Based on the complex geological conditions of high drilling penetration rate and strong karst development,in order to solve the technical shortcomings of large hole layout engineering and poor detection effect on cave connectivity and filling dur-ing advanced drilling detection of karst caves,and to reduce the construction risks of leakage,hole collapse,hanging drilling,and stuck drilling caused by inaccurate cave detection and poor processing quality during pile foundation construction in karst areas,a hospital expansion project in Baiyun District,Guangzhou City introduced cross hole elastic wave CT detection and pipe wave detection technology for joint detection of complex karst areas,and used BIM technology to establish a composite model of cave foundation based on the joint detection results.Through technical practice,a new construction technology for comprehensive cave detection and BIM modeling analysis was explored.Other similar projects provide design and construction references.
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