Ground Improvement 2

Front 1

3 ways of dealing with poor soil/ improving soil?.

Back 1

.Deep foundations
Removal and replacement
Consolidating (improve properties in place)

Front 2

.Method of ground improvement only practicable above water table and in shallow depths

Back 2

.Removal and replacement

Front 3

.Soil improvement approaches

Back 3

.Densification- consolidation, compaction
Adding a foreign material- to fill voids and reinforce the soil

Front 4

.4 methods of ground improvement via densification (opposed to adding foreign material) in the form of consolidation (other densification method is compaction)

Back 4

.preloading/precompression
pre loading with vertical drains
Vacuum preloading
Electro-osmosis consolidation

Front 5

.4 methods of ground improvement densification by compaction

Back 5

.Shallow compaction
Dynamic/Impact compaction (BOOM from crane)
Depth vibrator compaction / vibroflotation
Vibro-replacement; stone columns

Front 6

.Main disadvantage of precompression/preloading?

Back 6

.surcharge ust stay in place for very long time! thus delaying construction

Front 7

.The main advantage of precompression/preloading with vertical drains?

Back 7

.Consolidation reduced to couple of months instead of years!

Front 8

.... compaction is effective
if silt content is less than 12-15% and
clay is less than 3%

Back 8

.Vibratory probe

Front 9

.... extends the range of soils that can be
improved by vibratory techniques to include cohesive soils.

Back 9

.Vibratory replacement

Front 10

.... is a PVC or metal pipe
in which rubber sleeves cover holes that
are drilled in the pipe at specific intervals

Back 10

.manchette grouting tube

Front 11

.... A two-phase internal fluid system with a coaxial air-jet

Back 11

.double fluid jet grouting

Front 12

.... SOIL NAILING

Back 12

.SOIL NAILING

Front 13

....can be used to wrap compacted layers of soil ultimately
producing a stable composite structure

Back 13

.Geogrids or geotextiles

Front 14

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Back 14

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