6: Rapid impact compaction is used in the project below. Read the details, then 1. investigate whether rapid impact compaction was a good selection. 2. check if the proposed depth of improvement is achievable with rapid impact compaction. 3. show if the applied energy per each drop point or primary pass was sufficient to densify the geomaterial. Case history- Housing Project established in 2013 Location Dubai, UAE Geomaterial (0-6 meters) Depth of groundwater table Depth of improvement Compaction pattern Number of passes Hammer weight Average height of drop Average Number of blows by one pass at each drop location • Medium dense silty sand. ● SPT N value (11-16) • In some areas of the project site, a loose to very loose fine to medium-grained sand layer is encountered at the depth ranging from approximately 1.0 m to 4.5 m below the ground level with SPT N value (4-6). 1.5 m 4 m Primary 6*6 m and secondary each 3 m. 3 9 tons 1.15 m 18 مطبع

Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
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Chapter5: Soil Improvement And Ground Modification
Section: Chapter Questions
Problem 5.13P
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o: Rapid impact compaction is used in the project below. Read the details, then
1. investigate whether rapid impact compaction was a good selection.
2. check if the proposed depth of improvement is achievable with rapid impact compaction.
3. show if the applied energy per each drop point or primary pass was sufficient to densify the
geomaterial.
Case history- Housing Project established in 2013
Location
Dubai, UAE
Geomaterial (0-6 meters)
• Medium dense silty sand.
SPT N value (11-16)
In some areas of the project site, a loose to very loose
fine to medium-grained sand layer is encountered at
the depth ranging from approximately 1.0 m to 4.5 m
below the ground level with SPT N value (4-6).
O
Depth of groundwater table 1.5 m
Depth of improvement
4 m
Primary 6*6 m and secondary each 3 m.
Compaction pattern
Number of passes
Hammer weight
Average height of drop
Average Number of blows
by one pass at each drop
location
18
3
9 tons
1.15 m
subo
Transcribed Image Text:o: Rapid impact compaction is used in the project below. Read the details, then 1. investigate whether rapid impact compaction was a good selection. 2. check if the proposed depth of improvement is achievable with rapid impact compaction. 3. show if the applied energy per each drop point or primary pass was sufficient to densify the geomaterial. Case history- Housing Project established in 2013 Location Dubai, UAE Geomaterial (0-6 meters) • Medium dense silty sand. SPT N value (11-16) In some areas of the project site, a loose to very loose fine to medium-grained sand layer is encountered at the depth ranging from approximately 1.0 m to 4.5 m below the ground level with SPT N value (4-6). O Depth of groundwater table 1.5 m Depth of improvement 4 m Primary 6*6 m and secondary each 3 m. Compaction pattern Number of passes Hammer weight Average height of drop Average Number of blows by one pass at each drop location 18 3 9 tons 1.15 m subo
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