Numerical study of the vibration suppression effect of a new vibration suppression method based on a shielding wall. (25th July 2022)

• Record Type: Journal Article
• Authors: Wang, Qiankuan; Qiu, Shili; Li, Shaojun; Li, Ping; Jiang, Quan; Cheng, Yao; Zhang, Shirui
• Is Part Of: Construction & building materials. Volume 341(2022)
• Publication Date: 2022-07-25
• Subjects: Vibration suppression -- Shielding wall -- Backfill condition -- Seismic hazards -- Underground laboratory; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2022.127764
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: A new and efficient vibration suppression method is proposed based on a shielding wall. The ground motion characteristics are simulated around a deep underground laboratory. The shielding wall can be used for seismic hazard prevention in underground laboratories and surface buildings. Abstract: A deep underground laboratory is an important research site for fields such as particle physics, astrophysics and cosmology, which require not only sophisticated technology and precision instruments but also stable and interference-free research environments. Ground motion can introduce interference with some precision instruments, causing the instruments to fail to work normally with the highest accuracy and even causing serious errors. Therefore, effective vibration suppression measures play a vital role in underground laboratory research. Based on the shielding effect underground structures have on ground motions, a shielding wall is proposed as a new vibration suppression method. By simulating the ground motion characteristics of various models (background models, excavation models, and backfill models) in the Jinping Underground Laboratory, the high-efficiency vibration suppression effect of a shielding wall was demonstrated. The influence of different backfill conditions on the vibration suppression effect of the shielding wall was systematically analysed, and a nonbackfilled shielding wall was determined to be the best vibration suppression option. Moreover, the influence of the length, position and angle of the shielding wall on its vibration suppression effect and the potential application prospects of the shielding wall were also discussed. Shielding walls enrich and develop vibration suppression measures, providing a new method for the prevention and control of seismic hazards in underground laboratories and surface buildings under dynamic load conditions.