CN116561864A - BIM technology-based steel pipe arch rib manufacturing construction method - Google Patents

Abstract

The invention relates to a construction method for manufacturing a steel pipe arch rib based on BIM technology, which relates to the technical field of arch rib manufacturing construction.

Description

BIM technology-based steel pipe arch rib manufacturing construction method

Technical Field

The invention relates to the technical field of arch rib manufacturing construction, in particular to a steel pipe arch rib manufacturing construction method based on BIM technology.

Background

Due to the characteristics of light weight, high assembly and construction speed and the like of the steel structure, more and more bridge projects adopt the steel structure. In recent years, large-span bridges crossing rivers and river are taken up, and a combined structure of a steel pipe arch and a steel box girder is adopted in many cases. The manufacturing of the steel pipe arch firstly carries out pipe rolling, namely, the steel plate is rolled into a circular pipe, and the process method has great influence on the efficiency, quality and material damage rate of the steel pipe arch.

In the conventional rolling process, the rolling pipes are all flat-mouth pipe rolling methods, namely the rolling pipe sections are in straight butt joint, the rolling pipe is not suitable for being manufactured by straight bending instead of bending, and the conventional rolling pipes are usually rolled first and then are cut into intersecting lines, so that after the rolling pipe is completed, the arch rib construction is completed by cutting the intersecting lines empirically during arch rib construction, repeated teaching is needed, and the arch rib forming quality is low.

Disclosure of Invention

The technical problems solved by the invention are as follows: the steel pipe arch rib manufacturing construction method based on the BIM technology solves the problem that an existing arch rib is low in forming quality.

The invention solves the technical problems by adopting the technical scheme that: the construction method for manufacturing the steel pipe arch rib based on the BIM technology comprises the following steps:

s01, segmenting an arch rib design line according to the arch rib radian, the transportation scheme, the hoisting scheme and the welding staggered joint requirement to obtain a pipe section design line;

s02, designing a branch pipe for supporting according to the position of a pipe section supporting node, and sectioning a pipe section design line according to the position of the branch pipe to obtain a pipe section design line;

s03, performing BIM modeling of the pipe section according to the pipe section design line;

s04, marking intersecting line welding seams between a pipe joint and a branch pipe on a pipe section BIM model, cutting longitudinal welding seams of the same pipe joint, and cutting circumferential welding seams of adjacent pipe joints;

s05, expanding each pipe joint from the longitudinal weld joint of the pipe joint to obtain all expansion surfaces of the pipe joint;

s06, automatically sleeving the expansion surface of the pipe joint, cutting and blanking, finishing groove cutting according to the groove angle, and marking the outer side surface of the pipe joint to obtain a pipe joint plate;

s07, rolling the pipe joint by using a four-roll shaft plate rolling machine, and welding the pipe joint into a pipe section;

and S08, adopting flange connection between pipe sections to obtain the steel pipe arch rib.

Further, the branch pipes for supporting are offset from the supporting nodes to two sides of a perpendicular bisector of the pipe section design line, two branch pipes are formed, and the minimum distance between the two branch pipes is not less than 50mm.

Further, in S03, the position reference attribute of all the pipe joints is kept consistent during modeling, and the rotation angle of the pipe joints is set according to the joint staggering requirement, wherein the position reference attribute includes the position and the depth on the plane.

Further, the gap of the longitudinal weld is 2mm, the blunt edge is 2mm, and the double-side groove is 25 degrees.

Further, in S08, a butt joint pipe is further included between each pipe section, and the butt joint pipe is used for welding adjacent pipe sections.

Further, in S07, the rolling of the pipe joint by using the four-axis plate rolling machine includes the following steps:

s701, adjusting the four-roll shaft plate bending machine to a pressure head state, and firstly performing arc pressing on two ends of a plate;

s702, sequentially setting the roller distances according to 230mm, 160mm, 120mm, 90mm and 75mm, gradually lifting the lower side roller shaft to roll, and finishing the pipe rolling when the longitudinal weld gap reaches 2 mm;

s703, after the coiled pipe is completed, finishing longitudinal welding seam welding on a submerged arc welding semi-automatic welding platform, wherein the height of the welding seam is 2-3 mm higher than the surface of the coiled pipe;

and S704, performing nondestructive detection on the welding seam after the welding seam is cooled, detecting the welding seam to be qualified, and performing rounding on the welding seam by using a four-roll shaft veneer reeling machine to finish reeling the pipe joint.

