Cơ chế thất bại của một trận lở đất phá hủy tại làng Hosein Abad Kalpush, Semnan, Iran

Arabian Journal of Geosciences - Tập 16 - Trang 1-16 - 2023
Ali Lashgari1,2, Abdolhosein Haddad1
1Department of Civil Engineering, Semnan University, Semnan, Iran
2International Institute of Earthquake Engineering and Seismology, Tehran, Iran

Tóm tắt

Một trận lở đất phá hủy đã xảy ra vào mùa xuân năm 2019, tại làng Hosein Abad Kalpush, đông bắc Iran, sau một khoảng thời gian mưa bất thường. Những thiệt hại đáng kể đã được quan sát thấy ở các công trình và đường giao thông nằm trong vùng xảy ra lở đất. Bài báo này trình bày một báo cáo khảo sát ban đầu được chuẩn bị thông qua chuyến thăm hiện trường do tác giả thực hiện, chỉ vài ngày sau khi sự cố lở đất xảy ra. Sau đó, các thuộc tính địa kỹ thuật và địa vật lý của khu vực lở đất được báo cáo thông qua các thử nghiệm khảo sát hiện trường. Tiếp theo, dữ liệu về mưa được bổ sung cho các phân tích độ ổn định của sườn dốc. Nghiên cứu này cho thấy sự thay đổi của cơ chế thất bại của sườn dốc trước và sau khi có mưa. Các kết quả xác nhận rằng hệ số an toàn giảm 1.78 lần sau khoảng thời gian 3 tháng mưa với cường độ mưa khoảng 6 lần so với mức trung bình lâu dài. Cuối cùng, hiệu quả của hai chiến lược cải thiện độ ổn định sườn dốc được đánh giá nhằm giảm thiểu rủi ro lở đất. Kết quả của nghiên cứu có thể cung cấp một cái nhìn tổng quát về tác động của biến đổi khí hậu ở Iran đối với các thiết kế hệ sinh thái trong tương lai, dự đoán địa nguy hiểm và lựa chọn các chiến lược giảm thiểu lở đất do mưa.

Từ khóa

#lở đất #cơ chế thất bại #độ ổn định sườn dốc #khảo sát địa kỹ thuật #ảnh hưởng của khí hậu #Iran

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