Intelligent optimization of the structure of the large section highway tunnel based on improved immune genetic algorithm

As in the building of deep buried long tunnels, there are complicated conditions such as great deformation, high stress, multi-variables, high non-linearity and so on, the algorithm for structure optimization and its application in tunnel engineering are still in the starting stage. Along with the rapid development of highways across the country, It has become a very urgent task to be tackled to carry out the optimization design of the structure of the section of the tunnel to lessen excavation workload and to reinforce the support. Artificial intelligence demonstrates an extremely strong capability of identifying, expressing and disposing such kind of multiple variables and complicated non- linear relations. In this paper, a comprehensive consideration of the strategy of the selection and updating of the concentration and adaptability of the immune algorithm is made to replace the selection mode in the original genetic algorithm which depends simply on the adaptability value. Such an algorithm has the advantages of both the immune algorithm and the genetic algorithm, thus serving the purpose of not only enhancing the individual adaptability but maintaining the individual diversity as well. By use of the identifying function of the antigen memory, the global search capability of the immune genetic algorithm is raised, thereby avoiding the occurrence of the premature phenomenon. By optimizing the structure of the section of the Huayuan tunnel, the current excavation area and support design are adjusted. A conclusion with applicable value is arrived at. At a higher computational speed and a higher efficiency, the current method is verified to have advantages in the optimization computation of the tunnel project. This also suggests that the application of the immune genetic algorithm has a practical significance to the stability assessment and informationlzation design of the wall rock of the tunnel.     

海船进出内河航道发生碰撞原因分析及预防措施研究

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滨水地区的道路规划往往最能够集中体现一个城市的发展水平和城市文明的程度。所以,滨水地区的道路规划必须综合分析道路的交通、景观功能,并从道路平、纵、横三个方面,以及按照道路的空间、组合和艺术美的要求来规划设计,力图将城市滨水地区的道路规划建设成为最能体现出城市形象的精品。     

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本文通过分析肇庆市现状地形、地貌 ,对肇庆城区的水环境现状做了综合分析 ,并依据排水系统规划 ,对水系规划及景观建设做了初步论述     

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介绍国内外区域性河流系列桥梁景观案例,并以城市新区内某河流桥梁景观规划设计为例,分析在桥梁景观规划上需考虑的因素,探讨同河流上桥梁景观规划原则和设计思想,总结出有指导意义的结论。     

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城市管线过河方案设计探讨

通过介绍目前城市管线过河的常用方法,并进行对比分析,得出安全、合理和经济的管线过河方案,可为实际工程提供参考。     

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加筋土挡墙是目前应用较为广泛的一种新型挡土结构,但在工程应用过程中也存在一些问题。结合沿河路基工程特点,介绍了复合加筋土挡墙在重庆城口至陕西岚皋二级公路改建工程中的设计施工情况,并对结构进行了适宜性分析,为类似工程建设提供参考。