July/August 2023 - 19

Early phases of construction provided the design team with an understanding of the
geotechnical conditions, soil anchor installation challenges, construction
costs/productivity and validated the design approach, which allowed the team to
incorporate lessons learned in subsequent construction contracts.
If monitoring showed that the predicted results were not
being achieved, several contingency measures were
available, including reducing tension in overstressed anchors
and adding anchors. Monitoring results were retrieved daily
via satellite upload and web-based plotting. Real-time
monitoring was vital to determine when anchors required
retensioning, which occurred several times for the initial,
upper row of anchors until there was sufficient support to
stabilize the slide. No additional anchors were required.
Monitoring has shown the slide response being as
predicted and movement above the pile wall is also below
detection limits. There is some localized, shallow movement
and anchor load reduction associated with compression of
tension cracks on the extreme eastern edge of the slide, which
Top-down construction
will be monitored and addressed if required. Displacement
below the tangent pile wall continues to occur as anticipated
in the design. Currently, anchor and tie-back loads are stable
or decreasing very slowly.
Construction
Works were installed top-down starting at the upper row of
soil anchors and defined time allowances were specified in
the construction contracts for each stage to limit ground
movements. The stabilization work was completed under
three construction contracts. In early 2017, 30 soil anchors
were installed, an additional 44 soil anchors installed in 2018,
and the remaining 202 soil anchors and the tied-back pile
wall were completed from 2019 to 2021.
DEEP FOUNDATIONS * JULY/AUG 2023 * 19

July/August 2023

Table of Contents for the Digital Edition of July/August 2023

TOC
July/August 2023 - Intro
July/August 2023 - 1
July/August 2023 - 2
July/August 2023 - TOC
July/August 2023 - 4
July/August 2023 - 5
July/August 2023 - 6
July/August 2023 - 7
July/August 2023 - 8
July/August 2023 - 9
July/August 2023 - 10
July/August 2023 - 11
July/August 2023 - 12
July/August 2023 - 13
July/August 2023 - 14
July/August 2023 - 15
July/August 2023 - 16
July/August 2023 - 17
July/August 2023 - 18
July/August 2023 - 19
July/August 2023 - 20
July/August 2023 - 21
July/August 2023 - 22
July/August 2023 - 23
July/August 2023 - 24
July/August 2023 - 25
July/August 2023 - 26
July/August 2023 - 27
July/August 2023 - 28
July/August 2023 - 29
July/August 2023 - 30
July/August 2023 - 31
July/August 2023 - 32
July/August 2023 - 33
July/August 2023 - 34
July/August 2023 - 35
July/August 2023 - 36
July/August 2023 - 37
July/August 2023 - 38
July/August 2023 - 39
July/August 2023 - 40
July/August 2023 - 41
July/August 2023 - 42
July/August 2023 - 43
July/August 2023 - 44
July/August 2023 - 45
July/August 2023 - 46
July/August 2023 - 47
July/August 2023 - 48
July/August 2023 - 49
July/August 2023 - 50
July/August 2023 - 51
July/August 2023 - 52
July/August 2023 - 53
July/August 2023 - 54
July/August 2023 - 55
July/August 2023 - 56
July/August 2023 - 57
July/August 2023 - 58
July/August 2023 - 59
July/August 2023 - 60
July/August 2023 - 61
July/August 2023 - 62
July/August 2023 - 63
July/August 2023 - 64
July/August 2023 - 65
July/August 2023 - 66
July/August 2023 - 67
July/August 2023 - 68
July/August 2023 - 69
July/August 2023 - 70
July/August 2023 - 71
July/August 2023 - 72
July/August 2023 - 73
July/August 2023 - 74
July/August 2023 - 75
July/August 2023 - 76
July/August 2023 - 77
July/August 2023 - 78
July/August 2023 - 79
July/August 2023 - 80
July/August 2023 - 81
July/August 2023 - 82
July/August 2023 - 83
July/August 2023 - 84
July/August 2023 - 85
July/August 2023 - 86
July/August 2023 - 87
July/August 2023 - 88
July/August 2023 - 89
July/August 2023 - 90
July/August 2023 - 91
July/August 2023 - 92
July/August 2023 - 93
July/August 2023 - 94
July/August 2023 - 95
July/August 2023 - 96
July/August 2023 - 97
July/August 2023 - 98
July/August 2023 - 99
July/August 2023 - 100
July/August 2023 - 101
July/August 2023 - 102
July/August 2023 - 103
July/August 2023 - 104
July/August 2023 - 105
July/August 2023 - 106
July/August 2023 - 107
July/August 2023 - 108
July/August 2023 - 109
July/August 2023 - 110
July/August 2023 - 111
July/August 2023 - 112
July/August 2023 - 113
July/August 2023 - 114
July/August 2023 - 115
July/August 2023 - 116
July/August 2023 - 117
July/August 2023 - 118
July/August 2023 - 119
July/August 2023 - 120
July/August 2023 - 121
July/August 2023 - 122
July/August 2023 - 123
July/August 2023 - 124
https://www.nxtbook.com/dfi/DEEP-FOUNDATIONS/november-december-2024
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