CN108360389A - Inclined arch rib positioning device and positioning method - Google Patents

Abstract

The present invention discloses a positioning device and positioning method for inclined arch ribs, wherein the positioning device comprises a distribution beam, and a horizontal positioning unit and a vertical positioning unit are arranged on the distribution beam; the horizontal positioning unit comprises a first bottom plate, a second bottom plate, a first sliding plate, and a second sliding plate, and the vertical positioning unit comprises a first support plate and a second support plate; the first bottom plate and the second bottom plate are fixedly arranged horizontally at both ends of the distribution beam, the first sliding plate is fixedly arranged horizontally on the first bottom plate, the second sliding plate is fixedly arranged horizontally on the second bottom plate, the first support plate is fixedly arranged on the first sliding plate, and the second support plate is fixedly arranged on the second sliding plate; a V-shaped groove is provided on the top of the support plate. The present invention can complete preliminary positioning through the support plate, and the design elevation requirement of the positioning point can be achieved by cutting the V-shaped groove support plate, and the push slide plate can complete horizontal positioning, which is simple to operate, low in cost, small in required space, and high in positioning accuracy, and can be widely used in the positioning and installation of inclined arch ribs in actual engineering.

Description

An inclined arch rib positioning device and positioning method

technical field

The invention particularly relates to a positioning device and a positioning method for inclined arch ribs.

Background technique

New bridge structures are becoming more and more common in my country's current bridge construction, such as inward-inclining arch bridges and outward-inclining arch bridges. One difficulty with inclining or outward-inclining arch bridges is the positioning of the oblique arch ribs. If the positioning deviation of the arch rib is large, it will have a great impact on the force of the arched bridge, and then affect the safety of the structure.

In the actual positioning of inclined arch ribs, the commonly used method is to use a gantry crane for positioning. However, this method may be affected by approach bridges, steel pipe piles, and cross construction, making positioning impossible due to insufficient space. At the same time, this method is very difficult and time-consuming for precise adjustment. Due to the heavy weight of hoisting, complex spatial location, and high precision requirements, the positioning of inclined arch ribs is very time-consuming and expensive in actual hoisting.

Contents of the invention

The object of the present invention is to provide a positioning device and a positioning method for inclined arch ribs, which are simple in operation, low in cost, small in required space, and high in positioning accuracy, in view of the above-mentioned deficiencies in the prior art.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

An inclined arch rib positioning device, the end of the arch rib has a positioning point, and the positioning point includes a first positioning point on one side of the end of the arch rib and a second positioning point on the other side of the end of the arch rib, its characteristics It includes a distribution beam, and the distribution beam is provided with a horizontal positioning unit capable of positioning the positioning point in the horizontal direction, and a vertical positioning unit capable of positioning the positioning point of the arch rib in the vertical direction.

With the above-mentioned structure, when using the positioning device to position the inclined arch rib, adjust the horizontal positioning unit until the horizontal position of its positioning is consistent with the calculated horizontal position of the positioning point, and adjust the vertical positioning unit until the elevation of its positioning is consistent with the calculated The elevation of the positioning point is consistent, and then the contact point between the arch rib and the positioning device can be welded to facilitate the positioning of the inclined arch rib.

As a preferred manner, the horizontal positioning unit includes a first bottom plate, a second bottom plate, a first slide plate, and a second slide plate, and the vertical positioning unit includes at least one first support plate and at least one second support plate The first bottom plate is horizontally fixed on the upper surface of one end of the distribution beam, the second bottom plate is horizontally fixed on the upper surface of the other end of the distribution beam, the first sliding plate is horizontally fixed on the upper surface of the first bottom plate, and the second sliding plate is horizontally fixed on the upper surface of the other end of the distribution beam. fixed on the upper surface of the second bottom plate, the first supporting plate is vertically fixed on the upper surface of the first sliding plate, and the second supporting plate is vertically fixed on the upper surface of the second sliding plate; the top edge of the second supporting plate is opposite to the second The elevation of the bottom plate is greater than the elevation of the top edge of the first support plate relative to the first bottom plate; the top of the first support plate is opened to support and accommodate the first V-shaped groove at the bottom of the arch rib, and the top of the second support plate is opened to support and accommodate The second V-shaped groove at the bottom of the arch rib; the elevation of the apex of the first V-shaped groove relative to the first bottom plate is greater than the elevation of the first positioning point relative to the first bottom plate, and the elevation of the apex of the second V-shaped groove relative to the second bottom plate is greater than The elevation of the second anchor point relative to the second bottom plate.

