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ΔΙΑΛΕΞΕΙΣ ΤΟΥ ΜΑΘΗΜΑΤΟΣ « ΘΕΜΕΛΙΩΣΕΙΣ » 7ο Εξ. ΠΟΛ-ΜΗΧ. ΕΜΠ - Ακαδ. Ετος 200 7 - 0 8. ΔΙΑΛΕΞΗ 12 Θεμελιώσεις με πασσάλους : Ομάδες πασσάλων. 21.12.2007. 1. Κατηγορίες πασσάλων 2. Αξονική φέρουσα ικανότητα μεμονωμένου πασσάλου 2.1 Εμπηγνυόμενοι πάσσαλοι (πάσσαλοι εκτοπίσεως) - PowerPoint PPT Presentation

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• 12 : 7 . -. - . 2007 - 0821.12.2007

• 1. 2. 2.1 ( )2.2 ()2.3 73. 4. 4.1 4.2 4.3 5.

• 4. 4.1 1. ( ) : , . - . , , ( ).

• 4. 4.1 2. ( ) : (Qpu) ( , ). (Qsu) . (Qsu) Converse-Labarre (Qsu,g= , = m x n , D, s ) : :

• 4. 4.1 2. ( ) : : Converse-Labarre :Qsu,g= , m x n = m x n = D = s = : .. f ( )

• 4. 4.1 2. ( ) : , Bg x Lg x D (Qu,b) : Bg x Lg (D) (D)., :

• 4. 4.1 : n , : . .

• 4. 4.2 : (n) : R ( = R / n ) (x) (Pi) (xi) () R = ex = x-x-

• 4. 4.2 R = ex = (i) : : : :

• 4. 4.2 (i) : : R = ex = (x) ey = (y) K = xi, yi = (i) ( )

• 4. 4.2 : (6) . R = 10000 kNn = 6 , ex = -2m , ey = 1mx1 = 6m , y1 = -1.5mx2 = 0m , y2 = -1.5mx3 = -6m , y3 = -1.5mx4 = 6m , y4 = 1.5mx5 = 0m , y5 = 1.5mx6 = -6m , y6 = 1.5m (i) :144 m213.5 m2P1 = - 278 kNP2 = 556 kNP3 = 1389 kNP4 = 1944 kNP5 = 2778 kNP6 = 3611 kN : Pi = R

• 4. 4.3 , ( ).g = n Pg = = = Pg / n (n=2) (Ep = )4.3.1 Ep = Poulos (1971)

• 4. 4.3 (n=2).Ep = E = d = s = :4.3.1 Ep Poulos (1971)

• 4.3 4.3.2 Poulos (1971)g = n ( )Pg = = = Pg / np = = ()= 2 x 2= 3 x 3= 4 x 4= 5 x 5L/ds/d

• 4.3 4.3.2 Poulos (1971)g = n ( )Pg = = = Pg / np = = ()= 2 x 2= 3 x 3= 4 x 4= 5 x 5L/ds/d

• 4.3 4.3.2 Poulos (1971)g = n Pg = = = Pg / n Rs(n) ( ) n n = 4, 9, 16, 25 : Rs n

• 4. 4.3 B x L = 2/3 D (D = )2/3 D 60 4.3.3 Terzaghi

• 4. 4.3 B x L = 2/3 D 2/3 D4.3.3 TerzaghiD = ) ( 1.5 ) ( i), , . :

• 4.3 4.3.3 Terzaghi Janbu, Bjerrum & Kjaersli ( ) :i = = (D) 1 = () u = L , = ( L B )q = q qo = q D : D 2/3 Christian & Carrier (1978)

• 4.3 4.3.3 Terzaghi Janbu, Bjerrum & Kjaersli ( ) :q = q qo = q D1 = () :D 2/3 1 Christian & Carrier (1978)

• 4.3.3 Terzaghi

• 4.3.3 Terzaghi