INS 332E - FOUNDATION ENGINEERING I
DESIGN TERM PROJECT
A housing estate in European Side of Istanbul is planned to be constructed. Figure 1 shows
the project plan of the site layout. Each contractor is responsible for constructioning a
building, a retaining structure and earthworks of a recreation area of a slope.
According to the contract between the owner and the contractors, the contractor is only
responsible for geotecnical design and construction of the foundation systems, in other words
structural design of the foundation and the shoring system is out of the contractor’s
responsibility. The contract value is 1500.000 TL and the contract duration is 30 days. The
contractor should pay a penalty of 2.000 TL/day in the case of a delay. On the other hand, the
contractor will receive an early finish bonus of 1.000 TL /day if the project is completed
before the promised due date. Number of storeys and the superstructural loads for each
building are given in Table 1. The unit prices are presented in Table 2. The productivity
values of the activities are given in Table 3. Interaction of the adjacent buildings is ignored in
scope of the design procedure.
Analyze the project for two different engineering solutions. Discuss the alternatives according
to the two criteria given; cost and time of construction. Choose the best alternative, explain
the reasons for your choice and write a short method of statement in the discussion part of
your report.
Table 1: Number of Storeys and superstructural loads for the buildings
Building Code
B1
B2
B3
B4
B5
Properties
2B+G+19F
2B+G+19F
1B+G+19F
1B+G+19F
1B+G+19F
Load per storey (kPa)
18
17
15
14
16
Table 2: Unit prices of the construction activities
Activity ID
Description
Unit
Unit Price (TL)
1
Bored Pile Φ65 cm*
m
190
2
Bored Pile Φ80 cm*
m
240
3
Bored Pile Φ100 cm*
m
310
4
Raft Foundation (H=2m) **
m2
500
5
Jet Grout III Φ65 cm
m
45
6
Stone Column Φ75 cm (Wet-Top)
m
55
7
Dynamic Compaction
m2
15
8
Reinforced concrete retaining structure
m³
200
9
Land acquisition
m²
500
10
Excavation
m³
16
11
Earth fill
m³
14
*Regarding the unit prices of bored piles, drilling, installation of the reinforcement cage and
pouring of concrete is included.
**Regarding the unit price of raft foundation, preparation and installation of reinforcement
and pouring of concrete is included.
Table 3: Unit time of the construction activities
Activity ID
Description
Unit
Productivity
1
Bored Pile Φ65 cm*
m/day
100
2
Bored Pile Φ80 cm*
m/day
100
3
Bored Pile Φ100cm*
m/day
100
4
Raft Foundation (H=1m)
m2/day
150
5
Jet Grout III Φ65 cm
m/day
150
6
Stone Column Φ75 cm (Wet-Top)
m/day
300
7
Dynamic Compaction
m2/day
400
8
Excavation
m³
150 m³/Day
9
Earth fill
m³
100 m³/Day
10
Reinforced concrete retaining structure
m³
40 m³/Day
Report Content
Week of
Report Format
Content
1. Introduction
 Write a description of the problem.
delivery
 Draw a line on Figure 1 to show the place of your cross-section.
2. Soil profile
 Request the borehole data for the site from your instructor.
 Draw the layering of soil stratums, ground water elevation, etc.
 Analyze in-situ test data.
 Ask the instructors for necessary soil parameters
 Report all your findings, drawings and decisions (i.e. I decided to study
1st
with BH1, BH2 and BH3 (borehole data and soil parameters..., etc
Report
because…).
3. Geotechnical
 Analyze stability of the slope given in the layout plan
Engineering
 Perform stability checks of the retaining wall as will be shown in the plan
Design (a)
 Report the calculations and drawings for the two acceptable engineering
design (i.e. I choose …. as a draft design, but finally redesign by……….to
achieve stability.)
 Write a method of statement for the two solutions
4. Geotechnical
 Decide two alternative engineering solutions for the foundation system.
Engineering
 Analyze the amount of the settlement
Design (b)
 Analyze the stability of the solutions
 Report the calculations and drawings for the two acceptable engineering
design (i.e. I choose …. as a draft design, but finally redesign by……….to
achieve stability.)
 Write a method of statement for the two solutions
Final
5. Time Planning  Determine the time required for each design.
Report
and Cost
 Determine the cost for each design.
Accounting
 Discuss your solutions in terms of time and cost criteria
6. Conclusion
 Decide on a solution keeping the contract conditions in mind (i.e.
According to the two criteria given, first cost was higher for …or according
to 1st criteria, solution 1 is better or has less cost without paying any
penalty. Therefore I choose…).
7. References
 Refer to all the guidelines, codes and standards used
BH11

BH10

BH1

BH12

BH2

BH7

BH6

BH3

BH13

BH8

BH5

BH4

BH9

BH15

BH14

Figure 1. Layout Plan of the Construction Site