GB/T 39705-2020Track bed vibration isolating mat for rail traffic (English PDF)

1 Scope

This standard specifies the classification and structure, technical requirements, test methods, and inspection of track bed vibration isolation cushions for rail transit (hereinafter referred to as track mattresses)

Rules, signs, packaging, transportation and storage, construction requirements:

This standard applies to the polymer material track mattress for ballasted track and ballastless track of urban rail transit that adopts wheel-rail transportation:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article

Pieces: For undated references, the latest version (including all amendments) applies to this document:

GB/T 528 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber

GB/T 1690 Liquid resistance test method for vulcanized rubber or thermoplastic rubber

GB/T 2941 Rubber Physical Test Method General Procedure for Sample Preparation and Adjustment

GB/T 3512 Hot air accelerated aging and heat resistance test of vulcanized rubber or thermoplastic rubber

GB/T 3672:1 Tolerances of rubber products Part 1: Dimensional tolerances

GB/T 6343 Determination of Apparent Density of Foam Plastic and Rubber

GB/T 7759:1 Determination of compression set of vulcanized rubber or thermoplastic rubber Part 1: Under normal and high temperature conditions

GB/T 9258:1 Particle size analysis of abrasives for coated abrasives Part 1: Particle size composition

GB/T 10653 Determination of Compression Set of High Polymer Porous Elastic Materials

GB/T 10654 Determination of tensile strength and elongation at break for high polymer porous elastic materials

3 Terms and definitions

The following terms and definitions apply to this document:

3:1

Static foundation modulus staticbeddingmodulus

The ratio of static load to displacement per unit area:

Note: The unit is cattle per cubic millimeter (N/mm3):

3:2

Dynamic foundation modulus dynamicbeddingmodulus

Under a certain loading frequency, the ratio of dynamic load per unit area to displacement:

Note: The unit is cattle per cubic millimeter (N/mm3):

4 Classification and structure

4:1 Classification

Road mattresses are divided into solid mattresses and microporous mattresses: