HomeMy WebLinkAbout; El Camino Mesa; Soils Report; 1964-04-20SOfLs INVESTIDAT1IDN FOR THE PROPCBED
EL CAAAINO MP;SA SUBDNISXOON
CARLSBAD. CALDFORNXA
KAMAR CONSTRUCTKIN COMPANY
529 Elm Street
carbad C8liforaia
Aprtl to, iper
Denal F. Dr~s~~tIaus
corw?sltfiy lbgiaeer
DRESSELHAUS BXGINEERS
Civfl end ConmMag Engbers
928 500th Hill street
oce8nside, calif0mia
t-2114
TABLE OF CONTENTS
Letter of Tmmxnittal
s-w
Chmral Side aad SW Coaditioru
FLstd Lare8tigation
Laboretary Taste
GowIumion~
Rwomanendationa
APPEMXX
Ylptc
site Pfra
Loga Of Test Borfngrr 2-8
st&bmty of Sour 9
Mobture ikn*ity Curve8 10
Tomt for PoteEtW Expsnrion 11
Specifications for the Construction of Contrilled Fills
DRESSELHAUS ENGINEERS
CONSULTlNG C/V/L ENGINEERS
528 SOUTH HlLL STREET + OCEANSIDE, cxL,.=ORNlA + PHONE 72cs21*6
nacaabcr I.?, 1964
thWi8T &lkUt’U~tiQU COn‘QaQy
329 Elm stm4t
cbrlsba& Calmmda
a*: Job Ph. L-2li4
El tzamauQ &44m
Culrbed CalLf.
The folksuiskg mpcmt ~evom our lrupmtlen of the ground 8urkua
ccmd,&kww mui fnvrrtlg&icra of tlu wnderly&g 8ollr eeadkiaa at
tlm rite of the propmad El C&&W Mea 5xaWvMca, in t&e City
of Crriabe& califomi&
caw iawertig~tioa irI&CU4~ that the pmporcld reridutm. weed
ftamo ~txuetur8*. cm br daty sap$Kw-&*d en squur CTr CarrtlatMPr
foetlnp~ placed a II inirwm cf twelve inches into natural uadisturbed
aofls, or la crmMet@d filks, if the reeommfmWiosr h tkr foliewhg
repot are foitewod Ikstgn hearing values crf 1500 popado per
square fwt mry b4 ared. Sulrfaatory fill mrtari4k em he obtaia4d
mm the w-site rxca#tioQ~.
The rsport iucluder tha nr~tie of tbm 81bu~fme rxplorbtbaa ubd
Iaberatcry t*otQ l wall 8s tbo rrWxti?&g tupgortiag the cakalu*Qaa
aud tetmr maadatiaaa coe&alaed therob.
ItmJputfally l uhmltted,
DRESSELMAUS ENonw.EEl:S
_.’ /;g<&t , I
,“o Ld “ ,’
lE. Brlu Fmitk RCE I,, $17
SCOPE
Tbi8 ismeatigation WM x1-&8 to drtarmine the following:
1 / Tb4 extent of eYi&ag fill material. vetgetation aad &brim.
2. The mbrurfcce 8oil8 condttiosu.
3. The extent aud nature of up8m1iw 8&s. if any.
4. The allowable beartgs cap8city of tlm n&urJ found&ion
eoib and proba?ale fill material
A series of test borings were mule at tha rft8 to determim4 the d4ptb
of doting fill rolls and the natural soils coadtliona. The roile
encountered weme examined coatinuourly doting the drtlliag oparaticms.
