TEMAT: SPRAWDZENIE STATECZNOŚCI OGÓLNEJ UKŁADU |
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ŚCIANA OPOROWA - USKOK |
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Jeden rodzaj gruntu |
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Autorzy: |
Piotr NIEDZWIEDŹ |
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Rafał KLICH |
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Program służy do obliczania max. momentów obracających i min. momentów |
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utrzymujących metodą Felleniusa, które służą do sprawdzenia stateczności ogulnej |
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sciany oporowej-uskok na podstawie PN-81/B-03020 "Posadowienie bezpośrednie |
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budowli" , PN-83/B-03010 :Ściany oporowe, obliczenia statyczne i projektowanie. |
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i "Fundamentowanie - przykłady obliczeń" Edwarda Motaka. |
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Do sprawdzenia stateczności układu sciana oporowa-uskok program używa tylko wartości |
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obliczeniowe. |
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Rozdzielczość ekranu 1024 x 765 |
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Komórki zaznaczone kolorem niebieskim służą do wprowadzania danych |
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Komórki zaznaczone kolorem zielonym dają wyniki |
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Tekst pisany kursywą i w kolorze brązowym to komentarz |
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Tekst pisany w kolorze czerwonym to ostrzeżenia |
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indek górny "n" oznacza wartości charakterystyczne |
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indek górny "r" oznacza wartości obliczeniowe |
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Dane do obliczeń: |
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- obciążenie naziomu : |
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charakterystyczne qnn = |
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10.0 |
[ kN/m] |
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współczynnik gf = |
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1.2 |
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obliczeniowe qnn = |
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12.0 |
[ kN/m] |
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- parametry geometryczne sciany oporowej |
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- wysokość ściany ponad grunt: |
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hn = |
5.5 |
[ m ] |
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- głębokość posadowienia ściany oporowej: |
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D = |
2.0 |
[ m ] |
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- szerokość ściany oporowej; |
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B = |
3.0 |
[ m ] |
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- ciężar objętościowy betonu na jeden metr bieżący ściany : |
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charakterystyczne |
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qbn = |
24 |
[ kN/m2] |
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współczynnik obciążenia |
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gf = |
1.1 |
zwiększający |
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współczynnik obciążenia |
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gf = |
0.9 |
zmniejszający |
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do obl. Mu i Mo |
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qbr = |
26.4 |
[ kN/m2] |
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qbr = |
21.6 |
[ kN/m2] |
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Zwierciadło wody gruntowej ZW znajduje się |
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1.50 |
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metry poniżej górnego poziomu terenu , grunt nr 2 jest w całości nawodniony. |
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- podłoże gruntowe |
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Grunt nr 1. |
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Rodzaj gruntu: |
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piasek drobny , średnio zagęszczony |
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kąt tarcia wewnętrznego gruntu |
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fun = |
30 |
o |
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współczynnik materjałowy |
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gm = |
1.1 |
zwiększający |
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współczynnik materjałowy |
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gm = |
0.9 |
zmniejszający |
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fur = |
33 |
o |
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do obl. Mu i Mo |
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fur = |
27 |
o |
