沿河道路布置形式及交通组织方式研究

Study on Layout Form and Traffic Organization of Riverside Road

摘要:

利用钢梁与混凝土的组合性能优势和技术，将市政快速路大跨径简支预制板组合梁方案优化设计为叠合板组合梁桥面体系，新方案实现桥梁结构高度降低17.3%，用钢量降低20.2%。优化方案有限元模型验算结果显示，在最不利工况荷载下，边梁抗弯最不利应力为162 MPa，混凝土最不利压应力为-14.2 MPa；中梁抗弯最不利应力为165 MPa， 混凝土最不利压应力为-13.8 MPa； 边梁挠度39.3 mm， 挠跨比为1/1 399，中梁挠度36.6 mm， 挠跨比为1/1 503，均满足设计规范要求。成桥静力载荷试验结果显示，在公路-I级荷载水平下，结构最大挠度值为17 mm，最大挠跨比为1/3 235，最大压拉应力值为24.68 MPa，最大压应力值为50.16 MPa，远小于Q345钢材应力设计值，桥梁结构性能满足规范要求

Abstract:

Aiming at the contradiction of river not only enhancing the road landscape, but also forming the partition of the road traffics at both banks, combined with the different situations of river and roads at both banks, two layout forms of riverside road are introduced. Through the analysis and study on the factors influencing the layout forms and traffic organization modes of riverside roads, the conclusion is obtained that the "one-river and two-road" form of double-way traffic of roads at both banks is suitable to use for the riverside roads at the wider side of river, and the "one-river and two-road" form of one-way traffic of roads at the both banks or the type of combining the roads at both banks into "one river and one road" should be used for the more narrow riverside roads at the side of river because of the road length at the connection not able to meet the minimum spacing of intersection. At the same time, the technical problems at the connection of roads on both banks in the middle of river and at the terminal of river are studied. The reasonable connection scheme is given.