基于EEA山区桥梁架梁方案优化研究

Study on Optimization of Girder Erection Scheme in Mountain Area Based on the Extended Exergy Accounting Method

为了解决山区由于地形条件受限的桥梁施工架梁的难题,降低工程成本、提高作业效率,通过对地形地貌的调研,以经济学、桥梁工程等理论为基础,采用EEA方法对扩散式架梁方法分析物质能源、劳动力、资金和环境的成本,建立了架梁施工扩展成本计算的数学模型。针对山区桥梁架设较为成熟的方案,提出一种使用龙门吊架设桥梁的优化方案;将优化方案与传统逐跨架梁方案从工序与工期方面进行定性对比,发现无法判断方案优劣;利用架梁施工扩展成本计算的数学模型对各方案就CEx C、EL、EK、EO等对比分析,得出优化方案具有较为明显的优势。研究提出了一种适合地形条件受限的桥梁施工架梁施工的新技术,为桥梁架梁施工的方案优化提供了一种新的思路。

In order to solve the problem of the girder erection of the bridge due to the limitation of the terrain condition,to reduce project cost,improve work efficiency,analyzed the energy cost of material energy,labor,capital and environment of diffusion type girder method by the method of EEA as well as established a mathematical model of the girder construction expansion energy cost calculation based on the theory of energy economics and bridge engineering.Aiming at the scheme of setting up a bridge in mountainous area,an optimization scheme is proposed to construct a bridge with gantry hanger.The optimization scheme is compared with the traditional cross-beam method,and it is found that the scheme can not judge the merits of the scheme.The mathematical model of the extended cost calculation shows the advantages of CExC,EL,EK,EO and so on,and the optimization scheme has obvious advantages.This paper presents a new technology for the construction of bridge girder with limited terrain conditions,which provides a new idea for the optimization of bridge beam construction.