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ciężar objętościowy gruntu |
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g n = |
16.2 |
[ kN / m3 ] |
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współczynnik obciążenia |
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gf = |
1.1 |
zwiększający |
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współczynnik obciążenia |
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gf = |
0.9 |
zmniejszający |
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do obl. Mu i Mo str.PRAWA |
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g r = |
17.82 |
[ kN/m2] |
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g r = |
14.58 |
[ kN/m2] |
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` |
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ciężar objętościowy gruntu |
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z uwzględnieniem wyporu wody |
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g` n = |
8.8 |
[ kN / m3 ] |
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współczynnik obciążenia |
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gf = |
1.1 |
zwiększający |
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współczynnik obciążenia |
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gf = |
0.9 |
zmniejszający |
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do obl. Mu i Mo str.PRAWA |
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g` r = |
9.68 |
[ kN/m2] |
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g` r = |
7.92 |
[ kN/m2] |
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spójność gruntu |
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cun = |
0 |
[ kN / m3 ] |
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współczynnik obciążenia |
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gm = |
1.1 |
zwiększający |
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współczynnik obciążenia |
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gm = |
0.9 |
zmniejszający |
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cur = |
0 |
[ kN/m2] |
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do obl. Mu i Mo str.PRAWA |
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cur = |
0 |
[ kN/m2] |
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Grunt nr 2. |
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Rodzaj gruntu: |
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glina pylasta, twardoplastyczna |
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kąt tarcia wewnętrznego gruntu |
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fun = |
19 |
o |
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współczynnik materjałowy |
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gm = |
1.1 |
zwiększający |
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współczynnik materjałowy |
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gm = |
0.9 |
zmniejszający |
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fur = |
20.9 |
o |
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do obl. Mu i Mo |
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fur = |
17.1 |
o |
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ciężar objętościowy gruntu |
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z uwzględnieniem wyporu wody |
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g`2n = |
10.3 |
[ kN / m3 ] |
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współczynnik obciążenia |
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gf = |
1.1 |
zwiększający |
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współczynnik obciążenia |
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gf = |
0.9 |
zmniejszający |
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do obl. Mu i Mo str.PRAWA |
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g`2r = |
11.33 |
[ kN/m2] |
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do obl. Mu i Mo str.LEWA |
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g`2r = |
9.27 |
[ kN/m2] |
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` |
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spójność gruntu |
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cun = |
28 |
[ kN / m3 ] |
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współczynnik obciążenia |
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gm = |
1.1 |
zwiększający |
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współczynnik obciążenia |
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gm = |
0.9 |
zmniejszający |
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cur = |
30.8 |
[ kN/m2] |
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do obl. Mu i Mo |
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cur = |
25.2 |
[ kN/m2] |
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OBLICZENIA: |
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Położenie osi obrotu przyjęto w kolejnym przybliżeniu: x = 1,5 m ; y = 1,5 m |
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Promień walcowej powierzchni poślizgu przy założeniu, że przechodzi ona przez |
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krawędź ściany oporowej: |
