HomeMy WebLinkAboutCT 72-03; Tri-City Auto Plaza; Soils Report Final; 1973-04-04.,; .,’ BENTON ENGINEERING. INC.
APPLIED *oil. MEC”ANIC8 - FO”NDATIONS
671, CONVO” COURT SAN D,EGO, C4LlFORNIA e21 I I
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PHlLlP HENKING mENTON F”~.IDIWI ClYlL L*er*IL”
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Mr. Howard Hassett
c/o Bridge Motor Inn
1103 North Hill Street
Oceanside, California 92054
Sublect: Project No. 72-lo-3D
April 4, 1973
- LIBRARY ENGINEERING DEPT.
City of Carlsbad
2075 Las Palmas Drive
CarlsbaQ CA92009-4859
Final Report on
Compacted Filled Ground
Tri-Clty Auto Plaza
And Plaza Del iJorte
Carlsbad, California
Dear Mr. Hassett:
This is to report the results of tdsts and observations made in order ta Inspect the
* !Y=tian of filled ground placed on certain areas of the Trl-City Auto Plaza and on the rig #aIf of
Plaza De! Narte between Tri-City Auto Plaza md Palamar Airport Road In Carl&ad, Calif-
ornia. The fills were placed during the period between October 10, 1972 and March 19,
1973.
The approximate areas and depths of filled ground placed under our inspection in accordance
with the opproved specifications are shown on the attached Drawing No. 1, entitled “Loca-
tion of Compacted Filled Ground.” The grading plan used for the plocament of filled ground
was prepared by Associated Engineers.
The final results of Test b;os. 1 to 270, inclusive, were presented in our report dated
March 12, 1972. The results of tests taken during the final site grading, Numbers 271 ta
277, inclusive, taken on March 19, 1973, are presented on the attached page 9 of the -,Table
of Test Results,” revlrd March 23, 1973. The approximate locations at which the tests were
taken on the Tri-Clty Auto Plaza site are shown on Drawing No. 1. Tests taken an Plaza Del
Norte, south of Trl-City Auto Ploza, ore located according to street stationing. The lcbara-
tory determinations of the maximum dry densities and optimum moisture contents of the major
fill materials am presented on page 10 under the “Labomtary Test Results.” Some of the maxi-
mum dry densittes shown in the “Table of Test Results” were combinations of these.
Existing loose or very moist ta saturated soils wen removed os required at aertain locations in
order to place the compacted filled ground an natuml soils suitable foi support of the proposed
structures and/or filled ground. It should be noted that same loose rolls htie been stockpiled
in mounds above the original ground surface on portions of Lots 6 and 7.
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The final results of tests and obeetvatiom lndlcate that the compacted filled ground within
the approved shaded areas shawir on Drawing No. 1 has been placed at 90 percent of the
maximum dry density or greater. Footings placed on filled ground, unlfatmly compacted to
at least 90 percent of maximum dry density, may be designed in accardanco with the mcom-
mendatiom presented In our reports an Pro/ect No. 72-B-21A, dated September 8, 1972 and
October 16, 1972. If footings are placed closer to the expased slopes than 5 feet inside the
top of compacted filled ground slopes, these should be deepened one foot below a 1 l/2 hori-
zantal ta 1 vertical Ilne projected outward and downward from a point 5 feet horizontally in-
side the top of compacted filled ground slopes.
Respectfully submlttod,
BENTON ENGINEERING, INC.
Reviewed
Distr: (5) Addressee
(1) ksociated Engineers
(1) FM, ‘Jotter, Knauf and Lay
Attentlan: Mr. R. Knauf
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Approx-
imde
Test i.ocatiofl
No. Lot No.
