Imagen de Portada

Mechanical Characteristics and Safety Evaluation of Tunnel Lining Structures in Karst Areas Under Heavy Rainfall Conditions

Guardado en:
Publicado en:Buildings vol. 15, no. 10 (2025), p. 1756
Autor principal: Qian Wangping
Otros Autores: Tang, Xu, Ma, Xiaoxin, Wang, Xiaonan
Publicado:
MDPI AG
Materias:
Structural engineering
Water pressure
Karst
Structural safety
Tunnels
Rainfall
Drainage
Safety
Mechanical properties
Rocks
Tunnel linings
Tunnel construction
Case studies
Design optimization
Simulation
Construction
Bending moments
Structural integrity
Failure modes
Optimization
Water damage
Internal forces
Holes
Structural stability
Acceso en línea:Citation/Abstract
Full Text + Graphics
Full Text - PDF
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
Resumen:Karst tunnels accumulate localized high water pressure during heavy rainfall, which can potentially induce cracks and damage to tunnel structures. By fully analyzing the stress characteristics of the lining structure and the critical water pressure, this study aims to evaluate the safety status of karst tunnels under heavy rainfall conditions, and proposes detailed tunnel optimization solutions. The results indicate that the outward deformation of the structure is restricted when the water pressure within the cavity is low, thus enhancing structural stability. However, the internal forces of the structure gradually increase as water pressure increases. Additionally, the mechanical properties of the surrounding rock significantly influence the internal forces. The bending moment in the lining structure is highest in the grade III surrounding rock under the same water pressure. However, the critical water pressure of the lining structure differs by surrounding rock grade due to varying constraints, following the order IV > V > III. Moreover, karst cavities located at the arch spandrel exert the greatest detrimental effect on the structure. Furthermore, the critical water pressure and concrete failure modes of the lining structure under different conditions are determined. Lastly, the optimization of the construction and design of the actual tunnel is proposed to enhance the structural integrity of the tunnel lining. These findings provide valuable insights for structural safety assessments under various karst cavity conditions.
ISSN:2075-5309
DOI:10.3390/buildings15101756
Fuente:Engineering Database