TB/T 3122-2019Acoustic elements of railway sound barrier (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces TB/T 3122-2010 "Technique requirements and measurement of

acoustic elements of railway sound barrier". Compared with TB/T 3122-2010, the main

technical changes of this standard are as follows.

- MODIFY the requirements for acoustic performance, providing the requirements

for sound absorption and sound insulation performance of acoustic elements, by

frequency division (see 4.1; 4.1 of the 2010 edition);

- MODIFY the fireproof performance requirements and inspection methods (see 4.4

and 5.5; 4.4 and 5.5 of the 2010 edition);

- MODIFY the requirements and inspection methods for anti-corrosion performance

(see 4.5 and 5.6; 4.5 and 5.6 of the 2010 edition);

- ADD the requirements and inspection methods for waterproof performance of

acoustic elements of sound barriers (see 4.7 and 5.8);

- ADD the performance retention rate requirements and inspection methods, for

organic synthetic transparent panel acoustic elements (see 4.9 and 5.10).

This standard shall be under the jurisdiction of the Institute of Energy Conservation,

Environmental Protection, Labor and Sanitation of China Academy of Railway

Sciences Group Co., Ltd.

The drafting organizations of this standard. Energy Conservation, Environmental

Protection, Labor and Sanitation Research Institute of China Railway Research Institute

Group Co., Ltd., China Railway Economic Planning Research Institute Co., Ltd., China

Railway Design Group Co., Ltd.

1 Scope

This standard specifies terms and definitions, technical requirements, inspection

methods, inspection rules for acoustic elements of railway sound barriers.

This standard applies to the design, manufacture, product inspection of acoustic

elements of railway sound barriers.

2 Normative references

The following documents are essential to the application of this document. For the dated

documents, only the versions with the dates indicated are applicable to this document;

for the undated documents, only the latest version (including all the amendments) is

applicable to this standard.

GB/T 1036 Test method for coefficient of linear thermal expansion of plastics

between -30 °C and 30 °C with a vitreous silica dilatometer

GB/T 1040.1 Plastics - Determination of tensile properties - Part 1.General

principles

GB/T 1041 Plastics - Determination of compressive properties

GB/T 1633 Plastics - Thermoplastic materials - Determination of Virat softening

temperature (VST)

GB/T 2410 Determination of the luminous transmittance and haze of transparent

plastics

GB/T 3947-1996 Acoustic terminology

GB/T 5464 Non-combustibility test method for building materials

GB 8624-2012 Classification for burning behavior of building materials and

products

GB/T 8626 Test method of flammability for building materials

GB/T 9341 Plastics - Determination of flexural properties

GB/T 10299 Test method for hydrophobic nature of thermal insulation

GB/T 14153-1993 General rule of test method for impact resistance of rigid plastics

by means of falling weight

3 Terms and definitions

The terms and definitions, which are defined in GB/T 3947-1996, as well as the

following terms and definitions, apply to this document. For ease of use, some terms

and definitions in GB/T 3947-1996 are repeated below.

3.1

Railway sound barrier

A structure, which is built on both sides of a railway line, to reduce the impact of

train running noise on the acoustic environment.

3.2

Acoustic elements of sound barrier

A unit in a sound barrier, that functions as sound insulation and/or sound absorption.

3.3

Sound absorption coefficient

The ratio -- of the sum of the sound power, which is absorbed by the interface

(surface) or medium, plus the sound power, which is transmitted through the

interface (wall or partition, etc.), TO the incident sound power, at a given frequency

and condition. In general, the measurement conditions and frequencies shall be

explained. The sound absorption coefficient is equal to the sum of the loss

coefficient and the transmission coefficient.

[GB/T 3947-1996, definition 12.38]

3.4

Noise reduction coefficient

The arithmetic mean of sound absorption coefficients, which are measured at 250

Hz, 500 Hz, 1000 Hz, 2000 Hz, etc. It is calculated to two decimal places; the last

digit takes 0 or 5.

