Environmental Engineering Reference
In-Depth Information
FIGURE 7.82
Drumlins on a till plain (Palmyra, New York). (Courtesy of USGS.)
Depth
a. Columbus,
Ohio
b. Demarest,
New Jersey
c. Weymouth,
Massachusetts
d. Edison Township,
New Jersey
mft
N
N
N
N
30
Brown gravelly
clayey sand
4
9
45
57
80
Miscellaneous fill-
sand, cinders
Brown gravelly sand
Brown-gray
gravelly,
sandy, silty
clay (mottled)
40
Brown sandy
gravel, trace
clayey silt
Refusal
100
30
80
Gray gravelly
silty sand
Boulders of
dolomite,
gneiss
82
20
Brown gravelly
sandy, clayey,
silt (more
gravelly than
stratum 1)
80
100
10
100
Gravelly sand
Pink granite
95%
50/5 in
40
Peat layer
60/5 in
60
20
80/6 in
65/6 in
80
19
Legend:
N = Standard penetration test value
% = Percent core recovery
= Groundwater level
25%
Limestone
with
cavities
(a)
30
100
80%
(b)
(c)
(d)
FIGURE 7.83
Logs of typical test borings in till. (Courtesy of Joseph S. Ward and Associates.)
Figure 7.83. The high SPT values are common in till and indicative of its high strength and
relative incompressibility. In New York and New Jersey, allowable foundation bearing val-
ues of the order of 8 to 12 tsf are common.
