Bài viết Nghiên cứu biện pháp tiêu năng dòng chảy trong thân cống dốc trên đường giao thông – biện pháp bố trí mố nhám gia cường trong thân cống trình bày chi tiết một số phương pháp tiêu năng trong thân cống dốc thường dùng. Từ đó phân tích các ưu điểm, nhược điểm của các phương pháp này. | Tạp chí Khoa học Giao thông vận tải Tập 73 Số 2 02 2022 140-153 Transport and Communications Science Journal ENERGY DISSIPATION IN HIGHWAY STEEP CULVERTS - EFFECTIVENESS OF ROUGHNESS ELEMENTS IN BOX CULVERTS Nguyen Dang Phong Hoang Thi Minh Hai University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 28 09 2021 Revised 09 11 2021 Accepted 12 11 2021 Published online 15 12 2021 https Corresponding author Email ndphong@ Abstract. In the hydraulic design of highway steep culverts in mountainous areas in Vietnam in addition of determining the size of culverts to drain the design discharge the design to dissipate part of the energy in the culvert body to reduce the size of the dissipators at downstream of the culverts is also considered. Currently there are two main solutions to dissipate energy in culvert bodies including 1- two unit broken -back culverts consist of steep slope section at upstream and mild slope section at downstream 2 - culverts in form of the straight drop structure. Besides in the world the solution of adding internal roughness elements throughout the culvert or chute or just prior to the outlet is also applied. In this article the author presents in detail some commonly used methods of energy dissipation in steep culverts. The advantages and disadvantages of these methods are also analyzed. In addition the results of empirical research on physical model with the high roughness elements in the downstream culvert performed at the Laboratory of Hydraulics Hydrology Departments University of Transport and Communications also presented. Keywords steep culverts dissipate energy broken -back culverts straight drop structure roughness elements. 2022 University of Transport and Communications 140 Transport and Communications Science Journal Vol 73 Issue 02 02 2022 140-153 Tạp chí Khoa học Giao thông vận tải NGHIÊN CỨU BIỆN PHÁP TIÊU NĂNG DÒNG CHẢY TRONG
