What it is and when to use it. A railway sound barrier protects residential areas, schools and hospitals along rail lines from train pass-by noise. HANWEI railway barriers achieve Rw ≥ 30 dB with an NRC ≥ 0.85 absorptive core, and earthwork sections routinely measure 10–20 dB(A) insertion loss. Heights run 2.0–3.5 m standard, extendable to 5 m or semi-arc/semi-enclosed forms where the exceedance is severe. The system covers conventional, high-speed and intercity lines from 120 to 350 km/h, with proven post and foundation details for both earthwork and bridge sections.
The railway difference: aerodynamic fatigue. What separates a railway barrier from a road barrier is the train-induced pulsating wind. At 250–350 km/h, a passing train imposes a 0.5–1.2 kPa fluctuating pressure on the panels, cycling hundreds of times a day — a far harsher fatigue environment than any natural wind. Every connection and stopping element in our railway panels is therefore fatigue-checked: hot-dip galvanized H-posts, nylon-insert lock nuts with torque-marked bolts, and rubber stopping strips compressed tight so panels cannot rattle or work loose. This is also why a standard road barrier must never be re-badged for railway use.
Engineering and site practice. Design targets follow GB 3096 Class 4b (70 dB day / 60 dB night) and GB 12525 at the railway boundary; insertion loss is predicted per train type, speed and traffic density before heights are fixed. On site, two lessons from our own projects shape the workflow: first, foundation positions must be coordinated with the four railway services (signalling, communications, power, OCL) at the drawing-review stage — a cable-trough clash we once hit cost a month of rework, so now the four-discipline review is mandatory; second, all trackside work runs inside possession windows, so the programme is planned backwards from daily possession hours. First shipment typically leaves the factory 7–15 days after design approval, with 5,000 ㎡ daily panel capacity behind it.