庙山特大桥深基坑钢管桩支护设计研究
A Study of the Design of the Steel-Pipe Pile Supporting Structure for the Deep Foundation Pit of the Miaoshan Mega Bridge
  
中文关键词:深基坑  钢管桩  提前封底  设计计算
英文关键词:deep foundation pit  steel-pipe pile  advanced sealing  design and calculation
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作者单位
范中坡 中铁十八局集团第五工程有限公司天津300459 
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中文摘要:
      针对庙山特大桥深基坑的土层参数和水位条件,通过造价、封水效果、环境影响和工期等条件进行合理分析,最后确定采用锁口钢管桩支护的方案。由于采取了双浆液提前封底的方案优化措施,不仅保证了开挖过程基坑的稳定,并且降低了围囹受力,减少了围囹数量,方便了开挖作业。同时通过理正深基坑7.0对支护结构进行了整体协同计算,计算结果表明支护结构强度、位移均满足要求。
英文摘要:
      With the parameters of the soil layers and the water level conditions of the deep foundation pit for the Miaoshan Mega Bridge taken into account, and upon the basis of rationally analyzing the costs the water-sealing effect,the environmental influence,construction duration and other conditions,the scheme of the locking steel pipe pile support is finally chosen.With the scheme-optimizing measure of sealing the bottom with the dual slurry liquid taken in advance,the stability of the foundation pit is ensured during excavation,the stress of the waling is reduced, the amounts of the waling are decreased and the excavation is facilitated as well. In the meantime, the supporting structure is comprehensively calculated as a whole with the software of the Leezheng 7.0.The result of the calculations shows that both the strength and the displacement of the supporting structure meet the requirements.
范中坡.庙山特大桥深基坑钢管桩支护设计研究[J].国防交通工程与技术,2017,15(4):73~76
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