Research on Technical Measures for Pile Foundation Construction in Tidal and Karst Regions
Taking the pile foundation construction of the karst development block of the Kangsheng Garden Project in Zhaoqing New District as an example,this paper focuses on the pile foundation construction technology under the condition of tidal changes in water level.In response to the'tidal'changes in the water level of pile foundations in karst developed areas,which cause erosion of the mud protection wall of the pile foundation,difficulty in forming the mud protection wall,severe soil erosion,repeated collapse caused by disturbance during pile foundation construction,and unstable flow velocity after filling the karst cave,the electromagnetic wave cross hole CT detection technology is used to detect the karst cave,strengthen the observation of the 'tidal' water level,and reinforce the soil within the operation range through grouting,multiple auxiliary technical measures such as multi-layer steel casing follow-up and the use of gas lift reverse circulation method for pile foundation hole cleaning have successfully solved the related problems of pile foundation hole formation in areas with tidal water level changes and karst development,ensuring engineering quality and construction safety,enriching construction experience,and having good reference significance for similar construction projects.
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