241 1
242 Sto 42 + 50
243 Sta 43 + 50
244 Sta 44 + 50
'245 Sta45+50
246 Sta46+50
247 Sta47+50
248 Sta31 +50
249 Sta 32 +50
250 Sta33+ 50
251 Sta 34+50
252 Sta35+5O
253 Sta 36 + 00
254 Sta37+00
255 Sta38+00
256 Sta 39+ 00
257 Sta40+00
258 Sta 41 + 00
259 Sta 47+ 50
260 Sta 48 + 50
261 Sta 49 + 50
262 Sta 50 + 50
263 Sta52+00
264 Sta 53 + 50
z Sta Sta 56 55 + + 50 00
267 Sta 58 + 00
248 Sta 32+ 00
269 Sta 33 + 00
270 Sta 34+ 00
271 3
272 2
273 2
274 1
275 2
276 3
277 2
Depth
of Fill
at Test
InFeet
Field
Molstufe
%drywt
DV
Den&y
lb/c" ft
Maximum
DV Demity
Ib/cu ft
0.0 10.4 120.8 129.4
1.5 10.8 124.1 127.2
1.0 10.4 125.2 127.2
1.0 10.6 124.8 127.2
1.0 10.8 123.4 127.2
1.0 10.9 125.4 127.2
1.5 7.1 127.2 127.2
1.0 8.8 123.1 127.2
1.0 8.1 124.1 127.2
1.0 8.6 124.2 127.2
1.0 9.4 118.8 125.5
1.0 9.2 123.8 129.4
2.5 8.9 123.8 129.4
1.8 9.1 124.8 129.4
1.5 8.5 120.2 125.5
1.5 8.6 121.5 125.5
1.0 9.1 119.6 125.5
2.0 9.3 122.2 125.5
1.0 10.3 121.5 125.5
1.0 9.9 121.8 125.5
1.5 9.5 121.8 125.5
1.0 9.7 121.1 125.5
1.8 9.6 120.2 125.5
1.5 8.9 126.2 129.4
1.5 8.8 124.8 129.4
2.5 9.7 124.1 129.4
2.5 8.2 123.1 129.4
3.0 10.1 123.5 129.4
3.0 9.7 122.4 125.5
3.0 9.2 124.7 129.4
8.0 11.1 121.9 128.6
8.0 11.9 118.9 128.6
6.0 11.9 117.9 128.6
6.0 il.4 117.3 128.6
6.0 10.9 119.7 128.6
8.0 11.7 116.2 128.6
6.0 11.6 117.7 128.6
TABLE OFTESTRESULTS(CONT.)
Percent
Compation Remarks
93.2
97.5
98.4
98.0
97.0
98.5
100.0
96.6
97.4
97.5
94.6
95.6
95.6
96.3
95.7
23'
97.5
96.9
97.0
97.0
w.5
95.7
97.5
96.4
95.9
95.2
95.4
97.5
w.3
94.9
it75
91.2
93.1
90.5
91.5
Finished Grade
Finlshed Grate
~Finished Grade
Finlshed Grad.
Finished Grad.
Finished Grodr
Finished Gralo
Flnlshed GraA
Finished Grade
Flnlshed Grad.
Finished Grad.
Finished Grade
Finished Grade
Flnished Grad.
Finished Grad.
Finished Grad.
FinIshed Grcde
FinIshed Grade
Flnlshed Grade
Finished Grade
Finished Gmde
Finished Grade
Finished Gmde
Finished Grade
Flnished Gmde
Finished Gmde
BENTON ENLilNLEIING. INC.
~~~~ti’.‘:,:~~~,~~~~~‘, ‘~ . . ~.<Z,.,~~ ~; LABORATORY TEST RESULTS
The maximum dy”&nsitios and optimum n&turn contents of the major fill matrriali Q determined
by the A.S.T.M. D 1557-66T method, that uses 25 blows of a 10 pound mnurmr falling from a
height of 18 in&s an each of 5 layers in a 4 inch diameter l/30 cubic foot compaction cylinder,
au presented as follows:
Maximum Optimum Ms- - Dry Dens&y ture Content
Soil Descriptlan lb/c” ft %drywt
- Dark brown silty fine to medium sand 129.4 8.4
Red-brown clayey fine to medium sand 127.2 10.8
Brawn silty fine to medium sand 125.5 9.2 - Brown silty fine to medium sand 132.6 7.8
Brewn slightly silty fine to medium sand 127.0 8.5
Brown slightly silty fine to medium sand 128.6 8.8 - Light brown slightly silty fine ta medium sand 120.8 9.0
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BENTON~LNGINEERING. IN.2
ACCLILD 501L HEC”ANICI - ,O”ND*T,OI1s
,:$ 6717 CONVO” COURT
_ ,~ .I, SAN ~OIEGO. t*.LIFORNI* St,,,
Tc r;_
. PHILIP HENI(ING BENTON l “T.IDLHT CI”IL LNTIHEI” April 24, 1973 TILLC”.aJ*L CT!., 1)(1,.195,
- Mr. Howard Has&t
c/o Bridge Motor Inn
1103 North Hill Street
Oceanside, California 92054
- Subksct: holed No. 72-lO-3D
Results of Field Density Tests
Taken in Subgrade and Base Materials
Trl-Clty Auto Plaza
Carlsbad, California
Gentlemen: -
RECEIVED
MR25 1973
Cll-Y Or CAHLSBAD
Englneerlng Department
This is ta report the results of field density tests taken in compacted subgm& and base materials
at the subiect site during the period between April 2 and April 18, 1973.