With the above structure, when the elevation of the positioning position of the inclined arch rib needs to be fine-tuned, the first V-shaped groove on the first support plate and the second V-shaped groove on the second support plate can be cut. When the horizontal position of the inclined arch rib needs to be fine-tuned, the first sliding plate and the second sliding plate can be pushed. It can be seen that the preliminary positioning with high precision can be completed through the first support plate and the second support plate. In the adjustment process, only the V-shaped groove support plate can be cut to meet the design elevation requirements of the positioning point, which can be completed by pushing the sliding plate. The horizontal positioning of the positioning point has simple operation, low cost, small required space and high positioning accuracy, and can be widely used in the positioning and installation of inclined arch ribs in actual engineering.

Wherein, the elevation of the first V-shaped groove apex relative to the first base plate is greater than the elevation (preferably high 3 cm) of the first positioning point relative to the first base plate, and the elevation of the second V-shaped groove apex relative to the second base plate is greater than the second The elevation of the positioning point relative to the second base plate (preferably 3 cm high), to take into account existing errors.

Further, the vertical positioning unit further includes a column and a backing plate, the second support plate is fixedly connected to the sliding plate through the backing plate, the column and the sliding plate in sequence, and the backing plate is horizontally arranged above the sliding plate.

Further, it also includes a first diagonal brace, one end of the first diagonal brace is fixedly connected with the column, and the other end of the first diagonal brace is fixedly connected with the distribution beam.

The first diagonal brace can enhance the lateral stability of the arch rib.

As a preferred manner, the center point of the backing plate is on the same vertical line as the center point of the first sliding plate, and the center point of the first sliding plate is located on the vertical axis of the column.

As a preferred manner, the number of the first support plates is 3, the number of the second support plates is 3, each first support plate is evenly distributed on the first sliding plate, each second support plate is evenly distributed on the On the backing plate; the center of the bottom surface of the first sliding plate in the middle is on the same vertical line as the first positioning point, and the center of the bottom surface of the second sliding plate in the middle is on the same vertical line as the second positioning point.

Further, when the inclined arch rib is an inwardly inclined arch rib, it also includes a second diagonal brace, one end of the second diagonal brace abuts against the inner surface of the arch rib, and the other end of the second diagonal brace abuts against the bridge deck .

The second diagonal brace can improve the anti-tilting ability of the arch rib and improve the stability of the arch rib.

As a preferred manner, the side of the first bottom plate is fixed with a first baffle plate used to prevent the first sliding plate from detaching from the first bottom plate, and the side of the second bottom plate is fixed to prevent the second sliding plate from detaching from the second bottom plate the second baffle.

The first baffle and the second baffle can more effectively fix the lateral offset of the arch rib.

As a preferred method, a third baffle plate is fixed on the distribution beam, the third baffle plate is located on one side of the first support plate, and the second support plate is located on the other side of the first support plate, further improving the lateral resistance of the arch rib. Pour ability.

As a preferred method, the elevation of the distribution beam is 0.5m lower than the elevation of the positioning point to install other adjustable components.

As a preferred method, the top elevation of the first sliding plate located in the middle is 10cm higher than the design elevation of the first positioning point, and the top elevation of the second sliding plate located in the middle is 10cm higher than the design elevation of the second positioning point, so as to embedding Fixed site.

Based on the same inventive concept, the present invention also provides a method for positioning an inclined arch rib using the inclined arch rib positioning device, comprising the following steps:

Step A. Calculate the location of the anchor point of the arch rib;

Step B. According to the position of the positioning point determined in step A, use the positioning device to position the inclined arch rib. During the positioning process, adjust the horizontal positioning unit until the horizontal position of its positioning is consistent with the calculated horizontal position of the positioning point, and adjust the vertical positioning The elevation of the cell up to its location coincides with the calculated location elevation;

Step C. Weld the contact points of the arch rib and the positioning device.