Bamplae of tbe mile ware recovered from the boriag8 at frequut
iutsrval8. Laboratory tests wua performed on tha sunplea to deter-
miae the php8ical ehamcteristics of the 4dlr. The charac~eristico of
the eoUe found in the laboratory tests w4re nib4equmtAy utilised in
conjunction with the mmulte of oboervatioar, on the site in determiaiug
tha suitability of the locsl coils for the proposed construction and in
rtbachiug 0th~ conclu8ions and r4ccunmendaticns roporte&
GENERAL SITE AM, SO& CBNDITIONG
The site inveaig4t4d covers appro&Mely St+ acre8 located 14fscW
to urrd easterly of El CMino Real on th8 Cul8brd Airport 8ite, in the
City of Carlrbad, CaW~ruir. (S4u P14te 1)
Th4 8it8 ir loc4ted 4n a ~1484 which lmr been gra&d in th8 pl8t to
provide airplan raawayr, aad maintuauce and baRdlug arttao. ‘Sweral
utural draiuage raviws ar4 located aramd the periphery of tha mite.
Aephrlt paving and structures ware found oa the rite at location8 indiceted
on Plate 1.
Eadetiag fill matehI and debrir were fapnd in a ravim at the sosttlwrly
end of the property. Old lumhu. auto bodies aad debris were found
aro~ad eaieting structums cm the aorth444t4dy portion of the s&e. The
1ocJiaa of all exkting fill and dsbri8 is *how-a on Plate 1.
Eueal* trees sad light vegst8tima w4r4 famd on the no&h4rly portion
of the *tie. Light vegmom covers the raviar areas.
POELD INVESTBOATXON
seven tut borlttgr, locti u ebvwa oa Plats 1. won CQm-
@ted to l maxh-mm depth of 16 foot wlng a 2 diameter
power drill. The drilling wu &ne on Much 26. 27. mad
28, 1964, under the oupervidom of a soilr mgineu.
Continwum loge of the l oilr mcountared in the boring4
were recorded while. drilling aad are &own in detail on
Plater 2 to 8, iaclurivs. Recovered rample# were l e&d
in the field to prevatat moisture lou sod scat to axr
laboratory for tetiog. Sample locationa and record blow
cowta (penetration re@intaace) required to advance the
sampler are ahown on th4 Log of Boriugr, PXUes 2 to 6,
inclusive. The information obtatned from the borings corn-
Wed ratirfactorily with the redimenta exposed in exietiag
cut slope face@ aloag El Camino Real and in ravine&
8. Borrew kwe8tigatQa
Repseuntative umplu of the typical borrow m4tari4la wbi&
w4ll be uMd for Waachg the earthwork were obt.ahad fxan
tbaxiui6gcut~*aTkdraviw#. fhv4rJ~D4fth44dl4
from ths401ocrtion4w444 Irtwwd to tba laboratory to dotar-
mine the moieturs-den&y rrlatioao+ aad gr’rdbtg umlymis.
c. 56il# Enc6imte~
A geurally conriueat soil prdtls i# bUi.vad to exist threqh-
out the l tte. Tha booring in&lute th4t tlm prsd6minuat roil
type i8 granulu. No upanmiva r&l wu ound on the &ta.
D. CIround Water.
No grand wUor wu aceuntered ame dsSlUsg or dter
~~l-w.
-2-
LABORATORT TESTS
The variou8 laboratory tutr ccmplrted for tki# bkvWt>itOa are
pre4ealed on appropriate plate8 in the Appendix.
1. sbear Tests Pbtee 2-8
2. st&bality of soilr PI&e9
3. Mdmtuaw-Density Curve8 pktr 10
4. Tmt8 for PotentW %kpumiaa Plats 11
CONCXJiTSSON5
A, Site Clearing.
kmpection of the sita indicatem that coa8idor~~ chuiag of debrio.
wwd rad junk till b4 required. Arphrlt pavimg md 4tn~ture4 M
located oa the rite aad will have to ba remwad.
B. Eating Pill 5oila.
The srtating ffllr are loe4e 4nd will nat 8efely 8upport additioarl
fill and/or reri&ntiJ 4tm4ture8.
C. Nstnral Fcuadrtion Soils.
The resulta of our fbld imw8tigetioa md laboratory tertr in&ate
the naturli foundaticm roil4 will ruppcrt both fill and rmidas%3
dwelling8 withowt detrimeatai rettlemed when prepued ia accord-
ance with the recommend8tionr aed 4p4ciftcation4 contained in thi8
report.
