HomeMy WebLinkAboutCT 81-50; O'GARA; PRELIMINARY SOILS INVESTIGATION; 1985-09-23.1' J,.~.. . .
,'. COM.PACTION L.S·, INC.·
, SOII;. ... TESTING & INSPECTION SERVICES' ••
PRELIMINARY SOrLS iNVESTIGATION
'f,qr
Proposed Single J='amily DwelLings
Ca'r lsbad Tract· No. 81-50/ PUD-37
. . Valley Street . .
Car lsbad, Cali fornia
Prepared .for
MIKE 'O'GARA,
3229' Valley st're.et
" Carlsbad, CA. 92116.
September 23, 1985
Project No. CL-1405
"
7895 Convoy Court,' Suite 15, San Diego, CA 92111 • (619) 292·0688 • North County (a19) 141~5289
..
~ .... ,.;--, .
-COMPACTION LA., INC.
j SOIL TESTING· & INSPECTIO.~ SERVICES
Mike 0' Gara .
3229 Valley: Stre'et
Car lsbad, CA.. 92008
•
,Septembei 23, 1985
Project 'No.. CL-1405
Subject: Proposed Single Family Dwellings '
Carlsbad Traqt No. 81-SU/PUC-31
Valley Street
.Car lsbad, ,Cali for,!,ia
, Gentleme.n:
, .
Per your request; w~ have p~rrormed a preliminary soils lriYe~ti-
. gationfor the subject project.
The purpose of our in'vestig-atio'n wa"s 'to evaluate the' suitabilj.ty
of the si te "9r the proposed developrn$nt and, ma'ke recomme"nd'ations
with regard ta' ~ite gradi~g ~nd foundation design~ '. -'
. Bri ef ly, the in vestigatJon' r.e veals fa vorabie soil' condi ticns and " .
in 0 U r 0 pin i o:n the sit e i s sui t .a b 1 ef 0 r t h ~ prop 0 se d de 'Ie 10 pme n:t ,
provided r.ecoinmendat'ions set for~h in the" attached report are' "
. adhecrred to. . .
If yau have ani question, please do not hesitate to'cotitact uS.
. -
This ~pportu~ity to be of servj.ce is sincerely appreciated •.
R.espectfully suomi tted,
'COMPACTION LABS, INC.
cM/41
Dale R. Regii, RCE 19393 .
DRR/pjr
. cC.: (3) su6rrii tted
7895 Convoy Court, Suite 15, S~n Diego, CA 9~111 • (619) 292-0688 -. North County ,(619),' 741-5289 .
.~ ,t ...
C'OMPACTI:ON LAItl, IN·C.·
'f SOIL TESTING & INSPECTIQN SERVIOES·
TABLE OF CONTENTS
1 •. Purpose a:nd Scope
. Pag.e
.1'
~. Location and DescriptLon of Slte
J •. field Invest,iga-tLoh
44' sail Conditions
-
5. ·Laboratory Testjng
6 •. Recommendations and ConclusionS'
A. Gra·ding
. B. . Foundat·i.o'ns
C. Recommend,edPaving Section
D. RevJew of Gradin~ Pla'n
7.· UncertaintY'a Limitations
APPENDIX
J.
1
2.
2
2.
Appendix "A" Exploration L.eg~nd .and Uni fied'Soil
Classification Chart
Plate No. 1
P.lateNo:. 2 7
Plate No •. 8.
Test.·Pit Location Plio
ExpLoration 40g
Tabulation· .of Test Results.
Appendix ,"B"·"'· Recomm~J1ide.d Gra.ding Speci fications
. ~-.
S'Q ~"'!-
COMPACT.ION LA_,.INC.·
Ii' SOIL TESTING & INSPECTION SERVICES . Page 1
1. PURPOSE" ~SCOPE
The purpose ot the .investigation was to ,determine 1'f the site' is
sultabre for the proposed single family dwelling-s.
The scope of the investigation was. to:
. A. Determine the' physical prop'erties and eng'ineerihg
characteristics of the surface'and subsurface·
soils.
B. Provjde desi~n information with regard to grading,
5i te preparati'on,. and f'oundation design 'of the pro-
posed stf'uctures •.
