CN105735145B - A construction method and its structure for accurate centering control of bridge swivel construction - Google Patents

A construction method and its structure for accurate centering control of bridge swivel construction Download PDF

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CN105735145B
CN105735145B CN201610108481.7A CN201610108481A CN105735145B CN 105735145 B CN105735145 B CN 105735145B CN 201610108481 A CN201610108481 A CN 201610108481A CN 105735145 B CN105735145 B CN 105735145B
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swivel
bridge part
end bay
bridge
line
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CN105735145A (en
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陶美祥
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江国浩
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CCCC First Highway Engineering Co Ltd
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CCCC First Highway Engineering Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections

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Abstract

The invention belongs to a kind of Bridge Rotation Construction Technique precise alignment control construction method and its structure, method is that the vertical visible laser line sent using laser level completes bridge part precise alignment to swivel in bridge part rotator construction.The structure of use includes, laser level is used to complete the bridge part precise alignment control to swivel in bridge part rotator construction, laser level centering is located on the support of the end bay Cast-in-Situ Segment outside the bridge part turning circumference of swivel, and the bottom plate center line in the horizontal line that laser level is projected and the end bay beam-ends cross section of the bridge part of swivel is in same elevation, the bridge part of swivel, the support and temporary rest pier of end bay Cast-in-Situ Segment.The method and its structure of the present invention has the advantages that bridge adjustment measurement is fast, precision is high, speed of application is fast, save labor, construction cost is low, safe, easy to learn and popularization is strong in bridge swivel is applied.

Description

一种桥梁转体施工精确对中控制施工方法及其结构A construction method and its structure for accurate centering control of bridge swivel construction

技术领域technical field

本发明属于一种桥梁转体施工精确对中控制施工方法及其结构。The invention belongs to a precise centering control construction method and structure of bridge swivel construction.

背景技术Background technique

目前，桥梁件转体施工工艺多数用于跨既有铁路线，对既有线施工安全管理要求严格，审批程序较复杂，要求施工必须在给定的时间内完成，否则影响既有铁路线运输安全。At present, most of the bridge parts swivel construction technology is used to cross the existing railway line. The construction safety management requirements for the existing line are strict, and the approval process is complicated. It is required that the construction must be completed within a given time, otherwise the transportation safety of the existing railway line will be affected. .

传统的转体施工精度控制为技术人员对先对已转体的桥梁件用全站仪和水准仪结合进行测量计算，然后通知现场人员再对梁体进行点控调整，由于测量计算需要花费大量的时间，同时需要技术人员拿着测量仪器上桥进入既有线，存在一定的安全隐患；有梁体调整测量慢、精度差、施工速度慢、费工费力、施工成本大和安全性差的不足。The traditional swivel construction accuracy control requires technicians to measure and calculate the swiveled bridge parts with a total station and a level, and then notify the site personnel to make point-controlled adjustments to the beam body. Because the measurement and calculation require a lot of At the same time, technicians are required to take measuring instruments to the bridge to enter the existing line, which has certain potential safety hazards; there are deficiencies in beam adjustment and measurement, poor precision, slow construction speed, laborious and laborious, high construction cost and poor safety.

发明内容Contents of the invention

本发明的目的是设计一种桥梁转体施工精确对中控制施工方法及其结构，用方法及其结构在桥梁体转体施中，具有桥梁体调整测量快、精度高、施工速度快、省工省力、施工成本低、安全性高、简单易学和普及性强的优点。The purpose of the present invention is to design a construction method and its structure for accurate centering control of bridge swivel construction. The method and its structure are used in the construction of the bridge body swivel, which has the advantages of fast adjustment and measurement of the bridge body, high precision, fast construction speed, and low cost. It has the advantages of labor saving, low construction cost, high safety, easy to learn and strong popularity.

为此，本发明利用激光投线仪发出的垂直可见激光线在桥梁件转体施工中完成对转体的桥梁件精确对中，包括如下步骤：For this reason, the present invention utilizes the vertical visible laser line issued by the laser line throwing instrument to complete the precise alignment of the bridge parts of the rotating body during the construction of the bridge part rotating body, including the following steps:

(一)转体前，在转体的桥梁件的边跨梁端横断面的底板上安装纵轴线指针，并在边跨梁端横断面上标出与纵轴线指针垂直的标识线；(1) Before the rotation, install the longitudinal axis pointer on the bottom plate of the side-span beam end cross-section of the swivel bridge member, and mark the marking line perpendicular to the longitudinal axis pointer on the side-span beam end cross-section;

(1)根据设计图纸，在转体的桥梁件的边跨梁端横断面的顶板上测量放样标出转体前轴线点A；(1) According to the design drawings, measure and set out on the top plate of the side-span beam end cross-section of the bridge of the swivel body and mark the front axis point A of the swivel body;

(2)根据设计图纸，在转体的桥梁件的边跨梁端横断面的梁箱室内测量放样标出梁端底板转体前轴线点B；(2) According to the design drawings, measure and set out in the beam box chamber of the side-span beam end cross-section of the swivel bridge parts to mark the axis point B before the swivel body of the bottom plate at the girder end;

