1) A 30-ft x 30-ft square mat foundation will be constructed at ground surface. The subsoil profile is shown in the figure. The average stress increase due to mat foundation in clay layer is 360 psf. The primary consolidation settlement (in.) of the clay layer directly below the center of the mat is most nearly: a. 0.2 b. 1.0 c. 2.1 d. 3.6 ORIGINAL GROUND SURFACE BLEV DR a. 3.9 b. 3.3 C. 4.8 d. 4.4 ELEV-st ELEV-13 6 4 ELEV-23 301 MIT FOUNDATION Y* 105 pd GROUNDWATER TABLE == SAND yo 115 pdf 4 MI NORMALLY CONSOLIDATED CLAY SATURATED UNIT WEIGHT 95 pel COMPRESSION NOEX-3.29 VOID RATIO 19 318 SAND ww NOT TO SCALE 2) Assume that the primary consolidation in the previous question is 5 in. what is the primary consolidation (in.) taking into account the three-dimensional effect. (A = 0.6).
1) A 30-ft x 30-ft square mat foundation will be constructed at ground surface. The subsoil profile is shown in the figure. The average stress increase due to mat foundation in clay layer is 360 psf. The primary consolidation settlement (in.) of the clay layer directly below the center of the mat is most nearly: a. 0.2 b. 1.0 c. 2.1 d. 3.6 ORIGINAL GROUND SURFACE BLEV DR a. 3.9 b. 3.3 C. 4.8 d. 4.4 ELEV-st ELEV-13 6 4 ELEV-23 301 MIT FOUNDATION Y* 105 pd GROUNDWATER TABLE == SAND yo 115 pdf 4 MI NORMALLY CONSOLIDATED CLAY SATURATED UNIT WEIGHT 95 pel COMPRESSION NOEX-3.29 VOID RATIO 19 318 SAND ww NOT TO SCALE 2) Assume that the primary consolidation in the previous question is 5 in. what is the primary consolidation (in.) taking into account the three-dimensional effect. (A = 0.6).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:1) A 30-ft x 30-ft square mat foundation will be constructed at ground surface. The subsoil
profile is shown in the figure. The average stress increase due to mat foundation in clay
layer is 360 psf. The primary consolidation settlement (in.) of the clay layer directly below
the center of the mat is most nearly:
a. 0.2
b. 1.0
c. 21
d. 3.6
ORIGINAL GROUND
SURFACE BLEV t
a. 3.9
b. 3.3
C. 4.8
d. 4.4
wwwwwwww
ELEV-St
THE WE
ELEV-13
SAND
yo 115 pdf
ELEV-23
MIAT FOUNDATION
GROUNDWATER TABLE
SAND
=
S
+
4 MIN
NORMALLY CONSOLIDATED CLAY
SATURATED
COMPRESS
VOD RATIO=12
308
****
NOT TO SCALE
2) Assume that the primary consolidation in the previous question is 5 in. what is the
primary consolidation (in.) taking into account the three-dimensional effect. (A = 0.6).
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