摘 任石 3'z 重庆石板坡长江大桥位于重庆市渝中区与南岸区之间，建成于上世纪80年代 初，随着国民经济的持续高速发展和汽车保有量的迅速增加，加之该桥的特殊位 置，目前该桥日通行量已居重庆所有越江大桥之首，成为该地区路网的主要瓶颈。 在有限的建设资金下，及时有效地改造原有交通设施，使其发挥更大的作用，是 迫切需要的，而且是极为正确和科学的。如何通过局部改造既有路网系统的某些 瓶颈部位，使整个道路系统更加匹配，充分发挥效率，是一种投资省、见效快的 科学方法。 随着城市建设的飞速发展，石板坡大桥南、北端都早己改造为12车道，而20 多年前建成的该大桥远远满足不了这种变化，已严重制约了大桥周边地区社会经 济的持续发展。本文通过对重庆市以及与石板坡大桥两端连接的渝中区与南岸区 经济发展状况，重庆市主城区道路发展规划，重庆市交通增长和需求分析，过江 交通量发展预测分析，论证了诊iri加宽改造的必要性，使有限的桥位资源得到充 分利用;并通过对拟建桥位的地址和地质条件分析，认为拟建桥位适宜建设;根 据合理安排资金，创造节约型社会的原则制定大桥规模为四车道，按现行规范执 行技术标准。在正桥的方案设计中，通过对四个方案的综合比较，综合考虑通航(一 跨越过主航道)、景观、安全、旧桥重建布跨等制约因素，结合桥梁工程中非常成 熟的混凝土梁悬臂技术、钢结构箱梁制造技术、大吨位吊装技术等，推荐采用七 跨一联86.5+4X 138+330(主跨)+132.5=1101m的钢混组合式连续刚构桥梁体系为实 施方案。 关键词:石板坡大桥，交通瓶颈，节约，桥梁，钢混组合式连续刚构 重庆大学硕士学位报告 英文摘要 ABSTRACT Chongqing Shibanpo bridge is located between Yuzhong district and Nan'an district, which built in the early 1980s.With the constantly and rapid development of national economy and quick increasing vehicle population as well as particularity of the bridge location, the daily traffic volume of Shibarpo bridge has stood the first place among all the bridges crossing over river in Chongqing. Now it has been the main bottle-neck in the road net of this district. It will be correct and scientific that reforming the original traffic facilities in time to make it act better on the condition of fund limited. Whole road system is to work with higher efficiency and better cooperation, through partial reforming some bottle-neck place of the present road net which is a economy and efficient way. By anal州ng the economy development, road planning, traffic increase and demand of this district, this paper demonstrates the necessity of widening the bridge. In the conceptual design of main bridge,. restrict factor, such as navigation (one span crossing the main channel), landscape, security, rebuilding old bridge and some mature construction technique as cantilever segmental construction, steel box beam manufacture, large-tonnage lifting were taken into account. A steel-concrete co-operation system of continuous ri乡d frame bridge with seven span (86.5+4X138+330+132.5=1101m) is recommended as executive plan. The resource of bridge site is fully used with this plan. Keywords: Shibanpo bridge, Bottleneck of Vrban Transportation Economy, Bridge, A steel-concrete co-operation system of continuous rigid frame bridge 重庆大学硕士学位报告 目录 目录 中文摘要..................一。.....................................一。................................................................ I 英文摘要...............‘.…，................。..................................................................................... II 1绪论.，，.，.................................，，.…，~.................，.…，.....................。.…，...................。.1 1.1问题的提出及研究意义..…，............…............····.··....·.····.·.························-···········~…1 1.1.1问题的提出…..................................................................................................................... 1 1.1.2问题的必要性...................................................................................... ............................. 1 1.2本文研究的目的和主要研究内容..............。一，.............................................................. 3 1.2.1研究目的二。........................:................................................................................................ 3 1.2.2主要研究内容................。二。.......................................................................................... 3 2重庆市、渝中区、南岸区经济社会发展状况................................................... 4 2.1重庆市自然地理、国民经济和社会发展概况....................................................................... 4 2.1.1自然地理匆工程地质........................................................................................................ 4 2.1.2城市社会经济结构，...................................···..···.··.·.············································7 2.2渝中区国民经挤和社会友展概况......................................................................................... 10 23南岸区国民经济和社会发展概况.....。，........，.............................................11 3重庆主城区道路规划及交通需求分析..........................................................13 3.1主城区道路交通现状二、.‘................................。.·......·.·····，···········，······························13 3.1.1土城区道路交通特点................................................................···.·.··.·.············，···13 3.1.2主城区道路交通存在的问题.......................................................................................... 13 3.2主城区道路交通规划..…，.........，......................·.··.·.·······，，·······························14 33城市综合交通运输，~..........，..................···..·.·········4············································15 3.4现有机动车数量....一...............、..........。二。...，.…，·.····.·.···································17 3.5交通需求分析与预测..................‘二，‘..，..·-.·.···································........................... 17 3.6交通运输发展趋势分析.......，.。..…、，··，·.······.·..·.·.·····························，··························21 3.7过江交通量发展预侧分析.…。.~.‘‘.......··...····..........····························~·········23 4建设地址、条件、规模及技术标准..…。…。.............，...................。........27 4.1建设地址.…“...，.‘.....….…“二…............................................................................................ 27 4.2建设条件.......一...............。...。一~一，............................................................................ 27 4.2.1水文地质条件分析.“........‘一，，二。........................................................................... 27 4.2.2工程地质条件分析....-...~一..一‘二，.…，..........·.··......···-。…，·······~·············28 4.2.3地震及气象分析.........….。.…。‘.…‘二，............................................................................ 30 重庆大学硕士学位报告 目录 4.2.4筑路材料来源及运输条件分析...................................................................................... 30 43建设规模及内容..................................................................................................................... 31 4.4建设标准的确定.…，........................................·..····.······..·························，························31 5工程设计方案...................................................................................................................... 32 5.1设计原则和方案二，.......................................................。··...····..·..·····....··........·············犯 5.1.1设计原则.......................