丁坝与挡土墙配合防护沿河公路路基机理分析

Analysis of Combination of Spur Dike and Retaining Wall for Scour Protection to Highway Subgrade Along River Bends

摘要:

山区沿河公路常由于弯道水流冲刷而发生水毁.为进一步认识丁坝和挡土墙配合这一沿河路基水毁防治方案的防护机理,采用现代三维运动界面追踪技术VOF(volume of fluid)方法和标准k-ε模型耦合求解,对圆心角为90°弯道中设置丁坝的三维流场进行了分析研究,指出丁坝和挡土墙配合防护沿河路基是通过改变弯道水流的流场结构,使水流偏离被防护的路基或将冲刷区变为淤积区,从而达到冲刷防护目的的.

关键词:路基;冲刷防护;流场;丁坝;挡土墙;配合;沿河路基;公路路基;机理分析;River;Subgrade;Highway;Scour Protection;Retaining Wall;Spur Dike;Combination;冲刷防护;流场结构;弯道水流;研究;三维流场;设置;圆心角;耦合求解

Abstract:

Key words:路基;冲刷防护;流场;丁坝;挡土墙;配合;沿河路基;公路路基;机理分析;River;Subgrade;Highway;Scour Protection;Retaining Wall;Spur Dike;Combination;冲刷防护;流场结构;弯道水流;研究;三维流场;设置;圆心角;耦合求解