Back Matter for Theory Manual for the Load Displacement Compatibility Method (LDC) for Design of Column-Supported Embankments

Adapted Terzaghi (AT) method

8, 10–11

Approximate concentric arches (ACA) model

13, 16

Approximate Hewlett and Randolph (AHR) model

13–14, 14t–15t

Arching mobilization

12–16

bilinear adapted Terzaghi (BAT) method for

12

SGRC model for

12–16, 13f, 14t–15t, 15f

Area replacement ratio

2

Center-to-center spacings between columns

2, 2f

Clays

30–32

consolidation strain

30

stress–strain relationship of

30–32

time rate of consolidation

30–32

Columns and pile caps

32–33

one-dimensional compression of

32–33

Poisson's ratio

33

Young's modulus

32–33

Column-supported embankments (CSEs)

1–3, 8, 32

center-to-center spacings between columns

2, 2f

construction

2, 2f

critical height

2–3

cross section of

1, 1f

differential settlement

3

load transfer mechanisms in

2–3, 5–8

overview

1–2

rectangular column arrays

2, 2f

triangular column arrays

2, 2f

vertical load transfer to columns

2

Compressible soils

1

Concentric arches (CA) model

13–14, 14t–15t

Consolidation strain, clays

30

Critical height

2–3

CSEs

. See column-supported embankments

Differential settlement

3

GeogridBridge 3.0 (GGB3)

7–8, 25–26, 32

Ground Modification Methods Reference Manual, 5

Initial and final stresses in soils

29–30

Load displacement compatibility (LDC)

5–8

drag force

25–26

in GeogridBridge 3.0 (GGB3)

7–8

load transfer along length of column

7f

load transfer mechanisms

5–26, 6f

load transfer through tensioned geosynthetic

5–6, 16–25

negative skin friction

5–6

parabolic method

derivation of

17–25

general form, derivation of

18–21

overview of

16–17

square/rectangular arrays, derivation for

22–25, 22f, 24f

triangular arrays, derivation for

21–22

postconstruction surface loading

7

soil arching in embankment

5–6, 8–16

column-supported embankment

8

incremental arching derivation

9–12, 9f

mobilization of

12–16

three-dimensional (3D) column–supported embankments

8

two-dimensional (2D) model for

8, 9f

stress reduction ratio

7

Load transfer platform (LTP)

16

LTP

. See load transfer platform

MCS

. See Monte Carlo simulation

Monte Carlo simulation (MCS)

35

convergence of P(f) based on number of iterations performed

37f

geotechnical application of

36–37

short-term stability of vertical cut in clay (example)

36f

Negative skin friction

25

OCM

. See overconsolidation margin

OCR

. See overconsolidation ratio

Overconsolidation margin (OCM)

29–30

Overconsolidation ratio (OCR)

29–30

Parabolic method, LDC

derivation of

17–25

general form

18–21

square/rectangular arrays

22–25, 22f, 24f

triangular arrays

21–22

overview of

16–17

Poisson's ratio for sands

32

Prefabricated vertical drains (PVDs)

1

PVDs

. See prefabricated vertical drains

Rectangular column arrays

2, 2f

Sands

32

Poisson's ratio for

32

Young's modulus for

32

Simplified ground reaction curve (SGRC) model

12–16, 13f, 14t–15t, 15f

Soil arching in embankment

5–6, 8–16

column-supported embankment

8

incremental arching derivation

9–12, 9f

mobilization of

12–16

bilinear adapted Terzaghi (BAT) method for

12

SGRC model for

12–16, 13f, 14t–15t, 15f

three-dimensional (3D) column–supported embankments

8

two-dimensional (2D) model for

8, 9f

SRR

. See stress reduction ratio

Stresses (initial and final) in soils

29–30

Stress reduction ratio (SRR)

7

Stress–strain relationship of clays

30–32

Surcharge fills

1

Terminal arching

12

Three-dimensional (3D) column–supported embankments

8

Time rate of consolidation, clays

30–32

Triangular column arrays

2, 2f

Young's modulus for sands

32