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302

//

.

2013

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: , /

:

o

o

o

o

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1. ( )

2. /

+

+

=

= = , =

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o () () :

() :

wwsat hz +=

o () 2 :

1. = ()

2.

= ()

'

u +=

o () :

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() :

:

=

= + (+)

= ( )

= =

( )zhu ww +=

, , .

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wwsat hz += ( )zhu ww += =

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+

:

=

dTcosh4

dwc

2

=

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d)(hhcsatbulk

++= du w= =

()

()

()

+++

cwhu =

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,

.

1.5 m

2.5 m

5.0 m

GS

GWT Sand

Clay

dry = 1.70 t/m3

sat = 1.85 t/m3

sat = 2.00 t/m3

Sand

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1.5 m

2.5 m

5.0 m

GS

GWT Sand

Clay

dry = 1.70 t/m3

sat = 1.85 t/m3

sat = 2.00 t/m3

1

2

3

4

v (t/m2)u (t/m2)v (t/m

2)Point

0001

2.55-0=2.5501.7x1.5=2.552

7.175-2.5=4.6751x2.5=2.52.55+1.85x2.5=7.1753

17.175-7.5=9.6751x7.5=7.57.175+2.0x5.0 =17.1754

Sand

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( )

/

+

+

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()

(/2)

a = ?

a = ?

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()

.

()

o

o

/

, (/)

= /2 (/)

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.

. .

(/2)

a = ?

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(/2)

.

(/2)

.

=

, ,

o

o

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:

o = 1 = 2.5

, :

o () 2.5/ ()

o () 2.5/ ()

= /200

a

Total number of divisions

within the chart = 200

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():

=

GSq (t/m2)

a

zElev.

qnet = q

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, ,

.

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At point (a)

(t/m2)f(r/z)r/zr (m)z (m)Load (t)Load

0.0180.01531.7211.186.550P1

0.0810.02291.54106.5150P2

0.0991a

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(t/m2)f(r/z)r/zr (m)z (m)Load (t)Load

0.0070.0062.1814.146.550P1

0.0540.01531.7211.186.5150P2

0.0611b

At point (b)

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(t/m2)f(r/z)r/zr (m)z (m)Load (t)Load

0.0180.01531.7211.186.550P1

0.0130.00382.4315.86.5150P2

0.0311c

At point (c)

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qnet = q h = 20 1.70x1.0 = 18.3 t/m2

Use Newmarks chart

z = 5.5 m = 1 = 2.5 cm

L = 10 m 10x2.5/5.5 = 4.54 cm, B = 10 m 10x2.5/5.5 = 4.54 cm,

na = 128 2a = n/200 (qnet) = 128/200 x 18.3 = 11.7 t/m2

nb = 74 2b = n/200 (qnet) = 74/200 x 18.3 = 6.77 t/m2

nc = 47 2c = n/200 (qnet) = 47/200 x 18.3 = 4.3 t/m2

abc

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:

a =1a +2a = 0.099 + 11.7 = 11.8 t/m2

b =1b +2b = 0.061 + 6.77 = 6.83 t/m2

c =1c +2c = 0.031 + 4.3 = 4.33 t/m2