复杂控制因素下的桥梁改扩建路线方案研究——以巫山龙门复线桥为例

Study on Route Scheme of Bridge Reconstruction andExpansion under Complex Control Factors——Taking Wushan Longmen Double-track Bridge as an Example

巫山龙门大桥位于小三峡峡口处,连接巫山江东新城和老城区。为了解决现状龙门桥及两侧引道存在道路平纵指标差、通行能力不足及常态化拥堵等问题,依托巫山龙门复线桥的设计,剖析了在复杂控制因素下桥梁改扩建设计主要的技术难点,通过综合比选后得到了最优路线方案,龙门复线桥修建后可有效改善道路平纵指标,提升道路通行能力及缓解现状龙门桥拥堵状况。

Wushan Longmen bridge is located at the mouth of the Xiaosanxia Gorge,connecting Wushan Jiangdong new city and the old urban area.In order to solve the problems of poor road horizontal and vertical indicators,insufficient traffic capacity,and normalized congestion in the current Longmen bridge and its approach roads,this article relies on the design of the Wushan Longmen double track bridge to analyze the main technical difficulties in route design under complex geological conditions.After comprehensive comparison and selection,an optimal route design scheme is obtained.After the construction of the Longmen double track bridge,the road horizontal and vertical indicators and the road capacity can be effectively improved,and the current congestion situation of Longmen bridge can be alleviated.