, 2. LOCATrON ·AND . DESCRIPTION OF stT.~·
The site i~ lota~ed at 3229 Valley street, Carlsba~, California.
The 2 acre., "L" shapped property, borders vacant· lots ·to the
north~nd 'west, existing single family t;iwellings to the south and
Valley 5,ti'e~~ and addi tiona~' family dwellif}gs ,to, the ea-st.
" The topography' of the' lOt' sJ.,opes gentlf downhill f'roriJ east· to
west wi th an'o ~erall difference in elevation' o,f apprdximat'ely ten feet. ' ..'
Th~ site is pre~ently occOpi~dwith a single-story res1'dencer,~nd
.. det.ached garage. An existi-ng le'acryfield is loqatedwest of. the.
·house and will require. removal at the time of grading. The
residence is landscaped with hedges, sm~ll tb large tree$r'nativ~
gra$Ses a.nd is encomp.assed by fences. . Veg·etation on the .
remaining portions o·f the property consist of a few,'sma·ll trees'
and nati ve gtasses.· Howe ver, these grasses' ha ve been recent,ly
disked under to avoid fire· hatar,d~. On the southeast corner 'of
the site (area o·f pro'posed' lots :1' ahd 4) stockpiled fill soils
were observed. The$e soils may be blended with on-site native
soils and utilized d4r.ing 'earthwork construdtio'n.
It is our understa',nding, that lot nl,Jmber 1 through 7 wilL be
occupi~d wi th newly cons-triJctedsingle' family dwe,llings. and lot,
number 8 is 'to, recei ve an existing single family dwelli,ng. which
is to be moved on-si t'e l.!pon completion of grading. .
J. FIELD INVESTIGATION
. The field inves'tigation was performed on September 10~ 1985·; and
. incl.uded an inspection of the sit,e and the: excav'ation .Of six'
exploratory trenches:, wi th aback' hoe to depths of ten feet.
Location of t~st ~its are shown on attaChed Pla~e No. 'I, ,entitled
"Test Pit Location Plan~"
As exc'a vation proCeeded representa·tive bulk samples, wer's
~ollected. In place h~tural deniitie~ and moisture dontent were
')
:COMPACTION LA., INC~'
. >! . SOIL 'f,ESTING & 'IN$PECTION SERv.'eES • Page 2
,dete'rmined at di fferen'/;' depths' in the exc'a vations and are·
inc1,:uded Ln Piate No.' s 2 -7.
4. 'sOIL COND.iTIONS
Loose surficial soils Isilty~sand~) tonsistihg of plowed grdund
were' found to average two feet in depth throug,hout the si te',.
Underljing soilS t6 depths of ten feet wete densa silty~sands and
.stLff sandy clays and clays. .
,Expansi, va soils (sandy claY$ and clays) were observed' in test ·pit·
number' 2 and 6 (proposed Lots 1 and 7) and will require, special
recomendations and construction details if ,seleCtive grading Is
.not employed~ Soils encountered in tes·t pit numbers 1, 3',. 4, and'
5, consisted of silty~sands a~d wers found to bs non-expansi~e
(less .than 3 percent swell).'
Groundwater. was not encounter·ed, nor did ca ving occur in Cjny of
o,u;!' explor'atory trenches •
. 5. LABORATORY sote TESTING
.. All ,laboratory tests were "performed on typical so,ils in
accordance.with'a.ccepted·test methods of the Amer~,ca'n Soci',ety'for
Testing and Mate,rials (AS.TM) •.
Tests condu-ct e,d include:
(1 r
(2)
( 3')
(4 )
(5 ).
'Maximum Density &.Optimu~ Moisture
Direct. Shear (Re~old)
Sie ve Analysis
Field Density & Moisturj
Expansion Potential' (condq·cted in
teqtiirements bf the City of San
Expansi ve Soil.s.)
. '
accordance ,wi·th
Diego T~st· for
Te.5t results ate tabulated on the attacbed Plate .No·~ 's 2 through
8 entitled "Exploration Log & Tabuiation of Test Results."
6·. RECOMMENDATIONS & CONCLUSIONS
General
The s'i te is sui table (or th,e pr'iJposed si.ngle familyd.wellings .• ,.
