北汝河倒虹吸工程基础顶托破坏分析及处理措施
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摘要
深基坑开挖过程中常发生基础顶托破坏事件,本文以北汝河倒虹吸工程混凝土垫层顶托破坏为例,通过破坏的各种现象并结合地质情况,分析得出其破坏的主要原因为裂隙承压水所致,通过降低承压水头和换填相结合的方法,既满足了工程安全的要求,同时降低了降压成本,实践证明此处理方案可行,可以作为其它类似地质情况的深开挖工程处理方案。
Foundation jacking destruction events often occur in the process of deep foundation excavation , This paper concludes that fracture confined water was the main cause of the cause, through the analysis of various phenomena and geological conditions of the Beiru river inverted siphon concrete cushion destruction, To lower artesian head and Replacement method combined, can meet the engineering safety requirements, but also can reduce the cost of lowering artesian head. it has been proved that this treatment is feasible and can be used as other similar geological conditions of deep excavation engineering.
Foundation jacking destruction events often occur in the process of deep foundation excavation , This paper concludes that fracture confined water was the main cause of the cause, through the analysis of various phenomena and geological conditions of the Beiru river inverted siphon concrete cushion destruction, To lower artesian head and Replacement method combined, can meet the engineering safety requirements, but also can reduce the cost of lowering artesian head. it has been proved that this treatment is feasible and can be used as other similar geological conditions of deep excavation engineering.
引文
[1]张永波,孙新忠.基坑降水工程[M].北京:地震出版社,2000
[2]郭勤军.基础换填法在南水北调北汝河倒虹吸工程中的应用[J].大坝与安全2011(6):27-28
[2]郭勤军.基础换填法在南水北调北汝河倒虹吸工程中的应用[J].大坝与安全2011(6):27-28
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