Nghiên cứu chống thấm cho đập đất và nền vằng mảng chống thấm HDPE

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Tác giả: Thị Huệ Lê

Ngôn ngữ: Vie

Ký hiệu phân loại: 624 Civil engineering

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Lâm nghiệp, 2020

Mô tả vật lý: 129-135

Bộ sưu tập: Metadata

ID: 394429

Thêm vào giỏ Liên kết toàn văn

Từ thực tế thiết kế, thi công, sử dụng và khắc phục sự cố, có thể thấy sự cố đập đất thường có các dạng như: sự cố mất ổn định về thấm phát triển trong nền và thân đập gây vỡ đập, sạt mái thượng lưu, sạt mái hạ lưu, tràn nước qua đỉnh đập và vỡ đập bắt nguồn từ sự cố các công trình khác. Một trong những nguyên nhân chính gây ra là do dòng thấm trong thân đập và nền. Với loại công trình đầu mối này đã tồn tại rất nhiều hình thức chống thấm, chúng khác nhau về vật liệu và giải pháp công trình. Bài viết giới thiệu vật liệu mới chống thấm cho thân đập và nền đặc biệt với nền thấm mạnh và tầng thấm dày đó là màng chống thấm HDPE. Đồng thời nghiên cứu sự phụ thuộc của chiều dài sân phủ vào 2 yếu tố là hệ số thấm của nền và chiều dày tầng thấm từ đó đó tạo cơ sở khoa học trong việc lựa chọn chiều dài sân phủ (chiều dài màng chống thấm HDPE) cũng như biện pháp chống thấm cho đập và nền hợp lý về mặt kinh tế và kỹ thuật., Tóm tắt tiếng anh, From the actual design, construction, use and troubleshooting, it can be seen that the earth dam incident often takes the form of instability problems developed in the foundation and the dam body causing dam break and roof collapse. Upstream, downstream slope, overflow over the top of the dam and dam break originated from incidents of other works. One of the causes is the seepage current in the dam body and the foundation. With this type of focal building already exists many forms of waterproofing, they differ in construction solutions and materials. The article introduces new waterproofing material for the dam body and the special foundation with strong and thick permeable floors that is HDPE waterproofing membrane. At the same time, studying the dependence of the length of the covered yard on two factors, the permeability coefficient of the ground and the thickness of the permeable floor, thereby creating a scientific basis in choosing the length of the covered yard as well as waterproofing measures for dams, and economically and technically sound.

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