The document discusses soil compaction, including definitions, laboratory testing methods, and benefits. It defines compaction as the densification of soil through expulsion of air using mechanical means. Laboratory tests like the standard and modified Proctor tests are used to determine maximum dry unit weight and optimum moisture content for compaction. Benefits of proper compaction include increased soil strength, reduced settlement, and decreased water flow through the soil.
This is about types of shear failure in soil, describe all the three types of the bearing capacity failure of soil.
This is prepared by (Abdullah Kawkas Galaly) a student in civil engineering department at Salahaddin University in Erbil-Kurdistan region.
This is about types of shear failure in soil, describe all the three types of the bearing capacity failure of soil.
This is prepared by (Abdullah Kawkas Galaly) a student in civil engineering department at Salahaddin University in Erbil-Kurdistan region.
TERZAGHI’S BEARING CAPACITY THEORY
DERIVATION OF EQUATION TERZAGHI’S BEARING CAPACITY THEORY
TERZAGHI’S BEARING CAPACITY FACTORS
Download vedio link
https://youtu.be/imy61hU0_yo
this is the experiment of fluid mechanics .FLOW OVER A SHARP CRESTED WEIR.experiment of weir.from this experiment we can learn discharge over the sharp crested weir and etc.
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
A method of testing soils by pressing a cone of standard dimensions into the soil under a known load and measuring the penetration. (extensive investigation and research in construction site).
About Subsurface investigation, Depth of foundation, Significant depth, Types of investigation, Steps involved, Methods of boring, Types of samples and samplers, Core recovery and RQD.
TERZAGHI’S BEARING CAPACITY THEORY
DERIVATION OF EQUATION TERZAGHI’S BEARING CAPACITY THEORY
TERZAGHI’S BEARING CAPACITY FACTORS
Download vedio link
https://youtu.be/imy61hU0_yo
this is the experiment of fluid mechanics .FLOW OVER A SHARP CRESTED WEIR.experiment of weir.from this experiment we can learn discharge over the sharp crested weir and etc.
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
A method of testing soils by pressing a cone of standard dimensions into the soil under a known load and measuring the penetration. (extensive investigation and research in construction site).
About Subsurface investigation, Depth of foundation, Significant depth, Types of investigation, Steps involved, Methods of boring, Types of samples and samplers, Core recovery and RQD.
This presentation focuses on the significance of soil compaction (particularly the Proctor Test), how the test is performed, necessary equipment and helpful tips.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
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An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
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My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
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Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
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Water Industry Process Automation and Control Monthly - May 2024.pdf
Chapter Seven soil mechanics-I.pdf
1. Chapter Seven
Soil Compaction
BY . DUMESSA GUDISSA (M.Sc.)
June, 2016 G.C
MADDA WALABU UNIVERSITY
Soil Mechanics – I
Lecture Note
2. 1. INTRODUCTION
• Soil compaction is the densification- reduction in void ratio-of a soil
through the expulsion of air.
• This is normally achieved by using mechanical compactors, rollers,
and rammers with the addition of water.
• Soil compaction is the least expensive method of improving soils.
• Thus, compaction results in an increase in the density of the
soil, improves the engineering properties of soils, increases the
shear strength of the soil & consequently the bearing capacity,
reduces the compressibility & permeability of soil.
Definitions of Key Terms
• Compaction - is the densification of soils by the expulsion of air.
• Maximum dry unit weight(𝜸𝐝𝐦𝐚𝐱) is the maximum unit weight that
a soil can attain using a specified means of compaction.
• Optimum water content (𝑾𝒐𝒑𝒕) is the water content required to
allow a soil to attain its maximum dry unit weight following a
specified means of compaction.
3. The difference b/n compaction & consolidation is as follows even
though both cause reduction in volume.
1. Compaction is a rapid process by which a reduction in volume
takes place by mechanical means where as consolidation is a
gradual process of volume reduction by static and uniform load.
2. Compaction is the reduction in volume of a partially saturated soil
mass which takes place as a result of expulsion of air from the
voids at the same water content where as consolidation is the
reduction in volume of a saturated soil mass as a result of expulsion
of water from the soil.
3. Compaction is done artificially to increase the engineering
properties of the soils where as consolidation takes naturally when
soils are subjected to static loads.
