滨海填土区桥下车辆运输荷载对邻近桩基影响研究
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摘要
地表填土及车辆荷载会对临近桩基产生不利的侧向挤压变形问题,结合沿海某填土工程,填土区临近既有高速桥梁,为了满足填土区往返运输要求,采用高速桥梁桥下中分带便道作为运输道路。由于填土施工便道下穿近距离并行桥梁桩基,最近仅为4m,通过考虑不同车辆运输荷载以及不同车辆间距工况下,研究了车辆运输荷载对临近桥梁桩基的影响。不同工况计算结果表明,便道上的运土车辆荷载对邻近桥桩影响均较小,桥桩的水平位移最大值均小于5mm,满足工程安全要求。通过对车辆运输荷载的影响分析,有助于对类似便道车辆荷载近距离桥梁时安全防护提供有益参考。
The filling soil and vehicle loading could cause negative lateral extrusion deformation problems on adjacent pile foundation. Combined with a coastal, reclamation fill area near the existing highway Bridges, in order to meet the filling area round-trip transportation requirements, the high-speed zonal pavement is used as transportation road bridge under the bridge. Due to the filling construction road close parallel bridge pile foundation, the recent distance is just 4 m. By considering the different vehicles transportation load and different distance conditions, studied the vehicle transportation load effect on the adjacent bridge pile foundation. The calculation results of different working conditions show that the load of the truck on the pavement has less influence on the adjacent pile, and the maximum horizontal displacement of the pile is less than 5 mm, which meets the engineering safety requirements. Through the analysis of the impact on vehicle transport load, it is helpful to provide a useful reference for the safety protection of similar road vehicles.
The filling soil and vehicle loading could cause negative lateral extrusion deformation problems on adjacent pile foundation. Combined with a coastal, reclamation fill area near the existing highway Bridges, in order to meet the filling area round-trip transportation requirements, the high-speed zonal pavement is used as transportation road bridge under the bridge. Due to the filling construction road close parallel bridge pile foundation, the recent distance is just 4 m. By considering the different vehicles transportation load and different distance conditions, studied the vehicle transportation load effect on the adjacent bridge pile foundation. The calculation results of different working conditions show that the load of the truck on the pavement has less influence on the adjacent pile, and the maximum horizontal displacement of the pile is less than 5 mm, which meets the engineering safety requirements. Through the analysis of the impact on vehicle transport load, it is helpful to provide a useful reference for the safety protection of similar road vehicles.
引文
[1] 邱洪志,孔纪名,王仁超,等.车辆荷载对支护桩主动土压力的影响分析[J].岩土工程学报,2016,38(3):486-493.
[2] 颜涛. 移动荷载作用下基坑支护结构响应分析[D].武汉:武汉理工大学,2011.
[3] 杨忠良. 交通荷载对道路两侧建筑物桩土体系受力性状的影响研究[D].杭州:浙江大学,2006.
[4] 刘晨彬.填土和车载对桥墩桩稳定性的影响研究[J].铁道勘察,2011,37(5):76-79.
[5] 公路桥涵地基与基础设计规范:JTG D63—2007 [S].北京:人民交通出版社,2007.
[2] 颜涛. 移动荷载作用下基坑支护结构响应分析[D].武汉:武汉理工大学,2011.
[3] 杨忠良. 交通荷载对道路两侧建筑物桩土体系受力性状的影响研究[D].杭州:浙江大学,2006.
[4] 刘晨彬.填土和车载对桥墩桩稳定性的影响研究[J].铁道勘察,2011,37(5):76-79.
[5] 公路桥涵地基与基础设计规范:JTG D63—2007 [S].北京:人民交通出版社,2007.