Đánh giá cường độ chịu uốn và chịu nén của trụ đất xi măng đối với đất sét dẻo mềm

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Tác giả: VĂN ĐẸT ĐOÀN, QUỐC TIẾN LÊ, THỊ THU HẰNG LÊ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.138

Bộ sưu tập: Metadata

ID: 452062

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This paper presents the results of research on cement content and reasonable water/cement ratio of 15% and ≤ 1.0, respectively. With the amount of cement, this optimal water/cement ratio, the ratio between the functional strength and compressive strength has values from 0.45 to 0.57. Depending on the cement content and the water/cement ratio, the ratio between the bearing strength and the compressive strength ranges from 0.36 to 0.84 based on the equivalence assessment between the bearing strength and the tensile strength. compressive strength compressive strength of soil-cement mixtures for ductile soils. In addition to depending on the cement content, the strength also depends on the water/cement ratio. The study was conducted through the stress strength test on the standard sample. The sampling process was carried out in the room according to the fusion method when changing the cement content by 5%, 10%, 15% and 20%, respectively. For each cement content, the water/cement ratio will be changed to 0 values respectively
0.5
1.0
1.5 and 2.0. Research results are the basis for designers to choose reasonable bending resistance parameters, both ensuring technical and economic factors and ensuring favorable factors in the construction process. Keywords: Soft soil
deep cement mixing piles
cement soil mixed
water/cement ratio
cement content
bending resistance of cement column.Thực nghiệm trình bày kết quả nghiên cứu hàm lượng XM và tỷ lệ N/XM hợp lý tương ứng là 15% và ≤ 1,0
0,45 đến 0,57 là tỷ số giữa cường độ chịu uốn và cường độ chịu nén tương ứng. Tỷ số giữa cường độ chịu uốn và cường độ chịu nén từ 0,36 đến 0,84 dựa trên đánh giá mối quan hệ giữa cường độ chịu nén và cường độ chịu uốn của hỗn hợp XM đất đối với loại đất sét dẻo mềm phụ thuộc vào hàm lượng XM và tỷ lệ N/XM. Nghiên cứu được tiến hành thực nghiệm trên mẫu tiêu chuẩn đánh giá cường độ chịu uốn. Mẫu được chế bị trong phòng theo phương pháp trộn ướt, 5, 10, 15 và 20% lần lượt là hàm lượng XM được thay đổi. Tương ứng với mỗi hàm lượng XM, tỷ lệ N/XM thu được các giá trị thay đổi lần lượt là 0
0,5
1,0
1,5 và 2,0. Kết quả thực nghiệm là cơ sở lựa chọn thông số sức kháng uốn hợp lý, kinh tế, đảm bảo kỹ thuật và dễ dàng khi thi công. Từ khóa: Nền đất yếu
trụ đất xi măng
hỗn hợp xi măng đất
tỷ lệ nước/xi măng
hàm lượng xi măng
khả năng chịu uốn của trụ đất xi măng
sét dẻo mềm.

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