[GB/T 3947-1996, definition 12.43]

4 Technical requirements

5 Inspection methods

6 Inspection rules

1 Scope... 4

2 Normative references... 4

3 Terms and definitions... 5

4 Technical requirements... 7

5 Inspection methods... 9

6 Inspection rules... 11

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces TB/T 3122-2010 "Technique requirements and measurement of

acoustic elements of railway sound barrier". Compared with TB/T 3122-2010, the main

technical changes of this standard are as follows.

- MODIFY the requirements for acoustic performance, providing the requirements

for sound absorption and sound insulation performance of acoustic elements, by

frequency division (see 4.1; 4.1 of the 2010 edition);

- MODIFY the fireproof performance requirements and inspection methods (see 4.4

and 5.5; 4.4 and 5.5 of the 2010 edition);

- MODIFY the requirements and inspection methods for anti-corrosion performance

(see 4.5 and 5.6; 4.5 and 5.6 of the 2010 edition);

- ADD the requirements and inspection methods for waterproof performance of

acoustic elements of sound barriers (see 4.7 and 5.8);

- ADD the performance retention rate requirements and inspection methods, for

organic synthetic transparent panel acoustic elements (see 4.9 and 5.10).

This standard shall be under the jurisdiction of the Institute of Energy Conservation,

Environmental Protection, Labor and Sanitation of China Academy of Railway

Sciences Group Co., Ltd.

The drafting organizations of this standard. Energy Conservation, Environmental

Protection, Labor and Sanitation Research Institute of China Railway Research Institute

Group Co., Ltd., China Railway Economic Planning Research Institute Co., Ltd., China

Railway Design Group Co., Ltd.

1 Scope

This standard specifies terms and definitions, technical requirements, inspection

methods, inspection rules for acoustic elements of railway sound barriers.

This standard applies to the design, manufacture, product inspection of acoustic

elements of railway sound barriers.

2 Normative references

The following documents are essential to the application of this document. For the dated

documents, only the versions with the dates indicated are applicable to this document;

for the undated documents, only the latest version (including all the amendments) is

applicable to this standard.

GB/T 1036 Test method for coefficient of linear thermal expansion of plastics

between -30 °C and 30 °C with a vitreous silica dilatometer

GB/T 1040.1 Plastics - Determination of tensile properties - Part 1.General

principles

GB/T 1041 Plastics - Determination of compressive properties

GB/T 1633 Plastics - Thermoplastic materials - Determination of Virat softening

temperature (VST)

GB/T 2410 Determination of the luminous transmittance and haze of transparent

plastics

GB/T 3947-1996 Acoustic terminology

GB/T 5464 Non-combustibility test method for building materials

GB 8624-2012 Classification for burning behavior of building materials and

products

GB/T 8626 Test method of flammability for building materials

GB/T 9341 Plastics - Determination of flexural properties

GB/T 10299 Test method for hydrophobic nature of thermal insulation

GB/T 14153-1993 General rule of test method for impact resistance of rigid plastics

by means of falling weight

3 Terms and definitions

The terms and definitions, which are defined in GB/T 3947-1996, as well as the

following terms and definitions, apply to this document. For ease of use, some terms

and definitions in GB/T 3947-1996 are repeated below.

3.1

Railway sound barrier

A structure, which is built on both sides of a railway line, to reduce the impact of

train running noise on the acoustic environment.

3.2

Acoustic elements of sound barrier

A unit in a sound barrier, that functions as sound insulation and/or sound absorption.

3.3

Sound absorption coefficient

The ratio -- of the sum of the sound power, which is absorbed by the interface

(surface) or medium, plus the sound power, which is transmitted through the

interface (wall or partition, etc.), TO the incident sound power, at a given frequency

and condition. In general, the measurement conditions and frequencies shall be

explained. The sound absorption coefficient is equal to the sum of the loss

coefficient and the transmission coefficient.

[GB/T 3947-1996, definition 12.38]

3.4

Noise reduction coefficient

The arithmetic mean of sound absorption coefficients, which are measured at 250

Hz, 500 Hz, 1000 Hz, 2000 Hz, etc. It is calculated to two decimal places; the last

digit takes 0 or 5.

[GB/T 3947-1996, definition 12.43]

4 Technical requirements

5 Inspection methods

6 Inspection rules