中文摘要：

高速公路护栏是机动车驾驶员生命保障工程设施，但是由于路面养护使路面标高提高，护栏的高度就不能满足安全的要求，为了提高高速公路的安全性，通过实际调研，结合交通工程学、工程力学等理论，分析护栏立柱的在荷载作用下的变形和应力情况，通过平行试验法确定了护栏立柱加高段的设计参数，并实际验证了其合理性，为高速公路养护带来的设施改造提出一种新的思路。

英文摘要：

Highway guardrail is motor vehicle driver life support facilities, but because the pavement maintenance to improve pavement elevation, the height of the fence can not satisfy the safety requirements, in order to improve highway safety, through the actual investigation, combined with the project of traffic engineering, capacity theory analysis under loaddeformation and the stress of the guardrail post through the parallel test method,the design parameters of guardrail posts a heightening segment was determined, and the actual verified the rationality, the reconstruction of facilities bring to expressway maintenance of a new train of thought.