CN116180595A - Accurate positioning and assembling method for beveled anchor pipes of anchor boxes - Google Patents

Abstract

The invention relates to a method for accurately positioning and assembling an anchor box beveling anchor pipe, which can effectively ensure the position and dimension relation of the beveling end of the anchor pipe relative to a structural member of the anchor box, realize the matching installation of the anchor pipe and a tower wall under the condition that the anchor pipe cannot be assembled later and can realize the pre-control and guarantee, and the method provides a positioning basis for the anchor pipe assembly by finding a longitudinal and transverse base line of a bearing plate; secondly, controlling the position relation between the center of the anchor pipe and the center of the anchor hole of the bearing plate through the predicted value A, B, C, D and the assembled value of the anchor pipe; thirdly, through the operation process of the plumb bob, the projection of the long short axis of the anchor pipe to the surface of the bearing plate is realized, so that the angle relation between the longitudinal base line of the bearing plate and the long axis of the anchor pipe can be adjusted to realize the positioning of the anchor pipe.

Description

Accurate positioning and assembling method for beveled anchor pipes of anchor boxes

Technical Field

The invention relates to a method for accurately positioning and assembling an anchor box beveling anchor pipe, which can effectively ensure the relation of the bit dimension of the beveling end of the anchor pipe relative to a structural member of the anchor box, realizes the matching installation of the anchor pipe and a tower wall under the condition that the anchor pipe cannot be assembled later and can realize the pre-control and guarantee, and belongs to the field of manufacturing of cable-stayed bridge tower columns or steel beams.

Background

The anchor box is assembled inside a cable-stayed bridge tower column or a steel beam and is a main stress member, and the anchor pipe is stressed and plays a guiding role for the inhaul cable. In the prior art, the anchor pipes are designed with two ends cut in an aligned manner, wherein one end is welded with the bearing plate and stressed together, the other end is contracted into the tower wall or extends out of the tower wall, and the ports are free ends. In the process of assembling the sections, only the positions of the anchor boxes need to be considered, and the anchor pipes can be ensured to smoothly penetrate out of the tower wall. The problems that exist are: the installation that the elliptical mouth of chamfer and tower wall anchor eye of chamfer is exactly matchd to anchor pipe one side is for the first time applied, and anchor pipe assembly deviation will lead to the unable normal tower wall anchor pipe of stretching into of anchor pipe elliptical mouth, influences the installation.

Disclosure of Invention

The design purpose is as follows: the defects in the background art are avoided, and the method for accurately positioning and assembling the beveled anchor pipe of the anchor box is designed, so that the bit dimension relation of the beveled end of the anchor pipe relative to the structural member of the anchor box can be effectively ensured, and the anchor pipe and the tower wall can be installed in a matched manner under the condition that the anchor pipe cannot be installed later, and the control and the guarantee in advance can be realized.

The design scheme is as follows: in order to achieve the above design objective. One end of the anchor pipe of the anchor box of the steel tower designed by the invention is designed to be a neat port and is welded with the bearing plate, the other end extends into the wall plate of the tower wall, and the outer edge of the anchor pipe is 20mm away from the outer skin of the tower wall (the wall thickness of the tower is 56-78 mm). Therefore, the welding ends of the anchor pipes of the anchor box and the tower wall are required to be beveled and matched with the tower wall, and the matching degree of the beveled ends of the anchor pipes and the anchor holes of the tower wall is directly influenced because of the position relation of the beveled ends of the anchor pipes in the self structure of the anchor box (the position relation of beveled elliptical mouths of the anchor pipes relative to the anchor box).

In the anchor box structure of fig. 1, after the anchor box itself forms a whole, the anchor pipe is changed along with the change of the installation position of the anchor web only through the welded connection of the anchor web and the tower column web. Therefore, when the anchor box participates in the assembly of the tower column, the anchor pipes are relatively fixed and cannot be independently matched and adjusted.