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r = |
10.06 |
[ m ] |
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- Podział na obliczeniowe bloki gruntu lub betonu ściany: |
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b = |
1.006 |
[ m ] |
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kąt między środkiem okręgu a punktem A: |
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aA = |
45.92 |
o |
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kąt między środkiem okręgu a punktem B: |
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aB = |
81.43 |
o |
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odległość między osią OC a punktem A |
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e = |
7.23 |
[ m ] |
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odległość między osią OC a punktem B |
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f = |
9.95 |
[ m ] |
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Obliczenia opierają się na założeniu że: |
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Wartości obliczeniowe obciążeń i parametrów geotechnicznych F ur i g` r po stronie lewej |
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określa się dla g m < 1 , po stronie prawej F ur dla g m < 1 i g r dla g m > 1 oraz ciężar |
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właściwy ściany oporowej i obciążenia naziomu dla g f > 1 |
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- obliczenia pomocnicze |
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U W A G A ! N I E Z M I E N I A Ć W A R T O Ś C I W T A B E L I |
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rodzaj |
blok |
odległość |
sin a1 = |
a1 |
cos a1 = |
w= |
y= |
h gr2 |
h betonu |
h gr1 |
obc.naziomu |
1.5 |
x |
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warstw |
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od osi |
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[ stopnie ] |
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[ m ] |
[ m ] |
z wodą |
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z wodą |
bez wody |
[ kN/m] |
1.5 |
y |
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9.95 |
0.989 |
81.43 |
0.149 |
8.56 |
0.00 |
- |
- |
0.00 |
0.00 |
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gr1+naz |
18 |
9.60 |
0.954 |
72.47 |
0.301 |
7.03 |
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b = |
0.71 |
12 |
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9.24 |
0.918 |
66.68 |
0.396 |
6.08 |
2.48 |
- |
- |
0.98 |
1.50 |
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9.24 |
0.918 |
66.68 |
0.396 |
6.08 |
2.48 |
- |
- |
0.98 |
1.50 |
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gr1+naz |
17 |
8.74 |
0.868 |
60.26 |
0.496 |
5.07 |
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b = |
1.01 |
12 |
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8.23 |
0.818 |
54.917 |
0.575 |
4.279 |
4.28 |
- |
- |
2.78 |
1.50 |
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8.23 |
0.818 |
54.92 |
0.575 |
4.28 |
4.28 |
- |
- |
2.78 |
1.50 |
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gr1+naz |
16 |
7.73 |
0.768 |
50.20 |
0.640 |
3.62 |
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b = |
1.01 |
12 |
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7.23 |
0.72 |
45.92 |
0.696 |
3.06 |
5.50 |
- |
- |
4.00 |
1.50 |
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7.23 |
0.718 |
45.92 |
0.696 |
3.06 |
0.00 |
0.00 |
- |
4.0 |
1.5 |
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gr2+gr1+naz |
15 |
6.88 |
0.684 |
43.17 |
0.729 |
2.72 |
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b = |
0.69 |
12 |
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6.54 |
0.65 |
40.54 |
0.760 |
2.42 |
0.65 |
0.65 |
- |
4.0 |
1.5 |
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6.54 |
0.650 |
40.54 |
0.760 |
2.42 |
0.65 |
0.65 |
- |
4.0 |
1.5 |
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gr2+gr1+naz |
14 |
6.04 |
0.600 |
36.87 |
0.800 |
2.01 |
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b = |
1.01 |
12 |
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5.53 |
0.55 |
33.37 |
0.835 |
1.66 |
1.40 |
1.40 |
- |
4.0 |
1.5 |
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5.53 |
0.550 |
33.37 |
0.835 |
1.66 |
1.40 |
1.40 |
- |
4.0 |
1.5 |
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gr2+gr1+naz |
13 |
5.03 |
0.500 |
30.00 |
0.866 |
1.35 |
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b = |
1.01 |
12 |
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4.53 |
0.45 |
26.74 |
0.893 |
1.08 |
1.99 |
1.99 |
- |
4.0 |
1.5 |
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4.53 |
0.450 |
26.74 |
0.893 |
1.08 |
1.99 |
1.99 |
0.00 |
4.0 |
1.5 |
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gr2+gr1+naz |
12b |
4.51 |
0.449 |
26.65 |
0.894 |
1.07 |
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b = |
0.03 |
12 |
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4.50 |
0.45 |
26.57 |
0.89 |
1.06 |
2.00 |
2.00 |
0.00 |
4.0 |
1.5 |
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4.50 |
0.447 |
26.57 |
0.894 |
1.06 |
2.00 |