(3)在边跨梁端断面的点A和点B之间用白线拉出梁体纵轴线的垂线，根据垂线安装纵轴线指针，所述的纵轴线指针为直径5mm，外露梁底50cm，在纵轴线指针安装时将纵轴线指针方向的外侧与梁体纵轴线的垂线平齐；(3) Pull out the vertical line of the longitudinal axis of the beam body with a white line between point A and point B of the end section of the side span beam, and install the longitudinal axis pointer according to the vertical line. The diameter of the longitudinal axis pointer is 5mm, and the exposed beam bottom is 50cm , when installing the pointer of the longitudinal axis, align the outer side of the pointer direction of the longitudinal axis with the vertical line of the longitudinal axis of the beam body;

(4)纵轴线指针的安装采用与转体的桥梁件的箱梁底板外露钢筋进行焊接，应焊接牢固，保证与垂线偏差小于1mm；(4) The installation of the longitudinal axis pointer shall be welded with the exposed steel bars of the bottom plate of the box girder of the swivel bridge, and the welding shall be firm to ensure that the deviation from the vertical line is less than 1mm;

(5)在转体的桥梁件的边跨梁端横断面的底板上测量出底板的中线，并用墨线弹出，墨线为与纵轴线指针垂直的底板中线；(5) Measure the center line of the bottom plate on the bottom plate of the side-span beam end cross-section of the swivel bridge, and pop it up with an ink line. The ink line is the center line of the bottom plate perpendicular to the pointer of the longitudinal axis;

(二)激光投线仪的放置和校正；(2) Placement and calibration of the laser line projector;

(1)激光投线仪对中位于转体的桥梁件转动圆周外的边跨现浇段的支架上；(1) The centering of the laser line thrower is located on the support of the cast-in-place section of the side span outside the rotation circle of the bridge of the swivel;

(2)激光投线仪投射出的水平线与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程；(2) The horizontal line projected by the laser line projection instrument is at the same elevation as the center line of the bottom plate of the side-span beam end cross-section of the swivel bridge;

(3)校正激光投线仪，使激光投线仪投射出的垂线和水平线均能投射在边跨梁端横断面上，且与设计相同，校正方法包括如下步骤，(3) Calibrate the laser line projection instrument so that the vertical and horizontal lines projected by the laser line projection instrument can be projected on the cross-section of the side span beam end, and it is the same as the design. The calibration method includes the following steps,

(a)借助临时支墩和边跨现浇段的支架作为挂设标线的平台，在借助临时支墩顶上的工字钢和边跨现浇段的支架上测量放样出桥梁件的连续梁设计纵轴线，并在临时支墩墩顶上的工字钢和边跨现浇段的支架上标记轴线点；(a) Use the temporary buttresses and the brackets of the cast-in-place section of the side span as a platform for hanging the marking line, and measure the continuity of the bridge parts by using the I-beam on the top of the temporary buttress and the bracket of the cast-in-place section of the side span. Design the longitudinal axis of the beam, and mark the axis point on the I-beam on the top of the temporary pier and the support of the cast-in-place section of the side span;

(b)在标记的两个轴线点上分别焊接直径10～13mm钢筋，钢筋顶部高出临时支墩墩顶45～55cm，并保证钢筋竖直；(b) Weld steel bars with a diameter of 10-13 mm on the two marked axis points, and the top of the steel bar is 45-55 cm higher than the top of the temporary pier pier, and ensure that the steel bar is vertical;

(c)在两根焊接好的钢筋上挂设标线；(c) Hang marking lines on the two welded steel bars;

(d)在两根焊接好的钢筋上挂设标线，对挂设好的标线进行校核，若发生轴线偏差则进行调整，直到轴线偏差小于1mm；(d) Hang marking lines on the two welded steel bars, check the hanging marking lines, and adjust if the axis deviation occurs until the axis deviation is less than 1mm;

(e)扭动激光投线仪的微调旋钮，使激光投线仪投射出的垂线与挂设的纵轴线的标线重合；(e) Twist the fine-tuning knob of the laser line thrower so that the vertical line projected by the laser line thrower coincides with the marking line of the vertical axis hanging;

(二)转体的桥梁件的对中过程控制；(2) Control of the centering process of the swivel bridge parts;

(1)转体时，在每个边跨现浇段的支架上搭设平台，并配备2名技术员对转体的桥梁件进行实时观察；(1) When rotating, set up a platform on the support of each side span cast-in-place section, and equip 2 technicians to observe the rotating bridge in real time;

(2)当转体的桥梁件即将就位时，技术人员通过测量转体的桥梁件端头上的纵轴线指针与激光投线仪投射出的垂线的距离，用对讲机汇报给总指挥，通过点控调整，直至纵轴线指针与激光投线仪投射出的垂线重合，停止转体的桥梁件转体；(2) When the bridge parts of the swivel body are about to be in place, the technicians measure the distance between the pointer on the longitudinal axis on the end of the bridge parts of the swivel body and the vertical line projected by the laser line projector, and report to the commander-in-chief through the walkie-talkie. Adjust through point control until the pointer of the longitudinal axis coincides with the vertical line projected by the laser line projector, and stop the rotation of the bridge parts;

