A method and device for installing and positioning the arch rib of an outward-inclined steel arch bridge

Abstract

The present invention relates to a method and a device for installing and positioning the arch rib of an outward-inclined steel arch bridge, which comprises the following steps: adjusting a cushion block to a preset position, wherein the cushion block is provided with a groove, and the inner cross section of the groove matches the cross-sectional shape of an arch rib segment; and embedding the arch rib segment into the groove of the cushion block. The cushion block can be adjusted instead of the arch rib segment, so the adjustment is simpler and the construction efficiency is improved. The construction cost of adjusting the arch rib is reduced while ensuring the positioning accuracy of the arch rib.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to an installation and positioning method and a positioning device for an arch rib of an outward-inclined steel arch bridge. Background Art

[0002] At present, the installation and positioning of arch rib segments is a crucial step in the construction process. Its success or failure will directly affect the line shape and appearance, and indirectly affect the force and even stability of the structure. For outward-inclined arch bridges, the installation and positioning of arch ribs is particularly important. Positioning deviation will make it difficult or impossible to close the joint. Elevation deviation will cause the hanger to be too long or too short and unable to install. Offset deviation will cause the outward inclination angle of the arch rib to change and affect the force and stability of the structure. Therefore, the precise positioning of the arch rib is crucial.

[0003] In related technologies, in order to ensure the accurate positioning of the arch rib segment, the coordinates of each measuring point on the arch rib are generally calculated first, and the posture of the arch rib segment is repeatedly adjusted to adjust each measuring point of the arch rib to the corresponding preset position, thereby ensuring the accuracy of the posture of the entire arch rib segment.

[0004] However, in recent years, with the progress of the times and the innovation of science and technology, bridges are generally used as local landmarks, and there are more and more landscape bridges with novel structures and peculiar shapes. For such bridges, the rods are often irregular and spatial structures. Not only are the theoretical coordinate calculations complicated, but it is also difficult to quickly adjust them in one or two round trips during the fine-tuning process, which wastes time and labor and machinery costs. Summary of the invention

[0005] The embodiment of the present invention provides an installation and positioning method and a positioning device for the arch rib of an outward-inclined steel arch bridge, so as to solve the problem in the related art that the installation and positioning of the outward-inclined steel arch bridge requires repeated adjustment of the arch rib segments.

[0006] In a first aspect, a method for installing and positioning the arch rib of an outward-inclined steel arch bridge is provided, which comprises the following steps: adjusting a cushion block to a preset position, wherein the cushion block is provided with a groove, and the inner cross-section of the groove matches the cross-sectional shape of the arch rib segment; and embedding the arch rib segment into the groove of the cushion block.

[0007] In some embodiments, adjusting the pad to a preset position and posture includes the following steps: analyzing to obtain the preset position and posture of the adjustment pad; using a total station to lay out the layout points of the pad in the preset position and posture; and adjusting the pad to the preset position and posture according to the layout points.

[0008] In some embodiments, the analysis to obtain a preset position of the adjustment pad includes the following steps: analyzing the pressure-bearing position of the pad, wherein when the arch rib is embedded in the groove, the pad is in a pressure-bearing position; analyzing the expected offset of the bracket when the arch rib segment is embedded in the groove, wherein the pad is supported on the bracket; and obtaining the preset position of the pad by combining the pressure-bearing position and the expected offset of the bracket.

[0009] In some embodiments, the analysis of the pressure-bearing posture of the pad includes the following steps: obtaining the arch rib cross-sectional coordinates of each control point according to the cross-sectional shape of the arch rib segment, wherein when the arch rib segment is embedded in the groove, the control point overlaps with the limit point of the inner wall of the groove; converting the arch rib cross-sectional coordinates of each control point into the geodetic coordinates of each control point; and obtaining the geodetic coordinates of the limit point of the pad under pressure according to the geodetic coordinates of each control point.

