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Recommended
Guideline Specifications for Permanent
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1.
Soil nail assemblies – Soil nail assemblies and test soil nail assemblies,
consist of installing and grouting steel bars in holes drilled in natural
foundation materials. Anchorage system, and testing of test soil nail
assemblies, shall conform to the details shown on the plans and these special
provisions.
2.
Contract drawings: Contract drawings shall show the location,
procedure and layout of the soil nail installation. This includes the pattern, spacing, type, size and lengths of the
nails, as well as, the required drill hole diameter, embedment depths, and the
angled inclination of the soil nails.
The drawings shall also indicate other details such as anchor plate
size, any additional required corrosion protection for the nail and its
components, minimum concrete cover over the bar and the end of the nail, spacing
of centralizers, and test nail details, if required.
2.1
Submittals-Prior to starting the work, shop drawings when necessary, as well
as, related data such as catalog cuts, product details, and brochures, shall be
submitted to the engineer for review.
3.0
Materials –Soil nails shall be furnished complete with all accessories, and
shall be a standard product of a company regularly engaged in their
manufacture. When required, a
certificate of compliance and copies of the certified mill report of the soil
nail steel, will verify that the nails conform to requirements of this
specification. The materials specified
below shall be used for construction of soil nail assemblies and test soil nail
assemblies.
3.1
Reinforcing Steel used for soil nail assembly shall be either:
3.1.2.
Solid Reinforcing Steel bar that conforms to ASTM A615 (grade 60 & 75) and
ASTM A722 (grade 150). Bars
will have: a continuous rolled-in pattern of thread-like deformations along
their entire length or can be rolled thread for a minimum 6 inches on the
anchorage and splice end. Cutting of
the threads onto the steel bar will not be allowed.
See table titled “Reinforcing Steel Properties ASTM A615 (Grade 60
&75) and Prestressing Steel Properties ASTM A722 (Grade 150)
Reinforcing Steel Properties ASTM A615 (Grade 60
& 75)
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Threadbar
Designation |
Yield
Stress |
Cross
Sectional Area |
Yield
Strength |
Nominal
Weight |
Max. Threadbar Diameter[D1] |
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|
in-lb. |
mm |
ksi |
Mpa |
in2 |
mm2 |
kips |
kN |
lbs/lf |
kg/m |
in |
mm |
|
60 |
#6 |
19 |
60 |
414 |
.44 |
284 |
26.4 |
118 |
1.50 |
2.24 |
0.86 |
21.8 |
|
60 |
#7 |
22 |
60 |
414 |
0.60 |
387 |
36.0 |
160 |
2.04 |
3.04 |
0.99 |
25.1 |
|
60 |
#8 |
25 |
60 |
414 |
0.79 |
510 |
47.4 |
211 |
2.67 |
3.98 |
1.12 |
28.4 |
|
75 |
#6 |
19 |
75 |
517 |
0.44 |
284 |
33.0 |
147 |
1.50 |
2.24 |
0.86 |
21.8 |
|
75 |
#7 |
22 |
75 |
517 |
0.60 |
387 |
45.0 |
200 |
2.04 |
3.04 |
0.99 |
25.1 |
|
75 |
#8 |
25 |
75 |
517 |
0.79 |
510 |
59.3 |
264 |
2.67 |
3.98 |
1.12 |
28.4 |
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75 |
#9 |
29 |
75 |
517 |
1.00 |
645 |
75.0 |
334 |
3.40 |
5.06 |
1.26 |
32.0 |
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75 |
#10 |
32 |
75 |
517 |
1.27 |
819 |
95.3 |
424 |
4.30 |
6.41 |
1.43 |
36.3 |
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75 |
#11 |
36 |
75 |
517 |
1.56 |
1006 |
117.0 |
520 |
5.31 |
7.91 |
1.61 |
40.9 |
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75 |
#14 |
43 |
75 |
517 |
2.25 |
1452 |
168.8 |
751 |
7.65 |
11.39 |
1.86 |
47.2 |
Prestressing Steel Properties ASTM A-722
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Grade |
Nominal Bar Diameter |
Cross Section Area |
Ultimate Strength |
Weight |
Max Bar Diameter |
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in |
mm |
in2 |
mm2 |
kips |
KN |
lbs/ft |
kg/m |
in |
mm |
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150 |
1 |
26 |
0.85 |
548 |
127.5 |
567 |
3.01 |
4.48 |
1.20 |
30.5 |
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150 |
1 1/4 |
32 |
1.25 |
806 |
187.5 |
834 |
4.39 |
6.54 |
1.46 |
37.1 |
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150 |
1 3/8 |
36 |
1.58 |
1018 |
237 |
1055 |
5.56 |
8.28 |
1.63 |
41.4 |
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150 |
1 3/4 |
46 |
2.62 |
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