Recommendations contained in this report should be Ln.corporated
in the planning, design and c,onstruction pnase o.f t.he-subject
project.
6A. Gra..dlng
Subseque'ntto si ta demol! tion and removal of the 'existing
structures" loo$e surfic,ial top soils, ~s indicated on attached'
COMPACTION, LA_,INC.'
.I. SOiL, TESTING & INSPEC'tJQ'N' SERVICES 'Page'3
Plate Numbers 2 through 7, 'should be removed' ~ndrecomp'a.cted in
accordance wi th att,ached Appendix '8" enti tIed' "Recommended
, Grading Speci fications. "Loose, na'ti ve soil,s may,b?, d?termi.ned 'a~
,those ha ving an insi tu ,dEllJsi ty of ';less than 85 pe.tcent of maxi"!um
: densi'ty. , '
Lea'ch lines located west of the existing house $hould be removed
and' tlieir excs vations recompactEld' 'in' accordanc? with at ached
Appendix'S' • ' .
if ericovntered, leach' lines-a:nd/or pipes should be' removed,.
Concrete pipas ~~y b& crushed in~place. Trench 11ne~ should he
recompacted in accordance with Appendix 'B'.
6B. Foundations
.General,
If on-site expansive soll~ (such as those encountered in test
No ~ 's 2 and 6) exist wi thin 24 inches 'of fi,nish grade upon .
completion o,fgrading, ,the' ,following foundation recommentdatj.on~
will be require~ to ~~duce '~tructural damage occurl~Q from
excessi ve, ~ubgrade mo vement • . ''', . '
For one and two story constru6tion:
Continuou~' footLngs ,ha vin~ a minimum wid,t'h of 12 inches and
founded a minimum of 18 inches. below'-lo'west adjacent grade will
ha've an a'llowab:le soj;ls bearing pressure' of 1200. pounds per',
',squar:e foot.
All continuous footings a,re to be founded a ininimu~ 'o~f ,18 inches
1::?elowlowest adjacent grade and'reinforced with one No.4 -bar. top
and bottom. steel s.hould be posJtj.oned,J il)ch'es ,above 'bottom of
footing and one, 1..r:i6h below top of foot,ing..· '
in.terior slabs S'h'ould be 4 inches. thick, reinfo:iced with 10/10, 6
x 6 welder;! wire mesh, and. l,lnderlain. with a 4. inch base consisti-ng
of sand or crushed rock~ Sand should be tested in' :accor'dance ...
with ASTf.f. D-2419 to .insure a minim(;!m sand equi valent of 30~, Slab
reinforc.J.ng should be'. extended' through joints and pro'vidi3a' .
ten'sion tie wi th perimeter rootings. If' this methodpro'ves .
impractical dviing construe·tion, an al terna.ti ve met-hod, may be
,employed .Thi~ metho.d' consists of No'. 3 bars, 3D, inches on
,center, . ext~nding 30' bar diameters into bot:h slab and
'foundatjon.
Clayey, soils' Sh.DU).d not be allowed to d,ryprior' to placing
'concrete. They should b~ watered tiJ insure they ar? kept in •
,very moist· condition or at a, moisture content exceeding optimum
moisture cont~nt,by a minimum of j p~rcent.
"';"'I "' .. -CO-M-PACTION LA.-,INC.-
Page 4 SOIL-TESTING & INSPECTION SERVICES
~8(2) Found~ti~ns (Alternativ~)'
6.c. Recommended"·fa-v1ng" ~ec-tion
structural" sectLons '-01' asphaltic pa-vi-ng for t-he pioposed roads
and streets are based_ on an estimateif subgrade 'Rl value of ZO.-
The _ following section is: pr,ovided for bLd, purposes only. Actual.
sections should be determined $ubsequent to completion of g-r~ding
.. operations. . "
Proposed st. Jam~s-_C~.'
Assumed Traffic Index -4.5
2 ihches af-asphaltic paving o~
8 inches of select base course ·on
6 inches .of recompac1;ed natLve subgraqe~.