(3)技术员用盒尺测量激光投线仪水平线与转体的桥梁件的底板中线之间的距离，可直接得到转体后桥梁件的梁端高程与设计值间的差值，可通过千斤顶顶梁端将梁端十字线与激光投线仪发出的十字线调整至重合；(3) The technician uses a box ruler to measure the distance between the horizontal line of the laser liner and the center line of the bottom plate of the swivel bridge, and can directly obtain the difference between the beam end elevation of the swivel bridge and the design value, which can be obtained through the jack At the top beam end, adjust the cross line at the beam end to coincide with the cross line emitted by the laser line thrower;

(4)完成转体的桥梁件的对中转体施工，拆除激光投线仪和纵轴线指针。(4) Complete the centering construction of the swivel bridge parts, and remove the laser liner and the longitudinal axis pointer.

所述的激光投线仪应与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程，激光投线仪与边跨梁端横断面的底板中线的垂线距离为2～4m。所述的激光投线仪应与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程，激光投线仪与边跨梁端横断面的底板中线的垂线距离优选为3m。The laser line throwing instrument should be at the same elevation as the centerline of the bottom plate of the side-span beam end cross-section of the swivel bridge, and the vertical distance between the laser line throwing instrument and the bottom plate center line of the side-span beam end cross-section is 2-4m . The laser line thrower should be at the same elevation as the centerline of the bottom plate of the side-span beam end cross-section of the swivel bridge, and the vertical distance between the laser line thrower and the bottom plate center line of the side-span beam end cross-section is preferably 3m.

一种桥梁转体施工精确对中控制施工方法的结构，包括：A structure for precise centering control construction method of bridge swivel construction, comprising:

激光投线仪，用于在桥梁件转体施工中完成对转体的桥梁件精确对中控制，激光投线仪对中位于转体的桥梁件转动圆周外的边跨现浇段的支架上，激光投线仪投射出的水平线与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程；The laser line throwing instrument is used to complete the precise centering control of the swivel bridge parts in the construction of the bridge part rotation. The laser line throwing instrument is centered on the support of the cast-in-place section of the side span outside the rotation circle of the bridge parts of the swivel body , the horizontal line projected by the laser line projector is at the same elevation as the midline of the bottom plate of the side-span beam end cross-section of the swivel bridge;

转体的桥梁件，转体的桥梁件的边跨梁端横断面的底板上安装有纵轴线指针，转体的桥梁件的边跨梁端横断面上标出有与纵轴线指针垂直的白线，边跨梁端横断面的底板上设有底板中线；For the bridge parts of the swivel body, the longitudinal axis pointer is installed on the bottom plate of the side-span beam end cross-section of the swivel bridge parts, and the white mark perpendicular to the longitudinal axis pointer is marked on the side-span beam end cross-section of the swivel bridge parts. Line, the bottom plate of the cross-section of the side-span beam end is provided with the center line of the bottom plate;

边跨现浇段的支架，用于在桥梁件转体施工中完成对转体的桥梁件施工，边跨现浇段的支架的上端面为平台面，边跨现浇段的支架的下端位于支架支柱上，边跨现浇段的支架的一端与转体的桥梁件所在桥墩的相邻桥墩连接；The support of the side-span cast-in-place section is used to complete the construction of the bridge parts of the swivel body during the construction of the bridge parts. On the support pillar, one end of the support of the side-span cast-in-place section is connected to the adjacent pier of the pier where the bridge parts of the swivel are located;

临时支墩，用于在桥梁件转体施工中完成对转体的桥梁件施工，位于边跨现浇段的支架外侧。The temporary buttresses are used to complete the construction of the bridge parts of the swivel body in the construction of the bridge part swivel body, and are located outside the support of the cast-in-place section of the side span.

所述的激光投线仪与边跨梁端横断面的底板中线的垂线距离为2～4m。所述的激光投线仪与边跨梁端横断面的底板中线的垂线距离优选为3m。所述的激光投线仪投射出的水平线与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程。所述的激光投线仪为福田453DP型激光投线仪。所述的转体的桥梁件顺时针转动。The vertical distance between the laser line thrower and the center line of the bottom plate of the cross-section of the side-span beam end is 2-4m. The vertical distance between the laser line thrower and the center line of the bottom plate of the cross-section of the side-span beam end is preferably 3m. The horizontal line projected by the laser line projector is at the same elevation as the center line of the bottom plate of the side-span beam end cross-section of the swivel bridge. The laser line thrower is Futian 453DP laser line thrower. The bridge part of the swivel rotates clockwise.

上述方法和结构达到了本发明的目的。The above method and structure achieve the object of the present invention.

