Foreword

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This document was prepared by Technical Committee ISO/TC 269, Railway applications, Subcommittee SC 1, Infrastructure.

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Introduction

This document is intended to be used by customers, designers, specifiers of observation and evaluation of settlement and deformation of railway subgrade and contractor.

1 Scope

This document specifies the general requirements for the observation and evaluation method of railway earthworks (substructure and foundation ground) settlement and deformation for new-built and existing railway.

2 Normative references

3 Terms and definitions

4 Technical provisions of measurement

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

5 Observation marks and components

5.1

5.2

5.3

5.4

5.5

5.6

5.7

6 Processing of observation data

6.1

6.2

6.3

6.4

7 Observation schemes for earthworks

7.1 Observation principles

7.2 Layout of observation points

7.3 Observation frequency

7.4 Protective measure of monitoring instrument

8 Prediction and evaluation

8.1 Prediction and analysis

8.2 Evaluation on settlement or deformation

8.3 Track laying evaluation criteria