公路改河工程及相应的防冲刷研究

River Realignment in Highway Engineering and Corresponding Anti-erosive Research

河流改道是对河道进行裁弯取直使河道变直变短,进而加大河床的坡降,河水流速加大。河水流速加大就会产生河床的冲刷,导致河床降低,沿河路堤墙、护岸墙等墙体基础被淘空,导致墙体倒塌。此外,公路建设中,也还存在拦砂坝的下游冲刷、拦砂坝与岸坡的交接及护岸工程与天然河岸的交接处的冲刷、旱桥下的冲刷等问题。针对这些问题研究了应采取的措施。

Because of the straightening and shortening in river realignment, the water head and flowing speed increases and it leads to the occurence of erosion and deposition in the riverbed, cave-in in the (embankment) and collapse of the protective wall. Furthermore, during highway construction there existed other outstanding issues such as the erosion in downstream of a dam, the erosion under a dry bridge, the (erosion) at the joint of a sand-sediment dam and the bank slope as well as at the joint of a protective project and the river embankment. In this paper, the protective measures related to above-mentioned problems are (investigated.)