本发明的方法及其结构在桥梁体转体施中，具有桥梁体调整测量快、精度高、施工速度快、省工省力、施工成本低、安全性高、简单易学和普及性强的优点。用本发明的方法和结构可使梁体调整测量速度比用传统方法和结构时间缩矩90％；施工成本降低70％；施工速度提高2倍，无安全隐患；由于大幅度降低了桥梁体转体施工时间，不会影响既有铁路线运输安全。The method and structure of the present invention have the advantages of fast adjustment and measurement of the bridge body, high precision, fast construction speed, labor and labor saving, low construction cost, high safety, easy learning and strong popularization in the construction of the bridge body rotation. With the method and structure of the present invention, the measuring speed of the beam body can be adjusted and reduced by 90% compared with the traditional method and structure time; the construction cost is reduced by 70%; the construction speed is increased by 2 times, and there is no potential safety hazard; The overall construction time will not affect the transportation safety of existing railway lines.

附图说明Description of drawings

图1为本发明的总体施工结构示意图；Fig. 1 is the overall construction structure schematic diagram of the present invention;

图2为本发明的激光投线仪与桥梁件的边跨梁端横断面的局部结构示意图；Fig. 2 is the local structure schematic diagram of the side-span beam end cross-section of the laser line thrower of the present invention and the bridge;

图3为本发明的桥梁件转体过程状态结构示意图；Fig. 3 is a schematic diagram of the state structure of the bridge part of the present invention during the swivel process;

图4为本发明的转体前桥梁件的边跨梁端横断面的结构示意图；Fig. 4 is the structural representation of the side-span beam end cross-section of the swivel front bridge member of the present invention;

图5为本发明的纵轴线指针在桥梁件转体过程中运动状态结构示意图。Fig. 5 is a schematic structural diagram of the movement state of the longitudinal axis pointer of the present invention during the rotation of the bridge.

具体实施方案specific implementation plan

如图1至图5所示，一种桥梁转体施工精确对中控制施工方法，本发明利用激光投线仪2发出的垂直可见激光线在桥梁件4转体施工中完成对转体的桥梁件精确对中，包括如下步骤：As shown in Fig. 1 to Fig. 5, a bridge swivel construction accurate centering control construction method, the present invention utilizes the vertical visible laser line emitted by the laser line thrower 2 to complete the swivel bridge in the swivel construction of the bridge member 4 Precise alignment of parts, including the following steps:

(一)转体前，在转体的桥梁件的边跨梁端横断面3的底板上安装纵轴线指针9，并在边跨梁端横断面上标出与纵轴线指针垂直的标识线。(1) Before the rotation, install the longitudinal axis pointer 9 on the bottom plate of the side-span beam end cross-section 3 of the swivel bridge, and mark the marking line perpendicular to the longitudinal axis pointer on the side-span beam end cross-section.

(1)根据设计图纸，在转体的桥梁件的边跨梁端横断面的顶板上测量放样标出转体前轴线点A12。(1) According to the design drawings, measure and set out on the top plate of the side-span beam end cross-section of the bridge of the swivel body and mark the front axis point A12 of the swivel body.

(2)根据设计图纸，在转体的桥梁件的边跨梁端横断面的梁箱室内测量放样标出梁端底板转体前轴线点B14。(2) According to the design drawings, measure and set out in the beam box room of the side-span beam end cross-section of the swivel bridge parts and mark the front axis point B14 of the swivel bottom plate at the girder end.

(3)在边跨梁端断面的点A和点B之间用白线拉出梁体纵轴线的垂线13，根据垂线安装纵轴线指针9，所述的纵轴线指针为直径5mm，外露梁底50cm，在纵轴线指针安装时将纵轴线指针方向的外侧与梁体纵轴线的垂线平齐。(3) Pull out the vertical line 13 of the longitudinal axis of the beam body with a white line between point A and point B of the side-span beam end section, and install the longitudinal axis pointer 9 according to the vertical line. The longitudinal axis pointer is 5mm in diameter, and the exposed beam The bottom is 50cm. When the longitudinal axis pointer is installed, the outer side of the longitudinal axis pointer direction is flush with the vertical line of the longitudinal axis of the beam body.

(4)纵轴线指针的安装采用与转体的桥梁件的箱梁底板外露钢筋进行焊接，应焊接牢固，纵轴线指针采用直径5mm的钢钎，并外露梁底下50cm。保证与垂线偏差小于1mm。(4) The installation of the longitudinal axis pointer is to be welded with the exposed steel bars of the bottom plate of the box girder of the swivel bridge, which should be firmly welded. The longitudinal axis pointer adopts a steel drill with a diameter of 5mm and exposes 50cm below the beam. Ensure that the deviation from the vertical line is less than 1mm.

(5)在转体的桥梁件的边跨梁端横断面的底板上测量出底板的中线，并用墨线弹出，墨线为与纵轴线指针垂直的底板中线15，作为水平线标识。(5) Measure the center line of the bottom plate on the bottom plate of the side-span beam end cross-section of the swivel bridge, and pop it up with an ink line. The ink line is the center line 15 of the bottom plate perpendicular to the pointer of the longitudinal axis, as a horizontal line mark.

