Volume 6 – Geotechnical Manual, Site Investigation and Engineering ...

Chapter 4 SOIL SETTLEMENT
Table of Contents
Table of Contents .................................................................................................................... 4-i
List of Tables ......................................................................................................................... 4-ii
List of Figures ........................................................................................................................ 4-ii
4 SOIL SETTLEMENT .............................................................................................................. 4-1
4.1 GENERAL CONCEPT .................................................................................................... 4-1
4.1.1 Immediate (Distortion) Settlement ................................................................ 4-1
4.1.2 Primary Consolidation ................................................................................... 4-2
4.1.3 Secondary Compression ................................................................................ 4-2
4.2 SETTLEMENT ON GRANULAR SOILS .............................................................. 4-2
4.3 ESTIMATION OF PRIMARY CONSOLIDATION IN COHESIVE SOIL .................................... 4-3
4.3.1 Normally Consolidated Soils .......................................................................... 4-5
4.3.2 Overconsolidated (Preconsolidated) Soils ....................................................... 4-5
4.3.3 Underconsolidated Soils ................................................................................ 4-6
4.4 RATE OF CONSOLIDATION .......................................................................................... 4-7
4.5 SECONDARY SETTLEMENT OF COHESIVE SOIL ............................................................. 4-9
4.6 DIFFERENTIAL SETTLEMENT ..................................................................................... 4-10
4.7 PLATE LOADING TEST FOR SETTLEMENT ESTIMATION ............................................... 4-12
4.8 SETTLEMENT OF RAFT/MAT FOUNDATIONS ............................................................... 4-12
REFERENCES ....................................................................................................................... 4-14
March 2009 4-i