0.00 |
7.50 |
0 |
0 |
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gr2+bet |
12a |
4.01 |
0.399 |
23.49 |
0.917 |
0.83 |
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b = |
0.98 |
0 |
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3.52 |
0.35 |
20.49 |
0.94 |
0.64 |
2.43 |
0.43 |
7.50 |
0 |
0 |
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3.52 |
0.350 |
20.49 |
0.937 |
0.64 |
2.43 |
0.43 |
7.50 |
- |
- |
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gr2+bet |
11 |
3.02 |
0.300 |
17.46 |
0.954 |
0.46 |
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b = |
1.01 |
- |
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2.52 |
0.25 |
14.48 |
0.97 |
0.32 |
2.74 |
0.74 |
7.50 |
- |
- |
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2.52 |
0.250 |
14.48 |
0.968 |
0.32 |
2.74 |
0.74 |
7.50 |
- |
- |
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gr2+bet |
10 |
2.01 |
0.200 |
11.54 |
0.980 |
0.20 |
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b = |
1.01 |
- |
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1.51 |
0.15 |
8.63 |
0.99 |
0.11 |
2.95 |
0.95 |
7.50 |
- |
- |
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1.51 |
0.150 |
8.63 |
0.989 |
0.11 |
2.95 |
0.95 |
7.50 |
- |
- |
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gr2+bet |
9b |
1.50 |
0.150 |
8.60 |
0.989 |
0.11 |
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b = |
0.01 |
- |
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1.50 |
0.149 |
8.57 |
0.989 |
0.11 |
2.95 |
0.95 |
7.50 |
- |
- |
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1.50 |
0.149 |
8.57 |
0.989 |
0.11 |
2.95 |
2.95 |
- |
- |
- |
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gr2 |
9a |
1.00 |
0.100 |
5.71 |
0.995 |
0.05 |
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b = |
1.00 |
- |
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0.50 |
0.050 |
2.87 |
0.999 |
0.01 |
3.05 |
3.05 |
- |
- |
- |
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0.50 |
0.050 |
2.87 |
0.999 |
0.01 |
3.05 |
3.05 |
- |
- |
- |
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gr2 |
8 |
0.00 |
0.000 |
0.00 |
1.000 |
0.00 |
0.00 |
b = |
1.01 |
- |
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-0.50 |
-0.05 |
-2.87 |
1.00 |
0.01 |
3.05 |
3.05 |
- |
- |
- |
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-0.50 |
-0.050 |
-2.87 |
0.999 |
0.01 |
3.05 |
3.05 |
- |
- |
- |
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gr2 |
7 |
-1.01 |
-0.100 |
-5.74 |
0.995 |
0.05 |
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b = |
1.01 |
- |
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-1.51 |
-0.15 |
-8.63 |
0.99 |
0.11 |
2.95 |
2.95 |
- |
- |
- |
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-1.51 |
-0.150 |
-8.63 |
0.989 |
0.11 |
2.95 |
2.95 |
- |
- |
- |
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gr2 |
6 |
-2.01 |
-0.200 |
-11.54 |
0.980 |
0.20 |
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b = |
1.01 |
- |
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-2.52 |
-0.25 |
-14.48 |
0.97 |
0.32 |
2.74 |
2.74 |
- |
- |
- |
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-2.52 |
-0.250 |
-14.48 |
0.968 |
0.32 |
2.74 |
2.74 |
- |
- |
- |
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gr2 |
5 |
-3.02 |
-0.300 |
-17.46 |
0.954 |
0.46 |
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b = |
1.01 |
- |
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-3.52 |
-0.35 |
-20.49 |
0.94 |
0.64 |
2.43 |
2.43 |
- |
- |
- |
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-3.52 |
-0.350 |
-20.49 |
0.937 |
0.64 |
2.43 |
2.43 |
- |
- |
- |
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gr2 |
4 |
-4.02 |
-0.400 |
-23.58 |
0.917 |
0.84 |
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b = |
1.01 |
- |
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-4.53 |
-0.45 |
-26.74 |
0.89 |
1.08 |
1.99 |
1.99 |
- |
- |
- |
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-4.53 |
-0.450 |
-26.74 |
0.893 |
1.08 |
1.99 |
1.99 |
- |
- |
- |
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gr2 |
3 |
-5.03 |
-0.500 |
-30.00 |
0.866 |
1.35 |
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b = |
1.01 |
- |
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-5.53 |
-0.55 |
-33.37 |
0.84 |
1.66 |
1.40 |
1.40 |
- |
- |
- |
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-5.53 |
-0.550 |
-33.37 |
0.835 |
1.66 |
1.40 |
1.40 |
- |
- |
- |
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gr2 |
2 |
-6.04 |
-0.600 |
-36.87 |
0.800 |
2.01 |
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b = |
1.01 |
- |
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-6.54 |
-0.65 |
-40.54 |
0.76 |
2.42 |
0.65 |
0.65 |
- |
- |
- |
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-6.54 |
-0.650 |
-40.54 |
0.760 |
2.42 |
0.65 |
0.65 |
- |
- |
- |
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gr2 |
1 |
-6.77 |
-0.673 |
-42.26 |
0.740 |
2.62 |
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b = |
0.69 |
- |
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-7.23 |
-0.718 |
-45.92 |
0.696 |
3.06 |
0.00 |
0.00 |
- |
- |
- |
