CN205676768U - The large span space three-dimensional intersection chevron shaped overline bridge of steel construction - Google Patents
The large span space three-dimensional intersection chevron shaped overline bridge of steel construction Download PDFInfo
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- CN205676768U CN205676768U CN201620229221.0U CN201620229221U CN205676768U CN 205676768 U CN205676768 U CN 205676768U CN 201620229221 U CN201620229221 U CN 201620229221U CN 205676768 U CN205676768 U CN 205676768U
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Abstract
Description
技术领域technical field
本实用新型涉及钢结构天桥的改进，尤其涉及针对丁字路口各方向互通要求，设计大跨度空间三向交叉钢结构人字型天桥。The utility model relates to the improvement of a steel structure overpass, in particular to the design of a three-way intersecting steel structure herringbone overpass with a large span space for the intercommunication requirements in all directions of a T-shaped intersection.
背景技术Background technique
丁字路口是繁忙交通干线的汇合处，属于交通密集区，机动车辆多，种类多样，速度快，尤其在社会人员上下班过街流量激增，人车相拥，造成交通的“肠梗阻”，因此人行天桥的建设势在必行。场地空间狭小时，现行的钢结构天桥，由于跨中需设置桥墩，无法使用，也不能满足各向在最短距离内的互通要求。为了使空间场地受限的丁字路口处，实现“人车分离”，确保交通畅通和交通安全，切实缓解交通拥堵问题，非常有必要改进人行天桥设计，解决机动车辆与行人过街的冲突现状，改善区域交通状况。The T-junction is the confluence of busy traffic arteries. It belongs to a traffic-intensive area with many motor vehicles, various types and fast speeds. Especially in the society, the flow of people crossing the street surges when commuting to and from get off work. People and vehicles hug each other, causing "intestinal obstruction" in traffic, so pedestrians The construction of the bridge is imperative. When the site space is small, the current steel structure flyover cannot be used because of the need to set piers in the middle of the span, and it cannot meet the requirements for intercommunication within the shortest distance in all directions. In order to achieve "separation of people and vehicles" at the T-shaped intersection with limited space and space, ensure smooth traffic and traffic safety, and effectively alleviate traffic congestion, it is very necessary to improve the design of pedestrian bridges, solve the current conflict between motor vehicles and pedestrians crossing the street, and improve Regional traffic conditions.
实用新型内容Utility model content
本实用新型所要解决的技术问题是设计大跨度空间三向交叉钢结构人字型天桥，该天桥综合考虑丁字路口各个方向的互通，针对大跨度人行天桥结构自振频率低的问题，立柱设置格构柱，跨中设环岛解决自振频率问题；针对温度等荷载产生的柱底弯矩效应大导致基础设计困难的问题，创新性的在刚构立柱底安装LYQZ型固定支座，释放了上部结构由于温度等荷载产生的弯矩效应，优化基础设计。The technical problem to be solved by the utility model is to design a large-span space three-way intersection steel structure herringbone bridge, which comprehensively considers the intercommunication in all directions of the T-shaped intersection, and aims at the problem of low natural vibration frequency of the long-span pedestrian bridge structure. For structural columns, a ring island is set in the middle of the span to solve the problem of natural vibration frequency; in view of the problem that the large bending moment effect at the bottom of the column caused by temperature and other loads makes the foundation design difficult, an innovative LYQZ type fixed support is installed at the bottom of the rigid column, which releases the upper Due to the bending moment effect of the structure due to temperature and other loads, the foundation design is optimized.
为解决上述问题，本实用新型所述的大跨度空间三向交叉钢结构人字型天桥，其特征在于：它包括主桥结构所用钢箱梁结构，钢箱梁结构顶宽5.4米，在三向交叉处设直径等于3m的圆孔以作分流之用，在刚构立柱与主梁刚接处设长为3.8m、宽为5.4m的平台，平台范围内灌注C40微膨胀混凝土,平台下的刚构立柱为四根1.2m×1.0m钢混组合矩形柱，各个刚构立柱间用两道0.5m×0.5m横梁连接以增强结构刚度和整体性，每个柱底均设置LYZQ固定支座。In order to solve the above problems, the large-span space three-way intersecting steel structure herringbone bridge described in the utility model is characterized in that it includes a steel box girder structure used in the main bridge structure, and the top width of the steel box girder structure is 5.4 meters. A round hole with a diameter equal to 3m is set at the intersection for diversion, and a platform with a length of 3.8m and a width of 5.4m is set at the rigid connection between the rigid column and the main beam, and C40 micro-expansion concrete is poured into the platform range. The rigid-frame columns are four 1.2m×1.0m steel-concrete composite rectangular columns, and each rigid-frame column is connected by two 0.5m×0.5m beams to enhance structural rigidity and integrity, and LYZQ fixed supports are installed at the bottom of each column seat.