[0010] In some embodiments, the converting of the arch rib cross-sectional coordinates of each control point into the geodetic coordinates of each control point comprises the following steps: converting the arch rib cross-sectional coordinates of each control point into the bridge site engineering coordinates of each control point in combination with the camber angle of the arch rib segment; converting the bridge site engineering coordinates of each control point into the geodetic coordinates of each control point in combination with the azimuth of the bridge site engineering coordinate system relative to the geodetic coordinate system.

[0011] In some embodiments, the adjustment of the pad to a preset position includes the following steps: moving the transverse distribution beam along the direction in which the longitudinal distribution beam extends, the longitudinal distribution beam being mounted on a bracket, the transverse distribution beam being mounted on the longitudinal distribution beam, and the pad being mounted on the transverse distribution beam; moving the pad to a preset position along the direction in which the transverse distribution beam extends.

[0012] In some embodiments, before adjusting the pad block to a preset position, the following steps are also included: setting a bracket at the bottom of the arch rib segment line; setting two pad blocks on the bracket at intervals along the longitudinal bridge direction, wherein the two pad blocks are used to support the ends of different arch rib segments.

[0013] In some embodiments, embedding the arch rib segment into the groove of the pad block also includes the following steps: hoisting the arch rib segment to be installed; connecting one end of the arch rib segment to be installed with the installed arch rib segment; embedding the other end of the arch rib segment to be installed into the groove of the corresponding pad block.

[0014] In a second aspect, an outward-inclined positioning device for the arch rib of an arch bridge is provided, which includes: a pad, the pad is provided with a groove, the inner cross-section of the groove is used to match the cross-sectional shape of the arch rib segment, and the groove is used for the arch rib segment to be embedded.

[0015] In some embodiments, the positioning device further includes: a bracket, the bracket is used to be arranged below the arch rib segmentation line, at least two of the pads are provided on the bracket along the longitudinal bridge direction, and the two pads are respectively used to support the ends of two different arch rib segments.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include:

[0017] The embodiment of the present invention provides an installation and positioning method and positioning device for the arch rib of an outward-inclined steel arch bridge. Since the pad is provided with a groove matching the arch rib segment, the arch rib segment can be embedded in the groove to limit the arch rib segment. The position and posture of the groove can be adjusted by adjusting the pad, thereby controlling the position and outward-inclination angle of the arch rib segment. Compared with adjusting the arch rib segment, the pad has a relatively small mass and is less difficult to adjust. By adjusting the pad, the adjustment of the arch rib segment can be reduced or avoided, thereby improving construction efficiency and reducing construction time. Therefore, the pad can be adjusted instead of adjusting the arch rib segment, which makes adjustment simpler and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a positioning device for an outward-inclined steel arch bridge arch rib provided by an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the middle AA section;

[0021] Figure 3 It is a cross-sectional schematic diagram of the separation of the arch rib segment and the groove;

[0022] Figure 4 It is a schematic diagram of the coordinate transformation of the arch rib coordinates of a steel arch bridge relative to the engineering coordinates of the bridge;

[0023] Figure 5 It is a schematic diagram of the coordinate transformation of the engineering coordinates of the steel arch bridge relative to the geodetic coordinates;

[0024] Figure 6 A schematic diagram of the main structure of a positioning device for the arch rib of an outward-inclined steel arch bridge provided in an embodiment of the present invention.

[0025] In the figure:

[0026] 1. Pad; 11. Groove; 111. Limit point;

[0027] 2. Arch rib; 21. Arch rib segment; 211. Control point; 212. Control axis point; 22. Segment line;

[0028] 3. Bracket; 31. Longitudinal distribution beam; 32. Transverse distribution beam;

[0029] 4. Tie rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The embodiment of the present invention provides an installation and positioning method and a positioning device for the arch rib of an outward-inclined steel arch bridge, which can solve the problem in the related art that the installation and positioning of the outward-inclined steel arch bridge requires repeated adjustment of the arch rib segments.

