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一,引言选择桥梁方案,其根本目的是使桥梁整个结构体系的设计建立在科学的基础上。一个被公认的优秀的桥梁方案,必须是技术上的可行性、先进性同经济上的合理性、有利性的完美统一,而这样的方案决非拍脑壳、想当然所能凑效的,它只能在反复的技术经济比较论证中脱颖而出。选择桥梁方案首先是项目决策阶段的重要步骤,一个优秀方案的确立又为设计和施工提供了基础依据。作为国家基础设施的桥梁工程建设,首当考虑百年大计,这就要求桥梁建成之后,不仅要在工程技术质量上经得起历史考验,而且应能最大限度地发挥其使用价值,从而获得最佳的经济效益和社会效益。可以这样说,一个优秀的桥梁方案的推出,其意义和作用决不亚于完成一个优秀的桥梁设计,就宏观作用和
I. INTRODUCTION The fundamental purpose of choosing a bridge scheme is to make the design of the bridge’s entire structural system on a scientific basis. A recognized bridge program of excellence must be a technical unification of the technical feasibility, advancedness, and economic rationality and profitability. However, such a program must not take the lead in the slightest way and take it for granted. In repeated technical and economic comparison demonstration stand out. The first choice of the bridge project is an important step in the decision-making stage of the project. The establishment of an excellent plan provides the basis for design and construction. As a national infrastructure bridge project, the first consideration of a hundred years plan, which requires the bridge is completed, not only in the engineering and technical quality to withstand the test of history, but should be able to maximize its use value, so as to obtain the best Economic and social benefits. It can be said that the introduction and implementation of a good bridge program will never fail to be as effective as the completion of an excellent bridge design.