本实用新型与现有钢结构人行天桥相比具有以下优点：（1）成功解决城市主干道丁字路口设置互通式人行天桥，为实现丁字路各个方向的互通，桥平面布置呈Y型，本桥跨中不设置桥墩，使桥下通行视野开阔， 3个钢箱梁互为120°角，为减轻桥跨跨中重量和减少人流交织的影响，中心处设一直径为3m的圆孔，圆孔的中心点至3个桥墩中心的水平距离均为31.5米，让行人以最短的距离到达路口的各个方向；（2）提高大跨度人行天桥结构自振频率，大跨度人行天桥的自振频率要满足现行规范的要求，通过结构计算分析，采用格构柱增强结构的刚度和整体性，结构的自振频率满足规范中对于自振频率不小于3HZ的要求；（3）解决温度等荷载产生的弯矩效应大导致基础设计困难的问题，由于桥跨度大，超静定次数多，所以上部结构由于温度等荷载产生的弯矩效应比较大，这必将导致结构的下部基础投资增大。在设计过程中，创新性的在刚构立柱底安装LYQZ固定支座，释放上部结构由于温度等荷载产生的弯矩效应，优化了基础设计。Compared with the existing steel structure pedestrian bridge, the utility model has the following advantages: (1) It successfully solves the problem of setting up an intercommunicating pedestrian bridge at the T-shaped intersection of the main road in the city. There is no bridge pier in the mid-span, so that the traffic under the bridge has a wide view. The three steel box girders are at an angle of 120° to each other. The horizontal distance from the center point of the hole to the center of the three piers is 31.5 meters, allowing pedestrians to reach all directions of the intersection in the shortest distance; (2) Increase the natural vibration frequency of the long-span pedestrian bridge structure, and the natural frequency To meet the requirements of the current code, through structural calculation and analysis, lattice columns are used to enhance the rigidity and integrity of the structure, and the natural frequency of the structure meets the requirements of the code for the natural frequency of not less than 3HZ; (3) Solve the problem of temperature and other loads The large bending moment effect of the bridge leads to the difficulty of foundation design. Due to the large span of the bridge and many times of static indetermination, the bending moment effect of the upper structure due to temperature and other loads is relatively large, which will inevitably lead to increased investment in the lower foundation of the structure. During the design process, innovatively installed LYQZ fixed support at the bottom of the rigid column to release the bending moment effect of the upper structure due to temperature and other loads, and optimize the foundation design.
本实用新型的大跨度空间三向交叉钢结构人字型天桥结构形式合理，建成后的桥梁造型恢弘大气、气势磅礴、美观大方、雄伟壮观，整体技术水平较高，应用前景广阔。兰州市新胜利宾馆人行天桥采用了大跨度空间三向交叉钢结构人字型天桥，成功解决了兰州市主干道双城门地段的交通问题，实现丁字路口各个方向的互通，将极大的方便两侧的行人过街，实现人车分离，使道路交通更加顺畅，提高道路运营的效率，保证行人的过街安全。The large-span space three-way intersecting steel structure herringbone bridge of the utility model has a reasonable structural form. After the completion of the bridge, the shape is magnificent, majestic, beautiful and majestic, the overall technical level is high, and the application prospect is broad. The pedestrian bridge of Xinshengli Hotel in Lanzhou adopts a large-span three-way cross steel structure herringbone bridge, which successfully solves the traffic problem in the Shuangchengmen section of the main road in Lanzhou City, and realizes the intercommunication in all directions of the T-shaped intersection, which will be very convenient. Pedestrians crossing the street on both sides realize the separation of pedestrians and vehicles, making road traffic smoother, improving the efficiency of road operations, and ensuring the safety of pedestrians crossing the street.
附图说明Description of drawings
下面结合附图对本实用新型作进一步详细的说明。Below in conjunction with accompanying drawing, the utility model is described in further detail.
图1为本实用新型的大跨度空间三向交叉钢结构人字型天桥的全桥平面布置图。Fig. 1 is the whole bridge plan layout of the large-span space three-way intersecting steel structure herringbone bridge of the present invention.
图2为本实用新型的大跨度空间三向交叉钢结构人字型天桥的主桥结构1/3立面图。Fig. 2 is a 1/3 elevation view of the main bridge structure of the large-span space three-way intersecting steel structure herringbone bridge of the present invention.
图中：1—钢箱梁结构 2—平台 3—刚构立柱 4—横梁 5—LYQZ固定支座。In the figure: 1—steel box girder structure 2—platform 3—rigid frame column 4—beam 5—LYQZ fixed support.
图3为本实用新型的大跨度空间三向交叉钢结构人字型天桥的主桥结构1/3平面图。Fig. 3 is a 1/3 plan view of the main bridge structure of the large-span space three-way intersecting steel structure herringbone bridge of the present invention.