How to ensure that the center of the anchor hole of the wall plate is aligned with the center of the anchor pipe under the condition of only welding the anchor web plate, and the height matching of the beveled end of the anchor pipe and the anchor hole of the tower wall is the main problem solved by the invention. The assembly precision of the inclined cutting anchor pipe and the bearing plate can be judged and strictly controlled through the assembly relation of the structural members of each part, and the matching precision of the elliptical mouth of the anchor pipe and the anchor hole of the wall plate can be effectively ensured.

According to the invention, the problem of anchor tube positioning is solved and the precision of anchor tube assembly is improved by accurately positioning and assembling the anchor tubes according to the position state relation of the anchor tubes in the anchor box.

Compared with the background technology, the method has the advantages that key points affecting the assembly matching degree of the anchor box anchor pipe and the wallboard are grasped, and the assembly precision problem is solved, so that the matching degree of the anchor box anchor pipe and the wallboard meets the design requirement; secondly, when one end of the anchor pipe is a bevel end, the method for scribing the anchor pipe is mainly introduced, and is completed in the synchronous and same state through sawing operation and scribing operation, so that the position line of the long and short axes of the bevel end is effectively and accurately found, and scribing extension operation towards the straight cutting end is completed; thirdly, the method respectively carries out step-by-step control from the bearing plate and the anchor pipe. Firstly, the method provides positioning basis for the anchor pipe assembly by finding the longitudinal and transverse baselines of the bearing plates; secondly, controlling the position relation between the center of the anchor pipe and the center of the anchor hole of the bearing plate through the predicted value A, B, C, D and the assembled value of the anchor pipe (the allowable deviation of the position relation between the center of the anchor pipe and the center of the anchor hole of the bearing plate is less than or equal to 2 mm); thirdly, through the operation process of the plumb bob, the projection of the long and short axes of the anchor pipe to the surface of the bearing plate is realized, so that the angle relation between the longitudinal base line of the bearing plate and the long axis of the anchor pipe can be adjusted to realize the positioning of the anchor pipe; the anchor pipe accurate positioning and assembling method has been successfully applied to the items of forward steel towers (the section size of the steel tower is 6 multiplied by 7m, the weight of the tower Duan Gaodu is 190 tons and is unequal between 3m and 7.8 m), and the method has good effect, effectively ensures the assembling precision of an anchor box, improves the matching degree of the anchor pipe and an anchor hole of a tower wall, and achieves 100 percent.

Drawings

Fig. 1 is a schematic front view of an anchor box structure.

Fig. 2 is a schematic side view of fig. 1.

Fig. 3 is a schematic perspective view of fig. 1.

FIG. 4 is a schematic view of the relationship between bearing plate and anchor tube.

FIG. 5 is a schematic view of the base line and dimensions of the bearing plate.

Fig. 6 is a schematic illustration of anchor tube clamping and cutting.

FIG. 7 is a schematic cross-sectional view of section A-A of FIG. 6.

FIG. 8 is a schematic view of section B-B of FIG. 6.

Fig. 9 is a schematic drawing of an anchor line.

FIG. 10 is a schematic view of the base line and dimensions of the bearing plate.

Fig. 11 is a schematic view of anchor line sling positioning.

Fig. 12 is a schematic top view of fig. 11.

Description of the embodiments

Example 1: reference is made to fig. 1-4. The anchor box structure is as shown in fig. 1-3: the anchor backing plate 1, the bearing plate 2, the anchor web plate 3, the anchor pipe 4 and the stiffening plate 5. The size of the anchor box structure is too small, partial penetration welding is adopted between the anchor pipe 4 and the bearing plate 2, four stiffening pipes are arranged on the periphery of the anchor pipe 4 and are in penetration welding with the anchor pipe 4, and therefore the anchor pipe 4 cannot be installed later.

The positional relationship between the bearing plate 2 and the anchor tube 4 is shown in fig. 4, and an angle a exists between a longitudinal base line of the bearing plate 2 and an elliptical long and short axis formed by a bevel port at the far end of the anchor tube 4, and the angle a is set between 0 and 90 degrees according to different installation positions of the anchor box.

