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Desk Study of a new bridge for the New Jersey Turnpike
Authority over the Hackensack River
1
Contents
Desk Study of a new bridge for the New Jersey Turnpike Authority over the Hackensack River 1
Desk Study of a new bridge for the New Jersey Turnpike Authority over the Hackensack River 3
1.
Study Area .............................................................................................................................. 3
1.1
Literature Survey .............................................................................................................. 4
1.1.1
Topology ................................................................................................................... 4
1.1.2
Bore Holes ................................................................................................................ 4
1.2
Subsurface stratification ................................................................................................... 5
1.2.1
Bedrock geology of New Jersey ............................................................................... 5
1.3 Proposed subsurface soil investigation ................................................................................. 6
1.3.1
Bore holes......................................................................................................................... 7
1.3.2
Rock quality designation .................................................................................................. 8
1.3.3
Soil sampling .................................................................................................................... 8
1.3.4
Water Table ...................................................................................................................... 9
APPENDIX ............................................................................................................................... 10
2
Desk Study of a new bridge for the New Jersey Turnpike
Authority over the Hackensack River
1. Study Area
The Desk Study of a new bridge for the New Jersey Turnpike Authority over the Hackensack
River) near Vince Lombardi service Area. The project is located at the following coordinates as
shown in figure 1;
Start of bridge 40o49’9.52”N 74o2’21.43”W
End of bridge 40o49’31.99”N 74o1’36.56”W
Figure 1 Bridge location for the New Jersey Turnpike Authority
The bridge will carry eight -12 ft lanes, two-8 ft shoulder and one-4ft sidewalk. So the total width
of bridge is 116 ft. The overall length of bridge is 4147ft, which calculated from Google map. The
maximum span length is 250 ft.
The number of span will be 4147 / 250 = 16.5 = 17 lanes.
The designed criteria for design was AASHTO.
3
1.1 Literature Survey
1.1.1 Topology
From the topographic survey and Google map it was shown that bridge is crossing the Hackensack
river and heavy trucks are being parked as shown in appendix.
1.1.2 Bore Holes
From Geotechnical Data Management System (GDMS) Viewer, total four bore holes are located
with the name of 400P-1, 400P-2, 400P-24,400 W-59 as shown in figure 2 and 3. The bore hole
shown that soil was present from dark CF sand, silt and brown CF gravel present on up to 8.5 ft
depth in bore hole number 400 W-59. The excavation was done up to 40ft. The soil strata has been
shown in appendix.
Figure 2 Location of bore holes
4
Figure 3 Bore holes names
1.2 Subsurface stratification
1.2.1 Bedrock geology of New Jersey
U. S. Geological Survey 7.5-minute topographic quadrangles as base maps found that solid rock
or Coastal Plain Formations present beneath any soil, surficial deposit or other surface cover. In
some locations it may be exposed at the surface.
Figure 4 Soil strata
5
From web soil survey of US department of agriculture, it was found that Timakwa muck only 0 to
2 percent slopes was frequently flooded. The Boonton moderately well drained gravelly loam was
present from 3 to 8 percent slopes. The detail of soil data is attached in appendix.
The surficial deposits in the Hackensack bridge site include alluvial, swamp and stream terrace
deposits, river mud clay and rock are present as shown in figure 5.
Figure 5 Soil classification of Hackensack River.
1.3 Proposed subsurface soil investigation
The subsurface soil investigation for soil will be boring and CPT. Boring and CPT test on soil are
more reliable and economical for soil investigation. As the width of bridge is 116ft.As per code,
we can excavate up...