摘要
研究目的:针对福州站北广场存在深厚淤泥层的地质情况,结合南侧紧邻既有铁路站台、其余侧周边无重要建筑物的环境实际,考虑工期要求,制定基坑支护方案为南侧排桩+竖向斜支撑、其余侧放坡喷锚+平台+悬臂桩。本工程中的设计方案、监测对比结果可供类似工程参考。研究结论:(1)针对软土地区面积较大的基坑,根据基坑侧壁不同控制要求,有针对性的制定位移控制为主的排桩结合竖向斜支撑方案,稳定性控制为主的放坡结合悬臂桩方案,经监测数据验证,本方案合理可行,可供类似工程参考;(2)基坑设计过程中应注重基坑侧壁实际情况的调查,利用已有加固措施来合理提高岩土参数,可节省工程投资,缩短工期;(3)施工过程中应严格控制基坑周边超载,确保基坑变形量处于允许范围内,减少基坑事故风险;(4)本研究成果可为软土地区深基坑支护设计与施工提供指导。
Research purposes： As for the existence of the deep silt layers at Fuzhou Station north plaza, according to the actual environment adjacent to the existing railway station at the south side and without important buildings around the other side, considering the requirements of the time limit for a project, this paper developed excavations supporting scheme using the row pile ＋ vertical inclined brace at the south side and sloped ejector anchor ＋ platform ＋ cantilever pile around the other side. The design scheme and monitoring results of this project can be used for reference of similar projects.
Research conclusions ： （ 1 ） In view of the larger excavations of soft soil area, according to the requirements of the lateral wall of the excavations with different control, we formulate the scheme of row pile of displacement control combined with vertical inclined supporting and sloping of stability control with cantilever pile, the reasonable conclusion was verified by the monitoring data which can be used for reference of similar projects. （2） In the process of excavations design, we should pay attention to the actual situation of the side wall of excavations, and use existing reinforcement measures to improve the geotechnical parameters reasonably, to save engineering investment and shorten the time limit. （3） During the construction, the overload of the excavations should be strictly controlled, the deformation quantity of the excavations should be in the allowable range, and the risk of excavations accidents should be reduced. （4） The research results can provide guidance for the design and construction of deep excavation in soft soil area.
出处
《铁道工程学报》
EI
北大核心
2015年第10期38-43,共6页
Journal of Railway Engineering Society
基金
中国铁路总公司科技研究开发计划项目(2014G008-D)
关键词
基坑设计
竖向斜支撑
基坑监测
对比分析
excavations design
vertical inclined brace
pit monitoring
comparative analysis
