# TBT1220 - Fieldwork practical assignment

```DEDAN KIMATHI UNIVERSITY OF TECHNOLOGY
DIPLOMA IN BUILDING TECHNOLOGY MODULE 3 &amp; 4
TBT1220 – SURVEYING II PRACTICAL SCHEDULE
Semester: Sep – Dec 2019
Field work practical timetable: Tuesdays 2:00 – 5:00 pm
All field work practical will be conducted in groups
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Module 3 – (4 groups)
Module 4 – (4 groups)
Practical 1 (Not assessed):
Topic
Total station surveys
Practical
 Demonstration of the parts of
Total station,
 setting total station over
control points,
 instrument orientation
 measuring instrument height
and reflector pole heights
 setting the instrument and
reflector pole height in total
station.
TBT1220 – SURVEYING II PRACTICAL
Schedule
Week 3 (1st Oct 2019)
All groups
Page 1 of 6
Practical 2
(15 marks):
Total station surveys
Observation of Horizontal and Vertical
angles
Week 4 &amp; 5 (8th and 15th
oct)
Instructions:
You are required to carry out the assignment according to the groups I have created. Check your
group members. The group leaders are assigned and are therefore required to lead the group during
the field work practical.
Horizontal and Vertical angles Observation:
1. By closing the horizon:
Procedure:
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

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
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Set and orient total station of a known control
point (e.g DKUT)
Measure the instrument height and reflector
pole height and set them accordingly in the
total station.
Observe horizontal angles from the
instrument station to the other three new points (e.g. A, B, C)
measure the angles starting with point A to C continuing clockwise and back to A
thereby completing the circle. Record all the readings in face left (clockwise) and face
right (anticlockwise).
Book the vertical angle readings (Zenith angle) for each of the new stations in both faces
(FL &amp; FR)
Compute the misclosures in Face Left and Face Right measurements and apply the
corrections.
Reduce the observations by getting the mean measurements (FL and FR) for each
measured point.
To submit:

A technical report that should include:
o Raw recorded data in the field.
o Sketch showing area where observations were made.
o Final angles measurements.
Submission Deadline: Thursday 17th October 2019
TBT1220 – SURVEYING II PRACTICAL
Page 2 of 6
Practical 3
(15 marks):
Total station surveys
Week 6 &amp; 7 (22nd and 29th
oct)
Instructions:
You are required to carry out the assignment as per the groups created. The group leaders are
assigned and are therefore required to lead the group during the field work practical.
Objective:
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
Field reconnaissance; to select the locations of the new traverse points. Adopt appropriate
control points from these known traverse points to begin and close your traverse network
(DKUT, DeKUT5, DeKUT6, DeKUT7, DeKUT8, DeKUT9, TR1, TR2, TR14, TR15, TR16). Locate
other 4 new points with pegs at distances of about 100 – 150 meters apart within DeKUT
grounds.

Observe whole circle bearings for all the traverse lines in both faces (Face Left and Face
Check for the acceptable error tolerances in angular measurements (refer to your notes).
Our total stations have an accuracy of 7”. Compute and adjust your traverse
Give the new traverse point’s coordinates.
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To submit:

A technical report that should include:
o Raw recorded data in the field.
o A sketch showing the distribution of the observed points.
o Bearing sheet.
o Traverse computations sheets
o Final coordinates list of the new traverse points
Submission Deadline: Thursday 31st October 2019
TBT1220 – SURVEYING II PRACTICAL
Page 3 of 6
List of controls:
PT.ID
NORTHINGS(M)
EASTINGS(M)
ELEVATION
REMARKS
DKUT
9956561.789
272861.243
1773.189 short pillar
DeKUT5
9956706.379
272693.643
1779.596 I.P.C (old)
DeKUT6
9956819.541
272707.334
I.P.C (old)
DeKUT7
9956825.252
272903.573
1781.021 I.P.C (old)
DeKUT8
9956892.362
272848.129
1782.931 I.P.C (old)
DeKUT9
9956898.084
272689.260
1787.609 I.P.C (old)
TR1
9956481.024
273003.383
I.P.C (New)
TR2
9956414.237
273172.486
I.P.C (New)
TR14
9956413.690
273357.500
I.P.C (New)
TR15
9956475.352
273173.593
I.P.C (New)
TR16
9956720.647
272965.678
I.P.C (New)
TBT1220 – SURVEYING II PRACTICAL
Page 4 of 6
Practical 4 (10 marks):
Earthworks
Volume computations using contour
lines
Week 10 (19th Nov 2019)
Volume computations from contours
Materials:
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
Topographical maps scale: 1:50,000
Digital planimeter
1. Identify at least 5 closing contour lines; mostly those indicating depressions or hilly areas
A clip from topo map
showing closing
contours
2. Note the contour interval (vertical interval) from the legend is in feet! Convert the
measurement to meters
3. Measure the areas enclosed by these contour lines using the planimeter and book your
4. Assuming these contours encloses a reservoir, Calculate the volume using
a. Trapezoidal rule for volumes
b. Prismoidal rule for volumes
To submit:
A report that includes:
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The group members
The information on the topographical sheet chosen and a screen shot of the contours
measured.
The volume computations as per number 4 above
Deadline for submission: 14th November 2019
TBT1220 – SURVEYING II PRACTICAL
Page 5 of 6
Practical 5
Curves
(10 marks):
Setting Out horizontal curves
Week 8 &amp; 9 (5th and 12th
Nov 2019)
Horizontal curve staking (Deflection method for stationing) (Refer to your notes pg. 76-78)
Solve this curve ranging problem and implement it on a selected section on DeKUT grounds (Mr.
Julius will direct you on where to implement the curve setting out with pegs on the ground.)
Description of the Curve setting out Problem:
The centre line of two straights is projected forward to meet at I, the deflection angle being 30˚. If
the straights are connected by a circular curve of radius 200m, tabulate all the setting out data,
assuming 20-m chords on through chain-age basis, the chain-age of I, being 2259.59 m.
To submit:
A report that includes:
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
The group members
Calculations of setting out data
Field sketches and photos of implemented set out curves (i.e showing pegs placed on
ground).
Deadline for submission: 21st November 2019
TBT1220 – SURVEYING II PRACTICAL
Page 6 of 6
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