What are the installation requirements for high-speed sound barriers?

The construction process of high-speed sound barriers is strict. To ensure the durability and structural safety of the high-speed sound barrier installation, different channels need to be selected to reduce the surrounding noise and meet people's living needs. The relevant content will be introduced in detail below.

The sound barrier foundation built on the high-speed roadbed should be constructed simultaneously with the high-speed roadbed. It should not be damaged by its structure. Before laying the foundation vehicle body, laying the track, and laying the cable trough, the foundation construction of the roadbed should be stabilized to form a safe sound barrier. Before construction, the location of various pipelines on the roadbed should be determined; according to the basic size of the sound barrier and its location on the shoulder, it is strictly forbidden to damage various pipelines when cutting and slotting. The high-speed sound barrier foundation should be constructed according to the design requirements, shape, and depth. The foundation excavation shall not damage the subgrade surface. Anchor rods are embedded in the high-speed sound barrier foundation, and the anchor rod holes use grouting construction materials. The construction method should meet the design requirements and should not affect the safety and stability of the roadbed. The high-speed sound barrier foundation should be built according to the design requirements of expansion joints. There is an expansion joint every 20~30 meters of the sound insulation foundation. The specific location of the expansion joint should be determined according to the site terrain during construction. Drainage pipes should be pre-embedded in the high-speed sound barrier foundation according to the design requirements, and the drainage pipe outlet should not scour the roadbed; the concrete foundation construction at the intersection of the ballastless track line and the sump drainage pipe should not damage the drainage pipe. A 100mmL PVC pipe is buried every 2m at the top of the foundation to drain rainwater to the shoulder surface inside the sound barrier; a 75mm straight PVC pipe is buried every 4m at a slope of 2% in the variable section in the middle of the foundation to drain the seepage water from the roadbed and the drainage from the cable trough; the sump connecting drainage pipe between the roadbed lines of the ballastless track line can be cast on the foundation. Drainage facilities should be set up for the roadbed sound barrier, and the external drainage outlet should avoid scouring the roadbed slope and prevent sound leakage. After the high-speed sound barrier foundation is completely filled with concrete, its surface should be flush with the roadbed surface. The strength test of the high-speed sound barrier foundation concrete should meet the strength standards specified in the relevant standards.

High-speed sound barriers are designed to control highway noise, such as diffuse noise caused by vehicles, and reflect it to the surrounding environment; therefore, there are different types of passages. Metal louver aperture sound barriers also become louver sound barriers: screen body panel shutter aperture, sound waves hit the barrier, they will fall into the hole, and there is a thick layer of sound-absorbing cotton in the middle of the plate, it is not easy for noise to come out, it is a kind of high-speed highway sound insulation barrier used, the shutter Hong Kong barrier is mainly made of metal materials, and it can also be called a small shutter sound barrier and a large shutter sound barrier through the transmission size. Microporous sound barriers also have certain applications on railways. The screen body is made of galvanized steel plate and aluminum plate. There are perforated plates on the panel. When sound waves hit the barrier, they will fall into the holes. There is a thick layer of sound-absorbing cotton in the middle of the screen, and the noise trapped inside is not easy to come out. The sound-absorbing cotton is covered with alkali-free water-repellent fiberglass cloth. The surface of the screen is coated with a strong corrosion resistance and long service life. Metal microporous sound barriers commonly use metal H-shaped steel columns, which have the advantages of high shear strength, high compressive strength, corrosion resistance, and easy installation.

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