(二)激光投线仪的放置和校正。(2) Placement and calibration of the laser line projector.

(1)激光投线仪2对中位于转体的桥梁件转动圆周外的边跨现浇段的支架1上。可选用福田453DP型激光投线仪。支架下端由支架支柱7顶持固定。激光投线仪最佳对中放置在边跨现浇段的支架上，激光投线仪与边跨梁端横断面的底板中线的垂线距离优选为3m。调整该投线仪三脚螺旋，使该投线仪水平。(1) The laser line thrower 2 is centered on the support 1 of the cast-in-place section of the side span outside the rotation circle of the bridge of the swivel. Futian 453DP laser line projector can be selected. The lower end of the support is supported and fixed by the support pillar 7 . The laser line thrower is best centered and placed on the support of the side-span cast-in-place section, and the vertical distance between the laser line thrower and the center line of the bottom plate of the cross-section of the side-span beam end is preferably 3m. Adjust the tripod screw of the thread thrower to make the thread thrower level.

(2)激光投线仪投射出的水平线21与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程。(2) The horizontal line 21 projected by the laser line projection instrument is at the same elevation as the center line of the bottom plate of the side-span beam end cross-section of the swivel bridge.

(3)校正激光投线仪，使激光投线仪投射出的垂线和水平线(如图4中所标的十字虚线22)均能投射在边跨梁端横断面上，且与设计相同。以方便技术人员进行观察，最好使其垂线和水平线同时投射在底板断面上，并可清晰观察到。垂线和水平线的交叉点是加强点，便于对中观察，校正方法包括如下步骤：(3) Calibrate the laser line projection instrument so that the vertical and horizontal lines projected by the laser line projection instrument (the cross dotted line 22 marked in Figure 4) can be projected on the cross-section of the side span beam end, and are the same as the design. In order to facilitate the observation of technicians, it is best to make the vertical and horizontal lines projected on the bottom plate section at the same time, and can be clearly observed. The intersection of the vertical line and the horizontal line is a strengthening point, which is convenient for centering observation. The correction method includes the following steps:

(a)借助临时支墩6和边跨现浇段的支架作为挂设标线的平台，在借助临时支墩顶上的工字钢和边跨现浇段的支架上测量放样出桥梁件的连续梁设计纵轴线，并在临时支墩墩顶上的工字钢和边跨现浇段的支架上标记轴线点。(a) With the help of the temporary buttress 6 and the bracket of the cast-in-place section of the side span as a platform for hanging the marking line, measure the distance of the bridge piece by means of the I-beam on the top of the temporary buttress and the bracket of the cast-in-place section of the side span Design the longitudinal axis of the continuous beam, and mark the axis point on the I-beam on the top of the temporary buttress pier and the support of the cast-in-place section of the side span.

(b)在标记的两个轴线点上分别焊接直径10～13mm钢筋，钢筋顶部高出临时支墩墩顶45～55cm，并保证钢筋11竖直。(b) Weld steel bars with a diameter of 10-13 mm on the two marked axis points, the top of the steel bar is 45-55 cm higher than the top of the temporary pier, and ensure that the steel bar 11 is vertical.

(c)在两根焊接好的钢筋上挂设标线10。(c) Hang marking line 10 on the two welded steel bars.

(d)在两根焊接好的钢筋上挂设标线，对挂设好的标线进行校核，若发生轴线偏差则进行调整，直到轴线偏差小于1mm。(d) Hang marking lines on the two welded steel bars, check the hanging marking lines, and adjust if the axis deviation occurs until the axis deviation is less than 1mm.

(e)扭动激光投线仪的微调旋钮，使激光投线仪投射出的垂线与挂设的纵轴线的标线重合。(e) Twist the fine-tuning knob of the laser line thrower so that the vertical line projected by the laser line thrower coincides with the marking line of the hanging longitudinal axis.

(二)转体的桥梁件的对中过程控制。(2) The centering process control of the swivel bridge parts.

(1)转体时，在每个边跨现浇段的支架上搭设平台，并配备2名技术员对转体的桥梁件进行实时观察。(1) When rotating, build a platform on the support of each side span cast-in-place section, and equip 2 technicians to observe the rotating bridge in real time.

(2)当转体的桥梁件(如图3中虚线所示)即将就位时，技术人员通过测量转体的桥梁件端头上的纵轴线指针(如图5中虚线所示并标出的转体中的纵轴线指针91)与激光投线仪投射出的垂线的距离，用对讲机汇报给总指挥，通过点控调整，直至纵轴线指针与激光投线仪投射出的垂线重合(亦为钢筋上挂设标线位置)，停止转体的桥梁件转体。(2) When the bridge part of the swivel body (as shown by the dotted line in Figure 3) is about to be in place, the technician measures the pointer on the longitudinal axis on the end of the bridge part of the swivel body (as shown by the dotted line in Fig. The distance between the vertical axis pointer 91) in the swivel and the vertical line projected by the laser line projector is reported to the commander-in-chief with a walkie-talkie, and adjusted through point control until the vertical axis pointer coincides with the vertical line projected by the laser line projector (It is also the position where the marking line is hung on the steel bar) to stop the rotation of the bridge parts of the rotation.