[0032] See also Figures 1 to 3 and Figure 6 As shown, a method for installing and positioning the arch rib of an outward-inclined steel arch bridge is provided, and the steps include: adjusting the cushion block 1 to a preset posture, wherein the cushion block 1 is provided with a groove 11, and the inner cross section of the groove 11 matches the cross-sectional shape of the arch rib segment 21; and embedding the arch rib segment 21 into the groove 11 of the cushion block 1. That is, by providing a groove 11 matching the cross-sectional shape of the arch rib segment 21 on the cushion block 1, and embedding the arch rib segment 21 into the groove 11, the position of the arch rib segment 21 is limited by the groove 11. The position and angle of the arch rib segment 21 are limited by adjusting the position and angle of the cushion block 1. Compared with the arch rib segment 21, it is simpler to adjust the cushion block 1 with a lighter mass, and the hoisting can be completed without using a large hoisting machine, and the deflection of the arch rib segment 21 does not need to be considered during the adjustment process, and the adjustment is very simple. By adjusting the cushion block 1 to a preset posture, the posture of the arch rib segment 21 after installation can be ensured to be accurate, which reduces the difficulty of positioning the outward-inclined arch rib. In this embodiment, the cushion block 1 is formed by welding steel plates. In other embodiments, the cushion block 1 can be set as two parts separated from each other, wherein the groove 11 is set in the upper part of the cushion block 1, and the upper and lower parts of the cushion block 1 are connected by a hinge or a ball joint. In the process of adjusting the cushion block 1, the position of the cushion block 1 is adjusted first, and then the angle of the opening of the upper groove 11 is adjusted by adjusting the relative inclination of the upper and lower parts of the cushion block 1, and finally the posture of the cushion block 1 is determined by fixing the upper and lower parts. After adjusting the posture of the cushion block 1, the arch rib segment 21 is installed in the groove 11 of the cushion block 1. This avoids the need to adjust the posture of the arch rib segment 21 later.

[0033] See also Figures 1 to 3 and Figure 6 As shown, preferably, adjusting the pad 1 to a preset posture comprises the following steps: analyzing to obtain the preset posture of the adjustment pad 1; using a total station to lay out the layout points of the pad 1 in the preset posture; and adjusting the pad 1 to the preset posture according to the layout points. In other words, the posture of the pad 1 can be adjusted by the total station to assist in layout, so as to improve the accuracy of the posture adjustment of the pad 1. In this embodiment, the posture of the pad 1 is determined according to the design drawings of the bridge and the computer, and several layout points are laid out using the total station, and the pad 1 is adjusted to a suitable posture to ensure that the positioning point on the pad 1 overlaps with the layout point. Thereby, the posture adjustment of the pad 1 is completed.

[0034] See also Figure 1 , Figure 2 and Figure 6 As shown, preferably, the analysis to obtain the preset posture of the adjustment pad 1 includes the following steps: analyzing the pressure-bearing posture of the pad 1, wherein when the arch rib is embedded in the groove 11, the pad 1 is in the pressure-bearing posture; analyzing the expected displacement of the bracket 3 when the arch rib segment 21 is embedded in the groove 11, wherein the pad 1 is supported on the bracket 3; combining the pressure-bearing posture and the expected displacement of the bracket 3 to obtain the preset posture of the pad 1. That is to say, the pressure-bearing posture of the pad 1 when bearing pressure is first determined according to the installation state of the arch rib segment 21, and then the expected displacement of the bracket 3 under the pad 1 after the pad 1 is subjected to pressure is calculated, wherein after the pad 1 is subjected to pressure, the bracket 3 will sink downward due to the pressure of the arch rib segment 21, the pile foundation will be offset laterally or longitudinally, or there will be mutual displacement, and the platform will shift laterally, etc. In order to calculate the expected offset of the support 3 after the pad 1 is under pressure, it is necessary to use a total station to determine the real-time coordinates of the observation point, where the observation coordinates should be measured from two directions, and the expected offset of the support during this and subsequent construction processes is determined by measuring the offset deformation of the support 3 during the previous construction process. The accuracy of the predicted offset can be improved by collecting more and more construction data. By combining the offset after pressure, the accuracy of positioning can be improved, avoiding excessive positioning errors of the arch rib segment 21 due to the offset of the support 3. When there is a deviation in the vertical positioning, the arch rib segment 21 can also be adjusted to the designed position by adjusting the elevation of the pad 1 or the support 3. For example, the support 3 is set as a liftable platform, or a lifting unit is set at the bottom of the pad 1 to adjust the height of the pad 1.

