P T0P= Z F - v p, W t
(F +
t J-. I ,
/• . v.. kVt
bu y erd a: F vv- d e v t tt o r n in g salt y u ris h g a
q a rs h ilik k u ch i, N; F , - q i r g ‘ichlar
b ilan g ru n t
su ris h g a q a rs h ilik , N:
g ru n tn i
nio h id a z a rra c h a la rg a
( b o l a k h i r p ) b o 'lin ib
k e tish g a q a rs h ilik , N: /^ - q ir g 'i c h ln i ii m g c h o 'm ic h bilan
a lo h k iu o 'z u ro t a s m p a y u d a g i q a rs h ilik , N ; F j - g n m t n m g q a rs h ilig i, M
Skreperning tortish kuchini hisoblash
a)
islilash paytida, tf-rasm,
Umumiy qarshilik:
v
f
F F - F
+
F +F
kN
P
R
P R
к
1
IP
bu y erd a: F ;i- k e s is h d a g i q a rs h ilik , kN ; F ra- k o v s h (ch o 'm ich ) old id ag i
tu p ro q n in g s u rish d a g i q a rs h ilig i, k N ; F ^ - k o v s h (cho‘m ich )n in g to 'lish id a g i
va tu p ro q q irin d is in in g q o ‘z g ‘a tish q a rs h ilig i, kN ; F g- y u k l a n g a n s k re p e rn in g
h a ra k a tla n is h d a g i
q a rs h ilik kN ;
Tuproqni kesishdagi qarshilik:
F = K - v - h , k ' N
p
k
bu y erd a: v ^ -k o v sh (ch o ‘m ich )n in g eni, m ; /г- k e s ili s h c h u q u rlig i, m;
/s f-k a v la sh d a g i so lish tirm a q a rs h ilik , K P a.
Kovsh (cho‘mich)ning oldidagi tuproqning surishdagi qarshiligi:
F PR
=
V k H m P
g r
'
K
p r
■ S ,
k V t
bu y erd a: / / - t u p r o q u y ish i o x irid a q irin d isin in g
ch iq ish b a la n d lig i, m
(H g r= 0 ,4 ...0 ,8 m); A T..-qopqoqning o ld id a g i tu p ro q n i su rish d a hosil b o lu v c h i
k o effitsiy en t,
Dostları ilə paylaş: