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8/20/2019 Site Investigation Work
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INTRODUCTION
Before a civil engineering work is done,adequate site investigation should be ade in
advance!"ufficient inforation necessar# to #ield a safe and econoic design and does lead
to $robles during construction!"ite investigation involves e%$loration of the soil
conditions surface and below the surface!it is $rerequisite for designed to ensure a structure
or earthwork running good and econoical as far as $ossible!Inforation fro site
investigation of the actual soil conditions a# result in serious daage to the structure to
the built later!
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OB&'CTI('
• To identif# whether the site suitable for works that in suggest
• To enable one designs that is safe and econoic
• To $redict and taking a$$ro$riate easure to overcoe an# co$le%it# which
ight arose during construction that due to soil conditions and locali)ed state others
• To investigate incident or reason occurrence of state change whether innatel# or due
to different sub*ect!
T+'OR
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-or $ur$ose of calculation the gruff design of the $ur$osed $ilot or an engineering
$ro*ect,the $ro$erties of the soil under consideration is usuall# based on data obtained fro
test conduted in the laborator# on soil sa$les taken during the re$resentative investigation
work!-ield and the t#$e of qualit# site investigation work is i$ortant and will onl# be
deterined after taking the laborator# test!The result of the investigation should include the
sa$le si)e qualit# and frequenc# of sa$ling!
.eotechnical engineers $erfor geotechnical investigations to obtain inforation on the
$h#sical $ro$erties of soil and rock underl#ing /and soeties ad*acent to 0 a site to design
earthworks and foundations for $ro$osed structures,and for re$air of distress to earthworks
and structures caused b# subsurface conditions!1 geotechnical investigation will include
surface e%$loration and subsurface e%$loration of a site!"oeties,geo$h#sical ethods
are used to obtain data about sites!"ubsurface e%$loration usuall# involves in2situ testing
/two coon e%a$les of in2situ tests are the standard $enetration test and cone
$enetration test!In addition site investigation will often include subsurface sa$ling and
laborator# testing of the soil sa$les retrieved!The digging of test $its and trenching
/$articularl# for locating faults and slide $lanes0 a# also be used to learn about soilconditions at de$th!3arge diaeter borings are rarel# used due to safet# concerns and
e%$ense,but are soeties used to allow a geologist or engineer to be towered into the
borehole for direct visual and anual e%aination of the soil and rock tratigra$h#!
1 variet# of soil sa$lers e%ist to eet the needs of different engineering $ro*ects!The
standard $enetration test /"4T0,which uses a thick2walled s$lit s$oon sa$ler,is the ost
coon wa# to collect disturbed sa$les!4iston sa$lers,e$lo#ing a thin2walled
tube,are ost coonl# used for the collection of less disturbed sa$lers!5ore advancedethods,such as ground free)ing and the "herbrooke block sa$ler,are su$erior,but even
ore e%$ensive!
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51T'RI1361441R1TU"
+and auger
The weights
Tare
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DI"CU""ION
Based on that results,this soil unsuitable for construction because given the level of oist
soil!Readings of the wet soil higher than the reading of the dr# land!This $roves this land
unsuitable for construction!
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CONC3U"ION
In conclusion,land research is an i$ortant as$ect in a civil engineering construction
$ro*ect!It is one $recautionar# easure in a $ro*ect which will in anaging,this is to avoid
occurrence of crack in wall,break in floor,settle into soil and others incident that is
likel#!3and research was to get inforation on soil conditions and enable design that is
sufficient can in $re$are also identif# an# inconvenience that will be eerging during
construction and the ethod of solution!-or safet# of building and the resident,b# search
details ust be carried out to know clearl# land incident essential $ro$erties!
In $ractical that carried out this can be concluded that land have huidit# de$ends on
weathering condition!3and disturbed ado$t with interference condition that is iniu to
aintain site actual situation!Can be concluded land that have huidit# weight higher than
dr# land!7etland need to be tested before hand to does not ha$$en undiserable thing during
construction carried out!