Sound barriers, primarily used for noise reduction and sound insulation on highways, expressways, elevated composite roads, and other noise sources. The sound barrier is mainly composed of two parts: steel structural columns and sound-absorbing/insulating panels. The columns serve as the main load-bearing components of the sound barrier, fixed to the road anti-collision wall or the pre-buried steel plate at the edge of the track with bolts or welding. The sound-absorbing/insulating panels are the primary components for sound insulation and absorption, secured in the H-shaped column channels with high-strength spring clips to form the sound barrier. The design of the sound barrier has thoroughly considered the wind load from elevated expressways, urban light rail, and subway systems, the safety of traffic vehicle impacts, and the anti-corrosion issues for outdoor use in all weather conditions. It boasts an aesthetically pleasing appearance, exquisite craftsmanship, ease of transportation and installation, low cost, and a long service life. It is particularly suitable for noise reduction applications on elevated expressways and urban light rail and subway systems, making it an ideal sound insulation and noise reduction facility for modern cities.

Jiansheng Testing specializes in various acoustic barrier inspections. The main material properties for acoustic barrier inspection, including specifications and drawing requirements, are tested using laboratory methods. Inspections are categorized into two types: highway acoustic barrier inspection and railway acoustic barrier inspection. The railway acoustic barrier inspection standard is TB/T 3122-2019 "Acoustic Components of Railway Acoustic Barriers," and the highway acoustic barrier inspection is based on JT/T 646.4-2016 "Part 4: Technical Requirements and Inspection Methods for Acoustic Materials of Highway Acoustic Barriers." Both standards provide regulations on the appearance, acoustic, impact resistance, fire resistance, corrosion resistance, wind pressure resistance, and light transmission rate, tensile strength, elongation at break, bending strength, modulus of elasticity, linear thermal expansion coefficient, and softening temperature of transparent acoustic barriers (organic synthetic transparent panels). There are also specification requirements for the inspection of steel components in acoustic barrier inspections. For steel component inspections in acoustic barriers, refer to GB/T 18226-2015 "Technical Conditions for Corrosion Prevention of Steel Components in Highway Traffic Engineering," GB700-2006 "Carbon Structural Steel," and GB/T 228.1-2010 "Tensile Testing of金属材料—Part 1: Test Method at Room Temperature."

By employing the aforementioned testing methods for noise barrier inspections, in conjunction with the relevant regulations in the design documents and drawings, we evaluate the results of the noise barrier testing. This assessment determines whether the results of the highway noise barrier or the railway noise barrier meet the relevant technical requirements, thereby ensuring the quality of the noise barriers.