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Công nghệ thi công hạ cọc ống thép

Phương pháp thi công là hạ cọc bằng cách đưa lưỡi khoan vào và xoay trong cọc ống thép hoặc ống thép cuộn, đất cát ở đầu cọc vừa được khoan thải ra liên tục vừa dưới phản lực của trọng lượng máy đóng cọc bằng hệ thống đẩy thuỷ lực hình cánh cổng sẽ đảy cọc vào vị trí qui định.

Sau đó từ phần đáy cọc vữa sẽ được phun ra với áp suất từ 20 - 24MPa tạo ra bầu lớn, cứng ở phía đáy cọc. 

Ưu việt của phương pháp này là sự độc lập của hai hệ thống ép cọc và hệ thống quay cánh khoan khi thi công trong ống thép.

Ngoài ra phương pháp thi công này còn có ưu điểm là giảm thiểu tiếng ồn và chấn động, không gây hậu quả về môi trường (phát sinh ra ít nước, bùn và rất ít chất thải).

 

 

Sơ đồ trình tự thi công hạ cọc ống thép bằng công nghệ khoan ép

 

Thi công hạ cọc ống thép

 

 

Cọc ống thép

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