCRETE THRUST BLOCK (Dc)= - OUTSIDE DIAMETER OF PIPE (d) = 2 Y ADOPTED
2 CITY OF RENTON
-MAXIMUM LENGTH OF THRUST BLOCK (Lm) = AREA OF CONCRETE = A = 9•0 = 3.60 FT �,� STANDARD PLANS 4- of WA
HEIGHT OF CONCRETE Hm 2.5 � � LST DATE: 12/96 RECORD DRA WINGS
PREPARED BY WHPAC/FIC, Z
REV BY B&H 2/24/06 FEBRUARY 2010, BASED
DWG. NAME: BR26 SP PAGE: B085 W 314928 ON CONTRACTOR RECORDS. j
-REQUIRED AMOUNT OF CONCRETE =(HEIGHT x DEPTH x LENGTH) x 0.03704 �o�.�F�°d sT�4�o`����
= Hm x Lm x Dc) x 0.03704 �s
= 2.5 x3.60 x 0.95) x 0.03704 S'ONAL
_ .32 Cu Yd
EXPIRES 06/06/O7 �
n
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� CITY OF CITY OF RENTON 4/17/os
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