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挡墙倾倒和路面沉陷是山区公路填方路基中比较常见的公路病害。笔者以G317国道K842+980～K843+100段为研究对象,根据填方路基结构及变形破坏特征,分析评价挡墙倾倒、路面沉陷的原因,结合数值模拟方法,预测其稳定性状况。研究表明:挡墙倾倒、路面沉陷主要是由车载动压力和墙后土压力的长期作用形成的,挡墙的高度越高,越易产生破坏。针对该段变形特点,采取了锚杆加固和路面夯填的治理措施。
Retaining walls and pavement subsidence are the most common road diseases in mountainous roadbed. Taking G817 national highway K842 + 980 ~ K843 + 100 as the research object, the author analyzes and evaluates the reason of the falling of the retaining wall and the subsidence of the road according to the subgrade structure and the deformation and failure characteristics of the fill road, and predicts the stability status by combining the numerical simulation method. The research shows that: the retaining wall is dumped and the road surface subsidence is mainly caused by the long-term effect of the dynamic pressure of the vehicle and the earth pressure behind the wall. The higher the height of the retaining wall, the easier it is to cause damage. Aiming at the deformation characteristics of this section, the measures of reinforcement by bolting and pavement compaction are adopted.