(3)技术员用盒尺测量激光投线仪水平线与转体的桥梁件的底板中线之间的距离，为测量水平线偏距，可直接得到转体后桥梁件的梁端高程与设计值间的差值。若有水平线偏距，可通过千斤顶顶梁端调整使两者重合。最终可通过千斤顶顶梁端将梁端十字线(底板中线与纵轴线的垂线及纵轴线指针交叉形成)与激光投线仪的发出的十字线调整至重合，即完成转体的桥梁件的对中转体施工。(3) The technician uses a box ruler to measure the distance between the horizontal line of the laser line throwing instrument and the center line of the bottom plate of the swivel bridge. In order to measure the offset distance of the horizontal line, the distance between the beam end elevation of the swivel bridge and the design value can be directly obtained. difference. If there is a horizontal line offset, it can be adjusted through the top beam end of the jack to make the two overlap. Finally, the cross line at the beam end (formed by the intersection of the center line of the bottom plate and the vertical axis of the longitudinal axis and the pointer of the longitudinal axis) can be adjusted to coincide with the cross line emitted by the laser line throwing instrument through the top of the beam end of the jack, that is, to complete the rotation of the bridge. For the construction of the intermediate body.

(4)完成转体的桥梁件的对中转体施工，拆除激光投线仪和纵轴线指针。(4) Complete the centering construction of the swivel bridge parts, and remove the laser liner and the longitudinal axis pointer.

所述的激光投线仪应与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程，激光投线仪与边跨梁端横断面的底板中线的垂线距离为2～4m。所述的激光投线仪应与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程，激光投线仪与边跨梁端横断面的底板中线的垂线距离优选为3m。The laser line throwing instrument should be at the same elevation as the centerline of the bottom plate of the side-span beam end cross-section of the swivel bridge, and the vertical distance between the laser line throwing instrument and the bottom plate center line of the side-span beam end cross-section is 2-4m . The laser line thrower should be at the same elevation as the centerline of the bottom plate of the side-span beam end cross-section of the swivel bridge, and the vertical distance between the laser line thrower and the bottom plate center line of the side-span beam end cross-section is preferably 3m.

如图1至图5所示，一种实现桥梁转体施工精确对中控制施工方法的结构，包括：As shown in Figures 1 to 5, a structure that realizes the precise centering control construction method of bridge swivel construction includes:

激光投线仪2，用于在桥梁件转体施工中完成对转体的桥梁件精确对中控制。激光投线仪对中位于转体的桥梁件转动圆周外的边跨现浇段的支架上，激光投线仪投射出的水平线与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程。The laser line thrower 2 is used to complete the precise centering control of the bridge parts of the rotating body during the construction of the bridge parts. The laser line projection instrument is centered on the support of the side span cast-in-place section outside the rotation circle of the bridge component of the swivel body. same elevation.

转体的桥梁件，转体的桥梁件的边跨梁端横断面的底板上安装有纵轴线指针，转体的桥梁件的边跨梁端横断面上标出有与纵轴线指针垂直的白线，边跨梁端横断面的底板上设有底板中线。For the bridge parts of the swivel body, the longitudinal axis pointer is installed on the bottom plate of the side-span beam end cross-section of the swivel bridge parts, and the white mark perpendicular to the longitudinal axis pointer is marked on the side-span beam end cross-section of the swivel bridge parts. line, and the bottom plate of the cross-section of the side-span beam end is provided with the center line of the bottom plate.

边跨现浇段的支架1，用于在桥梁件转体施工中完成对转体的桥梁件施工，边跨现浇段的支架的上端面为平台面，边跨现浇段的支架的下端位于支架支柱上，边跨现浇段的支架的一端与转体的桥梁件所在桥墩5的相邻桥墩8连接。The support 1 of the side-span cast-in-place section is used to complete the construction of the bridge part of the swivel body during the construction of the bridge part rotation. Located on the support pillar, one end of the support of the side-span cast-in-place section is connected to the adjacent pier 8 of the pier 5 where the bridge part of the swivel is located.

临时支墩6，用于在桥梁件转体施工中完成对转体的桥梁件施工，位于边跨现浇段的支架外侧。The temporary support pier 6 is used to complete the construction of the bridge part of the swivel body during the construction of the swivel body of the bridge part, and is located outside the support of the cast-in-place section of the side span.

所述的激光投线仪与边跨梁端横断面的底板中线的垂线距离为2～4m。所述的激光投线仪与边跨梁端横断面的底板中线的垂线距离优选为3m。The vertical distance between the laser line thrower and the center line of the bottom plate of the cross-section of the side-span beam end is 2-4m. The vertical distance between the laser line thrower and the center line of the bottom plate of the cross-section of the side-span beam end is preferably 3m.

所述的激光投线仪投射出的水平线与转体的桥梁件的边跨梁端横断面的底板中线处于同一高程。The horizontal line projected by the laser line projector is at the same elevation as the center line of the bottom plate of the side-span beam end cross-section of the swivel bridge.

