Cong trinh Cua Dat co ap dung sai tieu chuan

Tags: Cua Dat, Viet Nam, tieu chuan xay dung, cong trinh tam thoi, tan suat lu, theo tieu chuan, ap dung cho, duoc ap dung, thiet ke, nguyen nhan, don vi, dan dong, thu truong, su co, 5%


Tu don vi tu van thiet ke den Thu truong Bo NN&PTNT Nguyen Ngoc Thuat deu khang dinh, cong trinh Cua Dat duoc ap dung theo tieu chuan xay dung Viet Nam 285 (voi tan suat lu 5%) va day chinh la nguyen nhan gay nen su co.

>> Su co Cua Dat chua the ket luan!

>> Cong trinh Cua Dat co chiu suc ep tien do?

Tuy nhien theo Tieu chuan xay dung 285:2002 (TCXD) lai noi ro: tan suat 5% chi ap dung cho cong trinh de quai va kenh dan, ma khong he co mot dong nao noi ve cong trinh dap da do nhu nguoi co trach nhiem phat bieu. Su that the nao?

Lay tieu chuan de quai, kenh dan ap dung cho dap da?

Tai muc 4.2.6 (TCXD 285: 2002) thi luu luong nuoc lon nhat de thiet ke cac cong trinh tam thoi phuc vu cong tac dan dong de quai, kenh dan duoc xac dinh theo cac quy dinh cu the.

Theo do, tan suat luu luong, muc nuoc lon nhat de thiet ke cong trinh tam thoi phuc vu cong tac dan dong (tinh theo %), thi doi voi cong trinh cap 1 (Cua Dat thuoc cong trinh cap 1 - PV), tan suat trong mot mua kho la 10%, tren hai mua kho la 5%.

Ong Phan Van Thuat, nguyen Cuc truong Cuc Quan ly xay dung cong trinh (thanh vien to cong tac ve su co Cua Dat), noi voi DT, tan suat lu ap dung tai dap tran da do Cua Dat la theo muc 4.2.6 cua tieu chuan 285 nay.

Va nhu vay, can cu theo tieu chuan nay, don vi thiet ke da ap dung tan suat lu voi 5% (tuong ung 5.050m3/s) cho dap Cua Dat. Cac khang dinh truoc do cua nhung nguoi co trach nhiem cung cho rang, viec ap dung tan suat do la dung, khong co gi phai thac mac.

Nhieu nguoi dat ra cau hoi, tan suat lu 5% cho dap Cua Dat khong co su khac biet so voi tan suat lu ap dung cho de quai, kenh dan. Phai chang don vi co trach nhiem da “sao y ban chinh” tieu chuan nay de ap dung cho mot cong trinh tuong tu?

Ong Tran Nhon, nguyen Thu truong Bo Thuy loi noi rang, viec ap dung tan suat cua kenh dan, de quai vao dap da do tai cong trinh Cua Dat theo TCVN 285 cua co quan chuc nang nhu vay la sai. Mac du day chi la thong tin mang tinh chat tham khao nhung cong luan van dang cho mot su giai thich tu Bo NN&PTNT ve dieu nay?

Xem xet lai mot so yeu kem trong cong trinh Cua Dat

Cho den luc nay, van chua co ket luan chinh thuc ve su co dap Cua Dat, moi ket luan lien quan deu phai cho vao bao cao cua to cong tac do Bo NN&PTNT lap truoc do.

Trong khi do, theo thong bao cua to cong tac, de co can cu phan tich va danh gia nguyen nhan su co, trach nhiem cua cac don vi, ca nhan lien quan thi can xem xet lai toan bo du an, bien phap dan dong thi cong qua cac mua lu, kem theo ket qua tinh toan thuy van, thuy luc va thi nghiem mo hinh.

Ong Phan Van Thuat cho biet, nguyen nhan xoi lo vua qua la do tan suat lu vuot qua tieu chuan nhung ben canh do phai xem xet lai mot so van de con yeu kem trong nhung khia canh khac nhau.

Theo ong Thuat, viec can lam bay gio la phai tim xem xoi tu cho nao, thoi diem xoi, vi sao lai xoi lon the? “Tat nhien su co la do lu, nhung lu den dau, nhu the nao thi phai phan tich that ky. Theo toi lu vuot tan suat la nguyen nhan chinh nhung khong phai la nguyen nhan toan bo”.

Trong lan tra loi DT moi day, Thu truong Bo NN&PTNT Nguyen Ngoc Thuat noi rang, viec ap dung tan suat lu phai theo quy trinh, quy pham. Theo Thu truong, neu xac dinh theo quy pham 285 thi tan suat chi la 10% nhung day la cong trinh quan trong nen phai nang len 5% ma van chua dap ung duoc.

Tuy nhien, phan chu thich cua quy pham 285 quy dinh ve luu luong muc nuoc lon nhat de thiet ke cac cong trinh tam thoi phuc vu cong tac dan dong, noi ro: Nhung cong trinh phai thi cong nhieu nam, khi co luan chung chac chan neu thiet ke voi tan suat neu tren (tuc 5% - PV) co the gay thiet hai cho phan cong trinh chinh da xay dung va ton that ve nguoi, tai san vat chat ha luu lon hon dang ke so voi phan dau tu them cho cong trinh dan dong thi co quan thiet ke phai kien nghi tang them muc bao dam cho cong trinh nay.

Cau hoi dat ra, lieu phuong an dan dong Cua Dat voi tinh toan luu luong lu 5% thi da hop ly chua, neu ap dung 5% thi tu van thiet ke co tinh den nhung dieu nhu phan chu thich cua quy pham nay da neu?

Tran Hung

Viet Bao

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Tìm hiểu: Cua Dat, Viet Nam, tieu chuan xay dung, cong trinh tam thoi, tan suat lu, theo tieu chuan, ap dung cho, duoc ap dung, thiet ke, nguyen nhan, don vi, dan dong, thu truong, su co, 5%

Xem Bản Tiếng Việt Có Dấu: Công trình Cửa Đạt có áp dụng sai tiêu chuẩn?

Ban co the doc ban tieng Viet co dau cua bai viet Công trình Cửa Đạt có áp dụng sai tiêu chuẩn? bang cach nhan chuot vao duong dan tren.

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