As a preferred method, the step A includes:

Step A1. Calculate the coordinates of any point on the arch axis in the oblique plane of the arch axis when the pre-arch is not considered. When the pre-arch is not considered, the origin of the reference coordinate system is the vault top, the x direction is along the span direction, the z direction is along the sagittal direction, and the y The direction is determined according to the right-hand spiral rule, then:

In the formula, (x ₀ , y ₀ , z ₀ ) is the coordinate of any point on the arch axis without considering the pre-arch in the reference coordinate system, f is the vector height, m is the coefficient of the arch axis, l ₁ is the half-span diameter,

Step A2. Calculate the coordinates of any point on the cross-section of the arch rib when the pre-arch is not considered in the inclined plane of the arch axis, then:

In the formula, (x ₁ , y ₁ , z ₁ ) is the coordinate of any point on the arch rib section without considering the pre-arching in the reference coordinate system, h is the distance between the obtained point on the arch rib section and the center point of the arch rib section, a is the horizontal distance from the point on the arch rib section to the center line of the arch rib section, α is the horizontal angle of the point on the arch rib section, and θ is the inclination angle of the arch rib;

Step A3. Calculate the coordinates of any point on the arch rib in the positive plane of the arch axis after considering the pre-camber, that is, the coordinates of the positioning point. After considering the pre-camber, the origin of the reference coordinate system is the vault on the positive plane of the arch, and the x direction is along the span direction , the z direction is along the sagittal height direction, and the y direction is determined according to the right-hand spiral rule, then:

In the formula, (x, y, z) is the coordinates of the anchor point of the arch rib, Δz _y is the pre-camber in the direction of the oblique plane of the arch axis, and b is the offset distance between the centerline of the bridge deck and the line connecting the arch rib arch foot;

Step A4. Determine the location of the anchor point according to the coordinates of the anchor point calculated in step A3.

Further, when the inclined arch rib is an inwardly inclined arch rib, step D is also included. Using the second diagonal brace to support the upper part of the arch rib, the material strength of the second diagonal brace is determined by the formula σ _c =M/HA _x , where , σ _c is the axial stress of the second brace, M is the roll bending moment of the arch rib under its own weight, H is the center distance between the top plate of the arch rib and the bottom plate of the arch rib, A _x is the cross-sectional area of the second brace .

Compared with the prior art, the beneficial effect of the present invention is that the preliminary positioning with high precision can be completed through the first support plate and the second support plate, and the positioning can be achieved by only cutting the V-shaped groove support plate during the adjustment process According to the design elevation requirements of the point, the horizontal positioning of the positioning point can be completed by pushing the sliding plate. The operation is simple, the cost is low, the required space is small, and the positioning accuracy is high. It can be widely used in the positioning and installation of inclined arch ribs in actual projects.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of an inclined arch rib positioning device of the present invention.

Fig. 2 is a schematic structural diagram of related components at the first sliding plate of the present invention.

Fig. 3 is a schematic diagram of the working state of the inclined arch rib positioning device of the present invention.

Among them, 1 is the distribution beam, 2 is the first bottom plate, 3 is the second bottom plate, 4 is the first sliding plate, 5 is the second sliding plate, 6 is the first support plate, 601 is the first V-shaped groove, 7 is The second support plate, 701 is the second V-shaped groove, 8 is the column, 9 is the backing plate, 10 is the arch rib, 11 is the first diagonal brace, 12 is the second diagonal brace, 13 is the first baffle plate, 14 is The second baffle plate, 15 is the third baffle plate.

Detailed ways

The end of the arch rib 10 has an anchor point, and the anchor point includes a first anchor point on one side of the end of the arch rib 10 and a second anchor point on the other side of the end of the arch rib 10, as shown in Figures 1 to 3 As shown, the inclined arch rib positioning device includes a group of stable distribution beams. The distribution beam 1 is provided with a horizontal positioning unit that can position the positioning point in the horizontal direction, and a vertical positioning unit that can position the positioning point of the arch rib 10 in the vertical direction. unit.

