Study on influence of construction sequence of Pile-Beam-Arch station pilot tunnels on surface settlement
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 6
Abstract
Objective During construction of PBA(pile-beam-arch) method stations, land subsidence is greatly affected by the guiding hole excavation sequence. In order to effectively control land subsidence, it is necessary to study the influence law of the guiding hole construction sequence. Method Based on the engineering background of Tiancun Station, a three-dimensional guiding hole construction model for the tunnel of 3-pillar 4-span PBA method station is established, and a reasonable guiding hole excavation sequence is obtained. Based on the above result, in order to shorten the construction period, a staggered synchronous excavation method for the guiding hole construction is proposed, and its effect on land subsidence control is studied based on the on-site measured data. Result & Conclusion The land subsidence is smaller when the lower layer guiding hole is excavated first. When the guiding holes are close to each other, simultaneous excavation will produce group hole effect. In order to effectively control land subsidence in actual construction,separate excavation or staggered excavation should be used.The staggered synchronous excavation method for guiding hole construction has a good effect on land subsidence control,and significantly shortens the construction period. The above method can provide a reference for the similar large-span tunnel station construction.
Authors and Affiliations
Saihong HU
Keywords
Related Articles
- EP ID EP737759
- DOI 10.16037/j.1007-869x.2024.06.030
- Views 47
- Downloads 0
Fire Smoke Control and Personnel Safety Evacuation under Dual-train Tracking Mode in Urban Rail Transit Ultra-long Tunnel
Objective In urban rail transit, train departure intervals are generally short, leading to situations where two trains travel in the same direction within ultra-long tunnels. In the event of a fire, this scenario can res...
Flexible Process Design for Urban Rail Transit Vehicle Overhaul
[Objective] Overhaul operations for urban rail transit vehicles pose challenges and bottlenecks in the organization of maintenance work. Currently, there is a lack of systematic exploration of the overhaul contents and p...
Metro Train Braking Simulation Control System Based on EP2002 Braking System
[Objective] To address the issue of the highly integrated internal structure of the EP2002 valve system, which hinders internal fault injection, a metro train braking simulation control system that accurately reflects th...
Study on Vertical Coupling Vibration Law of Metro Vehicle Based on Flexible Carbody
Objective With the increase in train operating speed and the adoption of lightweight design, the dynamic forces between the wheel-rail interface are intensified, leading to exacerbated vibrations among various components...
Development of Short-Circuit Impedance Testing and Setting Calculation Device for Urban Rail Transit Catenary
Objective The line impedance of urban rail transit catenary is significantly affected by many factors such as wire material, line length, surrounding environment, etc., resulting in significant impedance differences betw...