, -"Proposed st. James Dri ve
_Assumed Traffi6"Index = 5.5-
J inch~s ofasphalti~ p~~inQ.on
10 inche$ of select base course on
-6 Lnche-s-of -r~co_mpacted n~tive-stlhgrad.e.
All materials and construction for asphaltic paving andba.se
_should con-form to the Standard SpecifLcations of the -state of
COMPACTIONLA_, INC.
. SOIL TI;STING & INSPECTI.ON· SERVICes • . )
Califo'rnia Business 'and Transp'ortation Agency, Department of
Transportatio,n, Section. 39 and 26, respect.i vely. Clas-$' '·111
d.ecbmposed granite, if used, should have a minimum 'R'. value of
70 arid SE of 30. All materia.ls should be compacted to a'minimam
of 95%.
~D. Revi~w of GradiAg Plan
Preliminary grading plans used during_ our investigati.on ~ere
.prep'ared by Joseph Lukow.ski. If appro ved plans di ffe,r from
preliminqry plans we ·would like .to review them' to assure
compliance wi th recommendation$ presented; in this '"report.
7. UNCERTAINTY AND, [..IMITATIONS
Surface and subsurface soils ate assumed to be uniform ...
Therefor'e, should $oi,J.s encounte'red during construction differ,
from those presented i~ this report, w~ should ba coritact~d to '
provide their'engineering properties.
It i~ the responsibility of the owne~ and cQ~trqctor to caTTj out
recommend-a.tiC?,ns set forth in this report ~
. During our investiga'tion of the sub.ject sLte, evidence Q:f _
faulting was not-encountered. Subs,eqaent. to review' of available
, geologic literature, we feel any, faulting in the vicinity ,of t'he'
, sit.e may be, c~as'Sified as. inactlve. However, it should' be =-hoted
that San Diego County'is located. 1.n a, high sidsmic area with '
, , regard, to earthquake.--Earthquake ,proof projec:ts are economi ca'lly
,unfeasible. Thepefore;:damagv as a result of earthquakels
probable, and we ass.ume. no lia,bili t,y.
We'assume the onsite safety' of our personnel only.' We cannot
assume liability of personnel ather than our own. It .is the'
responsiblii ty of the owner and co.ntraptor to insure. .construction.
oper'ations are conducted in asare· manor and in confo'tmanc~ wi th
regulations governedpy CAL-OSHA and/or local agenc1.as. .'
If you have a~y questions, ple~se do not hesitate to contact as~
This opportunity ~o b,e o.f service is sincerely appreciated.'
Respectfully submitted,
COMP'ACTION LABS, INC •
. cdd/4/:.
Dale R. Regli, RCE,19393"
RKAlpjr
cc: (J) submi tted
COMPACTION 'LABS,
SOil TESTING
'f'J
. RPI2t)X. SCAL.E. -/":::55'
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LOT 2.
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LOT If
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( LOT 7 LOT'~
.TEST PIT'LOCATIO~ SKETCH
.PROJEC.TNo. CL-140S
PLATE~ NO.1"
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.• OMPACTION LABS
SOil T~SJINC & INSPECTION sERVlq·s
UNI'IED SOIL CLASSIFICATlqN ~T
, , SOIL DESCRIPTION GROUP SYMBOL
1. COARSE GRAINED, Mo~e tha~ half ~f m~terial is' larger
than No, 200 sieve size •
. GRAVELS CLEAN GRAWI,S OW
More than halt of
coars. tr!,c.tion is
larqer than No., 4· GP.
sieve size',but
smaller than 3". GRAVELS WITH. FINES GM
(Appreciable amount
·of, fines) GC
~ CLEAN SANDS
More than halt of
coarse fraction is .
smaller than No. 4
sieve size. . SANDS WITH FINES
(Appreciable amount of. fines)
11. FINE GRAINED, More than
half of material i. smaller'
than, No'. 200. sieve size.
SILTS AND CLA,YS
Liquid Limit:. '.less, than 'SO,
Liquid Limit
greater than SO
H~GHLY OR~IC.SOlts
sw
SP
SM
SC~
CH
OH
TYPICAL NA.'tSS'
Well graded ~rave ls, qrave.t-,
sand mixtures,. little ,or no fines. '
Poorly qraded qravels, qravel
sand mixtures. little or no fines. '
Siley 9rav~h,poorly graded,
gravel-s~nd-silt mixtures.
