Abstract:The karst in the limestone area of North Guangdong is strongly developed and mostly belongs to the concealed karst. Selection of treatment methods for pile foundation in karst area will restrict the economic rationality of pile foundation design and construction. Combined with the regional topographic and geological conditions, and the regional structure construction conditions in the strong development area of concealed karst, the adaptability of treatment methods for pile foundation in the karst area is analyzed. The comparisons find that the chemical grouting method can enhance the integrity of soft overburden, and the stable consolidating body is formed in the karst cave area. The pile foundation meets the conditions of hole formation for construction, and has the high practicability and good economy. The practical case of treating the construction defects of pile foundation shows that the chemical grouting reinforcement scheme is reasonably practicable, and the grouting effect finally achieves the desired objective.