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0.69 |
1.01 |
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- Moment obracający |
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n = ilość bloków |
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G i = ciężar bloku |
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a i = kąt - wielkość geometryczna |
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- Moment utrzymujący |
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F i = kąt tarcia wewnętrznego gruntu na odcinku L i |
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c i = spójność gruntu na odcinku L i |
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Obliczenia dokonano w poniższej tabeli. |
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W Y N I K I |
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nr bloku |
G i |
a i |
sin a i |
B i = |
cos a i |
f ir |
tg f ir |
G i* cos a i* |
c i |
L i = |
c i * L i |
T i |
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Gi*sin a i |
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* tg f ir |
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b i / cos a i |
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[ kN ] |
[ stopnie ] |
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[ kN ] |
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[ kPa ] |
[ m ] |
[ kPa * m ] |
[ kN ] |
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1 |
2.07 |
-42.26 |
-0.673 |
-1.39 |
0.740 |
17.1 |
0.308 |
0.47 |
25.2 |
0.93 |
23.42 |
23.89 |
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2 |
9.56 |
-36.87 |
-0.600 |
-5.74 |
0.800 |
17.1 |
0.308 |
2.35 |
25.2 |
1.26 |
31.69 |
34.05 |
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3 |
15.81 |
-30.00 |
-0.500 |
-7.90 |
0.866 |
17.1 |
0.308 |
4.21 |
25.2 |
1.16 |
29.28 |
33.49 |
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4 |
20.61 |
-23.58 |
-0.400 |
-8.25 |
0.917 |
17.1 |
0.308 |
5.81 |
25.2 |
1.10 |
27.67 |
33.48 |
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5 |
24.11 |
-17.46 |
-0.300 |
-7.23 |
0.954 |
17.1 |
0.308 |
7.08 |
25.2 |
1.05 |
26.58 |
33.66 |
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6 |
26.54 |
-11.54 |
-0.200 |
-5.31 |
0.980 |
17.1 |
0.308 |
8.00 |
25.2 |
1.03 |
25.88 |
33.88 |
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7 |
27.98 |
-5.74 |
-0.100 |
-2.80 |
0.995 |
17.1 |
0.308 |
8.57 |
25.2 |
1.01 |
25.48 |
34.05 |
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8 |
28.45 |
0.00 |
0.000 |
0.00 |
1.000 |
17.1 |
0.308 |
8.75 |
25.2 |
1.01 |
25.36 |
34.11 |
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9a |
33.88 |
5.71 |
0.100 |
3.37 |
0.995 |
17.1 |
0.308 |
10.37 |
25.2 |
1.00 |
25.25 |
35.62 |
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9b |
1.94 |
8.60 |
0.150 |
0.29 |
0.989 |
17.1 |
0.308 |
0.59 |
25.2 |
0.01 |
0.24 |
0.83 |
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10 |
208.86 |
11.54 |
0.200 |
41.77 |
0.980 |
17.1 |
0.308 |
62.96 |
25.2 |
1.03 |
25.88 |
88.83 |
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11 |
205.90 |
17.46 |
0.300 |
61.77 |
0.954 |
17.1 |
0.308 |
60.42 |
25.2 |
1.05 |
26.58 |
87.01 |
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12a |
196.09 |
23.49 |
0.399 |
78.16 |
0.917 |
17.1 |
0.308 |
55.32 |
25.2 |
1.07 |
26.88 |
82.21 |
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12b |
2.79 |
26.65 |
0.449 |
1.25 |
0.894 |
17.1 |
0.308 |
0.77 |
25.2 |
0.03 |
0.79 |
1.55 |
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13 |
97.25 |
30.00 |
0.500 |
48.63 |
0.866 |
17.1 |
0.308 |
25.91 |
25.2 |
1.16 |
29.28 |
55.19 |
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14 |
89.62 |
36.87 |
0.600 |
53.77 |
0.800 |
17.1 |
0.308 |
22.06 |
25.2 |
1.26 |
31.69 |
53.75 |
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15 |
55.79 |
43.17 |
0.684 |
38.17 |
0.729 |
17.1 |
0.308 |
12.52 |
25.2 |
0.94 |
23.76 |
36.28 |
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16 |
71.99 |
50.20 |
0.768 |
55.31 |
0.640 |
27.0 |
0.510 |
23.48 |
0.0 |
1.57 |
0.00 |
23.48 |
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17 |
57.28 |
60.26 |
0.868 |
49.74 |
0.496 |
27.0 |
0.510 |
14.48 |
0.0 |
2.03 |
0.00 |
14.48 |
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18 |
21.36 |
72.47 |
0.954 |
20.37 |
0.301 |
27.0 |
0.510 |
3.28 |
0.0 |
2.36 |
0.00 |
3.28 |
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suma |
413.98 |
= Mo |
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suma |
743.10 |
= Mu |
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- Warunek stateczności w metodzie Felleniusa: |
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m - współczynnik korekcyjny dla obciążeń i parametrów gruntu obliczeniowych, należy przyjmować wg PN-83/B-03010 |
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"Ściany oporowe i projektowanie" tab.11. |
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m = |
0.9 |
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413.98 |
< |
668.79 |
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STATECZNOŚĆ OGÓLNA UKŁADU ŚCIANA OPOROWA - USKOK JEST ZACHOWANA |
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