G309莱西段危桥改建工程建设方案研究
发布时间：2018-12-14 12:17
【摘要】：由于我国公路事业发展层次不同,部分国省道上的现役桥梁建于上世纪六七十年代,由于当时建设水平不高、技术标准较低、服役年龄较长,且当今重载、超载车辆的增多,给这部分桥梁带来了使用上的安全隐患。 对旧桥进行改造,一方面可以保证人民群众的生命财产安全,推动和谐社会建设的步伐：另一方面可以保持国省道的连续性,充分发挥国省道对经济发展的带动和促进作用。其中科学、合理、经济的建设方案是保证旧桥改造成功与否的前提和关键性因素。 本论文选取G309莱西段上的史家庄桥、洙河桥和大沽河桥为研究对象展开对危桥改造建设方案的研究。其主要研究内容如下： (1)用基于定基法的预测原理,从时间序列角度来预测本论文自然增长的交通量。诱增交通量采用定性分析的方法确定。通过预测交通量结果的分析确认了桥梁改建的必要性； (2)从危桥改造的建设条件和技术标准出发,结合桥梁现有病害分析制定相关建设方案,从建设方案的结构一致性、整体性和工程造价等方面对和建设方案进行综合论证; (3)采用“有无对比法”对危桥改造建设方案的经验效益进行计算分析,来确定所采取建设方案的国民经济内部收益率、经济净现值、费用效益比和投资回收年限； (4)结合危桥改造项目实际情况,同时参考一级公路计算模型与系数,制定了危桥改造项目节能评价的计算模型。 从最终确定的危桥该桥建设方案来看,方案结构合理、整体性好,国民经济内部收益率为12.95%。从敏感性分析结果表明,效益减少10%同时建设费用增加10%的不利情况下,国民经济内部收益率为9.97%高于8%的社会折现率。建设期及养护需耗用能源约1208.23吨标准煤,运营期节约能源约1500吨标准煤。
[Abstract]:Because of the different levels of highway development in China, the active bridges on provincial highways in some countries were built in the 1960s and 1970s. At that time, the construction level was not high, the technical standards were low, the service age was relatively long, and the heavy load and overloaded vehicles were increasing. To this part of the bridge brought safety risks in use. On the one hand, the reconstruction of the old bridge can ensure the safety of the people's life and property and promote the pace of building a harmonious society. On the other hand, it can maintain the continuity of the national provincial road and give full play to the role of the national provincial road in driving and promoting economic development. The scientific, reasonable and economical construction scheme is the premise and key factor to ensure the success of the old bridge reconstruction. In this paper, Shijiazhuang Bridge, Suhe Bridge and Dagu River Bridge in G309 Laixi section are selected as the research objects to study the reconstruction and construction scheme of the dangerous Bridge. The main research contents are as follows: (1) based on the prediction principle of fixed basis method, the natural growth of traffic volume in this paper is predicted from the point of view of time series. The induced traffic volume is determined by qualitative analysis. The necessity of bridge reconstruction is confirmed by analyzing the result of forecasting traffic volume. (2) starting from the construction conditions and technical standards of the reconstruction of the dangerous bridge, combining with the analysis of the existing diseases of the bridge, the relevant construction plans are formulated, and the structural consistency of the construction scheme is considered. The integrality and construction cost of the project are discussed in the aspects of integrality and construction cost. (3) calculating and analyzing the experience benefit of the reconstruction scheme of dangerous bridge by using the method of "with or without comparison", to determine the internal rate of return, the net present value of economy, the ratio of cost to benefit and the years of return of investment; (4) combined with the actual situation of the dangerous bridge reconstruction project and referring to the calculation model and coefficient of the first-grade highway, the calculation model of the energy-saving evaluation of the dangerous bridge reconstruction project is established. From the view of the final construction plan of the dangerous bridge, the structure of the scheme is reasonable, the integrity is good, and the internal rate of return of the national economy is 12.95%. The results of sensitivity analysis show that when the benefit is reduced by 10% and the construction cost is increased by 10%, the internal rate of return of the national economy is 9.97% higher than the social discount rate of 8%. Energy consumption is about 1208.23 tons in construction period and maintenance period, and energy saving in operation period is about 1500 tons standard coal.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.6
本文编号：2378598
[Abstract]:Because of the different levels of highway development in China, the active bridges on provincial highways in some countries were built in the 1960s and 1970s. At that time, the construction level was not high, the technical standards were low, the service age was relatively long, and the heavy load and overloaded vehicles were increasing. To this part of the bridge brought safety risks in use. On the one hand, the reconstruction of the old bridge can ensure the safety of the people's life and property and promote the pace of building a harmonious society. On the other hand, it can maintain the continuity of the national provincial road and give full play to the role of the national provincial road in driving and promoting economic development. The scientific, reasonable and economical construction scheme is the premise and key factor to ensure the success of the old bridge reconstruction. In this paper, Shijiazhuang Bridge, Suhe Bridge and Dagu River Bridge in G309 Laixi section are selected as the research objects to study the reconstruction and construction scheme of the dangerous Bridge. The main research contents are as follows: (1) based on the prediction principle of fixed basis method, the natural growth of traffic volume in this paper is predicted from the point of view of time series. The induced traffic volume is determined by qualitative analysis. The necessity of bridge reconstruction is confirmed by analyzing the result of forecasting traffic volume. (2) starting from the construction conditions and technical standards of the reconstruction of the dangerous bridge, combining with the analysis of the existing diseases of the bridge, the relevant construction plans are formulated, and the structural consistency of the construction scheme is considered. The integrality and construction cost of the project are discussed in the aspects of integrality and construction cost. (3) calculating and analyzing the experience benefit of the reconstruction scheme of dangerous bridge by using the method of "with or without comparison", to determine the internal rate of return, the net present value of economy, the ratio of cost to benefit and the years of return of investment; (4) combined with the actual situation of the dangerous bridge reconstruction project and referring to the calculation model and coefficient of the first-grade highway, the calculation model of the energy-saving evaluation of the dangerous bridge reconstruction project is established. From the view of the final construction plan of the dangerous bridge, the structure of the scheme is reasonable, the integrity is good, and the internal rate of return of the national economy is 12.95%. The results of sensitivity analysis show that when the benefit is reduced by 10% and the construction cost is increased by 10%, the internal rate of return of the national economy is 9.97% higher than the social discount rate of 8%. Energy consumption is about 1208.23 tons in construction period and maintenance period, and energy saving in operation period is about 1500 tons standard coal.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.6
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