In the Shenzhen region,where strong karst development is widely distributed,karst caves pose significant difficulties and risks to pile foundation construction.This paper,based on the Yanba Expressway Municipalization...In the Shenzhen region,where strong karst development is widely distributed,karst caves pose significant difficulties and risks to pile foundation construction.This paper,based on the Yanba Expressway Municipalization Reconstruction Project and referencing previous engineering experiences,proposes the application of sleeve valve pipe grouting technology for pre-treatment of small-to medium-sized and bead-shaped karst caves.Specific implementation measures and construction precautions are presented.Practical results demonstrate that the pre-treated karst cave areas achieved stable soil conditions,providing favorable prerequisites for subsequent pile foundation construction.The method proves convenient and feasible in operation,substantially reducing safety and quality risks during construction.This successful practice offers valuable experience for similar projects.展开更多
文摘In the Shenzhen region,where strong karst development is widely distributed,karst caves pose significant difficulties and risks to pile foundation construction.This paper,based on the Yanba Expressway Municipalization Reconstruction Project and referencing previous engineering experiences,proposes the application of sleeve valve pipe grouting technology for pre-treatment of small-to medium-sized and bead-shaped karst caves.Specific implementation measures and construction precautions are presented.Practical results demonstrate that the pre-treated karst cave areas achieved stable soil conditions,providing favorable prerequisites for subsequent pile foundation construction.The method proves convenient and feasible in operation,substantially reducing safety and quality risks during construction.This successful practice offers valuable experience for similar projects.