D. Expansive soil&
Atterberg Limir tear md expm4ion test8 (Plate 11) were perfarmed
on 84mple4 of clayey rilica sad The remulta of thew teats indicate
that no appreciable expanrivs movsmeds will occur in thir 4oil
should tha matutal become ramWad after ceaetructim, Clamifica-
tion te8t4 of other roil4 at tlm eite further muggoat that the rample
te4ted hu the highert awell potential which was not detrimental.
E. Bearing tapacity.
The rxmtrolled fill mu3 a.aturJ uadWwb4d 80118 will rmfaly 8apport
footing4 laded ta 1500 petuwla per equare foot when famded at
lout 12 inche8 below the 4dJwent grade.
I?. Eroeion and Slope ProtectioaL
Due to the granular nature of the 80114. the upoud rlqto will require
immediate growth of adequate gramd cover to urea erorien ob the
d@pO fUO8. hdditbd~?OtOCtiVO dWiCO8 8UCh&#tOpkZ'IZI#
and intercepting ditches asa muggested whers applicable to
fort&r mtnkniee erodes huards. especklly in puk w&y
between aidewalk areaa and curbs.
RECOh4MENDATLOEB)
AUvegetation, debris, uph&tpaviag. ext~8tm4ture8andfsamdatiot18
ahell he removed fram the Me. ~bntm~48uetob4r4mwe8. th4
entire root 4y8Wm mU#t b8 excavated aad th8 area recompected through
the astir4 depthofthe 83umv4tioB.
The edmting fill material eheli be remwed. The exbttag fill m8terial
may be re-used if cleaned of Jl vegetation end debris rsd rep&cod
W&r th4 4Upb~~id04 Ofthe Soil4 OngbSer.
The sulrf8ce 8&l8 in all cut andnatur8l grade u4umxwtb8 scarified
to et leaet S&X (6) bd!W# deep, moietaed cad recempacted to ad lerr
thrn9@%OfmurbnUm delL#ity.
The recommend8tiana prwsmtsd iu this report are hoed on the HIflS aad
Caadtt~S notfrd chufoe the SieM earpkaetien aEd lbberatoay tSStb# or
the #oil8 encotiered at the alto. &I the event other 8oilr or conditiona
are encoutiered during the gra&ng of the a&e, they &all be aaelyeed
by the roil4 e~ineer, who mhy then revi the recommaadetiow
pre8mt4diathi8 report.
* .
DKESSELRAUS ENGINEERS
E?i a : .I, Hili Sc;ee:
0 :ear.c:,, c , Cailfomia
Dote: _ ,_ . A!f&&~L~.m-.~- _.. ,. .
LO\? OF BORINGS -_-, ,-
‘.
_-
Dapth
1
2
3
4
5
6
7
8
-
iii j
,1* .i ‘1
“*
.,,
SunPla
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1 t
1
I
1
j
I
i
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I I I
25
30
Plate 2
Jcb No. Z-2114
Sheet Nc. 1 of 7
Reference
BORING NO. 1
I I -__
Brown Sandy Loam
with 112 inch to 6 inch rocks.
Light Gray Sand
Unable to hold sample
Grey Brown
Medium Sand
Unable to hold sample in sampling tuk
I’ i Plate 3
7 DRESSELHAUS ENGINEERS ,25 si;.y,-., *iI! S’;=ee:
OYsw.elr~?-, C&fcTn;a
.: :,P-::a&lll&t .-.-. ~.~ ‘. ~‘yf* ?tf3L!wBl~M -_.. _ .- i i ..‘,,~~JEC~:~.~l C8miao M*#a ___
E ,,.
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t
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24 *. : : x*: .;.-. .\. . 3* ‘. -. *.&L. 2..
/ 4.:
\ I’--: ‘.. ’ .\
4 - -. . . ( -.
* 5 . -- , - .,,:-- ;..I
.*- . x\.
-,._. . ll- ..-. -., , e.-...
