Analysis of Grouting Reinforcement Scope and Excavation Scheme for Shield Tunnel Link Passage
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 6
Abstract
[Objective] During the construction of shield tunnel link passages using mining method, excessive soil collapse and land subsidence can pose significant safety risks. Since the scope of grouting reinforcement and the excavation scheme directly affect land subsidence and the safety of existing tunnels，it is necessary to analyze both the grouting reinforcement scope and the excavation strategy. [Method] Taking the link passage between Tanzikou Station and Dinggong Road South Station on Nanchang Rail Transit Line 4 as research object, the effects of different grouting reinforcement scopes and excavation partitions on tunnel excavation is simulated by PLAXIS 3D finite element software. The finite element simulation results are compared with actual monitoring data for validation. [Result & Conclusion] Partitioned excavation of link passage effectively reduces tunnel and passage deformation, as well as land subsidence. A larger grouting scope results in less deformation and subsidence; when the grouting reinforcement scope exceeds 3 meters, further increase in reinforcement thickness leads to only slight land subsidence reduction. A grouting reinforcement scope of 3 meters for link passage is both economically efficient and meets all safety and design requirements.
Authors and Affiliations
Bo WANG, Yunzhou WANG, Kai CHEN
Keywords
Related Articles
- EP ID EP770001
- DOI 10.16037/j.1007-869x.20230553
- Views 3
- Downloads 0
Active Selection Control Scheme for Dual Pantographs Based on TCMS
[Objective] Pantograph malfunctions can result in the loss of train traction capability, significantly impacting the normal operation of train. To address uneven carbon slide wear of two pantographs on the same vehicle o...
Technical Solution to Information Security of Intelligent Operation and Maintenance System for Urban Rail Transit Vehicles
Objective With the rapid growth of urban rail transit scale, the application of information-based intelligent vehicle operation and maintenance system becomes increasingly extensive, and the information security problem...
Prediction of Traction Energy Consumption for Urban Rail Transit Trains in Relative Speed Mode
［Objective］ It is aimed to accurately predict the traction energy consumption of urban rail transit trains operating in relative speed mode using support vector machine（SVM）regression and genetic algorithms, ultimate...
Research on High Power Fire Smoke Exhausting Scheme for Straddle Monorail Tunnel with Large Slope
［Objective］ The increase of fire power and slope steepness in straddle monorail tunnel will lead to the rise of critical wind speed for fire and the addition of smoke exhausting equipment configuration. Therefore, it i...
Safety Envelope Management Method for Marshaled Trains Based on Time Delay Protection
[Objective] In flexible marshaled trains, the communication delay between the master railcar, subordinate railcar and ZC (zone controller) exhibits asynchrony, leading to potential issues such as overlapping, misalignmen...