TCVN 9437:2012 – Khoan thăm dò địa chất công trình
TCVN 9437:2012 – Khoan thăm dò địa chất công trình
Khoan khảo sát địa chất công trình được thực hiện theo TCVN 9437:2012 – Khoan thăm dò địa chất công trình
TCVN 9437: 2012 được chuyển đổi từ 22 TCN 259-2000 theo quy định tại khoản 1 Điều 69 của Luật Tiêu chuẩn và Quy chuẩn kỹ thuật và điểm a khoản 1 điều 7 Nghị định số 127/2007/NĐ-CP ngày 1/8/2008 của Chính phủ quy định chi tiết thi hành một số điều của Luật Tiêu chuẩn và Quy chuẩn kỹ thuật.
Tiêu chuẩn khoan khảo sát địa chất công trình hướng dẫn cụ thể từ công tác chuẩn bị khoan khảo sát địa chất, xác định vị trí các hố khoan, công tác lấy mẫu, quy định về biểu mẫu ghi chép, cách thức nghiệm thu mẫu, nghiệm thu hiện trường và nghiệm thu thanh lý hợp đồng.
TCVN 9437:2012 thể hiện chi tiết các nội dung sau
1. Phạm vi áp dụng
2. Tài liệu viện dẫn
3. Thuật ngữ và định nghĩa
4. Nguyên tắc chung
5. Chuẩn bị trước khi khoan
6. Xác định vị trí và cao độ miệng lỗ khoan
7. Làm nền (sàn) khoan và lắp ráp thiết bị khoan
8. Khoan trên sông nước
9. Quy định về phương pháp khoan
10. Nâng hạ dụng cụ khoan
11. Gia cố thành lỗ khoan – chống mất nước và ngăn nước trong lỗ khoan
12. Theo dõi, đo đạc và ghi chép trong quá trình khoan
13. Lấy mẫu đất, đá, nước
14. Công tác kết thúc lỗ khoan
Phụ lục A (Quy định): Bản thiết kế lỗ khoan
Phụ lục B (Quy định): Bản ghi kết quả xác định vị trí và cao độ lỗ khoan
Phụ lục C (Quy định): Xác định độ dốc ta luy nền khoan
Phụ lục D (Quy định): Phân cấp đất đá theo độ khoan
Phụ lục E (Quy định): Phân loại hạt (hòn) theo kích thước
Phụ lục G (Quy định): Những dấu hiệu để xác định tên đất ở hiện trường
Phụ lục H (Quy định): Xác định trạng thái và tính chất của đất tại hiện trường
Phụ lục I (Tham khảo): Hướng dẫn ghi chép nhật ký khoan và mẫu của nhật ký khoan
Phụ lục K (Tham khảo): Các loại phiếu mẫu
Phụ lục L (Tham khảo): Biên bản sự cố lỗ khoan và giải quyết sự cố lỗ khoan
Phụ lục M (Tham khảo): Biên bản lấp lỗ khoan
Phụ lục O (Tham khảo): Quan trắc và ghi chép mực nước trong lỗ khoan
Phụ lục P (Quy định): Tiêu chuẩn kỹ thuật của ống mẫu thành mỏng
Phụ lục Q (Quy định): Tiêu chuẩn dụng cụ xuyên SPT
Phụ lục R (Tham khảo): Tiêu chuẩn chủ yếu của các loại cần và ống khoan
Phụ lục S (Tham khảo): Công thức tính toán neo và kéo phương tiện nổi
Phụ lục T (Tham khảo): Trang bị máy móc, dụng cụ và vật liệu tiêu hao dùng cho lấy mẫu, đo đạc và ghi chép
Phụ lục U (Tham khảo): Đề phòng và giải quyết sự cố trong lỗ khoan
Phụ lục V (Tham khảo): Kích thước tối thiểu của nền (sàn) khoan, khi khoan thẳng đứng
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