A method for positioning and paying out a profiled bridge

Abstract

The application relates to the technical field of bridge construction, in particular to a method for positioning and laying out of a special-shaped bridge, which comprises the following steps: obtaining the coordinates of any two points at the two ends of a same supporting beam at a construction site, marking the coordinates of the two points on a drawing; obtaining the intersection of the line segment and the bridge surface, the distances between the two points and the bridge surface respectively; and laying out on the site according to the intersection and the distances. The application can avoid the situation that the laying out can be realized only after multiple station changes due to the obstruction of the field of vision, can avoid the accumulated error due to the multiple station changes, can reduce the construction precision, can greatly improve the work efficiency by reducing the station changes, and can reduce the construction cost.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and more specifically, to a method for positioning and laying out irregularly shaped bridges. Background Technology

[0002] With the development of the construction industry, irregular bridge shapes are becoming more and more common, such as arched, curved, and curved bridges.

[0003] In the positioning work during bridge installation, such as Figure 3 As shown, the traditional end-point layout and positioning method cannot be used because the irregular shape of the bridge obstructs the view. It is necessary to use instruments to rotate the points multiple times to achieve the layout. Due to the multiple rotations, the layout cycle is long and the layout accuracy is greatly reduced. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for positioning and laying out irregular bridges; it can effectively realize the rapid positioning and laying out of irregular bridges, with fewer transfer stations and higher accuracy compared with the prior art, which greatly improves construction efficiency and reduces construction costs.

[0005] The solution adopted by this invention to solve the technical problem is:

[0006] A method for positioning and laying out irregular bridges involves obtaining the coordinates of any two points at both ends of the same support beam at the construction site and marking the coordinates of the two points on a drawing; connecting the two points to form a line segment, obtaining the intersection of the line segment with the bridge deck, and the distances between the two points and the bridge deck; and laying out the bridge on site based on the intersection and distances.

[0007] In some possible implementations,

[0008] Specifically, the following steps are included:

[0009] Step S1: Measure the coordinates of any two points at both ends of the same support beam along the transverse direction of the bridge and mark them on the drawing;

[0010] Step S2: Connect the two points to form a line segment, obtain the two intersection points formed by the line segment and the bridge surface, and measure the distance between the two points and the adjacent intersection point, as well as the distance between the two intersection points;

[0011] Step S3: Lay out the coordinate points on the corresponding support beam at the construction site and connect them; based on the distance between the two points and the adjacent intersection points on the drawing, and the distance between the two intersection points, perform positioning and layout on the support beam.

[0012] In some possible implementations,

[0013] Specifically, it also includes the following steps:

[0014] Step S4: repeating steps S1-S3 to loft the relative position of the bridge deck on all the support beams; completing the lofting.

[0015] In some possible implementations,

[0016] The step S1 specifically refers to:

[0017] A measuring instrument is installed on both sides of the bridge deck in the bridge longitudinal direction;

[0018] The coordinates of any two points at both ends of the support beam are obtained by the measuring instrument, and the two coordinates are marked on the drawing for marking.

[0019] In some possible implementations,

[0020] The measuring instrument is a total station.

[0021] In some possible implementations,

[0022] The step S3 specifically includes the following steps:

[0023] Step S31: Projecting any two points at both ends of the support beam on the horizontal plane where the top surface of the support beam is located to obtain two projection points;

[0024] Step S32: Connecting the two projection points;

[0025] Step S33: Marking on the line segment formed in step S32 according to the distance between the two points and the adjacent intersection on the drawing, and the distance between the two intersections, to obtain the relative position of the bridge deck and the support beam.

[0026] Compared with the prior art, the beneficial effects of the present application are:

[0027] The present application takes points on the end faces of the support beam in the bridge longitudinal direction, obtains three-dimensional coordinates, feeds back the three-dimensional coordinates to the drawing to obtain the positional relationship between the coordinate points and the bridge deck and the distance between the two intersections, and then loft the relative position relationship between the bridge deck and the support beam according to the coordinate points on the support beam on site. Compared with the prior art, the present application avoids the need for multiple station changes to achieve lofting due to visual obstruction, avoids the accumulated error due to multiple station changes, reduces the construction precision, improves the work efficiency by reducing the station changes, and reduces the construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a lofting schematic diagram of the present application;

[0029] Figure 2 is Figure 1 is an enlarged schematic view of A in FIG. 6;

[0030] Figure 3 The existing positioning and lofting schematic diagram. DETAILED DESCRIPTION

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in the present application do not represent any order, quantity or importance, but only distinguish different components. Similarly, "one" or "a" and the like do not represent a quantity limit, but represent the existence of at least one. In the implementation of the present application, the association relationship of the associated objects is described as "and / or", which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more. For example, multiple positioning columns refer to two or more positioning columns. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The present application will be described in detail below.

[0033] As Figures 1-2 shown:

[0034] A method for positioning and lofting of a special-shaped bridge, coordinates of any two points at two ends of the same support beam are obtained at the construction site, and the coordinates of the two points are marked on the drawing; connecting the two points forms a line segment, the intersection of the line segment and the bridge surface, and the distance between the two points and the side of the bridge surface close to each other are obtained; according to the intersection and the distance, lofting is carried out on site.

[0035] In some possible embodiments,

[0036] Specifically includes the following steps:

[0037] Step S1: Measure the coordinates of any two points at two ends of the same support beam along the transverse direction of the bridge, and mark on the drawing;

[0038] Step S2: connecting the two points to form a line segment, obtaining two intersection points formed by the line segment and the bridge surface, measuring the distance between the two points and the adjacent intersection points, and the distance between the two intersection points;

[0039] Step S3: setting out coordinate points on the corresponding support beam at the construction site and connecting; according to the distance between the two points and the adjacent intersection on the drawing and the distance between the two intersections; positioning and setting out on the support beam.