12 7
For&i 75 i&wised &IO- 63
LO<; OF SORMGS --.-
i 1 i
I ~, 6.. 0 I
I 19-71 5.3 0.91
: . I
I
I
t
53
58
50
Job No. 2-2114
Sheet No. 2 of 7
Reference
BORING NO. 2
-
Brown Sandy Loam
Brown Fine to Medium
Clean Sand
Unable to hold sample
in sampling tube
.
Plate 4
Cte: .;- _ .,.~~kFL l%M By: _. ,.I -.JPR~RW fLH.- _. sUBJEC’i:.,“,F1CCmno__Me~.~,~ _
lx? >t?,
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.+’ : _)
3, :: y-y .., ,. -7 ._ 4’,,T, . , -:.
; . . .
5. *. y-,.
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9 - ‘. .‘.‘I ;.:,:r;
t. ‘ . - .*-e 10 - ‘._ *.--_. ,, . ,.. . .-
11 - 3. : .i:. ,y: ,...!
‘.. . . ,:*:.-
12. .-.-.. .
13 . . ). . .:,. *; .i ‘, “Z -- * . 1,. . . .::;
:7.. (’
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&cif ‘.-
.
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I I~~.ESSELHAWS ENGINEERS
!Z? , : rI.i: Si:;ee :
- 0 ‘rar.c’ -, Caiiic.r:;ld
1011 I t;’ BORMW
; !
Jnb NC. z-211,
Sheet NC.3of 7 ‘-- _l~..l. Referc?cce -
BORING NO. 3
25
Brown Fine To
Medium Sand
Reddish Brown Fine
To Medium Sand
.
t, y;. ‘- i\.< ‘~. * _” ),
PLATE 5.
T>RESSE;LHAUS ENC;INF:ERS
Civi,l and Consultinp EilgiTleer5~
52s Soll!h Hill Street
Ocea,n*i~!e, California
Date:- March 27, !964
By: FPR/xVIl! LH _____ ~.~ -_____ ..__ - _.. ,~~ ..,~. Subject: El Camincj Mesa __I__ .__. ~._._.... ..,
. .
.
J <: 1, N G . 2 - 2 114, _--~-.-.w :ji:r..r.t ‘!- _^-, of 7
1i.c __ .._,_ ~..
~.. .,~“..---.
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., ’ t . . 7---.~..~~..~ __,.
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1~9.2 -_ ~-~
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--
4. ‘1 8 -_ . .
,,.i.. _,,:.m,
fill
Bottom of !oose fill
Natural Grounil
Red Brown Fine
7~ Medium Sand
-.-. -_-
* A void exists at. catch point
of loose fill and natnml
groand-- Lost Water.
&F, **L- . ,- . ..**
’ ‘_,
1 .&>$ L : 2.
:
Plate 6
:)AE~ELMUS ENGINEERS
525 Sk:..:,::. Hii: S;:-ec:
G.:tar.b::i, CaXf;rnia
LOO OF BORINQS
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J& No. 2-2114
Sheet No.5of 7
Reference i
BORING NO. 5
i
---
Red Brown Sand with 1/Z” to
6” Rocks. Very Rocky
Surface covered with
suculent plants
Plate 7
.v\! i.~,ATjb O&\;.NEF,RS
‘> ,..>. 3 -ci
; C>.~l. -“a
L. t No. 2-2114 _--.-.-.~- .--_
5: .: : N 6 .f 7 .._,, -_. .- .-._ __ Rrie-c ::r‘,
ii]:, tz March 27. 1964
FPRIRVH&H !?s $3 -r(; ; : El Camino Mesa
L_OC OF BORINGS !A t ! R ;‘: +$ ~ -_ je _
.
.
. . : I+ .
&Y, : &!‘j, i $,
,)’ O,>,(.(./:)’ L ‘-,: L I.~ > . ,1$.
Red Urowr; Sand with 1 /2” to
6” Rocky. Vvry Rocky
Surface t.ov~rcad with
suculent ol?nts
I
la ( _ , jl j 5 R‘ :; -, i : .~ i .
