Optimization method of urban express route shape design under ice and snow conditions
An optimization method and conditional technology, applied in computing, instrumentation, electrical digital data processing, etc., can solve problems such as proposing corresponding algorithms and theoretical research
Active Publication Date: 2018-02-02
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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[0004] Reasonable determination of the above parameters is the key to solving the impact of ice and snow roads on expressways. Judging from the current research situation, no one has proposed corresponding algorithms and theoretical studies for the determination of the above parameters, and there is no relevant research in actual engineering. channelized design method
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[0045] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0046] Most areas in the north are affected by snowfall, snow, and freezing in winter, and their urban road traffic systems are greatly affected. In severe cases, ice and snow even block the entire urban traffic. Compared with normal conditions, traffic accidents occur more frequently; ice and snow The reduction of the road surface adhesion coefficient restricts the driving state of the car, which makes it difficult to give full play to the performance of the car. Therefore, it is necessary to study the design index of the longitudinal slope section of the urban expressway under ice and snow conditions, and put forward the corresponding design index suggestion value. It provides a reference for the design of urban express routes in snowy areas. This theoretical system can fill the gap in the field of necessa...
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The present invention provides a method for optimizing the shape design of urban express routes under ice and snow conditions, including the optimization of the following parameters: 1) the maximum slope length parameter under ice and snow conditions; 2) the maximum slope parameter under ice and snow conditions; 3) the limit of circular curves under ice and snow conditions minimum radius. The present invention has the following advantages: propose the maximum longitudinal slope of the urban expressway under ice and snow conditions, the value of the design index value of the maximum longitudinal slope slope length and the suggested reference value of the minimum parking sight distance, standardize the minimum limit radius of the circular curve and the maximum superelevation rate, etc. Geometric parameters; provide more detailed geometric index value reference for expressway designers in ice and snow areas, which is of great practical significance to promote safe production and economic development in northern ice and snow.
Description
technical field [0001] The invention belongs to the field of urban expressway design in ice and snow environment, in particular to an urban expressway design optimization method under ice and snow conditions. Background technique [0002] Ice and snow not only reduce the adhesion coefficient of the expressway road surface, but also lead to the decline of the vehicle's dynamic performance, increase the probability of skidding and sideslip of the vehicle, and increase the parking sight distance of the vehicle, making the possibility and danger of rear-end collision and loss of control of the vehicle The increase seriously threatens the safety of expressway traffic, greatly weakens the traffic capacity of urban expressways in cold regions, and has a serious impact on expressway traffic safety and operating efficiency. Ice and snow are an important factor that seriously affects the traffic capacity of urban expressways. Early domestic research on it mainly focused on the snow di...
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IPC IPC(8): G06F17/50
Inventor 练象平李明剑狄升贯王志华陈永恒刘润有王晓华罗昊冲史庆春周骊巍高立鑫宋现敏胡宏宇曹宁博白乔文
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST