Hazards of Waterproof Board Cutting Secondary Lining in Operating Tunnel and Remediation Schemes
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 10
Abstract
Objective With the acceleration of tunnel construction in China, various diseases in operating tunnels become increasingly prominent. Despite of many in-depth researches by scholars on various diseases, that on the hazards of waterproof board cutting secondary lining is still insufficient. Therefore, it is necessary to deeply explore the secondary lining cutting hazard in operating tunnels and propose effective remediation schemes. Method Based on the waterproofing and force mechanism of waterproof boards, numerical simulation technology is used to systematically study the secondary lining cutting hazard in operating tunnels. Focusing on the waterproof board arch bending moment, the Mises stress and the lining displacement under different circumferential and longitudinal cutting lengths, the changing law of their key indicators are emphatically analyzed. On this basis, a new remediation design scheme is proposed, and the rationality-superiority of the remediation design scheme is verified by comparing the changes in the lining structure vault displacement before and after the waterproof board remediation. Result & Conclusion With the increase in the circumferential and longitudinal cutting lengths of the waterproof board, the arch bending moment, the lining stress and displacement all show a significant growth trend. In particular, the longitudinal cutting length of the waterproof board has a more significant impact on the three indicators such as lining displacement. Through comprehensively analyzing the sudden change areas of bending moment, stress and displacement, it is found that when the waterproof board circumferential and longitudinal cutting lengths are in the range of 2~3 m, the impact on stress and deformation of the lining structure is most unfavorable.
Authors and Affiliations
Yunfei SHI, Xingwang GONG, Zhenqi YU, Lun GONG, Zelin LIU, Xiaoti CUI
Keywords
Related Articles
- EP ID EP749221
- DOI 10.16037/j.1007-869x.2024.10.018
- Views 27
- Downloads 0
Conversion Scheme Design of Power Supply Return Mode for Metro Connection Lines
Objective The metro lines connected by connection line may adopt different power supply current return modes. In order to improve the efficiency of train line transfer, it is necessary to set up the return mode conversio...
Sensitivity Analysis of Design Parameters for Suspended Monorail Single-ribbed Arch Bridge
[Objective] As there are few case studies on suspended monorail single-ribbed arch bridge, it is necessary to analyze the sensitivity of different design parameters to better instruct the design and construction of the b...
Establishment of Digitalized Intelligent Construction-site Comprehensive Monitoring System
[Objective] To address the issues of delayed, ineffective communication of information and declining instructions among various stakeholders during metro project construction, it is necessary to improve data integration,...
Sonar Detection and Comprehensive Treatment of Water Inrush Disaster for Metro Station Deep Foundation Pit in Complex Karst Strata
Objective In Foshan Area, due to the specific characteristics of the complex karst stratum, the calcareous siltstone stratum and the fracture zone can easily cause water inrush disaster in metro station foundation pit. T...
Analysis and Prospect of Hydrogen Energy Application in the Field of Rail Transit
Objective Hydrogen energy becomes one of the solutions for energy transition in rail transit due to its characteristics such as abundant reserves, ecological friendliness, and efficient transition. At the initial stage o...