BENHA UNIVERSITY
FACULTY OF ENGINEERING _SHOUBRA
SURVEYING DEPARTMENT
UNDERGROUND SURVEYING
SEMESTER ONE
SECOND YEAR
COURSE CODE: SUR211
2015 – 2016
Illustrate your answers with sketches.
Assignment (8)
1. Explain in full detail the wire centering apparatus.
2. Discuss the method of correlation using the ‘’Weisbach Triangle’’ stating its
advantages and disadvantages and giving the ideal conditions for such a system.
3. Explain in detail the method of quadrilateral (Hause) which applies at the vertical opening
for transfer the meridian.
4. Explain in full detail indirect and direct correlation survey through two vertical shafts.
5. Two Weisbach triangles were established ion the wire lines W1 and W2 plumbed
through a vertical shaft. It is required to find the azimuth of the underground base line
XY assuming that the azimuth of a surface line AB is 89° 00' 00''.
Surface Measurements
W1W2 = 10.000 m
W1T1 = 5.000 m
W2T1 = 15.000 m
<BAT1 = 90o 00' 00''
<AT1W2 = 260o 00' 00''
<W1T1W2 = 0o 01' 20''
Underground Measurements
W2T2 = 4.000 m
T2W1 = 14.000 m
<W2T2W1 = 0o 01' 50''
<w1T2X = 200o 00' 00''
<T2XY = 240o 00' 00''
6. The following observations were taken to a braced quadrilateral CDW1W2. At the
surface, the clockwise angles were made to a surface base line AC, which had a
bearing of 210° 40' and ACD = 72° 10', DCW2 = 35° 20', W2CW1 = 53° 12', W1DC =
40° 25', W2DW1 = 42° 38', CD = 7.25 m. Calculate the distance and bearing of W1W2
7. The aligning collar was used to determine the vertical position of a steel wire during
shaft plumbing to project the surface station to the underground. The observed
readings on the two scales of the aligning collar were as follows:
Reading on the x – scale
Left
Right
27.65
27.35
26.30
26.10
25.83
25.73
24.95
24.65
23.01
23.45
Reading on the y – scale
Left
Right
28.75
21.25
27.63
22.37
26.82
23.18
25.53
24.47
Eng. Tamer Saleh
BENHA UNIVERSITY
FACULTY OF ENGINEERING _SHOUBRA
SURVEYING DEPARTMENT
UNDERGROUND SURVEYING
SEMESTER ONE
SECOND YEAR
COURSE CODE: SUR211
2015 – 2016
8. The following observations were taken to Underground traverse ABCD. The bearing of
AB = 282°, AB = 5.1 m, CD = 4.5 m, CE = 36 m, BCA = 38° 15' 32''
ACD = 48° 10' 30''
CDB = 56° 16' 08''
BDA = 55° 26' 10''
DCE = 62° 24' 10''
If the coordinates of point D (1126 N, 1246 E, 52) m. calculate the coordinates of point E.
Where, the depth of the vertical shaft is 30 m, the instrument height at C = 1.75 m, the vertical
angle from C to E (+ 05° 12'), and a drop of plumb bob at E is 0.68 m. (Note. Point C on the
ground into the tunnel).
9. The coordinates of two surface stations E and F were determined by means of a connecting
survey to the nearest geodetic control network. Underground traversing procedure were then
carried out between the vertical wires plumbed at E and F. The coordinates of E, F and the
underground traverse measurements were as follows. It is required to calculate the
coordinates of the traverse.
St.
Line Length(m) Horizontal angle
―
A
AB
―
Coordinates
E(m)
N(m)
―
152.89
240o 14' 48''
B
BC
163.18
144o 15' 16''
C
CD
161.23
―
D
DE
125o 10' 28''
214.62
429.21
279o 59' 12''
388.23
98.17
―
F
FA
―
144.54
E
EF
―
132.64
Eng. Tamer Saleh