Plate 0
DapedAarrh Z&1964
=v ,-.- ~JiTRlRVE. _ Sm3JECT: -El WDQ Mesa
’ c>i.I.HAU> j2.>!;,.NEE;RS
3 : ,‘A r:_;. 5 -ie :
C” “rc’c) C>ili,~,:r.la
‘,t NC. “. z-2113- -_-- Si.ee: N:.& cf .-.~I __
Rc.feprr.vr II-- ---
LOG OF BORrPvCS BOh.fNc;-NO.-,_-
31
4-
s-
6-
7 .
8
9
10
11
12
13
I4 .
: 'jL
j
I
I /
I I , 4”’
I.. ,:~ : ; !; i y
F. ,i Ti, coarse
‘,ilica Sand
5.7 1.23’ 40 I -.--.-
R..: Job No. Z-21 14
El caanfw, Mesa SuMivido3I
Cartsbut Cdforaia
STABtLlTY OF SOXLS
Sample No. 1 Lidat Groy Cm Silica Sad
Sample No. 2 Brown S~FL& Soil
Sample No. 3 Red Brown Fiar fo Medium Sand
LMORATORY CCMPACTION TEST A 8 T )A D-1557-58T
SAM-Pi&l NC. 1 SAMPLE NO. 2 SAMPLE No, 3
% Dwrity % D-&l* % Drnatty
TrW i MoWare Lb. /Cu. Jpt. hloirture Lb. /Cu. Ft. Mobtur* Lb. /ck 3-L
1 4.82 114.77 2.66 116.89 8.00 1ao.96
2 3.23 123.90 5.28 121.96 11.10 120.48
3 la. 74 118.94 7.97 123.64 12.32 118.45
c&norn Dik::y 112.04 124.7 C/k3 10.19 124.4 120.06 #f ft. 3 111.20 114.20 122.3 #/ft. 3
optixntrm Moihwa 9.3% 7.9% 4.0%
MEGMEAL ANALYSPS:
5hhWL.E NC. 1
simm I: 96 Finer than shown
4 100.00
14 99.02
20 94.44
4a 44.44
100 26.14
200 8.82
SAMPLE NO. 2 SAMPLE NO. 3 %FhxtrtbattSbown $FllbSYthn@lMBQtl
100.00 100.00
78.21 9s. 77
60.33 92.15
20.67 39.95
9.50 14.80
3. 36 6.34
n, “?‘A,.. 7*.*.,*_ /
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:.:):.:
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y*: ,~
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,,. ,,
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,,. ~~~
Med. Sand :
122:3 #leil: Ft. .~
: ,9.5% :
,
1
.j.
., .~ ~~..~.
-.~_~- .~, f r5..
~F)~LS~FID: j CRLIfiORNIf? 3
~.IVZES5ELHRUS ENGINEERS DRTEl ; ;
Li.%3,.% HRL ; OCESNSIRE,&iLIF; +-2%+
/ ; PER.CEjXT MOI5TUj-U
PLATE 11
TESTS lFOR POTENTIAL EXPANSDN
SAMPLE NO. 1
Lkht Qlrr chyev Sfucu samd
Plastieiey timdRx 13.9
shr‘fatye Limit 6.2%
Probabb E.rrpuuion 2.6% WY=)
Prsbrble Expanriou tests weta run from an Jr-dry condlttan to l
aatarated eoadltian at I. OPBZ
Specifications for Construction of Controlled Fills
CONSTRUCTION OF CONTROLLED FILLS
GENERAL DESCRIPTION: This item shall consist of all clearing and grubbing,
removal of existing structures and foundations, preparation of land to be filled,
filling of the land, spreading. compaction and control of the fill, and all other
subsidiary work necessary to complete the grading of the filled areas to con-
form with the lines, grades and slopes as shown on the accepted plans
CLEARING. GRUBBING AND PREPARING AREAS TO BE FILLED.
