Mata kuliah : S0892 – Ground Improvement Method
Tahun
: 2010
Case Study
Session 12 - 13
COURSE 5
Content:
• Case Study 1 – Jordan Hall of Science
University of Notre Dame
• Case Study 2 – Commercial Complex Kuala
Lumpur City
• Case Study 3 – Interchange at Kampung Pasir
Dalam Malaysia
• Case Study 4 – Road Construction Thailand
Bina Nusantara
CASE STUDY 1
Bina Nusantara
LOCATION
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
PROJECT REQUIREMENTS
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Bina Nusantara
Four-story building with slab on-grade and small basement area for
mechanical
Structural concrete and steel framing with concrete masonry units
and brick facade/cast stone detailing
Column loads: 800 to 1,000 kips
Building footprint of 75,000 sq ft.
Two 250 – seat lecture halls
Greenhouse
Teaching labs
Office Space
Roof top observatory
Existing utility tunnel
CASE STUDY 1
GENERALIZED SUBSURFACE PROFILE
Bina Nusantara
CASE STUDY 1
FOUNDATION ALTERNATIVES
• Spread Foundation Scheme
– 2 ksf
– 1 to 2 in. settlement
• Deep Foundation Scheme (driven or drilled elements)
• Ground Improvement Technique
– Vibro-compaction and use spread foundations designed for 10
ksf with 1/2 in. settlement
GROUND IMPROVEMENT WAS CHOSEN
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
Bina Nusantara
CASE STUDY 1
TREATMENT RESULTS
BEFORE
Bina Nusantara
AFTER
CASE STUDY 2
Bina Nusantara
LOCATION
CASE STUDY 2
Soil Condition
• The subsoil comprised of loose silty sand deposits and ex-mining
soils with SPT values in the range of 5 blows/ft to 12 blows/ft.
• Underlying this loose soil layers, karstic limestone formation was
found with extremely varying rock-head levels ranging between 3m
and 15m below existing ground level. Overhanging boulders and
pinnacles are common; hence the founding level of the bedrock
formation was unpredictable.
• The ground water table was found to be at about 1m to 2m below
existing ground level.
Bina Nusantara
CASE STUDY 2
Bina Nusantara
CASE STUDY 2
Bina Nusantara
EXECUTION OF DSM WORK
CASE STUDY 2
RESULT
• Excavation works proceeded upon
completion of DSM installation works and
subsequent curing period of only 14days.
• Bedrock underneath the DSM columns
was excavated using the hydraulic
breaker and blasting works.
• The installed DSM columns were able to
withstand the high vibration induced by
rock excavation works.
• As part of quality control procedure, cores
from DSM columns were extracted and
tested in a laboratory for UCS. The test
results indicated an UCS in the range of
1MPa to 3MPa.
• In addition, wall movement was
monitored during excavation works,
which showed a maximum horizontal
movement of about 30mm to 40mm.
Bina Nusantara
CASE STUDY 3
Bina Nusantara
LAYOUT
CASE STUDY 3
Bina Nusantara
CASE STUDY 3
STONE COLUMN
Bina Nusantara
CASE STUDY 3
Bina Nusantara
CASE STUDY 3
Bina Nusantara
CASE STUDY 4
Location : South Thailand
Purpose : Road Construction
Ground Improvement Type : Jet Grouting
Type of Nature Soil : Soft Clay
Bina Nusantara
CASE STUDY 4
Bina Nusantara
CASE STUDY 4
TYPICAL CROSS SECTION
Bina Nusantara
CASE STUDY 4
CONSTRUCTION PROCESS
Bina Nusantara
CASE STUDY 4
Bina Nusantara
CASE STUDY 4
Unconfined compressive strength test results of core
samples from the jet grouted piles exceed the design
target value of 600 kPa.
Bina Nusantara