The horizontal positioning unit includes a first base plate 2, a second base plate 3, a first slide plate 4, and a second slide plate 5, and the vertical positioning unit includes three first support plates 6 and three second support plates 7 The first bottom plate 2 is horizontally welded to the upper surface of one end of the distribution beam 1, the second bottom plate 3 is horizontally welded to the upper surface of the other end of the distribution beam 1, and the first sliding plate 4 is fixed to the upper surface of the first bottom plate 2 by spot welding horizontally , the second sliding plate 5 is fixed on the upper surface of the second bottom plate 3 by spot welding horizontally, the first supporting plate 6 is welded and fixed on the upper surface of the first sliding plate 4, and the second supporting plate 7 is vertically welded on the second sliding plate 5 Surface; the elevation of the top edge of the second support plate 7 relative to the second bottom plate 3 is greater than the elevation of the top edge of the first support plate 6 relative to the first bottom plate 2; the top of the first support plate 6 is opened to support and accommodate the bottom of the arch rib 10 The first V-shaped groove 601, the top of the second support plate 7 is opened to support and accommodate the second V-shaped groove 701 at the bottom of the arch rib 10; the elevation of the top of the first V-shaped groove 601 relative to the first bottom plate 2 is greater than the first The elevation of the positioning point relative to the first bottom plate 2 , and the elevation of the apex of the second V-shaped groove 701 relative to the second bottom plate 3 are greater than the elevation of the second positioning point relative to the second bottom plate 3 .

The center points of the first bottom plate 2 and the first sliding plate 4 are all on the same vertical line with the first positioning point, and the center points of the second bottom plate 3 and the second sliding plate 5 are all on the same vertical line with the second positioning point superior.

The vertical positioning unit also includes a column 8 and a backing plate 9, the second support plate 7 is welded and fixed to the sliding plate through the backing plate 9, the column 8 in turn, and the backing plate 9 is horizontally arranged above the sliding plate.

The inclined arch rib positioning device also includes a first diagonal brace 11 , one end of the first diagonal brace 11 is fixedly connected with the welding column 8 , and the other end of the first diagonal brace 11 is welded and fixed with the distribution beam 1 .

The center point of the backing plate 9 is on the same vertical line as the center point of the first sliding plate 4 , and the center point of the first sliding plate 4 is located on the vertical axis of the column 8 .

Each first support plate 6 is evenly distributed on the first sliding plate 4, and each second support plate 7 is evenly distributed on the backing plate 9; the center of the bottom surface of the first sliding plate 4 in the middle is at the same vertical position as the first positioning point. On the straight line, the center of the bottom surface of the second sliding plate 5 in the middle is on the same vertical line as the second positioning point.

The positioning device of the present invention is suitable for inwardly inclined arch ribs and outwardly inclined arch ribs.

When the inclined arch rib 10 is an inward inclined arch rib, it also includes a second diagonal brace 12, one end of the second diagonal brace 12 is in contact with the inner surface of the arch rib 10, and the other end of the second diagonal brace 12 is in contact with the bridge deck. meet each other.

The inclination angle of the line connecting the apexes of the first V-shaped grooves 601 on the first support plate 6 and the apexes of the second V-shaped grooves 701 on the second support plate 7 is consistent with the inclination angle of the arch rib 10 .

The corresponding sides of the cutouts of the first V-shaped groove 601 and the second V-shaped groove 701 are parallel to each other.

The side of the first base plate 2 is welded with two first baffle plates 13 for preventing the first sliding plate 4 from breaking away from the first base plate 2, and the side of the second base plate 3 is welded with two pieces for preventing the second sliding plate 5 from detaching from the first base plate 2. The second baffle plate 14 from which the second bottom plate 3 is separated.

A third baffle plate 15 is fixed on the distribution beam 1 , the third baffle plate 15 is located on one side of the first support plate 6 , and the second support plate 7 is located on the other side of the first support plate 6 .

The elevation of the distribution beam 1 is 0.5m lower than the elevation of the positioning point.

The top elevation of the first slide plate 4 located in the middle is 10 cm higher than the design elevation of the first anchor point, and the top elevation of the second slide plate 5 located in the middle is higher than the design elevation of the second anchor point by 10 cm.

During use, a set of said positioning devices are respectively arranged at the two ends of the arch rib 10 (that is, the arch foot and the arch top).