[0035] See also Figures 1 to 5As shown, preferably, the analysis of the bearing posture of the cushion block 1 includes the following steps: obtaining the rib cross-sectional coordinates of each control point 211 according to the cross-sectional shape of the rib segment 21, wherein when the rib segment 21 is embedded in the groove 11, the control point 211 overlaps with the limit point 111 of the inner wall of the groove 11; converting the rib cross-sectional coordinates of each control point 211 into the geodetic coordinates of each control point 211; and obtaining the geodetic coordinates of the limit point 111 of the cushion block 1 under the bearing state according to the geodetic coordinates of each control point 211. In other words, the control point 211 is limited by the limit point 111, and the posture of the rib segment 21 can be controlled by combining multiple limit points 111. In this embodiment, the limit point 111 is determined by the control point 211 of the same cross section, which can reduce the difficulty of calculation. In other embodiments, the limit point 111 can also be determined by the control points 211 located in different cross sections to improve the accuracy of the groove 11 limit. Since the position and posture of the cushion block 1 are determined by the limit points 111 , the spatial points of each limit point 111 before bearing pressure can be laid out using the layout function of the total station, so that the position and posture of the cushion block 1 can be easily adjusted.

[0036] See also Figures 3 to 5 As shown, preferably, the conversion of the arch rib section coordinates of each control point 211 into the geodetic coordinates of each control point 211 includes the following steps: the arch rib section coordinates of each control point 211 are converted into the bridge engineering coordinates of each control point 211 in combination with the camber angle of the arch rib segment 21; the bridge engineering coordinates of each control point 211 are converted into the geodetic coordinates of each control point 211 in combination with the azimuth of the bridge engineering coordinate system relative to the geodetic coordinate system. Specifically, the coordinates of the control axis point 212 of the limit section of the arch rib segment 21 in the arch rib section are first calculated according to the arch axis equation of the bridge, and then the arch rib section coordinates of each control point are calculated in combination with the arch rib section shape and the coordinates of the control axis point 212.

[0037] In this embodiment, the coordinates of the control axis point can be obtained according to the arch axis equation as follows: 0 ,y 0 , z 0 ) There are three control points 211, which are respectively recorded as point A, point B and point C. Since the cross section of the arch rib segment 21 in this embodiment is an axisymmetric figure, point A is a symmetrical point between point B and point C.

[0038] The coordinates of points A, B, and C on the arch rib section are (x 1 ,y 1 , z 1 )、(x 2 ,y 2 , z 2 ) and (x 3 ,y 3 , z 3), where point A is located directly below the control axis point on the arch rib section and is 212h / 2 below the control axis point, and points BC are set on both sides of point A, and points ABC are at the same height, and the distance between points BC and point A is b / 2. The coordinates of ABC are marked as (x i ,y i , z i ), where i=1, 2, 3.