Clayey gravels,. poorly
qraded qravel-sand. clay
mixtures. '
Well' graded ;iand. grav~·lly
sands. little o~ no tin~s. Poo:Hy qrad"d sands"gravelly sands, little or no fines.
Silty sands. P09rly graded
,'sand and silt mixtures.
Clayey ~and~, poorly qraded
san~ and clay mixtur.s~
Inorganic silts 'and very
fine sands, rOCK flour. sandy
silt or clayey-silt-sand' ·mixtures with ~liqht, p'last-
icity ,
'InorganiC clays of low :to .
medium plasticity, gravelly
clays, ~andy clays, silty clays, lean clays,.
organic silts and organic
silty clays' of low plasticity
Inorganic silts, micaceous
or'diatomaceous fine sandy or silty soU.; elastic: silts.
Inor.ganic clay. of high
,plasticity. fat:, clays'.
organic clays of medi~
to high plasticity.
Peat and other highly
organic:. soils.
~ 0-, 14ater'level at time of ex.:avat~on or as indic~ted
US Und~sturbe~, dri'v~n ,ring sample or tu~e"sample
CK' '.,. Undi sturbed chunk sampl e
BG ~ Bulk sample
APPENDIX I A'
.• COMPACTION LABS • I . 'I
. SOIL TEST.INC·& INSPECTIQN SERVICES .
exPLORATION. (O'G'
.
PRO J E C T N A M E __ 3 ... 2_2 _9, _V_a_l_t_ey_." _8_t"""r_e_t;! t __ D AT E L 0 GG e 0 _8 e_p_t_e_ID_h_e ... r ~1_c>_,~1~9_8_5_
-Exsisting Grad:e ' T'EST PIT NO. ELEVATI0~
ONE , , -....... '~
C
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-
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Two
PROJECTN O~ __ C_L--l_4-0,s--_---_-,PLATE NO.
.COMPACTION LAB'S'.
,SOil TESTIN<:;,& INSPECTION SERVICES
,..~
'~r~ exPLORATION LOG
P:RO:JECT NAME 3,22'9 Valley Street ,DATE, LOG,GED Septembe,r l:Q,,, 198~
" -
" ELEVATIO~ Exsisting Grade TEST PIT NO. TWO '---
c
0 -0 .s:: ....
+-I QJ :>, -0 +J +J
QJ Co +J lo4t N 0., ~ DES C RIP T 1,0' N' REMAR,f(S QJ >, " _& .... -,.-QJ U
I+-..... lit ,QJ lo4t C::l-.... ' , , -S-+J i::n-~' I+-
-:...-, '
QJ c,-
QJI+-:::s c' c QJ QJ ....
.s:: .... Q u +-I QJ .,.. QJ .... QJ. lit , +-I Co Q. en +J. lit > Coif.. .... en ..,
Co e >,,-.... c:: en QJ e-.... ~,
QJ -~ s-o 0 ~, ..... ~ 0 .... ,
Q en Q ~'u Q;. en en en'u
, '
Grey-B,rown ,-Humid, L6os'e " 8!L1'1'-
1 SM' SAND (Plowed 'Ground} ,., "
BG, 93.5 4..0 1.5 ,'SM Brown, Dry,' Loose, ,~ILTY=-SAND
2, (Plowed Ground) "
,,'
"
BG 52.4. Orang·e-B'rown, Huml,d, 'Stiff
3
, -r--SANDY -CLAY'
(Firm Native 'at 2" ) !
4. CK 119.1 6.0 4 C1 (
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-
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C1'-14.05 .' .. Three PROJECT. NO. p'LATe· NO.
.J'
•. COMPACTION LABS.e
SOil TESTING' & INSPECTION SERYICES
. .' EXPLORATION LO'G
PROJE CT N A ME ..... _3_2_2._9 _V ... ' a_1_1_e Y_'· _S_t_.r_E;!_e t __ '"'"" DATE LOGGED
TEST PIT NO.