The method for positioning the inclined arch rib 10 by using the inclined arch rib positioning device includes the following steps:

Step A. Calculating the position of the anchor point of the arch rib 10 . The position of the anchor point of the arch rib 10 can be obtained by establishing a three-dimensional rectangular coordinate system or a polar coordinate system.

Step B. According to the position of the positioning point determined in step A, use the positioning device to position the inclined arch rib 10. During the positioning process, adjust the horizontal positioning unit until the horizontal position of its positioning is consistent with the calculated horizontal position of the positioning point, and adjust the vertical position. The elevation of the positioning unit up to its positioning corresponds to the calculated elevation of the positioning point.

Specifically, step B includes:

First, according to the calculated position of the positioning point of the arch rib 10, hoist the arch rib 10 into the first V-shaped groove 601 of the first support plate 6 and the second V-shaped groove 701 of the second support plate 7, and ensure as much as possible The positioning point coincides with the tip of the V-shaped notch of the middlemost support plate to complete the preliminary positioning.

Then, when the horizontal position of the positioning does not match the design value, cut the first sliding plate 4 and the second sliding plate 5 fixed by spot welding with a hand grinder, and then use a jack to push the first sliding plate 4 and the second sliding plate 5 to the proper location and welded.

Finally, due to the consideration of the error adjustment, there is generally only a situation where the elevation of the positioning point is higher than the design value. At this time, the first V-shaped groove 601 and the second V-shaped groove 701 are cut to the design elevation by flame.

In the positioning process, the precise positioning of the arch foot end is given priority, and then the arch top is precisely positioned.

Step C. When both ends are positioned in proper positions, weld the contact points between the arch rib 10 and the positioning device, that is, weld all the contact points between the positioning points and the first support plate 6 and the second support plate 7 dead.

Described step A comprises:

Step A1. Calculate the coordinates of any point on the arch axis in the oblique plane of the arch axis when the pre-arch is not considered. When the pre-arch is not considered, the origin of the reference coordinate system is the vault top, the x direction is along the span direction, the z direction is along the sagittal direction, and the y The direction is determined according to the right-hand spiral rule, then:

In the formula (1), (x ₀ , y ₀ , z ₀ ) is the coordinate of any point on the arch axis in the reference coordinate system when no pre-arch is considered, f is the vector height, m is the coefficient of the arch axis, and l ₁ is the half-span ,

Step A2. Calculate the coordinates of any point on the section of the arch rib 10 when the pre-arch is not considered in the inclined plane of the arch axis, then:

In the formula (2), (x ₁ , y ₁ , z ₁ ) is the coordinate of any point on the section of the arch rib 10 without considering the pre-arch in the reference coordinate system, and h is the distance from the point on the section of the arch rib 10 to the arch rib 10 The distance of the center point of the section, a is the horizontal distance from the center line of the arch rib 10 section to the point on the arch rib 10 section, α is the horizontal angle of the point on the arch rib 10 section, and θ is the inclination angle of the arch rib 10;

Step A3. Calculate the coordinates of any point on the arch rib 10 in the positive plane of the arch axis after considering the pre-camber, that is, the coordinates of the anchor point. After considering the pre-camber, the origin of the reference coordinate system is the vault of the arch positive plane, and the x direction is along the span direction, the z direction is along the sagittal height direction, and the y direction is determined according to the right-hand spiral rule, then:

In formula (3), (x, y, z) are the coordinates of the anchor point of the arch rib 10, Δz _y is the pre-camber in the direction of the oblique plane of the arch axis, b is the deflection of the line connecting the center line of the bridge deck and the arch foot of the arch rib 10 distance or horizontal offset from the vault;

Step A4. Determine the location of the anchor point according to the coordinates of the anchor point calculated in step A3.

In order to ensure sufficient safety, the lateral stress of the arch rib 10 should be determined, and the material type of the first support plate 6 and the second support plate 7 should be determined in advance. When the inclined arch rib 10 is an inward arch rib, the method as follows,

First, calculate the lateral force and corresponding stress at the support point inside the inclined arch rib 10 . In order to simplify the calculation and consider a certain safety margin, it is assumed that the lateral component of the self-weight of the arch rib 10 is entirely borne by the first support plate 6 , while the bearing effect of the second support plate 7 is ignored. At the same time, if the arch rib 10 is simplified as an inclined three-dimensional plane plate, then the formula is:

σ _v =F _y /nl<σ _f (5)

In formulas (4) and (5), F _y is the lateral force at the inner support point, G is the self-weight of the arch rib 10, n is the section width of the V-shaped notch, l is the section length of the V-shaped notch, σ _v is the calculated stress of the first support plate 6 , and σ _f is the material yield strength of the first support plate 6 .

