XX号桥梁结构系统建设(论文+DWG图纸)
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摘 要
根据市区总体规划,为了加快凌南新区的开发,缓解市区的交通压力,改善交通布局推动锦州的经济发展,决定在市区南大桥与西大桥之间修建一座凌川大桥。大桥距南1300m,距西1000m。内环相交中线正对锦州古塔。在设计过程中为了防止洪水灾害和地震灾害。洪水频率按100 年一遇,地震裂度是7 级。该河段属于滩性河段,河槽稳定,主流流南,线偏南侧;经地质勘察,地质表成为黏土,粉沙,粗沙组成,次层为圆砾角砾泥岩系等。通过水文计算得出设计凌川大桥全长440 米。全桥采用简支混凝土梁桥设计。因为它受力明确,结构简单,施工方便,结构内力系受外力影响,能适应在地质较差的桥位上建桥。设计采用5 根主梁。每根主梁的跨径是40 米。主梁配筋采用10 根钢筋。墩台基础和行车道板都是严格按照“桥规“规定进行计算。根据设计要求,桥下无通航,并且桥梁高度由水文计算确定。桥高为23.15 米。凌川大桥是锦州市重点建筑。无论是在交通运输还是在经济发展,凌川大桥都起到了不可代替的位置。
关键词:汽车荷载;洪水频率;桥长;主梁配筋;简支梁桥
.Abstract
According to the comprehensive layout of urban area, in order to empolder Lingnan new area rapidly, reduce the press of the the center of the city.Improve the traffic layout and promote the development of Jinzhou.. Lingchuan bridge is determined to build between the south bridge and the west bridge.The distance of Lingchuan to the south bridge is 1300 metres , and the distance to the west bridge is 1000 metres.The inner-loop anastomosis faced to the ancient tower. In the course of design, in order to prevent the bridge from flood and earthquake disaster , Soppose the frequency of flood is suffered every 100 years and the split of earthquake is the 7th level. The river reach belongs to the beach reach, the trough is steady ,and the mainstream flows to the south , the line is leaned to the south. According to the geology reconnaissance, the surface of the geology is made up of clay, powder-sand and thick-sand .And the sublayer is made up of clay rock and so on. [资料来源:www.THINK58.com]
By the hydrology calculation, the total length of the Lingchuan bridge is 440 metres . Design load adopts the automobile- 20 and the trailer - 100. The whole bridge adopts simple concrete to design the bridge . Because it can stand press definitely , the structure is simple , the construction is convenient .The internal press of structure is influenced to external press. It can adapt to build the bridge on the bad location , Design adopts 5 girders,and the span of every girder is 40 meters ,the compound bar of girders adopts 10 reinforcing steel bars .The frusta base and traffic road are calculated strictly according to the bridge rule..According to the design requirement that there is not traffic and the height of the bridge is depended on hydrology calculation. The height of it is 23.15 metres. Ling Chuan bridge is one of the important constructions in Jinzhou . Ling Chuan bridge takes an important role in traffic transport and economic development.
Key words: auto-load ; frequency of flood ; the length of the bridge ; the compound bar of girders ; simple bridge
目录
第1章 绪论 1
1.1 设计技术指标 1
第2章 方案比选 2
2.1 方案比选 2
2.2 比选结果 3
第3章 上部结构 4
3.1 设计资料及构造布置 4
3.1.1 设计资料 4
3.1.2 横截面布置 4
3.1.3 横截面沿跨长的变化 8
3.1.4 横隔梁的设置 8
3.2 主梁内力计算 8
3.2.1 恒载内力计算 9
3.2.2 活载内力计算 11
3.2.3 内力组合 22
3.3 预应力刚束的确定及布置 24
3.3.1 跨中截面钢束的估算和确定 24
3.3.2 预应力钢束布置 25
3.4 主梁截面几何特性 32
3.4.1 截面面积及贯矩计算 32
3.4.2 截面净矩计算 35
3.4.3 截面几何特性汇总 37
3.5 钢束预应力损失计算 39
3.5.1 预应力钢束与管道臂之间的摩擦引起的预应力损失 40
3.5.2 由锚具变形钢束回缩引起的损失 40
3.5.3 混凝土弹性压缩引起的应力损失 44
3.5.4 由钢束应力松弛引起的预应力损失 46
3.5.5 混凝土收缩和徐变引起的预应力损失 47
3.5.6 成桥后张拉N7号钢束混凝土弹性压缩引起的预应力损失 49
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3.5.7 预加力计算及钢束预应力损失汇总 54
3.6 主梁截面强度与应力验算 56
3.6.1 持久状况承载能力极限状态承载力验算 57
3.6.2 正常使用极限状态计算 64
3.6.3 持久状况构件的应力验算 70
3.6.4 短暂状况构件的应力验算 80
3.7 主梁端部的局部承压强度验算 85
3.7.1 局部承压区的局部验算 85
3.7.2 局部抗压承载力验算 86
3.8 主梁变形验算 87
3.8.1 计算由预加力引起的跨中反拱度 88
3.8.2 计算由荷载引起的跨中挠度 92
3.8.3 结构刚度验算 93
3.8.4 预拱度的设置 93
3.9 横隔梁计算 93
3.9.1 横梁弯矩计算(用G—M法) 93
3.9.2 截面配筋计算 94
3.10 行车道板计算 95
3.10.1 恒载及其内力计算 95
3.10.2 内力组合 96
3.10.3 截面设计配筋及强度验算 96
3.11 支座计算 97
第4章 下部结构 99
4.1 桥梁墩台的构造 99
4.1.1 设计资料 99
4.2 桥墩的构造 100
4.3 桥台的构造 100
第5章 施工组织设计 101
5.1 编制依据 101
5.2 编制原则 101
5.3 施工方案、施工方法 102
5.3.1 钻孔灌注桩施工 102
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5.3.2 墩柱、台施工 102
5.3.3 盖梁施工 103
5.3.4 预应力张拉 104
5.3.5 预应力束孔道压浆 104
5.3.6 桥面系及附属工程施工 105
5.4 施工机具 106
致 谢 107
参考文献 108
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第1章 绪论
1.1 设计技术指标
1. 设计荷载 :公路Ⅰ级
2. 桥面净空 :净-22.5+人行道2*0.75
3. 洪水频率 :按100 年一遇设计
4. 地震烈度
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