CIVE3510
CIVE3510/CW1/2024
Foundation Engineering Fundamentals
Foundation Design – Foundations for water tank
-
Aim
•
to select characteristic ground properties
•
to identify potential hazards and failure mechanisms
Skills
Outcome
Brief
•
to design suitable foundations for a shopping unit
outline the problem to be solved by identifying the ground properties and hazards.
• produce effective, economic design of foundations.
•
develop an understanding of methods used to calculate ultimate limit state and serviceability
limit state for a variety of foundation types.
design of suitable foundations considering the soil conditions and the environmental and
anthropogenic loads.
• an economical design.
Structure
You must produce design calculations for two foundation schemes for a proposed water tank in
Leeds. The steel tank is 12m tall and 20m in diameter. It is supported by a 10m diameter
reinforced concrete pedestal structure. The minimum water pressure at the base of the pedastal is
100kPa.
The water tank is an urban area and is surrounded by a paved area. The pavement is made of
0.5m subbase with block paving such that the surface of the block paving is at the original
ground level. Assume an imposed load due to traffic of 5kPa.
Soil Conditions
Soil type
Elevation
of top of
Unit
weight
SPT
layer
kN/m³
Undrained*
shear
strength kPa
Coef. of* volume
compressibility
m²/MN
Coef. of
consolidation
m²/yr
[MAD]
topsoil
10.0
16
alluvial clay
9.7
17
%
0.4
1.5
= 1
alluvial sand
stiff clay
8.7
12
5.7
20
70+2z
0.1-0.001z
0.3
*
* z measured from ground surface
Tasks
The ground water level at the time of the investigation in June was 1m below ground level.
Requirements
You are required to produce two suitable foundations for this scheme with supporting
calculations and assumptions. The designs should be technically sound, economic and safe.
Costs
The bill of quantities is attached. If you wish to consider other items, please request a rate.
There are three tasks to complete. The first two tasks will be formative, i.e., they will be marked
and will be used to give you feedback. The marks will not count towards the final assessment.
You need to complete these tasks to design the foundations.
This first task helps you to define the problem to be solved. It should be submitted to the VLE
by the end of 23rd February 2024.
1 This task is an overview of the hazards including the loads and ground conditions you will
consider when designing your foundations. In addition to the hazards, you should also include
your calculations for the loads. This submission should include:
•
•
A cross section of the structure and the ground conditions showing the loads acting on
the structure.
A table listing the environmental and anthropogenic hazards that impact on the
structure.
•
A table listing the hazards the structure imposes on the environment.
•
•
Details of the load calculations.
A table listing the combinations of loads you will consider in your design.
You also need to include the serviceability criteria you will design to, i.e., the maximum
allowable settlement, and the maximum differential settlement or tilt.
The second task helps you set out your preliminary thoughts on possible design solutions that
address the hazards you identified in Task 1. You must submit to the VLE by the end of 8th
March 2024.
This task is a list of assumptions that you will make to produce the design covering the client
and statutory requirements, the technical aspects of the design (e.g., combinations of actions, soil
properties) and possible conceptual designs. This submission should include:
•
•
A table listing assumptions that cover the client and statutory requirements, and the
technical aspects of the design (e.g., combinations of actions, soil properties).
Drawings showing a number of conceptual designs explaining how they address the
hazards you have identified in Task 1. The final designs will be a shallow foundation
and a deep foundation. For Task 2 you can produce as many conceptual designed as
you wish.
The final task, and the one which counts 30% towards the assessment, is the design report for
two alternative designs with supporting calculations. You must submit to the VLE by the end of
2024.
The design calculations can be typed or handwritten. If you choose to submit typed calculations,
they should be presented in a similar manner to the hand calculations and be fully explained. An
example of how to set out design calculations is to be found on Minerva. No matter which
method you use, the presentation of the calculations will be assessed.
The design report should include the following:-
A cover sheet including the title, date and name of the author.
Summary (up to 300 words)
Contents list
Introduction including clearly stated requirements.
Description of the hazards and resulting loads
1.
2.
3.
4.
5.
6.
7.
Overview of the conceptual designs
8.
Overview of the final design
9.
10.
References
Appendices containing design calculations.
11.
Bill of Quantities
Description of the assumptions
The body of the report (Sections 1 to 9) should be typed in Times New Roman 11pt with single
line spacing. Headings should be in bold and numbered 1, 1.1, 1.2, 2 etc. and should be
preceded by one line. Paragraphs must be single line spacing, left justified with a single line
between the paragraphs. Margins should be 2.54cm top, bottom and right and 3.17cm left.
The Harvard system should be used for references.
2 Support
Marking
All tables and figures in the body of the report must have a title and be numbered. It is important
to include figures as they help the explanation. However, if a figure is included then you must
ensure that it is discussed in the report.
The calculations should be attached as an appendix. All assumptions and sources of information
should be clearly stated. Calculations should be supported by figures.
The body of the report (Sections 4 to 8) must not exceed five pages.
This project is a core component of the module CIVE3510 Foundation Engineering
Fundamentals. You are expected to use the following:
•
•
Course notes, which cover the information you need to complete the design.
Lectures and their recordings which expand on the information you need to complete
the design.
Screencasts which describe calculations for typical foundation schemes.
•
•
Q&A which addresses any questions you have.
•
Design guidelines, British Standards and Eurocodes.
The first two reports are formative to give you feedback on your design. No marks will be given
for late submission. The marking schedule for the final report will be as follows:-
1.
Presentation
10%
2.
Statement of assumptions
10%
3. Hazard identification
10%
4.
Load combinations
10%
5.
Design method and conceptual design 20%
6.
Calculations
20%
7.
Overall design
20%
You must demonstrate that your design satisfies ultimate limit state and serviceability criteria.
In addition, you must produce a Bill off Quantities.
The final design must be submitted by to the VLE by
2024.
B G Clarke
January 2024
3 Bill of Quantities
Item
Site Preparatory works
Unit
Cost
Total
Quantity
Total Cost
Excavation in sand including disposal
m³
80
Excavation in clay including disposal
m³
120
Excavation in gravel and made ground including disposal
m³
150
Working Platform 1200mm deep cement/soil mixing
m²
120
Working Platform 1200mm reinforced gravel raft
m²
120
Sub Total
Shallow Foundations
Excavation in sand including disposal
m³
80
Excavation in clay including disposal
m³
120
Excavation in gravel and made ground including disposal
m³
150
Excavation below water table (additional cost)
m³
50
Mass concrete
m
60
Reinforced concrete
m³
120
Formwork support for foundations
m²
50
Imported fill
Deep Foundations
m³
80
Sub Total
Excavation in sand including disposal
m³
80
Excavation in clay including disposal
m³
120
Excavation in gravel and made ground including disposal
m³
150
Excavation below water table (additional cost)
m³
50
Formwork support for foundations and pile caps
m²
50
Mass concrete
m³
60
Reinforced concrete
m³
120
CFA piles
Steel piles
tonne
750
tonne
1050
Sub Total
Total for Preferred Solution
4