The tests were taken an the dates indicated below:
Date
1 to 10, inclusive April 2, 1973
11 ta 13, inclusive April 4, 1973
14 ta 19, inclusive April 6, 1973
20 to 27, inclusive April 10, 1973
28 to 33, inclusive April 13, 1973
34 to 37, Inclusive April 18, 1973
The approximate locatiom at which the tests wrn taken and the final test msults are presented
an pages2 ta 5 , inclusive, under the “Table of Test Results.” The labamtory determinations
of the maximum dry densltles and optimum maisture contents of the materials are presented on
page 5, under the “Labomtory Test Results.”
Respectfully submitted,
BENTON ENGINEERING, INC.
- Brzs%fz%&xe.-
. . Ramer
Reviewed {j$+$&$%&
Distr: (5) Addressee
(2) City of Carl&ad
Englnoring Department
(1) Fiost,Vothr, Knauf 8 Loy
Attention: Mr. R. Knauf w n Irxlr. ,---
TABLE OF TEST RESULTS
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Test
No.
1
2
3.
4
5
6
7
8
9
Approximate
Location
Depth of
Test Below
Existing Sur-
face in hot
Subgmde Over
Sewer LoteroL
sto. 1 + 43
25’ Eost Of
west curb
S&grade Over
water Lahml,
sto. 4+9O
20’ East of
West curb
Subgrade Over
Storm Dmin,
Sta. 8 +65
9’ East of
West Curb
Subg~,
Sta. 24 +50
15’ East of
West curia
Subgmdo Over
Sewer Main,
Sta. 19+50
Subgrode &tween
Sewer And Water
Latemls,
Sta. 17 + 55
subgmh
Sta. 16+20
10’ East of
west culb
Subgrode,
.90.11+50
12’ East of
west curb
SubarQh
Sta. 0+9OOn
Privote Street
Betwen Lots 7 8 8
0.3
0.2
0.2
0.2
0.3
0.2
0.2
0.2
0.2
Firld DV Moistum DeIlSity
%drywt Ib/cu ft
8.0 120.5
Maximum
DW Density
Ib/cu ft
129.4
Fkrcent
Compaction
93.1
7.2 122.8 129.4 94.8
6.5 122.2 129.4 94.5
7.9 127.3 132.6 96.1
8.7 129.7 132.6 97.8
8.0 123.4 129.4 95.5
8.4 125.9 129.4 97.2
7.4 123.4 129.4 95.5
8.5 123.8 129.4 95.7
FENTON ENGINEE”ING. INC.
Test
No.
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12
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13
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14
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15
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16
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17
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18
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19
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20
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TABLE OF TEST RESULTS (CONT.)