$.epte.mber 10~19·85·
ELEVATIO~ ExsistingGrade THREE
-~ cu >t -cu Q, ~. ~ cu >t ''--If-.... .In ·cu -. e-r.-+' cu CUIf-::::I e .c ,...' cu ~ CU' '+, Q, c. s Q, In+' >,-''-e cu '" r.-oo c Vl c ::EU
BG
:l,
BG 119.5' ·3;5
2
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5 CK 118.'8 5.0
6
7. BG
A.
CL-1405
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VlU'
DE$CRIPT'ION &. REM·ARKS
32.6 '0-1 SM Grey-,Brown, Dry, Loose,
STLTY -S.AND ...
(P1owE;!d Grol,lnd)
·1.5
I-SM B:t'own" Dry,. Dense,
, SILTY~SAND
(Fir. Native ai 1.5 1 )
SM brang~,:Humid, De'n~e
~'; SlLTY':"'SAND
5 '~
~
23 .• 4 7
SM Tan-Red, 'Dry, DE;!nse,
SILTY .... SAND .
Bot tom Of T·est. Pi t NUIilQer. Thre·e.
i-.
Four
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j,
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PR:OJECT NO'. __ ~ ___ ~ ......... PLAT'E NO.
--------------------
,
e C'O,MPACTION· LABS.
SOIL TESTING & INSPECTION SERVICES
ExPLO.RATIONLO·G
PA 0 JE CT NA M~' ..... _3...,.2_2_9_Va_1_1_e~y_S_t_r_e_et_. _'_~ DATE LO.GGED .. Sept~mber 10,1985
" E'LeVATIO~ Exsisting Grade' fE'ST ,PIT NO. FOUl~
-
c:
0 -0 .c. ",..
+oa QJ >, -0 +oa +oa
QJ c. +oa ~ N Q. tIS· DESc;RIP110tf R~MA·Ri<S QJ >, .. -" QJ U &.
Jo:-",.. -l+-V! QJ ~.' c-",... -1:-s-+oa cn-+oa I+-
QJ ci.lI+-::s c c QJQJ . .,.. .-
.c. -<V aJ -' QJ. V! Q U +oa ",...
+oa c. c. V!~ V! > c. .... -V!
c. e >,-",..' c· VI QJ e-.,.. IG
QJ /0' O'
th .s-0 0 tIS· ... tIS. 0...-
Q Q xu a. v.;. v; VH,J ~
-"
SM G:;rey-Brown,. p·ry, Loose, t
SILTY-SAND (Plowed Ground) ,
!
'"
1 -. :..
SM Brow'fi, Dry, L.oose,
SILTY-SAND, (Plowed Ground)
2 BG 118.6 2.7 35.8 2
,SM Brow.n~ , pry, D'en'Se, SILTY-SAND. l
(Fi,rm N'ati ve at 2' ) ..
3 BG 3-9.1 3 " ..
SM Orange, D,ry, Den'se, SILTY-SAND -
"
4 to-
..
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S i-"-
6 -,
. ,
." I-~
8 BG 8.
SM Tan-Red, Mo:i,st, Medium':"Dense
q -SILTY-SAND : . ,
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Bo~tom, of Test ,Pt 1: 'Num·ber Four .... -
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" ..
PR,OJEC,T' NO,. CL-1405 PLATE NO. FIVE'
..
. .
-COMPACTION LABS-.
SOIL TESTING Be INSPECTION SERVICES
, ExPLORATION LO'G , . ' .
PROJE'CT NAME:, 3229 Valley Street :0 ATE LOGG ED __ S_e p_t_-e_m_b_e_r_I_O_, , __ 1_-9_8~,5 '
ELEVATION . Ex.sisting Grade
-+" QJ
QJ 0.
QJ . ~ I+-_.
,QJ .c, ..-
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0. S
QJ. I'CS
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1
3
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'BILTY-SAND (Firm Native at l~S'\
-SM . Oran'ge "Moist ,Dense ~
SIL'T¥-SAND
Bottom Of'T~st Pit Number Fivs
PR OJE'C T ,N 0'. ____ CL_-"""'I,_40_S_, _----...... """-'""' Six PLATE.NO.~ ___ p __ ~ ____ ~
, j"
e COMPACTION LABS.