[0039] Then the coordinates of the three points ABC in the arch rib section can be calculated as follows:

[0040]

[0041] In order to facilitate the positioning of the total station, the coordinates in the arch rib section coordinate system need to be converted into the coordinates in the geodetic coordinate system, in which the bridge engineering coordinates can be used as intermediate transition coordinates. In the bridge engineering coordinate system, X represents the mileage coordinate, Y represents the axis coordinate, and Z represents the relative elevation coordinate. The camber angle α of the arch rib needs to be taken into account when converting the coordinates in the arch rib section coordinate system into the bridge engineering coordinate. In this embodiment, the arch rib is deflected around the x-axis by α, and the bridge engineering coordinates of the three points ABC can be obtained. Where i = 1, 2, 3, the calculation method is as follows:

[0042]

[0043] Since the bridge does not necessarily extend along the coordinate axis of the geodetic coordinates during the design process, the coordinate origin is often different. It is generally necessary to transform the bridge coordinate system into the geodetic coordinate system. The coordinate transformation needs to take into account the change of the coordinate origin and the azimuth between the geodetic coordinates and the bridge engineering coordinates. The coordinates of the origin of the geodetic coordinate system in the bridge engineering coordinate system are denoted as (dx, dy, 0), and the azimuth between the geodetic coordinate system and the bridge engineering coordinate system is denoted as β. Then, the coordinates of each control point 211ABC in the geodetic coordinate system can be obtained. Where i = 1, 2, 3, the calculation method is as follows:

[0044]

[0045] Through the above coordinate transformation, the coordinates of the control point 211 of the bridge arch rib segment 21 in the arch rib cross-section coordinate system can be transformed into coordinates in the geodetic coordinate system for the purpose of setting out by the total station.

[0046] See also Figure 1 and Figure 2As shown, preferably, the adjustment of the cushion block 1 to the preset position includes the following steps: moving the transverse distribution beam 32 along the direction in which the longitudinal distribution beam 31 extends, the longitudinal distribution beam 31 is installed on the bracket 3, the transverse distribution beam 32 is installed on the longitudinal distribution beam 31, and the cushion block 1 is installed on the transverse distribution beam 32; moving the cushion block 1 to the preset position along the direction in which the transverse distribution beam 32 extends. As shown in the figure, the longitudinal distribution beam 31 extends along the longitudinal bridge direction, and the transverse distribution beam 32 extends along the transverse bridge direction. In other words, the position of the cushion block 1 in the longitudinal bridge direction can be adjusted by moving the transverse distribution beam 32, and the position of the cushion block 1 in the transverse bridge direction can be adjusted by moving the transverse distribution beam 32. Then, the horizontal position of the cushion block 1 is adjusted. In this embodiment, the bracket 3 is supported by a steel pipe column, the pier bracket 3 is supported on the tie rod 4, and the connecting piece is connected by a steel pipe column, which mainly controls the welding quality of the steel pipe and the connecting piece, and controls the height, width and straightness of the weld joint of the steel pipe column. Among them, a double-jointed transverse distribution beam 32 can be provided on the longitudinal distribution beam 31. The pad 1, the transverse distribution beam 32 and the longitudinal distribution beam 31 can be connected by assembling them into groups on land. Then the whole assembly can be installed. Assembling them into groups on land can save a lot of construction time. When installing the bracket 3, the total station can be used to lay out the line to ensure the accurate position of the bracket 3.

[0047] See also Figure 1 and Figure 6 As shown, preferably, before the adjustment of the pad block 1 to the preset position, the following steps are also included: the bracket 3 is set at the bottom of the arch rib segment line 22; two pad blocks 1 are set on the bracket 3 along the longitudinal bridge direction, wherein the two pad blocks 1 are used to support the ends of different arch rib segments 21. In other words, the pad blocks 1 are set along the longitudinal bridge direction, and the pad blocks 1 support the ends of the arch rib segments 21. Since the pad blocks 1 are supported at the ends of the arch rib segments 21, the positioning accuracy of the arch rib segments 21 can be improved by positioning the arch rib segments 21 by the ends, compared with setting the pad blocks 1 at the center of the arch rib segments 21. See Figure 6 As shown, two arch rib segmentation lines are provided above the bracket 3 located at the center of the arch rib, and two pads 1 above the bracket 3 respectively support the ends of the arch rib segments 21 on both sides. The arch rib segment 21 located between the two arch rib segmentation lines 22 is directly connected to the arch rib segments 21 on both sides, and its bottom is not supported by the pad 1.

