-
Soundproof Wall
Soundproof wall with anchor bolts that applying anti-loosening bolt during repeated vibration of the structure due to wind load or traffic load.
- Review of tunnel-type soundproofing facility design improvements (2020.9, Korea Expressway Corporation)
- Safety secured by introducing a support anchor bolt loosening prevention system
Special Feature
Improved safety of the foundation of soundproof wall by using double-helix bolts and two nuts with different pitch intervals and phase differences.
| 01 |
Bolt threads with different rotation directions, Two nuts with different rotation directions (forward, reverse) Prevent structure from falling due to bolt loosening |
|---|---|
| 02 |
Anchor bolt overlocking structure is formed inside the bolt cap
Prevents bolt caps from falling off or being lost during use |
Components
Double helix bolt with different rotation direction and pitch interval and two nuts with opposite rotation direction
Performance Verification
Double helix anti-loosening anchor bolt vibration test
More than 5 times difference in fastening force loss
Anti-loosening bolt in fastening force loss : -53kg / General bolt in fastening force loss : -278kg
Anti-loosening bolt in fastening force loss : -53kg / General bolt in fastening force loss : -278kg