A CPT test was conducted at a site that consists of normally consolidated sand with some interbedded silts. The CPT profile is approximated into uniform soil layers with constant cone-bearing, as shown in Table 01. The modulus of elasticity for the soils can be approximated by E= 3.5qc. The groundwater table is at a depth of 2.5m below the ground surface, and the total unit weight y=18 kN/m³ above and y=18.81kN/m³ below the GWT. A 30m x 2.5m strip footing founded at a depth of 2m in this soil has to carry a load of 15MN. Use Schmertmann's strain influence factor method to determine the settlement of this footing a) Immediately after, and b) 50 years after construction.
A CPT test was conducted at a site that consists of normally consolidated sand with some interbedded silts. The CPT profile is approximated into uniform soil layers with constant cone-bearing, as shown in Table 01. The modulus of elasticity for the soils can be approximated by E= 3.5qc. The groundwater table is at a depth of 2.5m below the ground surface, and the total unit weight y=18 kN/m³ above and y=18.81kN/m³ below the GWT. A 30m x 2.5m strip footing founded at a depth of 2m in this soil has to carry a load of 15MN. Use Schmertmann's strain influence factor method to determine the settlement of this footing a) Immediately after, and b) 50 years after construction.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Q 1:
A CPT test was conducted at a site that consists of
Depth (m)
9.(MPa)
2.1
normally consolidated sand with some interbedded
Layer No
1.
2-3
silts. The CPT profile is approximated into uniform
3-5
3.4
soil layers with constant cone-bearing, as shown in
3
5-6
4.5
Table 01. The modulus of elasticity for the soils can
6-7
6.8
be approximated by E = 3.5qc. The groundwater
7-8
5.8
table is at a depth of 2.5m below the ground surface,
8-9
6.2
and the total unit weight y=18 kN/m³ above and
7.
9-12
8.6
y=18.81kN/m below the GWT. A 30m x 2.5m strip
8.
12-13
9.
footing founded at a depth of 2m in this soil has to
Table 1
carry a load of 15MN. Use Schmertmann's strain
influence factor method to determine the settlement
of this footing
a) Immediately after, and
b) 50 years after construction.
n 00 00
Nm46 6 00
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