Example 2: a precise positioning and assembling method for a beveled anchor pipe in an anchor box,

1) Manufacturing and scribing a bearing plate: reference is made to fig. 5. The bearing plate 2 adopts numerical control precision blanking, and the anchor holes are taken out together. And drawing a longitudinal and transverse base line of the bearing plate 2 by taking the center of the anchor hole as a reference.

2) The anchor pipe manufacturing and scribing method comprises the following steps: referring to fig. 6-8. The flush end and the bevel end of the anchor pipe 4 are cut into designed sizes by a sawing machine. Because the anchor tube-4 is of a circular tube structure, the method for determining the position of the elliptical opening long and short axes after the anchor tube 4 is beveled is as follows:

(1) cutting lines at two ends of the anchor tube 4 are marked according to the size of the anchor tube 4.

(2) The flatness of the top surface of the sawing machine bracket can be used only after the flatness is detected to be qualified, and the flatness is controlled to be 1mm/m.

(3) The anchor tube 4 is fixed on the sawing machine bracket and is fixed by a clamping device, so that the anchor tube 4 cannot move or rotate relatively during cutting.

(4) Under the fixed condition of the anchor pipe 4, the cutter head is moved to the flush end, one port of the anchor pipe 4 is cut vertically by the tangent cutting line, and when the anchor pipe is cut, the saw blade is vertical to the length of the pipe, so that the perpendicularity of the cutting end face is ensured.

(5) According to the position line of the beveled end and the beveled angle of the anchor pipe 4 in the figure, the angle of the cutter head of the sawing machine is adjusted, the angle of the cutter head is ensured to be consistent with the requirements in the figure, and the beveled end of the anchor pipe 4 is cut.

(6) When the sawing machine tool bit cuts the anchor pipe 4, the blade must be ensured to fall perpendicular to the ground, so that the cut of the anchor pipe 4 is ensured to be perpendicular to the ground when the anchor pipe 4 is fixed on the sawing machine bracket.

(7) After sawing of the two ends of the anchor tube 4 is finished, the anchor tube 4 is still fixed and cannot rotate relatively.

(8) One side of the guiding rule is tightly abutted to the bracket platform, the other end is tightly attached to the pipe wall of the anchor pipe 4, the diameter position of the anchor pipe 4 which is 1/2 of that of the guiding rule is found out, and a point is marked on the anchor pipe 4. Four points are selected out from the two ends of the anchor tube 4 in the same operation, and the two points are connected to form a horizontal line to form the long axis of the bevel-cut end ellipse of the anchor tube 4.

3) The anchor pipe positioning and assembling method comprises the following steps:

(1) and (5) flatly laying the bearing plate-2 on an assembly platform, and rechecking whether the longitudinal and transverse datum lines of the bearing plate-2 are accurate. The values of the position dimensions A, B, C, D of the anchor holes in the bearing plate-2 are recorded as shown in fig. 5.

(2) And aligning the anchor pipe 4 Ji Qieduan with the anchor hole of the bearing plate-2, and positioning the anchor pipe 4 according to the angle relation between the long axis line of the anchor pipe 4 and the longitudinal base line of the bearing plate. The long axis of the anchor pipe 4 is projected on the bearing plate 2 in a line hanging hammer way, and the angle relation between the projection line of the long axis and the longitudinal base line of the bearing plate-2 is measured to be consistent with the theoretical angle, namely, the adjustment is in place. And the pipe wall is controlled to be vertical to the bearing plate.

(3) And (3) measuring whether the distance from the edge of the bearing plate 2 to the wall skin of the anchor pipe 4 is equal to the wall thickness of the wall A, the wall thickness of the wall B, the wall thickness of the wall C and the wall thickness of the wall D along the longitudinal and transverse baselines of the bearing plate 2, and finely adjusting the anchor pipe 4 when deviation exists, wherein the longitudinal baselines of the bearing plate 2 and the long axis angles of the anchor pipe 4 and the verticality of the anchor pipe 4 and the bearing plate 2 are ensured. After the position relation between the bearing plate 2 and the anchor pipe 4 is fixed, the welding operation of the bearing plate 2 and the anchor pipe 4 is completed through spot welding fixation.