[0048] Preferably, the step of embedding the arch rib segment 21 into the groove 11 of the cushion block 1 further includes the following steps: hoisting the arch rib segment 21 to be installed; connecting one end of the arch rib segment 21 to be installed with the installed arch rib segment 21; embedding the other end of the arch rib segment 21 to be installed into the groove 11 of the corresponding cushion block 1. In other words, the arch rib segment 21 is first connected to the installed arch rib segment 21, and then the arch rib segment 21 is embedded in the groove 11 to achieve the positioning of the arch rib segment 21. In this embodiment, the arch rib segment 21 can be installed sequentially from the arch foot to the arch top. During installation, the arch rib is lifted to the air above the bracket 3 by a crawler crane, and the lower end of the arch rib segment 21 is installed so that the lower end of the arch rib segment 21 is aligned with the upper end of the installed arch rib segment 21. Then, the elevation, lateral displacement and inclination of the upper end of the arch rib segment 21 are adjusted by a lifting device so that the arch rib segment 21 can be embedded in the groove 11 of the corresponding pad 1, and the installation and positioning of the arch rib segment 21 are completed. During positioning, each control point 211 of the arch rib segment 21 needs to be aligned with the corresponding limit point 111 before adjustment. The limit point 111 and the control point 211 can be marked to facilitate alignment during the installation process.

[0049] See also Figures 1 to 3 as well as Figure 6 As shown, an outward-inclined positioning device for the arch rib of an arch bridge provided by an embodiment of the present invention comprises: a pad 1, wherein the pad 1 is provided with a groove 11, wherein the inner cross section of the groove 11 is used to match the cross-sectional shape of the arch rib segment 21, and the groove 11 is used for the arch rib segment 21 to be embedded. In other words, the position of the arch rib segment 21 is limited by the groove 11 of the pad 1, and the pad 1 can be adjusted to achieve that the arch rib segment 21 is in an accurate position after being embedded in the groove 11. Compared with repeatedly adjusting the arch rib segment 21, adjusting the pad 1 does not require the aid of large lifting tools, and the adjustment difficulty is lower. The adjustment cost is greatly reduced. In this embodiment, since the arch rib segment 21 is an octagon, the groove is set as an open slot body with three positioning inclined surfaces, and the positioning of the arch rib segment 21 can be ensured by the three positioning inclined surfaces. Since the groove 11 is an open slot body, the arch rib segment 21 can be conveniently embedded therein from top to bottom.

[0050] Preferably, the positioning device further includes: a bracket 3, the bracket 3 is used to be arranged below the arch rib segmentation line 22, at least two pads 1 are arranged on the bracket 3 along the longitudinal bridge direction, and the two pads 1 are respectively used to support the ends of two different arch rib segments 21. In other words, the pads 1 are supported by the bracket 3, and the pads 1 are arranged on the bracket 3 along the longitudinal bridge direction to achieve multi-point positioning of the arch rib 2 in the longitudinal bridge direction. Ensure the positioning accuracy of the arch rib 2. And the pads 1 are supported on the ends of the arch rib segments 21 to ensure accurate positioning of the ends and reduce the difficulty of docking between the arch rib segments 21.

[0051] The principles of the installation and positioning method and positioning device of the outward-inclined steel arch bridge arch rib provided by the embodiment of the present invention are as follows:

[0052] By adjusting the position of the cushion block 1, the position of the groove 11 is adjusted. When the arch rib segment 21 is embedded in the groove 11, the position of the arch rib segment 21 is limited by the position of the groove 11 to achieve the positioning of the arch rib segment 21. Since the position of the arch rib segment 21 can be adjusted by adjusting the position of the cushion block 1 instead of adjusting the position of the arch rib segment 21, the difficulty of adjusting the arch rib segment 21 is reduced. The construction efficiency is improved and the installation and positioning cost of the arch rib segment 21 is reduced.

