DIPLOMA IN CIVIL ENGINEERING

DCC30112 - GEOTECHNICAL & HIGHWAY

ENGINEERING LABORATORY

LABORATORY REPORT

Experiment Title
Section
Student Name
Matric No.
Lecturer’s Name

Date of Experiment : _______________

CLO 3: Analyse PLO 4 Investigations: Conduct investigations of well-defined DP1: Depth of Knowledge Required
laboratory result in problems; locate andsearch relevant codes and catalogues, conduct DP3: Depth of Analysis Required
achieving objective of standard tests and measurements DK6: Practical Engineering Knowledge
geotechnical and
highway using
engineering report
standard.
T axonomy Criteria Excellent Very Good Good Fair Unsatisfactory Marks
Domain / 5 4 3 2 1
Level
Report Result Presentation (Raw Data/Value/ Plan/ Graph, etc) *if any
Analysis Professional Accurate Accurate Incomplete Data are not
looking and representation of representationsof result, major shown or are
accurate the data in tables the data in written mistakes. inaccurate.
representation of and/or graphs. form, but no
the data in tables graphs or tables
and/or graphs. are presented.
Graphs and tables
are labelled and
titled.
Calculation
Calculation and More than 50% 50% calculation Less than Calculation and
description calculation and and description 50% description are
complete, clear, description complete, complete, clear, calculation not complete,
accurate and clear, accurate and accurate and and clear, accurate
detailed. detailed. detailed. description and detailed.
complete,
clear, accurate
and detailed.
Result Discussions
Some points of Some points Very few points
All point of Most points of
discussion on of discussion of discussion,
discussion on the discussion on
results obtained on results not properly
results obtained results obtained
covered and obtained elaborated.
covered and covered and
elaborated. covered and
elaborated. elaborated.
but not
properly
C4 elaborated.
Conclusions
Elaborated Conclusions drawn Draw weak Little effort to Conclusions are
conclusions relate relatethe data conclusions to relate data to not related to
the data obtained to obtained to the relate data to theory. data andtheory.
relevant theories and relevant theories. theory.
suggest method
improvements.
Report Apply a standard format of report (Cover page, title, presentation and tidiness)
Standard Beyond Follow the correct Follow the Limited Unable to use a
applicable to standards/ correct extent of correct standard/
thestandard/ documents/codes. standards/ applicable documents/
documents/ documents/ standards/ codes.
codes. codes with documents/
guidance. codes.
Completion of report within the time given
Report on time. Report is longer than Reports are Reports are Reports send
1 day from time delayed more delayed by 3 - after one week
specified. than two days 4 days from from the
from the specified time to time. specified time.
time.
Reflection Reflection
Demonstrate a Demonstrate a Demonstrate a Demonstrate a Demonstrate
thorough thoughtful basic limited little or no
understanding of the understanding of the understanding of understanding understanding of
practical work practical work the practical work of the practical the practical
performed. An in performed. performed. work work performed.
depth analysis of the A basic analysis of A basic analysis performed. T his reflection
learning experience. the learning of the learning T his needs revision.
experience. experience. reflection
needs
revision.
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GEOTECHNICAL ENGINEERING LABORATORY

MACKINTOS H PROBE TEST

NAME

MATRIC NO.

OBJECTIVE
Determination of the soil profile and bearing capacity in the site.

INTRODUCTION

The Mackintosh Probe Test is a simple and economic testing method to gather preliminary data on sub surfa ce
conditions. Such as data maybe adequate for the designs of foundations for lightly loaded structures as this
provides a very economic method of determining the thickness of soft deposits such as peat. The Mackinto sh
prospecting tool consists of rods which can be threaded toge ther with barrel connectors and which are normally
fitted with a driving point at their base, and a light hand-operated driving hammer at their top. Probing is carrie d
out rapidly, with simple equipment. It produces simple results, in terms of blows per unit depth of penetration,
which are generally plotted as blow-count/depth graphs.

Probe JKR has “steel pointer” a diameter of 25 mm and cone 60° cone. “pointer” is connected to a steel rod.
Steel rods uses are of 12 mm diameter and length of HY 55c is 1.2 m. The steel rods can be connected to one
another using coupling. If the soil is not strong, probe JKR can be used up to the depth of 15 m. there is a
difference between the probe JKR and Mackintosh probe.

