Provides general requirements for the execution, testing, supervision, monitoring and installation methods of prefabricated vertical drain projects. It also includes information on design considerations, and practical and design aspects of vertical drainage.
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Notation
1.5 Information required before the execution of the work
1.5.1 General
1.5.2 General information required
1.5.3 Information on site conditions
1.5.3.1 General
1.5.3.2 Geotechnical investigations
1.5.4 Information for the loading operation
1.5.5 Reporting procedures
2 Materials and product
2.1 Testing standards for specific material properties
2.2 Raw materials of prefabricated drains
2.3 Flat drains
2.3.1 Shape and structure of flat drain
2.3.2 Measurements
2.3.3 Durability
2.3.4 Tensile strength and elongation
2.3.5 Discharge capacity
2.3.6 Filter of flat drains
2.3.7 Tensile strength per unit width of filter
2.3.8 Permittivity/permeability of filter
2.3.9 Pore size of filter
2.3.10 Quality control
2.3.11 Delivery quality assurance
2.4 Prefabricated round drain
2.4.1 Shape and structure of round drain
2.4.2 Measurements
2.4.3 Durability
2.4.4 Tensile strength and elongation
2.4.5 Discharge capacity and filtration characteristics
2.4.6 Filter of round drain
2.4.7 Tensile strength per unit width of filter
2.4.8 Permittivity/permeability of filter
2.4.9 Pore size of filter
2.4.10 Quality control
3 Design considerations
3.1 General
3.2 Design philosophy
3.3 Field trials
4 Execution
4.1 Method statement
4.2 Preparation of the site
4.3 Drain installation
4.4 Special aspects
5 Supervision, monitoring and records
5.1 Supervision
5.2 Monitoring
5.3 Records
5.3.1 Records during construction
5.3.2 Records during the preload period
5.3.3 Records at the completion of the work
6 Special requirements
6.1 General
6.2 Safety
6.3 Environmental protection
6.4 Impact on adjacent structures
Appendix A
A1 Introduction
A2 Fields of application
A3 Execution of vertical drainage
A4 Drain types
A4.1 Flat drains
A4.1.1 General
A4.1.2 Types
A4.1.3 Methods of installation
A4.1.4 Precautions for the drain installation
A4.1.5 Factors influencing the flat drain efficiency
A4.1.5.1 Discharge capacity
A4.1.6 Drainage blanket
A4.1.7 Determination of flat drain discharge capacity
A4.1.7.1 Discharge capacity of straight flat drains
A4.1.7.2 Discharge capacity of buckled flat drain
A4.2 Prefabricated round drains
A4.2.1 Type of drains
A4.2.2 Method of installation
A4.2.3 Factors influencing drain efficiency
A4.2.4 Other fields of application
A5 Drainage blanket and working platform
A6 Loading
A7 Monitoring
Appendix B
B1 General
B2 Design process and philosophy
B3 Investigations for vertical drainage
B3.1 General
B3.2 Laboratory investigations
B3.3 Field investigations
B4 Aspects of design
B4.1 Settlement
B4.1.1 Total settlement
B4.1.2 Rate of consolidation settlement with vertical drainage
B4.1.2.1 Design assumptions
B4.1.2.2 Method of analysis
B4.1.3 Safety factors for prefabricated flat drains
B4.1.4 Estimation of drain spacing using design charts
B4.2 Other design aspects
B4.2.1 Filter jacket
B4.2.2 Other factors affecting design discharge
B4.3 Stability
B4.4 Cyclic loading
Appendix C
C1 Design procedure
C2 Worked-out example
Appendix D
Bibliography
Cited references in this standard
Content history
AS 8700-2011 REC:2023
DR AS 8700
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