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连霍高速郑州至洛阳段建于1995年,现需要把双向四车道改建为双向八车道。道路沿线地形复杂,长陡纵坡较多,且重载货车比例较高,路面结构及桥涵构造物病害严重。经分析论证,采用平原微丘区单侧整体式加宽、重丘区分离式路基加宽的改扩建方案。重点阐述了单侧整体式加宽过程中新旧路基间距确定、通行构造物净空保证措施、旧路路拱处理、旧路中央分隔带处理等关键技术问题及其解决措施。
Even Huo Expressway from Zhengzhou to Luoyang was built in 1995, it is necessary to rebuild two-way four-lane two-way eight lanes. The terrain along the road is complicated with long and steep slopes, and the proportion of heavy goods vehicles is high. The pavement structure and bridge and culvert structures are seriously ill. The analysis and demonstration, the use of plain monolithic monolithic widening, heavy hill area separation of roadbed widening of the expansion program. The key technical problems such as the determination of distance between old and new subgrade, the guarantee of clearance of prefabricated structures, the treatment of old road arching and the treatment of the central divider of old road, and their solutions are mainly discussed.