It should be understood that: although the above embodiments describe the design concept of the present invention in more detail, these descriptions are merely descriptions of the design concept of the present invention, and not limitations on the design concept of the present invention, and any combination, addition or modification not exceeding the design concept of the present invention falls within the scope of the present invention.

Claims (1)

1. A precise positioning and assembling method for a beveling anchor pipe in an anchor box is characterized by comprising the following steps:

1) The bearing plate is subjected to numerical control precision blanking, the anchor holes are taken out together, and longitudinal and transverse baselines of the bearing plate are drawn by taking the center of each anchor hole as a reference;

2) The anchor pipe Ji Pingduan and the beveling end are cut into designed sizes by a sawing machine, and because the anchor pipe is of a circular pipe structure, the position determining method of the elliptical mouth long and short axes after beveling the anchor pipe is as follows:

(1) cutting lines at two ends of the anchor pipe according to the size of the anchor pipe;

(2) the flatness of the top surface of the sawing machine bracket can be used only after the flatness is detected to be qualified, and the flatness is controlled to be 1mm/m;

(3) the anchor pipe is fixed on the sawing machine bracket and is fixed by the clamping device, so that the anchor pipe can not move or rotate relatively during cutting;

(4) under the anchor pipe fixing condition, moving the cutter head to the flush end, and vertically cutting a port of the anchor pipe by using a tangent cutting line, wherein the saw blade is vertical to the length of the pipe during cutting, so that the perpendicularity of a cutting end face is ensured;

(5) according to the position line of the beveled end and the beveled angle of the anchor pipe in the drawing, the angle of the cutter head of the sawing machine is adjusted, the angle of the cutter head is ensured to be consistent with the requirements in the drawing, and the beveled end of the anchor pipe is cut;

(6) when the sawing machine tool bit cuts the anchor pipe, the blade must be ensured to fall perpendicular to the ground, so that the anchor pipe incision is ensured to be perpendicular to the ground when the anchor pipe is fixed on the sawing machine bracket;

(7) after sawing of the two ends of the anchor pipe is finished, the anchor pipe is ensured to be still fixed and can not rotate relatively;

(8) one side of the right-angle guiding rule is abutted against the bracket platform, the other end of the right-angle guiding rule is abutted against the pipe wall of the anchor pipe, the diameter position of the anchor pipe is found out on the guiding rule, a point is drawn on the anchor pipe, four points are selected out at two ends of the anchor pipe in total in the same operation, and the two points are connected to form a horizontal line to form the oval port long axis of the beveled end of the anchor pipe;

3) The anchor pipe positioning and assembling method comprises the following steps:

(1) the bearing plate is tiled on an assembly platform, whether the longitudinal and transverse datum lines of the bearing plate 2 are accurate or not is rechecked, and the position size A, B, C, D of the anchor holes in the bearing plate is recorded as shown in the figure;

(2) aligning the anchor pipe Ji Qieduan with the anchor hole of the bearing plate, positioning the anchor pipe according to the angle relation between the long axis of the anchor pipe and the longitudinal base line of the bearing plate, projecting the long axis of the anchor pipe onto the bearing plate in an aligned manner by a plumb bob method, and adjusting in place when the angle relation between the projection line of the long axis and the longitudinal base line of the bearing plate is consistent with the theoretical angle, wherein the pipe wall is controlled to be vertical to the bearing plate;

(3) measuring whether the distance from the edge of the bearing plate to the outer wall of the anchor pipe wall is equal to the wall thickness of the A pipe wall, the wall thickness of the B pipe wall, the wall thickness of the C pipe wall and the wall thickness of the D pipe wall along the longitudinal and transverse base lines of the bearing plate, fine adjusting the anchor pipe when deviation exists, however, the welding operation of the bearing plate and the anchor pipe is completed after the position relation between the bearing plate and the anchor pipe is fixed and the spot welding is fixed.

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