Thrust Block Calculator - 201708230926201609 [PDF]

Citation preview

SIZE A THRUSTBLOCK



PROJECT NAME: PROJECT NUMBER: DATE:



BY: BEARING STRENGTH LB / FT SQ.



DETERMINE SOIL TYPE & BEARING STRENGTH:



DETERMINE CROSS SECTIONAL AREA OF PIPE INTERIOR:



MUCK: SOFT CLAY: SILT: SANDY SILT: SAND: SANDY CLAY: HARD CLAY:



PIPE SIZE 4" 6" 8" 10" 12"



DUCTILE IRON 13.203 29.802 53.716 83.000 119.597



0 1000 1500 3000 4000 6000 9000



HEIGHT OF BLOCK:



14.120 29.033 50.014 75.276 105.683



T = Thrust P = Water Pressure A = Cross sectional area of pipes interior



Note: 1. Block height should be equal to or less than one half the total depth to the bottom of the block, but not less than the pipe diameter. 2. Block height should be chosen such that the calculated block width is between one & two times the height. Note:



REQUIRED BLOCK AREA, WIDTH, DEPTH & VOLUME



LB / FT SQ.



PLASTIC



HIGHEST ANTICIPATED WATER PRESSURE:



ANGLE OF CHANGE & RESULTING THRUST ON FITTING:



1000



1. Thrust blocks shall be of a concrete mix not leaner than: 1 part cement 2-1/2 parts sand 5 parts stone 2. Where possible the bearing surface of the block should be placed against undisturbed soil. Where it is not possible, fill between the bearing surface and undisturbed soil must be compacted to at least 90% standard proctor density



29.802



SQ / IN



100.00



P.S.I



90.00



DEG.



4214.64



2.00



LBS THRUST



FEET



6.32 ft



REQUIRED AREA



3.16 ft



CALCULATED WIDTH



1.58 ft



CALCULATED DEPTH



9.99 cu.ft.



CALCULATED VOLUME