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随着我国高速公路向西部山区的发展,路侧多为傍山临谷、高陡边坡、深洼地等危险度较高的地形,对于这样的特殊路段,应采用高防护等级护栏进行防护。开发的HA级特高等级钢护栏为目前国内防护等级最高的护栏,由上部钢结构、下部混凝土基座和座椅式基础组成。因结构设计和造型新颖,其加工方法和施工工艺与普通钢护栏有一定区别。通过修建50m长护栏试验段,对加工和施工的工艺进行研究。
With the development of the expressway in our country to the western mountainous area, most of the roadsides are mountainous terrain, high steep slope and deep depression. For such special sections, the guardrail with high protection grade should be adopted. Developed HA grade extra high grade steel fence for the current highest level of protection of the fence, the upper steel structure, the lower part of the concrete base and seat-based composition. Due to structural design and novel modeling, its processing methods and construction techniques and ordinary steel fence have a certain difference. Through the construction of 50m long guardrail test section, the processing and construction process are studied.