FLOOD06430

• County: Statewide
• Basin: Statewide
• Title: Conduits, Culverts and Pipes
• Date: 3/3/1969
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

I

I

_ 1110-Z-2902, Appendix III, 3 Mar 1969

I

F"rt, 1IIf'" surltH>>

I

If, drmtIic t1f
walerinctlfNluil ~5NNo"No.2

-r- ~~~~ ~L~~~CE ~_ ~
I I LIVE LOAD I '3 .t~
--I.~ I- - - - - -- - - -l ~ i _l \ ,F;";._ 9rr1do
w/.....w/'?"''f''t l' I u VIQ:IRf/l..ttA\
I I:::: ~I ifl '- ~ I \
I ~ 01 I ......, I
f . I ~ <; I ~I I; ~ I \
~t"", 'r'.c: ~~ ~I )" I \
--.loll/ration '''V~ --._ __ ~_ + i~l l::~: ~ : \
;" I I ... --- I, 1 ~ I \
/ I ~ I ~ "I ~I .~ ~ I \
/ I I I.e; ~l I ~ ~ I \
I '''i; Ird.wiltl.l!'~I>: a, I l! 8 I \
~rwHs: oC ~ r I ~ ~: \
rn.--- t ~ .--,
: ; t m rdkH' :
! : I h :
, ,; I
! ' I, I SMNcW :

: ~ J':' ~ I \r 1'W(h1010~ I, No.5 :
, frd.t(H~ J ~ }ffJc(H~O~21).
,wfH"O-211 l",",'-i r /J
~kf,4.0.. t) ,~ .
I, I
See NoM No.5

/1
I I
I I
I I
I I
Z-.........l

I

I

I

I

~
SH NOlt NO.6

UPLIF'" FOUNDATION} (SH NoM No. 6)
FOUNDATION PRESSURE Foundo/ion ~clion
PRESSURE

I----see Nolt No 3-----1

SUBMERGED SOIL

I

I

SATURATED OR

NATURAL DRAINED SOIL

I

NOTES:

1. Loadings shown or noted on this plate are typical conditions and each designer should
modify them as necessary to match the local conditions anticipated.

2. H' represents a height of fill equivalent to the total weight of all dead and live loads
effectively supported by the conduit, including the weight of sol1 and witer and the
weight of any loads transmitted thru the soil to the conduit except impact. When part
or all of the soil above the pOint in question is saturated or submerged. the weight and
pressure of water may be treated separately. The weights and pressures due to soil then
are based on its weight reduced by 62.5 lbs/c.f. Impact is not usually considered where
backfill above the top of the condui t exceeds three feet.

3. Foundation reactions are usually assumed to te uniformly distributed across the full
base width of cast-in-place conduits, and uniformly across the bedding width of precast
conduits corresponding to the conditions to be shown and specified in the construction
plans and specifications.

4. h" the head of water (in feet) above the point in question. w z the unit weight of
water expressed as 62.5 1bs/c.f. Yd" naturai drained weight of soil. Yb" buoyant
(submerged) weight of soil. )'5" saturated weight of soil.

5. When the head of ',",ater above the crown exceeuS about 20, the water pressure against
the conduit, ;ntefnally or externally, may be assumed as uniform and equal to the head
at the conduit's horizontal axis. However, uplift should normally be based on head at
bottom of conduit for examining flotation possibilities.

6. When H' exceeds about twice the height of conduit, the horizontal pressure of soil
against the conduit may be considered as uniform and equal to the soil pressure at the
conduits horizontal axis.

7. Effective weights of water and soil are wei9ht scales and do not coincide with height
scales.

I

I

I

I

I

TYPICAL LOADING DIAGRAM FOR CAST-IN- PLACE CONDUIT

I

PLATE 4

I

1II-9

I