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

摘要:

为了研究软土区PHDC桩桩板结构线路沉降及其影响因素,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。

Abstract:

SIn order to study the settlement and influence factors of PHDC pile-slab structure line in soft soil area, the abaqus finite element software was used to calculate and analyze the influence of pile length, pile diameter, pile 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 based on the overall track bed line of Jingtangyangen Metro depot of Ningbo rail transit line 5. The optimal pile length and reasonable longitudinal pile spacing are obtained. It is found that the pile diameter has a significant effect on the settlement of the PHDC pile length crossing the soft soil, while the change of elastic modulus of pile has little effect on the line settlement.