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E-raamat: Design Of Pile Foundations In Liquefiable Soils

(Univ Of Cambridge, Uk), (Univ Of Dundee, Uk), (Univ Of Cambridge, Uk)
  • Formaat: 232 pages
  • Ilmumisaeg: 15-Sep-2009
  • Kirjastus: Imperial College Press
  • Keel: eng
  • ISBN-13: 9781908978493
  • Formaat - PDF+DRM
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  • Raamatukogudele
  • Formaat: 232 pages
  • Ilmumisaeg: 15-Sep-2009
  • Kirjastus: Imperial College Press
  • Keel: eng
  • ISBN-13: 9781908978493

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Pile foundations are the most common form of deep foundations that are used both onshore and offshore to transfer large superstructural loads into competent soil strata. This book provides many case histories of failure of pile foundations due to earthquake loading and soil liquefaction. Based on the observed case histories, the possible mechanisms of failure of the pile foundations are postulated. The book also deals with the additional loading attracted by piles in liquefiable soils due to lateral spreading of sloping ground. Recent research at Cambridge forms the backbone of this book with the design methodologies being developed directly based on quantified centrifuge test results and numerical analysis.
The book provides designers and practicing civil engineers with a sound knowledge of pile behaviour in liquefiable soils and easy-to-use methods to design pile foundations in seismic regions. For graduate students and researchers, it brings together the latest research findings on pile foundations in a way that is relevant to geotechnical practice.

