Phân tích lựa chọn chiều dày tường vây bê tông cốt thép cho hố đào sâu nhà cao tầng bằng phương pháp phần tử hữu hạn

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: NGỌC THẮNG NGUYỄN

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2023

Mô tả vật lý: tr.68

Bộ sưu tập: Báo, Tạp chí

ID: 339025

Thêm vào giỏ Liên kết toàn văn

In a densely populated urban area, constructing basement in highrise buildings with deep excavations can be very complex and can have negative impacts such as settlement, cracks or damage to the structure, or even pose safety during construction, affecting neighboring buildings. The reinforced concrete retaining wall, also known as a Diaphragm Wall or Barrette, is designed as a structural component as the basement wall when construction is completed. It is considered one of the most suitable solutions for stabilizing during excavation. Currently, the finite element method is widely used in simulating and calculating the structural design of diaphragm walls due to its stable results and compatibility with practical measurements. In this article, the author uses the Hardening Soil model in Plaxis 3D to investigate the impact of wall thickness on displacement and internal force distribution within the wall. The analytical results are applied to the project of a two-story basement at the Vietnam Academy of Social Sciences in Dong Da, Hanoi. Keywords: Diaphragm wall
excavation
finite element method
wall thicknessTrong không gian đô thị chật hẹp việc thi công tầng hầm nhà cao tầng có chiều sâu hố đào lớn, từ hai tầng hầm trở lên, rất phức tạp có thể gây ảnh hưởng xấu như lún, nứt hay hư hỏng kết cấu hoặc có thể gây mất an toàn trong thi công, làm ảnh hưởng tới công trình lân cận. Tường vây bê tông cốt thép, tên tiếng anh Diaphragm Wall hay tường Barrette được thiết kế là một bộ phận kết cấu công trình, là tường của tầng hầm khi thi công xong, được xem như một trong những giải pháp phù hợp nhất giữ ổn định cho hố móng trong giai đoạn thi công đào đất. Hiện nay phương pháp phần tử hữu hạn được sử dụng rộng rãi trong mô phỏng tính toán kết cấu tường vây vì cho kết quả ít biến động và phù hợp với quan trắc thực tế. Trong bài báo này, tác giả sử dụng mô hình toán Hardening Soil trong Plaxis 3D để khảo sát bài toán ảnh hưởng chiều dày tường vây tới chuyển vị và phân bố nội lực trong tường. Kết quả phân tích đượcáp dụng tính toán cho công trình hai tầng hầm, Viện Hàn lâm Khoa học xã hội Việt Nam, Đống Đa, Hà Nội. Từ khóa: Tường vây
hố đào sâu
phương pháp phần tử hữu hạn
chiều dày tường

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR