地铁车辆段软土区PHDC桩桩板结构线路沉降数值模拟计算分析

Numerical Simulation Calculation and Analysis of Line Settlement of PHDC Pile-slab Structure in Soft Soil Area of Metro Depot

依托宁波市轨道交通5号线经堂庵跟车辆段整体道床线路,运用abaqus有限元软件计算分析了在轨道和列车荷载换算土柱作用下,桩长、桩径、桩体刚度及桩间距对地铁车辆段软土区PHDC桩桩板结构线路沉降的影响,得出了最佳桩长和纵向合理桩间距,发现桩径对穿越软土层的那一段PHDC桩基沉降有显著影响,而桩体弹性模量的变化对线路沉降量的影响微乎其微。

Relying on the overall track bed line of Jingtangyangen Metro Depot of Ningbo Metro Line 5,the abaqus finite element software is used to calculate and analyze the influences of the pile length, pile diameter, pile body rigidity and pile spacing on the settlement of PHDC pile-slab structure line in the soft soil area of Metro Depot under the action of track and train load conversion soil column. The optimal pile length and the reasonable longitudinal pile spacing are obtained. It is found that the pile diameter has a significant effect on the settlement of the PHDC pile foundation crossing the soft soil, while the change of elastic modulus of pile has little effect on the line settlement.