所述的激光投线仪为福田453DP型激光投线仪。The laser line thrower is Futian 453DP laser line thrower.

所述的转体的桥梁件顺时针转动。The bridge part of the swivel rotates clockwise.

施工时，视既有铁路线穿过桥墩5的相邻桥墩8之间。转体前，在转体的桥梁件的边跨梁端横断面的底板上安装纵轴线指针，并在边跨梁端横断面上标出与纵轴线指针垂直的底板中线。将桥梁件4斜向吊置在桥墩5上(如图3中虚线所示位置)，形成转体的桥梁件。在两桥墩之间设置支架支柱和临时支墩，边跨现浇段的支架1的下端位于支架支柱上，边跨现浇段的支架的一端与相邻桥墩8固定。使边跨现浇段的支架的上端面形成了可站人的平台，在平台上放置和校正激光投线仪。激光投线仪与边跨梁端横断面的底板中线的垂线距离优选为3m。调整该投线仪三脚螺旋，使该投线仪水平。依上述方法和步骤，顺时针转动、完成转体的桥梁件的对中转体施工，拆除激光投线仪和纵轴线指针。故不再累述。During construction, it is considered that the existing railway line passes between the adjacent piers 8 of the pier 5. Before the rotation, install the longitudinal axis pointer on the bottom plate of the side-span beam end cross-section of the swivel bridge, and mark the bottom plate center line perpendicular to the longitudinal axis pointer on the side-span beam end cross-section. The bridge piece 4 is suspended obliquely on the pier 5 (the position shown by the dotted line in Fig. 3 ) to form a swivel bridge piece. A support pillar and a temporary support pier are set between the two piers, the lower end of the support 1 spanning the cast-in-place section is located on the support pillar, and one end of the support of the cast-in-place section spanning the side is fixed to the adjacent pier 8. Make the upper end surface of the bracket spanning the cast-in-place section form a platform on which people can stand, and place and correct the laser line throwing instrument on the platform. The vertical distance between the laser line projection instrument and the center line of the bottom plate of the cross-section of the side-span beam end is preferably 3m. Adjust the tripod screw of the thread thrower to make the thread thrower level. According to the above method and steps, rotate clockwise to complete the centering construction of the bridge parts of the swivel, and remove the laser line projector and the longitudinal axis pointer. So I won't repeat it any more.

总之，本发明的方法及其结构在桥梁体转体施中，具有桥梁体调整测量快、精度高、施工速度快、省工省力、施工成本低、安全性高、简单易学和普及性强的优点。In a word, the method and its structure of the present invention have the advantages of fast bridge body adjustment and measurement, high precision, fast construction speed, labor and labor saving, low construction cost, high safety, easy to learn and strong popularization in the construction of bridge body rotation. advantage.

Claims (9)