When the calculated stress is greater than the yield stress, the first support plate 6 and the second support plate 7 with higher strength should be selected; when the calculated stress is less than the yield stress, the next step can be carried out.

The inclined arch rib 10 needs to be considered to have sufficient stability during installation. The roll bending moment of the arch rib 10 is mainly controlled by the bending moment of the top plate of the arch rib 10 and the bottom plate of the arch rib 10, and its magnitude is shown in formula (6). For this reason, when the inclined arch rib 10 is an inwardly inclined arch rib, a step D is also included. Using the second diagonal brace 12 to support the inner surface of the arch rib 10 to improve the stability of the arch rib 10 . The material strength of the second brace 12 is determined by formula (8).

M＝G _t G _b Hsin ² θ (6)

σ _c =M/HA _x (7)

Among them, σ _c is the axial stress of the second brace 12, M is the roll bending moment of the arch rib 10 under its own weight, G _t is the self-weight of the top plate of the arch rib 10, and G _b is the self-weight of the bottom plate of the arch rib 10, H is the center distance between the top plate of the arch rib 10 and the bottom plate of the arch rib 10, _{and Ax} is the cross-sectional area of the second brace 12.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than limiting, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection scope of the present invention.

Claims (10)

1. an inclined arch rib positioning device, the end of the arch rib (10) has a positioning point, and the positioning point comprises the first positioning point on one side of the end of the arch rib (10) and the end of the arch rib (10) The second positioning point on the other side is characterized in that it includes a distribution beam (1), and the distribution beam (1) is provided with a horizontal positioning unit that can locate the positioning point of the arch rib (10) in the horizontal direction, and can be positioned vertically. The direction is a vertical positioning unit for positioning the positioning point of the arch rib (10). 2. The inclined arch rib positioning device according to claim 1, characterized in that, said horizontal positioning unit comprises a first bottom plate (2), a second bottom plate (3), a first sliding plate (4), a second sliding plate (5), the vertical positioning unit includes at least one first support plate (6) and at least one second support plate (7); the first bottom plate (2) is horizontally fixed at one end of the distribution beam (1) The upper surface, the second bottom plate (3) is horizontally fixed on the upper surface of the other end of the distribution beam (1), the first sliding plate (4) is horizontally fixed on the upper surface of the first bottom plate (2), and the second sliding plate (5 ) is horizontally fixed on the upper surface of the second bottom plate (3), the first supporting plate (6) is vertically fixed on the upper surface of the first sliding plate (4), and the second supporting plate (7) is vertically fixed on the second sliding plate plate (5) upper surface; the elevation of the second support plate (7) top edge relative to the second bottom plate (3) is greater than the elevation of the first support plate (6) top edge relative to the first bottom plate (2); the first support The top of the plate (6) is provided with a first V-shaped groove (601) for supporting and accommodating the bottom of the arch rib (10), and the top of the second support plate (7) is provided with a second groove for supporting and accommodating the bottom of the arch rib (10). V-shaped groove (701); the elevation of the apex of the first V-shaped groove (601) relative to the first base plate (2) is greater than the elevation of the first positioning point relative to the first base plate (2), and the second V-shaped groove (701) The elevation of the apex relative to the second bottom plate (3) is greater than the elevation of the second positioning point relative to the second bottom plate (3). 3. The inclined arch rib positioning device according to claim 2, characterized in that, the vertical positioning unit also includes a column (8) and a backing plate (9), and the second support plate (7) passes through the backing plate in turn. The plate (9), the column (8) are fixedly connected with the slide plate, and the backing plate (9) is horizontally arranged above the slide plate. 4. The positioning device for inclined arch ribs as claimed in claim 3, further comprising a first diagonal brace (11), one end of the first diagonal brace (11) is fixedly connected with the column (8), and the first diagonal brace The other end of (11) is fixedly connected with distribution beam (1). 