1. INTRODUCTION
4. Basic concepts
• 𝜸𝒅 =
𝑮𝒔
𝟏+𝒆
𝜸𝒘 =
𝜸
𝟏+𝒘
=
𝑮𝒔
𝟏+
𝒘𝑮𝒔
𝑺
𝜸𝒘
• The extreme-right-hand term was obtained by replacing 𝒆 by 𝒆 =
𝒘𝑮𝒔
𝒔
• How can we increase the dry unit weight?
• by reduce the void ratio, that is
𝒘
𝑺
must be reduced since 𝑮𝒔 is constant.
• The theoretical maximum dry unit weight is obtained when
𝑺 = 𝟏 𝑺 = 𝟏𝟎𝟎% , that is, 𝒆𝒎𝒊𝒏 = 𝒘𝑮𝒔
5. 2. Compaction Test In The Lab
The laboratory test generally used to obtain the maximum dry unit
weight of compaction and the optimum moisture content is called the
Proctor compaction test(Proctor, 1933).
Objective of compaction test: determining the optimum moisture
content and maximum dry density achievable with a given compactive
effort.
1. Standard Proctor Test method
In the Standard proctor test, the soil is compacted in a mold that has a
volume of 944 cm3.
The diameter of the mold is 101.6 mm (4 in.)
During the laboratory test, the mold is attached to a baseplate at the
bottom and to an extension at the top (Figure a).
The soil is mixed with varying amounts of water and then compacted
in three equal layers by a hammer(Figure b) that delivers 25 blows to
each layer.
6. The hammer has a mass of 2.5 kg(6.5 lb) and has a drop of 305
mm (12 in.).
Figure c is a photograph of the laboratory equipment required for
conducting a standard Proctor test.
2. Compaction Test In The Lab
8. 2. Modified Proctor Test
With the development of heavy rollers and their use in field
compaction, the standard Proctor test was modified to modified
Proctor test which better represent field conditions.
For conducting the modified Proctor test, the same mold is used
with a volume of 944 cm3 (1/30 ft3), as in the case of the standard
Proctor test.
However, the soil is compacted in five layers by a hammer that has a
mass of 4.54 kg(10 lb).
The drop of the hammer is 457 mm (18 in.).
The number of hammer blows for each layer is kept at 25 as in the
case of the standard Proctor test.
The compaction energy for this type of compaction test can be
calculated as 2700 kN-m/m3 (56,000 ft-lb/lb3).
Because it increases the compactive effort, the modified Proctor test
results in an increase in the maximum dry unit weight of the soil.
The increase in the maximum dry unit weight is accompanied by a
decrease in the optimum moisture content.
2. Compaction Test In The Lab
9. 3. Interpretation of Proctor Test Results
the optimum water content and the maximum dry unit
weight of soils is very important for construction
specifications of soil improvement by compaction.
Specifications for earth structures (embankments, footings,
etc.) usually call for a minimum of 95% of Proctor maximum
dry unit weight.
This level of compaction can be attained at two water
contents—one before the attainment of the maximum dry
unit weight, or dry of optimum, the other after attainment of
the maximum dry unit weight, or wet of optimum.
Normal practice is to compact the soil dry of optimum.
Compact the soil wet of optimum for swelling (expansive)
soils, soil liners for solid waste landfills, and projects where
soil volume changes from changes in moisture conditions are
intolerable.
10.
11. Example
1. The wet mass of one of the standard Proctor test samples is 1806
grams at a water content of 8%. The volume of the standard Proctor
test sample is 9.44 × 10−4𝑚3. Determine the bulk and dry unit
weights.
2. The results of a standard compaction test are shown in the table below.
a. Determine the maximum dry unit weight and optimum water content.
b. What is the dry unit weight and water content at 95% standard
compaction, dry of optimum?
c. Determine the degree of saturation at the maximum dry density
d. Plot the zero air voids line.
Water content (%) 6.2 8.1 9.8 11.5 12.3 13.2
Bulk unit weight (kN/m3) 16.9 18.7 19.5 20.5 20.4 20.1
12. 4. Benefits of Soil Compaction
The benefits of compaction are:
1. Increased soil strength
2. Increased load-bearing capacity.
3. Reduction in settlement (lower compressibility).
4. Reduction in the flow of water (water seepage).
5. Reduction in soil swelling (expansion) and collapse (soil
contraction).
6. Increased soil stability.
7. Reduction in frost damage.
Improper compaction can lead to:
1. Structural distress from excessive total and differential settlements.
2. Cracking of pavements, floors, and basements.
3. Structural damage to buried structures, water and sewer pipes, and
utility conduits.
4. Soil erosion.