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Soil Improvement: Prefabricated Vertical Drain Techniques  (eBook)

EBK: SOIL IMPROVEMENT: PREFABR ICATED VERTICAL DRAIN TECHQS

Environmental Science

Mathematics & Science

Gt Product Group

Binding Format

Marketing Imprint Name

B2B GT

Imprint Name

B2B & B2C

Written by authors with years of research and project experience in soil improvement using prefabricated vertical drains, this book illustrates both theoretical and practical aspects with frequent references to several land reclamation and soil improvement projects in Asia. Consolidation theories and numerical methods involving vertical drains are presented, and selection of appropriate design parameters for soil improvement using prefabricated vertical drains is discussed. Projects implementation and monitoring of performance are described. Several case studies are also presented.

LIBRARY Adult

COLFR

COLSO

COLJR

COLSR

Duration

Duration Unit Of Measure

Transaction Type

Preface

CHAPTER 1. INTRODUCTION.  

CHAPTER  2. THEORIES, COMPUTATIONS AND DESIGN PROCEDURES INVOLVING VERTICAL DRAINS
2.1 Introduction.  2.2 One-dimensional Consolidation Theory: Equations and charts of one-dimensional consolidation. Implicit finite difference solution of one-dimensional consolidation.  2.3 Consolidation due to Combined Vertical and Radial Flow: Barron''s solution and carillo''s equation. Design charts for combined vertical and radial drainage. Accounting for smear effect by reducing ch. Spreadsheet template with automatic iteration. Implicit finite difference solution for combined vertical and radial flow.  2.4 Approximately Analysis Involving Staged Fill Placement and Submergence: Program VdrainSt and excel spreadsheet template. Example VDrainSt output. Computation procedure in program VDrainSt. Limitations of program VDrainSt.  2.5 Chek Lap Kok Test Embarkments: The vertical band drain quadrants of the Chek Lap Kok test embarkment. Comparing VDrainSt computations with measured settlements. Sensitivity studies.  2.6 General Considerations with respect to Vertical Drains: Some practical considerations. Well resistance.

CHAPTER 3. GEOTECHNICAL PRPOERTIES OF SOFT SOIL AND THEIR DETERMINATION
3.1 Introduction.  3.2 Laboratory Methods: Oedometer methods. Rowe cell test. NTU consolidometer. The characteristics of the consolidation and permeability parameters.  3.3 In-situ Methods: Piezometric cone (CPTU) dissipation tests. Flat dilatometer (DMT) dissipation tests. Self-boring pressuremeter (SBPT) holding test. BAT permeability test. Comparisions of different methods.  3.4 Properties of the Soil in Smeared Zone: Laboratory model tests. Field tests.  3.5 Concluding Remarks.

CHAPTER 4. PROPERTIES OF PREFABRICATED VERTICAL DRAIN AND QUALITY CONTROL TESTS
4.1 Introduction.  4.2 Terminology: Permittivity of filter. Transmissivity of filter. Discharge capacity of drain. Discharge factor. Apparent opening size (AOS). D85 of soils.  4.3 Properties of PVD: Discharge capacity. Requirement of discharge capacity. Properties of filter. Tensile strengths.  4.4 Factors Controlling PVD Selection.  4.5 Quality Control Tests: Discharge capacity tests. Tensile strength measurements. Cross-plane permeability of filter. AOS of filter.  4.6 Specific Aspects: Smear effect. Standardization.  

CHAPTER 5. IMPLEMENTATION OF PREFABRICATED VERTICAL DRAIN PROJECT
5.1 Selection of Vertical Drain.  5.2 Planning and Selection of Vertical Drain Rigs.  5.3 Difficulties in Installation: Top hard crust at seabed. Intermediate hard crust at intermediate depth. Hard or dense layer at deep-seated formation. Installation through ultrasoft clay.  5.4 Types of Mandrel.  5.5 Types of Anchor.  5.6 Installation.  5.7 Quality Control of Vertical Drains.

CHAPTER 6. MONITORING OF PERFORMANCE
6.1 Types of Geotechnical Instruments: Deep reference point. Settelement plate. Liquid settlement gauge. Deep settlement gauge. Multilevel settlement gauge. Earth pressure cell. Piezometers. Casagrande open type piezometer. Water stand pipe. Inclinometer. Automatic monitoring instruments.

CHAPTER 7. PERFORMANCE ASSESSMENT
7.1 Analyzing of Instruments Monitoring Data:  Settlement gauges. Piezometers.  7.2 Interpretation from in-situ Tests: Cone penetration test (CPT). Field vane shear test (FVT). Dilatometer test (DMT).  Self-boring pressuremeter test.  7.3 Analyzing of Laboratory Data.  7.4 Back Analysis: Back analysis of compression parameters. Back analysis of coefficient of consolidation.  7.5 Factors Affecting Assessment of Degree of Consolidation: Assessment using settlement monitoring data. Assessment using piezometer data. Discrepancy between degree of consolidation assessed from pore pressure and settlement.

CHAPTER 8. CASE STUDIES
8.1 Changi Airport Runway II Project in Singapore: Soil properties. Instrumentation. In-situ testing. Improvement of soft clay with prefabricated vertical drain and preloading.  8.2 Changi East Reclamation projects in Singapore: Site  conditions and geological profile. Soil properties. Phase 1A. Phase 1B. Phase 1C. Area A (North). Area A (South).  8.3 Reclamation at Chek Lap Kok in Hong Kong.  8.4 Tianjin East Pier Project in China.  8.5 Oil Storage Station Project in China: Site conditions. Soil improvement works. Results. Concluding Remarks.  

References
Index

Soil Improvement: Prefabricated Vertical Drain Techniques (eBook).css-1p8rvzy{position:absolute;padding-left:8px;}

Soil Improvement: Prefabricated Vertical Drain Techniques (eBook)