Risk Control Technology for Underground Excavation Construction of SubwayMemorial Hall Stations in Complex Environments:Taking the Memorial Hall Station of Guangzhou Metro Line 13 Phase Ⅱ Project as an Example
There are many underground excavation stations using the arch cover method in Guangzhou Metro engineering.Due to the presence of weak strata such as sand layer,muddy clay and silty clay at the top of the underground excavation stations,they generally have characteristics such as high water content,high compressibility,low permeability,and low strength.During the construction phase,they are prone to significant deformation,which will cause tunnel collapse and damage to surrounding buildings and facilities,resulting in serious loss of life and property,and subsequently causing significant social impact.Taking the Memorial Hall Station in a complex environment as the object of construction risk discussion,a reasonable design and construction plan was adopted to reduce construction risks,while increasing geological exploration,deep grouting,and construction monitoring methods to achieve good results.The hidden excavation station in weak strata was analyzed and summarized,providing a basis for the construction safety of the hidden excavation station.
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