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Phân tích hiệu quả cọc có phụt vữa thân cọc bằng phương pháp load – transfer
Tóm tắt
Bài báo đề xuất một phương pháp đơn giản trong phân tích ứng xử của cọc có phụt vữa thân cọc cũng như đánh giá hiệu quả của cọc có phụt vữa thân cọc. Phương pháp đề xuất dựa trên nguyên lý của phương pháp load-transfer kết hợp với công thức xác định sức chịu tải thân cọc có phụt vữa thân cọc. Các trường hợp thử tải hiện trường của cọc khoan nhồi có đường kính lớn (có và không có phụt vữa thân cọc) ở thành phồ Hồ Chí Minh được đưa vào phân tích. Kết quả phân tích của phương pháp đề xuất được kiểm chứng với kết quả thử tải hiện trường. Với sự tương đồng giữa kết quả phân tích từ mô hình và kết quả thử tải hiện trường, bài báo mở rộng phân tích đánh giá ảnh hưởng của việc phụt vữa thân cọc đến sức chịu tải cọc có phụt vữa thân cọc khi cọc được thay đổi chiều dài và đường kính cọc. Kết quả và phương pháp tính của bài báo có thể là một tài liệu tham khảo tốt giúp người kỹ sư trong việc tính toán, thiết kế ban đầu khi sử dụng cọc có phụt vữa thân cọc
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