城市道路 T 形交叉口立交方案研究与设计

Research and Design of Interchange Scheme for Urban Road T-intersection

摘要:

以东莞市福海路立交为例，采用列举法，通过综合分析项目概况、功能定位，同时结合实际交通量数据及周边用地的限制，研究了城市道路T形交叉口立交方案的选取过程。研究表明：当对线形指标要求较高，且用地用海受限制时，推荐采用B形喇叭立交；当拓宽桥梁不受限时，考虑平纵指标及用地用海，可选取A形喇叭立交；当用地不受限时，可选取平纵指标最好的梨形立交；当主线设置分离式主路及辅道时，可选取半苜蓿叶形立交；当用地非常受限时，可局部牺牲立交线形和平纵指标，采取限制速度的方案，选用迂回型立交。研究结果可为类似的城市立交设计提供方案借鉴和经验。

Abstract:

Taking Fuhai Road Interchange in Dongguan as an example, the selection of interchange scheme for urban road T-intersection is specially studied. The enumeration method is used to compare and select the optimal interchange scheme by comprehensively analyzing the project overview, functional orientation and also combined with the actual traffic flow data and the surrounding land restriction. The study shows that when the requirements for line type index are high and the land use and sea use are limited, the B-type horn interchange is recommended. When the widening bridge is not limited, considering the horizontal and vertical indicators and land and sea use, the A-type horn interchange can be selected. When the land is unlimited, the pear-shaped interchange with the best horizontal and vertical indicators can be selected. When the main line is provided with the separated main roads and auxiliary roads, the semi-alfalfa-leaf interchange can be selected. When the land is very limited, the interchange line type and horizontal and vertical indicators can be locally sacrificed, and the scheme of limiting the speed can be adopted, the roundabout-type interchange can be selected. The study results can provide the reference and experience for the design of similar urban interchanges.