May/June 2023 - 84

* Finally, a test pattern prior to
installation, with pre- and postinstallation
CPT testing is highly
recommended, as well as proper
installation quality control during
production that permits assessment
of properties of improved ground for
design verification and for informing
future designs.
Acknowledgements
We thank Morris Shea Bridge Company
for its cooperation and support, and for
providing the data presented in this
article.
Resistance index correlated to CPT data
Conclusion
Use of the CPT should be an intrinsic
part of the design process for rigid
inclusions, or any ground improvement
project, as they bring numerous
advantages:
* Extremely useful to properly
characterize sites
* Permits more accurate designs and
promotes reduction of excessive
conservatism
* Efficient and effective for measurement
of post-installation soil
parameters
* Facilitates assessment of liquefaction
mitigation
* Facilitates quality control of rigid
inclusions
*
Post-installation CPT testing at the
refinery showed that mitigation of
liquefaction is possible with rigid
inclusions. To this effect, the following
observations are of relevance:
* Rigid inclusions are not an appropriate
solution to liquefaction in all
cases, as it is not clear if suitable
factor of safety against liquefaction
can be obtained at sites with low
factors of safety pretreatment (less
than 0.75) or in soil with generally
higher fines content.
*
In sites where liquefaction mitigation
is the main goal of the ground
improvement, thorough numerical
analyses of the interaction of the soil
and the rigid inclusions under
seismic loading would be prudent.
It is also important to consider the
non-Ko state of the soil profile after
rigid inclusion installation and its
effect on liquefaction assessment
methods.
Mary Nodine is a geotechnical engineer
with the Structures, Geotechnical and
Hydraulic Team at the Federal Highway
Administration Resource Center. She was
formerly a consultant for 18 years with a
focus on ground improvement, deep
foundation and excavation support design,
and construction projects.
Jesús Gómez is a vice president at GEI
Consultants. Having worked in the field of
geotechnical engineering for 35 years, both
as a contractor and as a consultant in the
U.S., South America and the Caribbean,
Gómez has contributed to numerous design
and research projects that have advanced the
field in technology related to micropiles, soil
nailing, anchors and ground improvement.
84 * DEEP FOUNDATIONS * MAY/JUNE 2023

May/June 2023

Table of Contents for the Digital Edition of May/June 2023

TOC
May/June 2023 - Intro
May/June 2023 - 1
May/June 2023 - 2
May/June 2023 - TOC
May/June 2023 - 4
May/June 2023 - 5
May/June 2023 - 6
May/June 2023 - 7
May/June 2023 - 8
May/June 2023 - 9
May/June 2023 - 10
May/June 2023 - 11
May/June 2023 - 12
May/June 2023 - 13
May/June 2023 - 14
May/June 2023 - 15
May/June 2023 - 16
May/June 2023 - 17
May/June 2023 - 18
May/June 2023 - 19
May/June 2023 - 20
May/June 2023 - 21
May/June 2023 - 22
May/June 2023 - 23
May/June 2023 - 24
May/June 2023 - 25
May/June 2023 - 26
May/June 2023 - 27
May/June 2023 - 28
May/June 2023 - 29
May/June 2023 - 30
May/June 2023 - 31
May/June 2023 - 32
May/June 2023 - 33
May/June 2023 - 34
May/June 2023 - 35
May/June 2023 - 36
May/June 2023 - 37
May/June 2023 - 38
May/June 2023 - 39
May/June 2023 - 40
May/June 2023 - 41
May/June 2023 - 42
May/June 2023 - 43
May/June 2023 - 44
May/June 2023 - 45
May/June 2023 - 46
May/June 2023 - 47
May/June 2023 - 48
May/June 2023 - 49
May/June 2023 - 50
May/June 2023 - 51
May/June 2023 - 52
May/June 2023 - 53
May/June 2023 - 54
May/June 2023 - 55
May/June 2023 - 56
May/June 2023 - 57
May/June 2023 - 58
May/June 2023 - 59
May/June 2023 - 60
May/June 2023 - 61
May/June 2023 - 62
May/June 2023 - 63
May/June 2023 - 64
May/June 2023 - 65
May/June 2023 - 66
May/June 2023 - 67
May/June 2023 - 68
May/June 2023 - 69
May/June 2023 - 70
May/June 2023 - 71
May/June 2023 - 72
May/June 2023 - 73
May/June 2023 - 74
May/June 2023 - 75
May/June 2023 - 76
May/June 2023 - 77
May/June 2023 - 78
May/June 2023 - 79
May/June 2023 - 80
May/June 2023 - 81
May/June 2023 - 82
May/June 2023 - 83
May/June 2023 - 84
May/June 2023 - 85
May/June 2023 - 86
May/June 2023 - 87
May/June 2023 - 88
May/June 2023 - 89
May/June 2023 - 90
May/June 2023 - 91
May/June 2023 - 92
May/June 2023 - 93
May/June 2023 - 94
May/June 2023 - 95
May/June 2023 - 96
May/June 2023 - 97
May/June 2023 - 98
May/June 2023 - 99
May/June 2023 - 100
May/June 2023 - 101
May/June 2023 - 102
May/June 2023 - 103
May/June 2023 - 104
May/June 2023 - 105
May/June 2023 - 106
May/June 2023 - 107
May/June 2023 - 108
May/June 2023 - 109
May/June 2023 - 110
May/June 2023 - 111
May/June 2023 - 112
May/June 2023 - 113
May/June 2023 - 114
May/June 2023 - 115
May/June 2023 - 116
May/June 2023 - 117
May/June 2023 - 118
May/June 2023 - 119
May/June 2023 - 120
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/september-october-2024
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/july-august-2024
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/may-june-2024
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/march-april-2024
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/january-february-2024
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/november-december-2023
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/september-october-2023
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/july-august-2023
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/may-june-2023
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/Jan-feb-2021_nxtbook
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/july-august-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/march-april-2023
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/january-february-2023
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/november-december-2022
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/september-october-2022
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/july-august-2022
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/may-june-2022
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/march-april-2022
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/january-february-2022
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/november-december-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/sept-oct-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/july-aug-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/may-june-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/march-april-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/january-february-2021
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/november-december-2020
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/September-October-2020
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/may-june-2020
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/march-april-2020
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/january-february-2020
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/july-august-2020
https://www.nxtbookmedia.com