I 摘要 可行性研究是工程项目前期立项、中间运作、最终实施的一种重要研究方法，通过 科学详尽可行性研究预估工程从设计、施工到后期使用及养护等多个环节可能出现的设 计方案、施工技术、社会影响、造价投资、养护运行等一系列前后问题，从起步阶段就 避免出现方案不合理、施工难度大、投资不合理、社会影响不良等不利状况。城市桥梁 的拆除改建项目，尤其是城市重要跨河主干道桥梁的拆除改建项目，在施工中常常保通 困难、保通压力大、牵扯到产权部门多、拆改难度大、工期较长，工程的可行性研究显 得尤为重要。 周口市大庆路是周口市区内南北主要交通要道，位于大庆路上的沙河桥出现险情断 行后，对当地交通影响很大，当地政府决定改建大庆路沙河桥。 本文以周口市大庆路沙河桥改建工程为背景，重点从四个方面对项目可行性进行了 研究， 首先，对项目所在区域的道路桥隧、市政设施、交通量等现状进行了调查和分析， 阐明了项目建设的可行性和必要性；其次，论述了所在区域的自然条件和基础资料，对 建设规模和技术标准进行了论证；第三，重点对工程方案进行了论证，通过从桥位、结 构形式、横断面布置、施工难易程度、养护、工期、造价、景观设计、桥梁养护与管理、 建设用地及拆迁、新技术采用和对环境、安全等方面，拟定（60+195+60）m双塔双索 面斜拉桥为推荐方案；最后，进行了经济评价和社会环境效益分析。 研究表明，本工程是尽快恢复两岸交通和经济发展所紧迫需要的，符合周口市城市 路网规划，是城市发展必须的，在工程技术和工程建设资金方面是可行的、有保障的， 建议尽快展开前期各项准备工作。 本文的研究成果为周口市大庆路沙河大桥改建实施提供了依据，也可为类似拆改新 建工程提供研究方法参考。 关键词，城市桥梁改建；可行性研究；方案论证；经济评价；社会评价Abstract I Abstract Feasibility study is an important research method of early project construction, intermediate operation and final implementation of the project. Through scientific exhaustive feasibility studies, it is possible to predict the possible design schemes and construction of various aspects of the project from design, construction to later use and maintenance Technology, social impact, cost investment, conservation operation and other issues listed before and after the round can be more comprehensive from the initial stage to avoid the program unreasonable, difficult construction, investment unreasonable, social impact and other issues. The demolition and reconstruction project of urban bridges, especially the demolition and reconstruction project of important bridges across the river main roads in the city, often cause difficulties in construction, so there is a lot of pressure on Bao Tong, involving many departments of property right, difficulty in demolition and disassembly, longer construction period, The feasibility study is particularly important. Daqing Road, Zhoukou City, is the main traffic artery in the north and south of Zhoukou City. After the Dan River Bridge on Daqing Road appeared dangerous and broken line, it had a great impact on local traffic. The local government decided to rebuild Shahe Bridge of Daqing Road. In this paper, Daqing Road, Zhoukou City, Shaheqiao reconstruction project as the background, focusing on four aspects of the feasibility of the project were studied: First of all, the current situation of road, bridge and tunnel, municipal facilities and traffic volume in the area where the project is located are investigated and analyBed, and the feasibility and necessity of the project construction are clarified. Secondly, the natural conditions and basic data of the area are discussed, Scale and technical standards. Thirdly, the project plan is demonstrated emphatically. Through the bridge construction, cross-sectional layout, ease of construction, maintenance, construction period, cost, landscape design, bridge maintenance and management, Construction land and demolition, adoption of new technologies and environmental and safety aspects, a（60+195+60）m Cable stayed bridge with double cable planes on Twin Towers bridge is proposed as the recommended plan. Finally, economic evaluation and social environmental benefit analysis are carried out. Research shows, this project urgently needs to resume the cross-Strait transportation and economic development as soon as possible and is in line with the urban road network planning of Zhou kou City. It is necessary for urban development and is feasible and secure in terms of engineering technology and project construction funds Therefore, the construction ofAbstract II this project is necessary and feasible, and it is suggested to start the preparatory work for the previous period as soon as possible.. The research results of this paper provide a relatively detailed reference for the reconstruction of Shahe Bridge in Daqing Road, Zhoukou City, and provide comparison and selection of research methods for similar reconstruction and reconstruction projects. Key Words，Reconstruction of urban bridges；feasibility study；program demonstration； economic evaluation；social evaluation目录 I 目录 摘要.................................................................................................................... I Abstract...............................................................................................................I 1.引言.................................................................................................................1 1.1 建设背景与研究的重要意义................................................................................................1 1.2 国内外可行性研究现状简介.............................................................................................. 2 1.2.1 国外可行性研究现状.................................................................................................................... 2 1.2.2 国内可行性研究现状.................................................................................................................... 3 1.3 本文研究范围和主要研究内容.......................................................................................... 3 1.3.1 研究范围........................................................................................................................................ 3 1.3.2 主要研究内容................................................................................................................................ 4 2.现状评价及建设必要性分析..........................................................................5 2.1 概述.........................................................................................................................................5 2.1.1 城市道路、桥隧及相应市政基础设施建设现状........................................................................5 2.1.2 沙河桥梁建设现状........................................................................................................................ 6 2.2 项目范围内交通量预测.......................................................................................................7 2.3 分析桥位处规划用地情况...................................................................................................8 2.4 桥梁建设的可行性、必要性.............................................................................................. 8 2.4.1 原有大庆路沙河桥现状................................................................................................................ 8 2.4.2 桥梁建设对城市发展、对国民经济发展的作用........................................................................9 2.4.3 桥梁建设的可能性、必要性...................................................................................................... 10 2.5 本章小结............................................................................................................................... 11 3.