图中：1—钢箱梁结构 2—平台 3—刚构立柱。In the figure: 1—steel box girder structure 2—platform 3—rigid column.
图4为本实用新型的大跨度空间三向交叉钢结构人字型天桥的LYQZ固定支座顺桥向示意图。Fig. 4 is a schematic diagram of the LYQZ fixed bearing along the bridge direction of the large-span space three-way cross steel structure herringbone bridge of the present invention.
图5为本实用新型的大跨度空间三向交叉钢结构人字型天桥的LYQZ固定支座横桥向示意图。Fig. 5 is a schematic diagram of the horizontal bridge direction of the LYQZ fixed support of the large-span space three-way intersecting steel structure herringbone bridge of the present invention.
具体实施方式detailed description
如图2所示，大跨度空间三向交叉钢结构人字型天桥，其特征在于：它包括主桥结构所用钢箱梁结构1，钢箱梁结构顶宽5.4米，在三向交叉处设直径等于3m的圆孔以作分流之用，在刚构立柱3与主梁刚接处设长为3.8m、宽为5.4m的平台2，平台2范围内灌注C40微膨胀混凝土，平台下的刚构立柱3为四根1.2m×1.0m钢混组合矩形柱，各个刚构立柱3间用两道0.5m×0.5m横梁4连接，每个柱底均设置LYZQ固定支座5。As shown in Figure 2, the large-span space three-way intersection steel structure herringbone bridge is characterized in that it includes the steel box girder structure 1 used in the main bridge structure, the top width of the steel box girder structure is 5.4 meters, and the three-way intersection is set A round hole with a diameter equal to 3m is used for diversion. A platform 2 with a length of 3.8m and a width of 5.4m is set at the rigid connection between the rigid column 3 and the main beam. The rigid-frame columns 3 are four 1.2m×1.0m steel-concrete composite rectangular columns, each of the 3 rigid-frame columns is connected by two 0.5m×0.5m beams 4, and LYZQ fixed supports 5 are installed at the bottom of each column.
如图1所示的三向交叉钢结构人字形天桥，先施工桥台，安装LUZA固定支座5，起到抗震稳定效果。在固定支座上连接四根钢筋混凝土组合矩形钢构立柱3和横梁4，用于钢箱梁1的支撑。钢箱梁焊接平台2，形成其中一向钢结构人字形天桥，重复以上步骤，完成大跨度空间三向交叉钢结构人字型天桥1。For the three-way cross steel structure herringbone bridge shown in Figure 1, the abutment is constructed first, and the LUZA fixed support 5 is installed to achieve the effect of anti-seismic stability. Four reinforced concrete composite rectangular steel columns 3 and beams 4 are connected on the fixed support for the support of the steel box girder 1 . The steel box girder welding platform 2 forms one of the one-way steel structure herringbone bridges, and repeats the above steps to complete the large-span space three-way cross steel structure herringbone bridge 1.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337371A (en) * | 2016-11-16 | 2017-01-18 | 上海市城市建设设计研究总院 | The three-beam intersection structure of steel box girder with single-box three-chamber section and manufacturing method thereof |
| CN108004906A (en) * | 2017-12-30 | 2018-05-08 | 贵阳铝镁设计研究院有限公司 | A kind of cross aluminum alloy pedestrian bridge |
| CN109468938A (en) * | 2019-01-11 | 2019-03-15 | 湖南金海钢结构有限公司 | A kind of assembled large span circular ring shape steel structure footbridge and its installation method |
| CN110184890A (en) * | 2019-06-28 | 2019-08-30 | 同济大学建筑设计研究院(集团)有限公司 | A kind of bridge span structure |
| CN110761162A (en) * | 2019-10-31 | 2020-02-07 | 长安大学 | Anti-congestion pedestrian overpass |
-
2016
- 2016-03-23 CN CN201620229221.0U patent/CN205676768U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337371A (en) * | 2016-11-16 | 2017-01-18 | 上海市城市建设设计研究总院 | The three-beam intersection structure of steel box girder with single-box three-chamber section and manufacturing method thereof |
| CN108004906A (en) * | 2017-12-30 | 2018-05-08 | 贵阳铝镁设计研究院有限公司 | A kind of cross aluminum alloy pedestrian bridge |
| CN109468938A (en) * | 2019-01-11 | 2019-03-15 | 湖南金海钢结构有限公司 | A kind of assembled large span circular ring shape steel structure footbridge and its installation method |
| CN110184890A (en) * | 2019-06-28 | 2019-08-30 | 同济大学建筑设计研究院(集团)有限公司 | A kind of bridge span structure |
| CN110184890B (en) * | 2019-06-28 | 2024-03-19 | 同济大学建筑设计研究院(集团)有限公司 | Bridge span structure |
| CN110761162A (en) * | 2019-10-31 | 2020-02-07 | 长安大学 | Anti-congestion pedestrian overpass |
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