1. a kind of Bridge Rotation Construction Technique precise alignment controls construction method, it is characterised in that：
The vertical visible laser line sent using laser level completes the bridge part essence to swivel in bridge part rotator construction True centering, comprises the following steps,
(1) before turning, longitudinal axis pointer is installed on the bottom plate in the end bay beam-ends cross section of the bridge part of swivel, and in end bay The tag line vertical with longitudinal axis pointer is marked on beam-ends cross section；
(1) according to design drawing, before surveying and locating marks swivel on the top plate in the end bay beam-ends cross section of the bridge part of swivel Axis point A；
(2) according to design drawing, surveying and locating marks beam-ends in the spar-box room in the end bay beam-ends cross section of the bridge part of swivel Axis point B before bottom plate swivel；
(3) vertical line of beam body longitudinal axis is pulled out with white line between the point A and point B of end bay beam-ends section, installs vertical according to vertical line Axis pointer, described longitudinal axis pointer is diameter 5mm, outer head beam bottom 50cm, refers to longitudinal axis when longitudinal axis pointer is installed The outside in pin direction is concordant with the vertical line of beam body longitudinal axis；
(4) installation of longitudinal axis pointer is welded using the box beam bottom plate exposed steel bar with the bridge part of swivel, should weld jail Gu, it is ensured that it is less than 1mm with the deviation of plumb line；
(5) center line of bottom plate is measured on the bottom plate in the end bay beam-ends cross section of the bridge part of swivel, and is ejected with the line of ink marker, ink Line is the bottom plate center line vertical with longitudinal axis pointer；
(2) placement and correction of laser level；
(1) laser level centering is located on the support of the end bay Cast-in-Situ Segment outside the bridge part turning circumference of swivel；
(2) horizontal line that laser level is projected and the bottom plate center line in the end bay beam-ends cross section of the bridge part of swivel are in same One elevation；
(3) calibration of laser level, makes the vertical line and horizontal line that laser level is projected to be incident upon end bay beam-ends cross-section On face, and it is identical with design, bearing calibration comprises the following steps,
(a) by the support of temporary rest pier and end bay Cast-in-Situ Segment as the platform for hanging graticule, on by temporary rest pier top Surveying and locating goes out the Continuous beam design longitudinal axis of bridge part on the support of I-steel and end bay Cast-in-Situ Segment, and in temporary rest pier pier top On I-steel and end bay Cast-in-Situ Segment support on mark axis point；
(b) it is respectively welded on two axis points of mark at the top of diameter 10~13mm reinforcing bars, reinforcing bar and is higher by temporary rest pier pier top 45~55cm, and ensure that reinforcing bar is vertical；
(c) graticule is hung on the reinforcing bar that two root beads are connected；
(d) graticule is hung on the reinforcing bar that two root beads are connected, the graticule hung is checked, entered if occurring misalignment of axe Row adjustment, until misalignment of axe is less than 1mm；
(e) vernier knob of laser level is twisted, makes the vertical line that laser level is projected and the graticule of the longitudinal axis hung Overlap；
(2) the centering process control of the bridge part of swivel；
(1) when turning, platform is set up on the support of each end bay Cast-in-Situ Segment, and be equipped with bridge part of 2 technicians to swivel Carry out Real Time Observation；
(2) when the bridge part of swivel will be in place, the longitudinal axis on bridge part termination of the technical staff by measuring swivel refers to The distance for the vertical line that pin is projected with laser level, commander in chief is reported to intercom, is adjusted by a control, until longitudinal axis Pointer is overlapped with the vertical line that laser level is projected, and stops the bridge part swivel of swivel；
(3) technician measures the distance between bottom plate center line of bridge part of laser level horizontal line and swivel with box chi, can The difference between the beam-ends elevation and design load of swivel back axle beam is directly obtained, can be by jack back timber end by beam-ends cross hairs Adjusted with the cross hairs that laser level is sent to overlapping；
(4) the centering rotator construction of the bridge part of swivel is completed, laser level and longitudinal axis pointer is removed.
2. a kind of Bridge Rotation Construction Technique precise alignment control construction method as described in claim 1, it is characterised in that：Described Laser level should be in same elevation with the bottom plate center line in the end bay beam-ends cross section of the bridge part of swivel, laser level with The vertical line distance of the bottom plate center line in end bay beam-ends cross section is 2~4m.
3. a kind of Bridge Rotation Construction Technique precise alignment control construction method as described in claim 2, it is characterised in that：Described Laser level should be in same elevation with the bottom plate center line in the end bay beam-ends cross section of the bridge part of swivel, laser level with The vertical line distance preferably 3m of the bottom plate center line in end bay beam-ends cross section.
4. a kind of centering realized described in claim 1 controls the structure of construction method, it is characterised in that：Including,
Laser level, for completing to control in the bridge part pair to swivel in bridge part rotator construction, laser level pair In be located on the support of the end bay Cast-in-Situ Segment outside the bridge part turning circumference of swivel, horizontal line that laser level is projected is with turning The bottom plate center line in the end bay beam-ends cross section of the bridge part of body is in same elevation；
Longitudinal axis pointer is installed on the bridge part of swivel, the bottom plate in the end bay beam-ends cross section of the bridge part of swivel, swivel Mark and set on the white line vertical with longitudinal axis pointer, the bottom plate in end bay beam-ends cross section on the end bay beam-ends cross section of bridge part There is bottom plate center line；
The support of end bay Cast-in-Situ Segment, for completing the bridge part construction to swivel, end bay Cast-in-Situ Segment in bridge part rotator construction The upper surface of support be flat surface, the lower end of the support of end bay Cast-in-Situ Segment is located in stent strut, the support of end bay Cast-in-Situ Segment One end be connected with the adjacent bridge pier of bridge pier where the bridge part turned；
Temporary rest pier, for completing the bridge part construction to swivel in bridge part rotator construction, positioned at the branch of end bay Cast-in-Situ Segment On the outside of frame.
5. the structure as described in claim 4, it is characterised in that：Described laser level and the bottom plate in end bay beam-ends cross section The vertical line distance of center line is 2~4m.
6. the structure as described in claim 5, it is characterised in that：Described laser level and the bottom plate in end bay beam-ends cross section The vertical line distance preferably 3m of center line.
7. the structure as described in claim 4, it is characterised in that：The horizontal line that described laser level is projected and swivel The bottom plate center line in the end bay beam-ends cross section of bridge part is in same elevation.
8. the structure as described in claim 4, it is characterised in that：Described laser level is Feitian 453DP type laser demarcations Instrument.
9. the structure as described in claim 4, it is characterised in that：The bridge part of described swivel is rotated clockwise.
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CN111794125B (en) * 2020-05-19 2021-12-24 陕西高速公路工程咨询有限公司 Adjusting device and method for controlling height difference of closure section of curved bridge
CN112556673A (en) * 2020-12-07 2021-03-26 北京市测绘设计研究院 Axial line vertical transmission measuring method and automatic receiving device for super high-rise building
CN116695570A (en) * 2023-06-07 2023-09-05 中铁七局集团有限公司 Construction method of up-span railway cast-in-situ beam

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