建设条件和建设规模....................................................................................12 3.1 自然条件..............................................................................................................................12 3.1.1 地形地貌...................................................................................................................................... 12 3.1.2 气象.............................................................................................................................................. 12 3.1.3 周边环境...................................................................................................................................... 13 3.1.4 地震.............................................................................................................................................. 13目录 II 3.2 基础资料...............................................................................................................................13 3.2.1 水文.............................................................................................................................................. 13 3.2.2 地质.............................................................................................................................................. 14 3.2.3 土壤.............................................................................................................................................. 15 3.2.4 与桥梁有关的道路情况及航运情况..........................................................................................15 3.2.5 筑路材料及运输条件.................................................................................................................. 16 3.2.6 施工条件...................................................................................................................................... 16 3.3 建设规模及设计技术标准.................................................................................................16 3.3.1 设计原则...................................................................................................................................... 16 3.3.2 设计规范和标准.......................................................................................................................... 17 3.3.3 主要设计技术指标的选用........................................................................................................... 17 3.3.4 建设规模....................................................................................................................................... 17 3.4 本章小结..............................................................................................................................18 4. 工程方案论证............................................................................................. 19 4.1 桥位方案选择.......................................................................................................................19 4.2 总体设计...............................................................................................................................19 4.2.1 桥梁总体布置及桥孔设计.......................................................................................................... 19 4.2.2 桥梁横断面布置........................................................................................................................... 20 4.2.3 桥梁纵断面布置........................................................................................................................... 22 4.3 桥梁方案设计......................................................................................................................22 4.3.1 桥梁方案与比较.......................................................................................................................... 22 4.3.2 桥梁建筑及景观工程.................................................................................................................. 23 4.4 附属工程..............................................................................................................................29 4.4.1 照明工程...................................................................................................................................... 29 4.4.2 管线工程...................................................................................................................................... 29 4.4.3 交通工程...................................................................................................................................... 29 4.4.4 老桥拆除工程.............................................................................................................................. 30 4.5 桥梁的养护和管理............................................................................................................. 31 4.6 建设用地及拆迁................................................................................................................. 31 4.7 新技术采用..........................................................................................................................31 4.7.1 设计方面新的理念、方法和技术..............................................................................................31 4.7.2 拆除、施工等方面新的理念、方法和技术..............................................................................39目录 III 4.8 对环境、安全等方面的论证............................................................................................. 40 4.9 本章小结...............................................................................................................................40 5.经济评价及社会环境效益分析.................................................................... 41 5.1 投资估算及资金筹措.........................................................................................................41 5.1.1 编制依据...................................................................................................................................... 41 5.1.2 费用说明...................................................................................................................................... 41 5.1.3 投资估算总金额.......................................................................................................................... 41 5.1.4 资金筹措...................................................................................................................................... 43 5.1.5 桥梁装饰及总投资估算.............................................................................................................. 44 5.2 经济评价..............................................................................................................................44 5.2.1 财务评价...................................................................................................................................... 44 5.2.2 国民经济评价.............................................................................................................................. 45 5.3 社会环境效益分析............................................................................................................. 51 5.4 本章小结..............................................................................................................................52 6.结论与建议................................................................................................... 53 6.1 结论...................................................................................................................................... 53 6.2 建议...................................................................................................................................... 53