(a) All timber, logs, trees, brush and ot,her rubbish shall be removed, piled
and burned or otherwise disposed of so as to leave the areas that have been
disturbed with a neat and finished appearance free from unsightly debris,,
jb) Ail vegetabie matte2 stiall ‘;x re;wc: .<.i. From U’QP i:,;~.if.ac,e upon which the fill
is to be placed, ;r!x! .c.‘r-,c s: rfr ,< 1 e shall. t\:ti, ‘Le sc:i:fied 10 a deprb, of at least six
inches (6”) and until !hc swtdce is f:ee from rw,:s. nurwnocks cr other uneven
features which wotrld tend 10 prevent uniform compaction by the equipment to be
used.
(c) Fills over three feet (3’) high shail have steps cut in the original ground at
two foot vertical intervals on the slope The sleps sh;ll be eighteen inches (18”) wide, more or less. and ma:/ be constrwted by dozing or biading The
general direction of the bench shall run parallel witn the c~ountours and the
maximum slope shall be three horizontal units to one vertical unit
id) After the foundation for the fill has been cleared or scarified~, it shall be
disced or bladed until it. is uniform and frte from large clods brought to the
proper moisture content and compacted to not less than 90% of maximum density
in accordance wit,h A So T M D1557-58T No fill shall be placed until t,he
soils engineer has given written clearance that the foundation is acceptable for
receiving fill
MATERIALS; Material for the f-11 shall be free frow vegetable matter and
other deleterious substances and shall not ccni:am rocks or lumps of greater
dimensions than sir inches (6”) No pockets of rock,s ehali, be allowed
PLACING SPREADING AND COMPACTlNG FiLL MATEIXIAE, -------__- -_------
(a) The selected fill materi shaii he piaced in laye:; s whi,cb when compacted>
shall not exceed six inches ro”j Each layer shall be spread evenly and shall
be thoroughly blade mixed d.uring the spr esdi g :x, irxure u~i.formit.y of material
in each layer
Form if78 -I-
(b) When the moisture content of the fill materials is low, water shall be added
to bring the fill within the specified density range.
(c) When the moisture content of the material is above that specified by the
density range, the fill material shall be serated by blading or other satisfactory
methods until the moisture content is within the density range.
(d) After each layer has been placed, mixed and spread evenly, it shall be
thoroughly compacted to not less than the specified maximum density in accor-
dance with A. S. T. M. D1557-5gT. Compaction shall be by means of tamping
or sheepsfoot rollers, multiple-wheel pneumatic-tired rollers or other types
of rollers. Rollers shall be of such design that they will be able to compact
the fill to the specified moisture content. Rolling of each layer shall be contin-
uous over its entire area and the roller shall make sufficient trips to insure
that the desired density has been obtained.
(e) Fill shall be compacted one foot beyond the finish grade line and cut back
to grade line by removing fluff and undercompacted fill.
(f) Field density tests shall be made by the soils engineer at intervals not
exceeding two feet of fill height provided all layers are tested. Where sheeps-
foot rollers are used, the soil may be disturbed to a depth of several inches.
Density readings shall be taken in the compacted material below the disturbed
surface. When these readings indicate that the density of any layer of fill or
, portion thereof is below the required density, that particular layer or portion
shall be reworked until the required density has been obtained.
(g) The fill operation shall be continued in six inch (6”) compacted layers, as
specified above, until the fill has been brought to the finished slopes and grades
as shown on the accepted plans.
SUPERVISION: Supervision by the soils engineer shall be made during the fill
and contracting operations so that he can certify that the fill was made in accor-
dance with accepted specifications.
SEASONAL LIMITS: No fill material shall be placed, spread or rolled while it
is frozen or thawing or during unfavorable weather conditions. When the work
is interrupted by heavy rain, fill operations shall not be resumed until field tests
by the soils engineer indicate that the moisture content and density of the fill are
as previously specified. In the event that, in the opinion of the engineer, the soils
unsatisfactory for grading purposes are encountered, they shall not be ‘incorporated
in the grading and disposition will be made at the engineer’s discretion.
Form #7g -2-