-SOIL rESTING & INSPECTiON ~ERVICES .
,PR OJ'E CT NA ME __ . 3_2_2_9_Va_1_1_e_y_, _S t_r_e_e .... t __ DATE" LOGGE;,D
TEST PIT NO -. -
Rxsisting Gta,de ELEVATION
SIX .. _' . ,.: '
c:
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I, '" COMPA'CT10,N LAEA IN'C.
"SOIL TESTING It INSPECTIONTeRVtC-SS,
TAaULATION 01' TtST RESULTS
OPTU~UM MOISTURE, MAXIMUM: D~NSITY
Soil De~criptiori'
Brown Silty-Sand
Type-
Pl-l'
Grey-Brown Ffne,Silty-Sand P2-l'
'Orange-Brown Sandy-Clay' P'Z-,2 .5"
Brown Sandy-Clay· ' .P6-2'·
,Maximu'rri Optimum
Dry Density Moisture
(lb/tti. ft~) (% d~y wt~)
132.0 .9.0
119.7 13.3
'12-2.2
114.0
13.2'
17 .• S
EXPANSION TEST DATA
Sample No •.
Conditton . Ini~ial, Moist:ure .(io)
Air Dry ,Moisture (io)
Final Moi sture. :(io)
F.inal.Dry Densit~ (pcf)
Load (psf)
Swe 11 (%)
Sample No~
, .
"Pi-2.'S'
" " Remolded
13 • .2
8.,6
21.7
109.7
lSO.O
,5.'6
DlR~C.T SH EAR
~ t' PI-I'
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Remolded , 11. T
, . 11.7 ,
28.0
102.5
. 150.0
9.0
P2-2.5'
Condition R~molded Rem6lded
An 9 1 e 0 f . in tern a 1 Fri c t ton orr __ ---,. __ '_3_1_, ____ ~----2.,...S~
Cohes ion I nte-rcept . (pcf )300 ~ 10Q '
'P'ROJ ECT, NO.
PL..ATE NO.
CL-140S'
'e
tr-" ~.
,COMPACTION LAB~INC. • SOIL TESTING • INSPECTION SERVICES
RECOMMENDED GRAOIN·G SP'ECIFIC.AT(ONS
(Gen~ralProvisio~s)
1. INTENT
The ; n ten t of the s e s p e c i f i c at ion sis to. pro v. i de ge n era 1
procedur~s ~rt accordance with curretn standard p~actice~
. regarding clearing, compacting,natural grounod, .prep.aring area'$ t.o
rece; ve fill, a;n d' p 1 ac in g' a·n d c·om.P act i n9 of fi 11 so il to the.
l,ines,'grades.and slqpes de1ineated.on the availabJe plan·s.
·Recommend,at·i'ons s·et fO,rth in the. attached pre'l imirrary soil s
in·vestiga.tion report and/or s,p'ectal provisions'are a part of the.
"Recom~ended Grading, Specif1catio~s" and.s~all s~per~ede the
. provisions cO'nt~ined hereinafter tn the c:ase of,conflict,.
2. INSPfCTION & TESTING
A qual i f i e·d s 0 1.1 ~ h gi nee r . s hall be-em p loy e d to i. rt s p e:e ta nd test
the earthworle in ,accordance-with these speci,fications and the-
, 'ac,ce·pte.d plans. It will be n.ecessary that the'soils en.gineer or
. ',his rep res en tat iveb e allowed. to. provide· a ~e quat e 1 n:s pee t ion. so
that he ~ay certify that the worle was or was not actomplished 'as
s p e c i fie d 0 r. i rt d i cat e d • Its hall bet h.e r e sp O'n s. ; b il~ i t y 0 f th e .
con tr act 0 r to. ass i s t the. 's 0 il eng i n ee r . a n·d tole e e P. him a p p r a i sed
. "of work schedules, changes~ new infOrmatio'n and dates, and new,
unforeseen soils ·condit'i·ons.'so that he may ma·lee the'se. .