Pile foundations are the most common form of deep foundations that used both onshore and offshore to transfer large superstructure loads into competent soil strata. This book provides many case histories of failure of pile foundations due to earthquake loading and soil liquefaction. Based on the observed case histories, the possible mechanisms of failure of the pile foundations are postulated. The book also deals with the additional loading attracted by piles in liquefiable soils due to lateral spreading of sloping ground. Recent research at Cambridge forms the backbone of this book with the design methodologies being developed directly based on quantified centrifuge test results and numerical analysis.The book provides designers and practicing civil engineers with a sound knowledge of pile behaviour in liquefiable soils and easy-to-use methods to design pile foundations in seismic regions. For graduate students and researchers, it brings together the latest research findings on pile foundations in a way that is relevant to geotechnical practice.
Foreword vii
Preface ix
Performance of Pile Foundations
1(38)
Introduction
1(7)
Axial capacity of a single pile
3(2)
Pile capacity based on CPT testing
5(1)
Pile base capacity
6(1)
Shaft friction
7(1)
Performance of Pile Foundations During Earthquake Loading
8(3)
Soil Liquefaction and Lateral Spreading
11(1)
Performance of Pile Foundations in Past Earthquakes
12(19)
Showa bridge failure
14(4)
Niigata Family Court House building
18(3)
The Landing Bridge performance
21(6)
The Harbour Master's Tower at Kandla Port
27(4)
Modes of Pile Failure in Liquefiable Soils
31(7)
Failure mechanisms for single piles
31(4)
Failure mechanisms for pile groups
35(3)
Summary
38(1)
Inertial and Kinematic Loading
39(41)
Pile Behaviour Under Earthquake Loading
39(4)
Inertial loading
39(2)
Kinematic loading in level ground
41(2)
Kinematic loading in sloping ground
43(1)
Analysis of Laterally Loaded Piles Under Static Conditions
43(5)
Simplified soil profiles
44(2)
Simplified analysis procedures for piles under static loading
46(2)
Analysis of Laterally Loaded Piles Under Earthquake Loading
48(3)
Variation in the action of inertial and kinematic loads with depth
48(1)
Effective lengths of piles
49(1)
Pile flexibility
50(1)
Kinematic Response in Level Ground
51(3)
Kinematic Loading in Laterally Spreading Soil
54(2)
Inertial Response
56(2)
Relative stiffness of pile-soil system
56(1)
Damping coefficients
57(1)
p-y Analysis of Piles
58(9)
Static lateral loading
58(4)
Cyclic lateral loading
62(1)
p-y analysis under earthquake loading - level ground
63(1)
p-y analysis under earthquake loading - sloping ground
64(3)
Limit Equilibrium Analysis of Piles Subjected to Earthquake Loading
67(9)
Limit equilibrium of piles in laterally spreading soils
68(2)
Limit equilibrium analysis in the presence of nonliquefied crust
70(1)
Stiff clay as a nonliquefiable layer
70(4)
Dense sand as a nonliquefiable layer
74(2)
Provisions in Eurocode 8
76(3)
Combination rules
77(1)
Pile head fixity coefficients
77(1)
Kinematic loading
78(1)
Summary
79(1)
Accounting for Axial Loading in Level Ground
80(36)
Liquefaction as a Foundation Hazard
80(4)
Liquefaction
80(2)
Determination of liquefaction susceptibility
82(2)
Influence of Axial Loading on Pile Failure
84(1)
Axial Load Transfer Due to Liquefaction
85(3)
Liquefaction-induced (co-seismic)
85(3)
Downdrag (post-earthquake)
88(1)
Pile Settlement
88(7)
Liquefaction-induced (co-seismic)
88(4)
Downdrag (post-earthquake)
92(3)
Guidelines for Designing Against Bearing Failure
95(3)
Instability of Single Piles and Pile Groups
98(10)
Rock-socketed piles
98(7)
Floating piles
105(3)
Bearing vs. Buckling Failure
108(7)
Methodology
108(2)
Sample analysis
110(1)
Ultimate axial limiting states for piled foundations
111(3)
Use of limiting states in pile sizing
114(1)
Summary
115(1)
Lateral Spreading of Sloping Ground
116(22)
Liquefaction-induced Lateral Spreading
116(4)
Introduction
116(4)
Simple Methods to Estimate the Extent of Lateral Spreading
120(4)
Effects of Lateral Spreading on Pile Foundations
124(12)
Presence of nonliquefiable crust
125(1)
Lateral pressures generated on piles and pile caps
126(8)
Current codal provisions
134(1)
Specifications for Highway Bridges (JRA, 2002)
134(1)
Design Standard for Railway Facilities (RTRI 1999)
134(1)
Recommendations for Design of Building Foundations (AIJ 2001)
135(1)
Recent experimental data vs codal provisions
135(1)
Recommendations on Estimation of Lateral Loads for Pile Design
136(2)
Axial Loading on Piles in Laterally Spreading Ground
138(27)
Introduction
138(1)
Phasing of Loads
138(5)
Inertial and kinematic loads
139(3)
Presence of axial loads
142(1)
Peak Lateral Response of Piled Foundations
143(4)
Residual Lateral Response of Piled Foundations
147(10)
Single piles
147(2)
Pile groups (including axial load)
149(5)
Comparison of single pile and group pile behaviour
154(1)
Insight into effects of axial load on group response
155(2)
Validation of Effects of Axial Pile Load
157(3)
Recommendations for Designing Piles in Laterally Spreading Ground
160(5)
Design Examples
165(38)
Introduction
165(1)
Design of Piles Under Static Loading
165(6)
Example 1: Preliminary design of piles under static loading
166(1)
End bearing
166(1)
Shaft resistance
167(1)
Example 2: Preliminary design of piles using CPT data
168(1)
End bearing
168(1)
Shaft resistance
168(3)
Inertial and Kinematic Loading on Piles in Level Ground
171(11)
Soil stiffness and natural frequency
172(3)
Effective length and flexibility of the pile
175(1)
Effective length of the pile
175(1)
Flexibility of the pile
176(1)
Inertial loading on the pile
177(3)
Kinematic interaction
180(2)
Design of Piles in Level Liquefiable Ground
182(10)
Determination of liquefaction potential from CPT data
182(5)
Pile sizing based on liquefaction considerations
187(4)
Inertial response in level liquefied ground
191(1)
Design of Piles in Sloping Liquefiable Ground
192(8)
Pile group in two-layer soil profile subject to lateral spreading
192(4)
Method 1
196(1)
Method 2
196(1)
Method 3
196(3)
Pile group in three-layer soil profile subject to lateral spreading
199(1)
Summary of Inclusive Design Procedure
200(3)
References 203(8)
Index 211