[0040] In some possible implementation manners,

[0041] Specifically, the method further comprises the following steps:

[0042] Step S4: repeating steps S1-S3 to set out the relative position of the bridge deck on all corresponding support beams; completing the setting out.

[0043] In some possible implementation manners,

[0044] Specifically, step S1 refers to:

[0045] A measuring instrument is installed on both sides of the bridge deck in the bridge longitudinal direction;

[0046] The coordinates of any two points at both ends of the same support beam are obtained by the measuring instrument, and the two coordinates are marked on the drawing for marking.

[0047] In some possible implementation manners,

[0048] The measuring instrument is a total station.

[0049] In some possible implementation manners,

[0050] Specifically, step S3 comprises the following steps:

[0051] Step S31: projecting any two points at both ends of the support beam on the horizontal plane where the top surface of the support beam is located to obtain two projection points;

[0052] Step S32: connecting the two projection points;

[0053] Step S33: according to the distance between the two points and the adjacent intersection on the drawing and the distance between the two intersections, marking on the line segment formed in step S32 to obtain the relative position of the bridge deck and the support beam.

[0054] Embodiment 1

[0055] A certain section of the bridge deck has an arch shape, and the traditional end setting out positioning method needs to be repeated several times to complete the setting out of the relative position of the bridge deck and the support beam;

[0056] Therefore, when setting out the construction, the relative position relationship between the bridge deck and the corresponding support beam is obtained by using the present application for setting out, which specifically comprises the following steps:

[0057] First, points are taken at both ends of the corresponding support beam of the bridge deck along the bridge longitudinal direction, such as Figure 1As shown, points A1, A2, A3, A4, A5, A6, A7, A8 are taken on the support beams arranged in sequence on the same side, and points B1, B2, B3, B4, B5, B6, B7, B8 are taken on the other side, and three-dimensional coordinates of the above points are obtained; wherein A1 and B1 are on the same support beam, and A8 and B8 are on the same support beam in the same way;

[0058] Subsequently, the three-dimensional coordinates of the above points are marked on the construction plan;

[0059] A1 and B1, A2 and B2, and A8 and B8 are connected to form eight line segments;

[0060] The above eight line segments will form 16 intersection points with the bridge deck, as shown in Figure 1 As shown, the distance between A1 and its adjacent intersection points is L1, the distance between B1 and its adjacent intersection points is Q1, and the distance between the two intersection points is E1; the distance between A2 and its adjacent intersection points is L2, the distance between B2 and its adjacent intersection points is Q2, and the distance between the two intersection points is E2; and in the same way, the distance between A8 and its adjacent intersection points is L8, the distance between B8 and its adjacent intersection points is Q8, and the distance between the two intersection points is E8;

[0061] According to the positions of the 16 points on site, the distances of the points and the distances between the intersection points are obtained; and the positional relationship between the bridge deck and the support beams is obtained;

[0062] The present application can also be used to review the bridge deck after installation, and the main review is as follows.

[0063] The present application is not limited to the foregoing specific embodiments. The present application extends to any novel feature or any new combination described in this specification, and any novel method or process steps or any new combination disclosed.

Claims

1. A method for positioning and laying out lines for irregularly shaped bridges, characterized in that, The coordinates of any two points at both ends of the same support beam are obtained at the construction site and marked on the drawings. The two points are connected to form a line segment, and the two intersection points formed by the line segment and the bridge deck are obtained. The distances between the two points and the adjacent intersection points, as well as the distance between the two intersection points, are measured. The layout is carried out on site based on the intersection points and distances.

2. The method for positioning and laying out irregularly shaped bridges according to claim 1, characterized in that, Specifically, the following steps are included: Step S1: Measure the coordinates of any two points at both ends of the same support beam along the transverse direction of the bridge and mark them on the drawing; Step S2: Connect the two points to form a line segment, obtain the two intersection points formed by the line segment and the bridge surface, and measure the distance between the two points and the adjacent intersection point, as well as the distance between the two intersection points; Step S3: Lay out the coordinate points on the corresponding support beam at the construction site and connect them; based on the distance between the two points and the adjacent intersection points on the drawing, and the distance between the two intersection points, perform positioning and layout on the support beam.

3. The method for positioning and laying out irregularly shaped bridges according to claim 2, characterized in that, Specifically, it also includes the following steps: Step S4: Repeat steps S1-S3 to lay out the relative positions of this section of the bridge deck on all the corresponding support beams; complete the layout.

4. The method for positioning and laying out irregularly shaped bridges according to claim 2, characterized in that, Step S1 specifically refers to: Install measuring instruments on both sides of the bridge deck in the direction of the bridge; The coordinates of any two points at both ends of the same support beam are obtained by measuring instrument, and the two coordinates are marked on the drawing.

5. The method for positioning and laying out irregularly shaped bridges according to claim 4, characterized in that, The measuring instrument is a total station.

6. The method for positioning and laying out irregularly shaped bridges according to claim 2, characterized in that, Step S3 specifically includes the following steps: Step S31: Project any two points at both ends of the support beam onto the horizontal plane where the top surface of the support beam is located, and draw two projection points; Step S32: Connect the two projection points; Step S33: Mark the distance between two points and their adjacent intersections on the drawing, and the distance between the two intersections, on the line segment formed in step S32 to obtain the relative position of the bridge deck and the supporting beam.

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