Table 1: Difference between the Probe JKR and Mackintosh Probe

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APPARATUS

a. Steel Rod 1.2m long and 12.5 mm diameter

b. Cone Penetrometer 25 mm diameter
c. Coupling
d. Drop Hammer 5 kg
e. Measuring tape
f. Chalk
g. Puller/Lifting tools

PROCEDURE

a. Connect steel cone to the bottom of a steel rod.

b. Straighten the steel rod perpendicular to the ground surface on the point to be tested.
c. Measure every 0.3m length of the steel rod and mark it with a chalk.
d. Lift the hammer to the maximum position and then release.
e. Count the number of blows that causes the rod to penetrate 0.3m.
f. Record the data for the number of blows for every 0.3m penetration into the Mackintosh Probe
test form.
g. Remove the hammer set, and connect a new steel rod on top of the original rod in the final
0.3m.
h. Mark again the rod for every 0.3m interval. Continue with the hammer blows and repeat the
same work process.
i. The blows should be stopped when:
i. Numbers of blows reach 400 times for a 0.3m penetration because the soil has
high bearing capacity, or
ii. The depth of penetration reaches 15m. Detail site investigation is required by
using boring test.
j. Clean the steel rod, steel cone and connector after they have been used.

Figure1: Mackintosh Probe equipment

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DATA

CALCULATION 1

1. Calculate the cumulative no. of blows for each depth 0.3m.

2. Plot the graph of depth against cumulative no. of blows, from the graph draw a cross sectional
view of the tasted soil layer.
3. No. of blows / 0.3m, shall be calculated from the equation

4. Determine the bearing capacity of each layer according the stand bearing capacity against no.
of blows/0.3m

RESULT 1:

Depth No. of blows / 0.3m Cumulative no. of blows

0.0 – 0.3
0.3 – 0.6
0.6 – 0.9
0.9 – 1.2
1.2 – 1.5
1.5 – 1.8
1.8 – 2.1
2.1 – 2.4
2.4 – 2.7
2.7 – 3.0
3.0 – 3.3
3.3 – 3.6
3.6 – 3.9
3.9 – 4.2
4.2 – 4.5
4.5 – 4.8
4.8 – 5.1
5.1 – 5.4
5.4 – 5.7
5.7 – 6.0
6.0 – 6.3
6.3 – 6.6
6.3 – 6.6
6.6 – 6.9
6.9 – 7.2
7.2 – 7.5
7.5 – 7.8
7.8 – 8.1
8.1 – 8.4
8.4 – 8.7
8.7 – 9.0
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9.0 – 9.3
9.3 – 9.6
9.6 – 9.9
9.9 – 10.2
10.2 – 10.5
10.5 – 10.8
10.8 -11.1
11.1 – 11.4
11.4 – 11.7
11.7 – 12.0

RESULT 2:

Depth No. of blows Bearing Capacity Bearing Capacity

(ft) R) (lbs/ft2 ) (kN/m2 )
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CALCULATION 1

1. Determine the bearing capacity (kN/m2 )

2. Plot a graph of depth against the no. of blows

3. Determine the bearing capacity using standard chart at a depth of 5ft, 10ft, 15ft and so on

Figure 2: Bearing capacity graph chart

Prepared by: Verified by:

(RENNY JOSEPH) (RONNIE PATRICK MASIDA)

Date: 08 Mac 2021 Date: 08 Mac 2021
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( /5 Marks)
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ANALYSIS

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DISCUSSION

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CONCLUSION

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REFERENCES

1.

2.

3.

4.

5.

( /5 Marks)
 Name :

Reg. No. :
Lab :
Date :

REFLECTION MARKING RUBRIC

Excellent Good Moderate Fair Unsatisfactory

No. Criteria
10 8 6 4 2
4. Reflection  Demonstrate a thorough  Demonstrate a  Demonstrate a  Demonstrate a  Demonstrate little or
understanding of the thoughtful basic limited no understanding of
practical work understanding of understanding of understanding of the practical work
performed. the practical work the practical work the practical work performed.
 An in depth analysis of performed. performed. performed.  This reflection needs
the learning experience.  A basic analysis  A basic analysis  This reflection revision.
of the learning of the learning needs revision.
experience. experience.

REFLECTION
Write a reflection that explain what did you learn as a result from your practical work. A reflection must
be included after each practical work that you did. Place this reflection in your lab sheet, directly after
you completed your practical work.