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CN106 Engineering Surveying
sSchool of the Environment
Semester 2 Examinations 2005-2006
CN106
ENGINEERING SURVEYING
Instructions:
Time allowed: TREEhours
!n"wer: Answer!##uestions
Item" "$%%lied: !athematica" #ormu"ae
!ll wor&in' m$"t (e "hown
$e%nes%ay & 'une 2005 (:)0 -12:)0 hours
*age 1 o+
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CN106 Engineering Surveying
)$e"tion 1
*a+ ,uring a two-eg test on a "eve". +our oints E. #. / an% are egge%
out in a straight "ine such that E# #/ / 25 m
3ea%ings ta4en with a "eve" at # gave va"ues o+ 1(0& m an% 1&)2 mon "eve""ing sta++s he"% vertica""y at E an% / resective"y $ith the "eve"at . rea%ings o+ 201 m at E an% 161 m at / were o7taine%
Ca"cu"ate the co""imation error o+ the "eve" an% state i+ a%8ustment isreuire%
96 mar4s
*(+ ;he +o""owing measurements were recor%e% using a tota" station %uringa %etai" survey
At station A 3< 1(1&5 meight o+ tota" station a7ove A 1(5 meight o+ re+"ector 9rism on %etai" o"e 1)50 m
,oint"i'hted
ori-ontalan'le
Verticalcircle
readin'
Slo%edi"tance
1 00= 55> 20? &= 0)> 10?
)1&5 m
2 &)= 1(> )0? (2= 1&> 50?
50& m
) = )6> 00? (= 00> 20?
2&)65 m
Ca"cu"ate the heights o+ oints 1. 2 an% )9& mar4s
*c+ ;he o7servations given 7e"ow were ta4en with a tota" station
Total"tation%o"ition
Reflector%o"iti
on
ori-ontalcircle
readin'
Vertical an'le Slo%edi"tance
@ A 11&552 02)5 25)6 m
@ B 220))05 022& 205 m
*age 2 o+
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CN106 Engineering Surveying
Ca"cu"ate the horiDonta" %istance 7etweenA an% B9&mar4s
*age ) o+
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CN106 Engineering Surveying
)$e"tion .
*a+ ;he measure% ang"es an% "engths o+ a c"ose% o"ygon traverse aregiven 7e"ow
!n'le /("erved an'le #ine ori-ontal len'th
A &000 AB 102612 m
B 111&20 BC 10625( m
C (&60 CD 10)0 m
D 6)1600 DA 1651 m
Ca"cu"ate the +ractiona" "inear misc"osure +or the traverse91 mar4s
*(+ ;he coor%inates o+ three contro" stations P. Qan% R are given 7e"ow
Station Coordinate"
mE mN
P 5621 2&01(
Q 25)62 )0)0
R 1(&5 )525&
Ca"cu"ate the interna" ang"es an% "engths o+ the triang"e PQR+orme% 7ythese stations
96 mar4s
*age o+
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CN106 Engineering Surveying
)$e"tion
;he corners o+ a rectangu"ar 7ui"%ing B1. B2. B) an% B are to 7e set outusing a tota" station an% site gri% oints S1 an% S2 ;he coor%inates o+ the7ui"%ing corners an% oints S1 an% S2 are:
Site 'rid %oint or($ildin' corner
Coordinate"
mE mN
B1 500000 500000
B2 5126 505(1&
B) 51620 (21)
B 50)5(2 (22(6
S1 525000 525000
S2 525000 &5000
9a I+ site gri% oint S2 is inaccessi7"e 7ut can 7e sighte% +rom S1.ca"cu"ate the %ata reuire% to set out a"" the 7ui"%ing corners +rom sitegri% oint S1
910 mar4s
97 ;he setting out is chec4e% 7y measuring a"" the 7ui"%ing si%es an%%iagona"s with a )0 m stee" tae "ai% on the groun%
#or the %iagona" +rom B1 to B) the +o""owing measurements wereta4en:
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CN106 Engineering Surveying
)$e"tion
An existing sewer at A is to 7e exten%e% to a oint B on a +a""ing gra%ient o+ 1in 10;he horiDonta" %istance AB (615 m
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CN106 Engineering Surveying
)$e"tion 2
10 !u"ti"e choice uestions*"ease choose the !S; C33EC; ANS$E3 +or each uestionI+ you thin4 the answer to Fuestion 51 is e write 231 4 ein your answer 7oo4
3eeat +or a"" other uestions
T5/ mar&" each
51 ;he main urose o+ engineering surveying on a construction site is to
a *ro%uce mas or "ans o+ the site7 !easure an% cost vo"umes o+ materia" move% aroun% the sitec Carry out as-7ui"t surveys +or a ro8ect% Ensure that the ro8ect is 7ui"t with the correct %imensions
e !onitor +or structura" movement
52 #or traversing. a reconnaissance is carrie% out to
a !a4e sure the survey euiment to 7e use% is avai"a7"e7 !a4e sure that the site is accessi7"ec 00? is the +irst rea%ing7 ;wo roun%s must 7e ta4en to chec4 +or any mista4esc n"y one roun% can 7e ta4en% #ace right rea%ings are not necessarye None o+ these a"y
5 ;he who"e circ"e 7earing o+ a "ine
a Is a"ways an ar7itrary %irection chosen +or convenience7 Is measure% antic"oc4wise +rom a chosen north %irectionc
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CN106 Engineering Surveying
56 ne o+ the a%vantages o+ using /*S on site is
a It is not exensive to insta""7 It is much more accurate than using tota" stationsc It can measure heights much more accurate"y than 7y "eve""ing% It is use% 7y one erson when setting oute None o+ these
5& 3otating "aser instruments are use% in surveying +or
a !easuring ang"es an% %istances7 Setting out using coor%inatesc *ie"aying%