certifications'. '. If subs:tandard conditions (que·stionab1·e soil; poor moisture
.control" in.adequate co.mpaction, adve,rse weathe.r, etc.)' are , ,
encountered, the son engineer will be empo.w.ered toeith'e:r ~~o,p'
'const.ruction until th.e c,o'nditions ,are' ,remedied or re'commend
r e j ec t ion 0 f the w·o r k •
So i 1 . t est sus ~e d to de t et:' min e the d'e g.y. e e of coin p a,c t i 0 nw i1 1 'be
performed in accordance with.th·e following A~ericanSoc.ietyfor
Tes ti n 9 an.dMater i a 1 s test 'methods:
* Maximum.Density"&Optjmum Mo'isture ContEmt-·
ASTK D-1557-70T.· . ' * Density tif Soil Irt-Pl~ce, -AST~ D-1S56 or AST~ 0-2922 . a'nd 3017 ' .
APPENDIX 'B'
~ ~OMPACTION LAB! INC.
SOIL, TESTING' • INSPECTION '.SERVICES
'3. MATERIALS
Those so iTs used as fill' wil l' h,a v e" a, min i m limo f 40 per c e.n t
~assing a #4 si~ve. They will be free 0' veg~table ·matter ·o~
'othe.r deleterio·us substances and 'contain no rock o'ver,six inches
in size. Should' unsuitable material. be encountere·d, the,s'oil
engineer will be conta,cted to provid~ re,commendations.
4. PLACING ANO SPREADIN6 OF FllL
The selected fill material shall be placed in layers whichwhe'n co~pacted wiJl ~~t exceed 6 inches in thick~ess.
E a c h 1 aye r s h a 11-. 0 e s pre ad e'v en 1 y an d s hall b ~ t h Q r 0 ugh 1 y b 1 ad e .
m i x·e d d ur i n g the s pre a.d ; ng to' ins u r e u r1.i. for mit y, 0 f mat er i ali n
each' layer.
When the moisture content df the fill matarial is b~low th~t
recommended ~y tha ~oil engineer, water shall then ba add~d untfl
the moisture content is' as specifi,ed'to assure thorough: bon;din.g
dliri.ng the compacting process.
Whe'n the moisture content of the fi] 1 mate,ri al is above that
rec.ommend.ed by the. SO'i'l engineer,·the fill material shall be·
aerated by blading 'or 'other 'satisfactory methods u,ntil the .
moisture 'content i$ as 'specified •
. :5. COMPACTION
·A 1. t er e a eh ' 1 aye r ·h as· bee n p 1 ace d , iii i xed, and s pre a d eve n 1 y ~ i t.
shall be thoroughly compacted to not' less than 90.% rel a.tive
comp~ctio~. Ccimpacti.on shall be by lhee~sfoot rOllers,.
mu1t.iple-whee1 pne~m'atic tired ro1.1ers or other types of
rollers.' '
Roll i n 9 s h a'l 1 be a c com p 1 ish e dw h i1 e t.h e fill mat e ria 1 i S at the
specifie,d moisture content. Rolling of' each. layer sh,a1lbe
contin.Liou,s over ,its entire area an'd tne· roller shall make
sufficient trips to insure that the desired d~nsity has been
o'b t a i n e'd • "
The fill oper at ion sh a II b'e conti n ued ins i x i neh comp'acted
liyers, or as specified abQve, until the. fill has bean brDught to'
,the 'ini$hed $lop~sand grade5 shown o~ the available plans.
APPENDIX ',B'
" ~.
:1-' 'i', .
. COMPACTION LAS.INC.' • I SOI~ TESTING, .INSPECTION SERVICES:
,. 6. WALL .SACKF I Lt'
Bac.k.fi1lsoil slloul.d consist of· nO'l'1;.expan'siv& :sand.: Campa.etlan., .-,".> .: ,
should be achieved w'ith light hand.-.held p.enumat.ic tampers. to
avoi.d over co·mp.acti on and hence 'Cause structural dam·age.~ Wall
backfi 11 shoul d be compact.ed to a mi·nimum· of 90 perc.erit.of'
maximum density. . .
. 7. TREN.CH BACKFILL
All t·ren-cn backfill locate.Q within structu.ral areas. should be .
. :compacted' to ·a 'minimu'm of ninety pe·rcent of ma,ximum density •.
APPENDIX 1 B I·
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