Study on the Segment Damage Mechanism of Curved Shield Tunnels during Construction Stage

Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 10

Abstract

Objective Damage to shield tunnel segments will cause water seepage in the tunnel, affecting the structural bearing capacity and endanger the operational safety. Therefore, it is necessary to study the mechanism of segment structure damage. Method Through investigation and statistics, the occurrence law and influencing factors of segment diseases are obtained. ABAQUS software is used to conduct a numerical analysis on the force characteristics of segment detail structure, circumferential bolts, longitudinal bolts and concave-convex tenons under different jack horizontal thrusts. Result & Conclusion The incidence of segment damage increases gradually from vault to hance and then to arch bottom, and the incidence of damage in arch bottom area is the highest. The segment damage is closely related to the thrust value of the jack partitions. Numerical simulation results show that with the increase of the total thrust value, the maximum principal stress value of the bolt decreases gradually, while the value at the concave-convex tenon increases rapidly. The greater the thrust, the smaller the longitudinal bolt stress value. When the thrust is too large, the longitudinal bolt tensile stress tends to 0, the segment shrinks longitudinally, and the pressure on the segment increases sharply.

Authors and Affiliations

Bin ZHU

Keywords

Related Articles

Research on Switch Machine Fault Diagnosis Based on Integrated Deep Learning

Objective To make full use of fault log data for diagnosing switch machine faults, a fault diagnosis method based on integrated deep learning is proposed. Method By analyzing the textual data of switch machine faults and...

Research on Rail Transit Vehicle Wheel Axle Locking Fault Prediction Model

Objective Improper assembly of wheel axles, excessive operation during maintenance leading to axle surface irregularities, or abrasions and defects caused by electrical corrosion during operation exacerbate abnormal faul...

Toe Load Detection and Test Verification Based on the Natural Frequency of Fastener Elastic Rod

Objective The insufficient toe load of the fastener elastic rod will induce loosening of the surrounding fasteners, aggravate the dynamic response between wheels and rails, affecting the service life of the track compone...

Simulation Research on Temperature Control of Metro Underground Substation Main Transformer Room

Objective Huge heat is generated during underground substation transformer operation. Failure to promptly dissipate this heat can lead to problems such as transformer overheating, equipment malfunctions, and even fire ac...

Inbound Passenger Flow Prediction of Spatio-temporal Graph Convolutional Neural Network for Urban Rail Transit Based on Spatio-temporal Correlation

Objective Accurate short term passenger flow prediction is of great significance to improve the operation and management efficiency of the ultra-large scale of urban rail transit network. However, the current research on...

Download PDF file
  • EP ID EP749223
  • DOI 10.16037/j.1007-869x.2024.10.020
  • Views 54
  • Downloads 0

How To Cite

Bin ZHU (2024). Study on the Segment Damage Mechanism of Curved Shield Tunnels during Construction Stage. Urban Mass Transit, 27(10), -. https://europub.co.uk/articles/-A-749223