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Kondisi dengan rembesan -M.A.T di permukaan tanah
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W
A
B
T
S
Q
P
H
b
Bidang longsorHcos2
m.a.t
Berat elemen tanah PQTS per
1 m:
( )( )
( )
( )
sinsin
coscos
1
21
21
21
bHbHWT
bHbHWN
bHbHW
bsata
bsata
bsat
+==
+==
+=
( )
( )
sinsin
coscos
21
21
bHbHWT
bHbHWN
bsatr
bsatr
+==
+==
Padalah gaya reaksi yang besar nya sama dengan
berat tanah (W), maka nilaiNrdan Tr:
V
b
sat
H1
H2
Kondisi dengan rembesan -M.A.T di kedalaman tertentu
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Tegangan normal dan tegangan geser
pada bidang AB per satuan lebar :
( )( )( )
( ) ( )
( )( )( )
( ) ( )
cossin
cos
sin
1cos
coscos
cos
1cos
21
21
2
21
21
HHb
bHbH
b
T
HHb
bHbH
b
N
bsatbsata
d
bsat
bsata
+=+
==
+=+
==
Dengan memberikan fakator aman padamasing-masing komponen kuat geser :
( ) ( )( )
tantan
cossin 21
21
'
21 HH
HHHHcf
bsat
b
bsat
s+
++
+
=
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