An embankment will be constructed on very soft soil as shown in Figure Q1(b). The details pertaining to a project is shown in Table 1. The selected PVDs have the cross sectional dimensions of 95 mm in length and 4 mm in thickness. The smear zone is assume to be 1.5 times the equivalent diameter of PVD. Assume that the PVD will be installed in triangular pattern. (i) (ii) Determine the average consolidation ratio, Uvr after 9 months of preloading by considering the smear effect and well resistance effect. Predict the settlement after 9 months of preloading.
An embankment will be constructed on very soft soil as shown in Figure Q1(b). The details pertaining to a project is shown in Table 1. The selected PVDs have the cross sectional dimensions of 95 mm in length and 4 mm in thickness. The smear zone is assume to be 1.5 times the equivalent diameter of PVD. Assume that the PVD will be installed in triangular pattern. (i) (ii) Determine the average consolidation ratio, Uvr after 9 months of preloading by considering the smear effect and well resistance effect. Predict the settlement after 9 months of preloading.
Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
Publisher:Braja M. Das
Chapter16: Soil Improvement And Ground Modification
Section: Chapter Questions
Problem 16.12P
Related questions
Question
![10 m
Item
Surcharge
Soft soil
layer
PVD
properties
1m
Surcharge, Ao = 30 kN/m²
Soft Soil layer
PVD
Impervious rock
FIGURE Q1(b): Soil profile of soft soil improved PVD
TABLE 1: Data for PVD project
Parameters
Δσ
Saturated unit weight, Ysat
Compression index, Ce
Coefficient of vertical consolidation, Cv
Coefficient of horizontal consolidation, C₁
Initial void ratio, e。
Vertical Permeability in undisturbed zone, kv
Horizontal Permeability in undisturbed zone, k₁
Horizontal Permeability in smear zone, ks
Discharge capacity, Qc
GWT
Value
30 kN/m²
16 kN/m³
0.7
0.65 m²/year
1.3 m²/year
1.5
5 x 10 m/s
-8
1 x 108 m/s
3.3x 10 m/s
1 x 10 m³/s](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9248862e-1420-4bdb-a908-601928368569%2F8c861b02-2218-4da0-bed0-f296c70a9810%2Fx3p5kue_processed.png&w=3840&q=75)
Transcribed Image Text:10 m
Item
Surcharge
Soft soil
layer
PVD
properties
1m
Surcharge, Ao = 30 kN/m²
Soft Soil layer
PVD
Impervious rock
FIGURE Q1(b): Soil profile of soft soil improved PVD
TABLE 1: Data for PVD project
Parameters
Δσ
Saturated unit weight, Ysat
Compression index, Ce
Coefficient of vertical consolidation, Cv
Coefficient of horizontal consolidation, C₁
Initial void ratio, e。
Vertical Permeability in undisturbed zone, kv
Horizontal Permeability in undisturbed zone, k₁
Horizontal Permeability in smear zone, ks
Discharge capacity, Qc
GWT
Value
30 kN/m²
16 kN/m³
0.7
0.65 m²/year
1.3 m²/year
1.5
5 x 10 m/s
-8
1 x 108 m/s
3.3x 10 m/s
1 x 10 m³/s
![(b)
An embankment will be constructed on very soft soil as shown in Figure Q1(b). The
details pertaining to a project is shown in Table 1. The selected PVDs have the cross
sectional dimensions of 95 mm in length and 4 mm in thickness. The smear zone is
assume to be 1.5 times the equivalent diameter of PVD. Assume that the PVD will be
installed in triangular pattern.
(i)
€
Determine the average consolidation ratio, Uvr after 9 months of preloading
by considering the smear effect and well resistance effect.
Predict the settlement after 9 months of preloading.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9248862e-1420-4bdb-a908-601928368569%2F8c861b02-2218-4da0-bed0-f296c70a9810%2Fyvmu2qk_processed.png&w=3840&q=75)
Transcribed Image Text:(b)
An embankment will be constructed on very soft soil as shown in Figure Q1(b). The
details pertaining to a project is shown in Table 1. The selected PVDs have the cross
sectional dimensions of 95 mm in length and 4 mm in thickness. The smear zone is
assume to be 1.5 times the equivalent diameter of PVD. Assume that the PVD will be
installed in triangular pattern.
(i)
€
Determine the average consolidation ratio, Uvr after 9 months of preloading
by considering the smear effect and well resistance effect.
Predict the settlement after 9 months of preloading.
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