Depth of
Test Below
Approximate Existing Sur-
Location face in Feet
Subgrade, 0.2
Sta. 3 +55
on Private Street
Between Lots 7 8. 8
subgmds,
Sta. 7 +70
West Side
Subgrade,
Sta. 16 +20
West Side
Subgrade,
Sta. 27 + 50
West Side
B-4, sto.30+00
West Side
B-t
Sta. 25 t 00
West Side
Base,
Sta. 20+00
West Side
B-,
Sta. 15 + 00
West Side
Base,
Sta. lo+00
West Side
B-J,
Sta.5tW
West Si&
B-n
Sta. 28 + 00
East Side
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0*
0*
0*
0*
0*
0*
0*
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Field DV DV
Molstum Density Density
%drywt lb/cu ft Ib/cu ft
7.7 123.4 129.4
fbrcant
Compaction
95.5
7.6 124.3 128.6 96.7
8.3 125.3 129.4 96.8
8.0 127.7 128.6 99.3
7.7 133.0 127.5 104.2
5.4 131.5 127.5 103.0
7.3 129.8 127.5 101.7
5.3 125.8 127.5 98.6
5.0 126.0 127;5 98.8
5.6 124.8 127.5 97.8
4.8 126.1 127.5 98.9
l - Indicates Test Was Taken In Ltpper 6 inches Of Existing Subgrade Or
Base course
BENTON ENOINELRING. INC.
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Test
No.
21
22
23
24
25
26
27
28
29
30
31
32
Approximate
Location
B-t
Sta. 23 + 00
Eost Side
B-t
Sta. 18 + 00
East Side
B-r
Sta. 13+W
East Side
B-h
Sta. 8 -k 00
East side
B-b
sta.3+00
East Side
Base,
Sta. 1 + 50 On
Private Street
East Of Plaza Del
Norte,
Sta. 19 + 39
B-J,
Sta. 4+WOn
Private Street
East of Plaza De1
Norh,
Sta. 19+39
Subgmde,
Sta. 33+W
Subgrade,
Sta. 3B+W
subg=h stu. 43+w
subgr=b sta. 48+w
-?wh
Sta. 53 + 00
Dapth of
Test Below
Existing Sur-
face in Feet
0*
0*
0*
0*
0*
o*
0*
0*
0*
0*
0*
0*
Field b DV
MoiShJl8 Density D-b % dry wt Ib/cu ft lb/cu ft
6.0 131.8 127.5
5.0 131.6 127.5
6.7 127.2 127.5
4.8 127.1 127.5
6.0 124.5 127.5
5.3 126.9 127.5
Percent
Compaction
103.2
103.1
99.9
99.7
97.7
99.5
5.0 124.8 127.5 97.9
7.2 124.0 127.2 97.3
5.0 117.0 125.5 93.2
5.4 117.9 125.5 93.9
10.2 119.2 128.6 92.7
6.1 121 .l 128.6 94.3
* - Indkotes Test Was Tdcen In L&er 6 Inches of Existing
Subgmde or Base Course
mP4TON ENOINLLIINO. INC.
TABLE OF TEST RESULTS (CONT.)
-- Test Approximate
No. Location
33 -
34
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35
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37
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Subgmde,
Sta. 58+W
B-t Sta. 37 +W
Base,
Sta. 43 i-W
Base,
Sta. 49+ 00
Base,
Sta. 55 + 00
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Depth of
Test Below
Existing Sur-
face in Feet
0*
0*
Field DV Moisture Density
% dry wt Ib/cu ft
5.0 127.0
5.7 127.9
0* 7.1 126.9
0* 6.8 124.8
0* 6.8 131 .o
Maximum
DV Density
Ib/cu ft
129.4
127.5
127.5
127.5
127.5
l - Indicates Test Was Taken In,Upper 6 Inches of Exlstlng
Subgrade or Bose Course
Percent
Compaction
98.2
loo.2
99.4
97.8
102.8
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LABORATORY TEST RESULTS
- The maximum dry densities and optlmum molstum contents of the motor fill materials as deter-
mined by the A.S.T.M. D 1557&T method, that uses 25 blow of o 10 pound mmmer falling
from a height of 18 inches on each of 5 layers in a 4 inch diameter l/30 cubic foot compaction
cylinder, are presented (II follows:
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Soil Description -
Dark brown silty fine to medium rend
Red-brown clayey fine to medium sand - Brown silty fine to medium sand
Brown silty fine to medium sand
Brown slightly silty fine to medium sond
Brown slightly silty flno ta medium sond
(D. G. Base)
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Maximum Optimum I&is-
Dry Density turn Content
Ib/cu ft %drywt
129.4 8.4
127.2 10.8
125.5 9.2
132.6 7.8
128.6 8.8
127.5 8.5
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BLNION LNGINCEWNO. INC.