5. inclined arch rib locating device as claimed in claim 3, is characterized in that, the central point of described backing plate (9) and the central point of first sliding plate (4) are on the same vertical straight line, and the first sliding The center point of the plate (4) lies on the vertical axis of the column (8). 6. The positioning device for inclined arch ribs as claimed in claim 3, characterized in that, the number of the first support plates (6) is 3, the number of the second support plates (7) is 3, each first The supporting plates (6) are evenly distributed on the first sliding plate (4), and each second supporting plate (7) is evenly distributed on the backing plate (9); One positioning point is on the same vertical line, and the center of the bottom surface of the second sliding plate (5) located in the middle is on the same vertical line as the second positioning point. 7. The inclined arch rib positioning device according to any one of claims 1 to 6, characterized in that, when the inclined arch rib (10) is an inwardly inclined arch rib, it further comprises a second diagonal brace (12), One end of the second diagonal brace (12) abuts against the inner surface of the arch rib (10), and the other end of the second diagonal brace (12) abuts against the bridge deck. 8. A method for locating an inclined arch rib (10) using an inclined arch rib positioning device as claimed in any one of claims 1 to 7, characterized in that it comprises the following steps: Step A. calculate arch rib (10) anchor point position; Step B. According to the position of the positioning point determined in step A, use the positioning device to position the inclined arch rib (10). During the positioning process, adjust the horizontal positioning unit until the horizontal position of its positioning is consistent with the calculated horizontal position of the positioning point. Adjust The elevation of the vertical positioning unit until its positioning is consistent with the calculated elevation of the positioning point; Step C. Weld the contact point of the arch rib (10) and the positioning device. 9. The inclined arch rib positioning method according to claim 8, wherein said step A comprises: Step A1. Calculate the coordinates of any point on the arch axis in the oblique plane of the arch axis when the pre-arch is not considered. When the pre-arch is not considered, the origin of the reference coordinate system is the vault top, the x direction is along the span direction, the z direction is along the sagittal direction, and the y The direction is determined according to the right-hand spiral rule, then: In the formula, (x ₀ , y ₀ , z ₀ ) is the coordinate of any point on the arch axis without considering the pre-arch in the reference coordinate system, f is the vector height, m is the coefficient of the arch axis, l ₁ is the half-span diameter, Step A2. Calculate the coordinates of any point on the arch rib (10) section when pre-arching is not considered in the inclined plane of the arch axis, then: In the formula, (x ₁ , y ₁ , z ₁ ) is the coordinate of any point on the cross-section of the arch rib (10) in the reference coordinate system when pre-arching is not considered, and h is the distance from the point on the cross-section of the arch rib (10) to the arch rib (10) The distance of the section center point, a is the horizontal distance from the center line of the arch rib (10) section to the point on the arch rib (10) section, and α is the horizontal angle of the point on the arch rib (10) section, θ is the inclination angle of arch rib (10); Step A3. Calculate the coordinates of any point on the arch rib (10) in the positive plane of the arch axis after considering the pre-camber, i.e. the coordinates of the anchor point. In the span direction, the z direction is along the sagittal height direction, and the y direction is determined according to the right-hand spiral rule, then: In the formula, (x, y, z) are the coordinates of the positioning point of the arch rib (10), Δz _y is the pre-camber in the direction of the oblique plane of the arch axis, b is the distance between the center line of the bridge deck and the arch foot of the arch rib (10) Offset; Step A4. Determine the location of the anchor point according to the coordinates of the anchor point calculated in step A3. 10. The inclined arch rib positioning method according to claim 8, characterized in that, when the inclined arch rib (10) is an inwardly inclined arch rib, further comprising the step D. using the second brace (12) to support the arch rib On the rib (10) top, the material strength of the second diagonal brace (12) is determined by the formula σ _c =M/HA _x , wherein, σ _c is the axial stress of the second diagonal brace (12), and M is the arch rib (10 ) is the roll bending moment produced under its own weight, H is the center distance between the top plate of the arch rib (10) and the bottom plate of the arch rib (10), and A _x is the cross-sectional area of the second diagonal brace (12).