[0053] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0054] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0055] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for installing and positioning an outward-inclined steel arch bridge arch rib, characterized in that: It includes the following steps: The cushion block (1) is adjusted to a preset position, wherein the cushion block (1) is provided with a groove (11), and the inner cross section of the groove (11) matches the cross section shape of the arch rib segment (21); Embedding the rib segment (21) into the groove (11) of the cushion block (1); The step of adjusting the cushion block (1) to a preset position comprises the following steps: Analyze and obtain the preset position and posture of the adjustment pad (1); The total station sets out the pad (1) at a set out point of a preset position; Adjusting the cushion block (1) to a preset position according to the layout point; The analysis to obtain the preset position and posture of the adjustment pad (1) comprises the following steps: Analyzing the pressure-bearing posture of the cushion block (1), wherein when the arch rib is embedded in the groove (11), the cushion block (1) is in the pressure-bearing posture; Analyzing the expected deflection of the bracket (3) when the rib segment (21) is embedded in the groove (11), wherein the pad (1) is supported on the bracket (3); The preset posture of the cushion block (1) is obtained by analyzing the pressure-bearing posture and the predicted offset of the bracket (3).

2. The method for installing and positioning the arch rib of an outward-inclined steel arch bridge according to claim 1, characterized in that: The analysis of the pressure-bearing posture of the cushion block (1) comprises the following steps: Obtaining the rib cross-sectional coordinates of each control point (211) according to the cross-sectional shape of the rib segment (21), wherein when the rib segment (21) is embedded in the groove (11), the control point (211) overlaps with a limiting point (111) on the inner wall of the groove (11); Converting the cross-sectional coordinates of the arch ribs of each control point (211) into the geodetic coordinates of each control point (211); The geodetic coordinates of the limit point (111) of the cushion block (1) in a pressure-bearing state are obtained according to the geodetic coordinates of each control point (211).

3. The method for installing and positioning the arch rib of an outward-inclined steel arch bridge according to claim 2, characterized in that: The step of converting the rib cross-section coordinates of each control point (211) into the geodetic coordinates of each control point (211) comprises the following steps: In combination with the camber angle of the arch rib segment (21), the arch rib cross-section coordinates of each control point (211) are converted into the bridge site engineering coordinates of each control point (211); The bridge engineering coordinates of each control point (211) are converted into the geodetic coordinates of each control point (211) in combination with the azimuth of the bridge engineering coordinate system relative to the geodetic coordinate system.

4. The method for installing and positioning the arch rib of an outward-inclined steel arch bridge according to claim 1, characterized in that: The step of adjusting the cushion block (1) to a preset position comprises the following steps: Moving the transverse distribution beam (32) along the extending direction of the longitudinal distribution beam (31), the longitudinal distribution beam (31) being mounted on the bracket (3), the transverse distribution beam (32) being mounted on the longitudinal distribution beam (31), and the pad (1) being mounted on the transverse distribution beam (32); The cushion block (1) is moved to a preset position along the direction in which the transverse distribution beam (32) extends.

5. The method for installing and positioning the arch rib of an outward-inclined steel arch bridge according to claim 1, characterized in that: Before adjusting the cushion block (1) to a preset posture, the following steps are also included: The bracket (3) is arranged at the bottom of the arch rib segment line (22); Two cushion blocks (1) are arranged on the support (3) at intervals along the longitudinal bridge direction, wherein the two cushion blocks (1) are used to support the ends of different arch rib segments (21).

6. The method for installing and positioning the arch rib of an outward-inclined steel arch bridge according to claim 1, characterized in that: The step of embedding the rib segment (21) into the groove (11) of the cushion block (1) further comprises the following steps: Hoisting the arch rib segment (21) to be installed; Connecting one end of the arch rib segment (21) to be installed to the installed arch rib segment (21); The other end of the arch rib segment (21) to be installed is embedded in the groove (11) of the corresponding cushion block (1).

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