The invention has the beneficial effects that: according to the construction method for manufacturing the steel pipe arch rib based on the BIM technology, the steel pipe arch rib is segmented and then segmented, the BIM model is built, each segment of pipe joint is unfolded to obtain the accurate profile of the pipe joint with the intersecting line, the pipe joint is rolled by using the four-roll shaft plate rolling machine, the quality of the obtained pipe joint connected into the arch rib is higher, the problem that the existing steel pipe arch rib construction arch rib is low in forming quality is solved, and compared with the prior art, the material loss rate can be reduced by firstly rolling the pipe joint and then cutting the girth weld.

Drawings

FIG. 1 is a schematic flow chart of a construction method for manufacturing a steel pipe arch rib based on BIM technology.

Fig. 2 is a schematic arch rib diagram of the construction method for manufacturing the steel pipe arch rib based on the BIM technology, wherein 1 represents a first section of arch rib, 2 represents a second section of arch rib, 3 represents a third section of arch rib, and 4 represents a fourth section of arch rib.

FIG. 3 is a schematic diagram of adjacent pipe sections in the construction method for manufacturing the steel pipe arch rib based on the BIM technology.

FIG. 4 is a longitudinal weld of a pipe joint in the construction method for manufacturing the steel pipe arch rib based on the BIM technology.

FIG. 5 is a schematic diagram showing adjacent pipe sections in flange connection for a construction method for manufacturing steel pipe arch ribs based on BIM technology.

Detailed Description

The invention relates to a construction method for manufacturing a steel pipe arch rib based on BIM technology, which is shown in figure 1 and comprises the following steps:

s01, segmenting an arch rib design line according to the arch rib radian, the transportation scheme, the hoisting scheme and the welding staggered joint requirement to obtain a pipe section design line;

in particular, the ribs may be divided into segments as shown in fig. 1, i.e., into a first segment of rib 1, a second segment of rib 2, a third segment of rib 3, and a fourth segment of rib 4.

S02, designing a branch pipe for supporting according to the position of a pipe section supporting node, and sectioning a pipe section design line according to the position of the branch pipe to obtain a pipe section design line;

specifically, the pipe section design line is directly curved instead of curved to form a pipe section design line, for each pipe section, a branch pipe for supporting is needed, and because the branch pipe needs to bear load, the branch pipe for supporting is offset from a supporting node to two sides of a perpendicular bisector of the pipe section design line to form two branch pipes, and for the staggered joint requirement of a welding seam on the pipe section, as shown in fig. 3, the following is required: the minimum distance between two branch pipes is not less than 50mm, the position of the branch pipe from the circumferential weld is not less than 80mm, the annular distance between the longitudinal welds of adjacent pipe sections is not less than 200mm, the distance between the intersecting line weld of the main pipe and the branch pipe and the longitudinal seam of the main pipe is not less than 80mm, and in particular, a certain degree of folding is arranged between the adjacent pipe sections in fig. 3, and the degree of folding is very small, so that the method is not shown in fig. 3.

Therefore, the connection position of the branch pipe and the main pipe cannot be the connection position of the main pipe and the main pipe, so that the pipe section needs to be segmented according to the position of the branch pipe, and after the pipe section is connected into the pipe section, the connection position of the branch pipe and the main pipe cannot be positioned at the connection position of the pipe section and the pipe section when the branch pipe is assembled.

S03, performing BIM modeling of the pipe section according to the pipe section design line;

specifically, the position reference attribute of each pipe joint is kept consistent during modeling, and the rotation angle of the pipe joint is set according to the staggered joint requirement, wherein the position reference attribute comprises the position and the depth on a plane.

S04, marking intersecting line welding seams between a pipe joint and a branch pipe on a pipe section BIM model, cutting longitudinal welding seams of the same pipe joint, and cutting circumferential welding seams of adjacent pipe joints;

specifically, for the intersecting line weld between the pipe joint and the branch pipe, a contact surface matched with the pipe joint needs to be cut on the branch pipe, and a contact area is provided; the gap of the longitudinal weld joint is 2mm, the blunt edge is 2mm, and the double-side grooves are 25 degrees, as shown in figure 4; because the arch rib is designed by adopting a straight curved way, a part of adjacent pipe sections are overlapped, and therefore, the overlapped part needs to be cut at the girth joint of the adjacent pipe sections.

S05, expanding each pipe joint from the longitudinal weld joint of the pipe joint to obtain all expansion surfaces of the pipe joint;

s06, automatically sleeving the pipe joint pipe surface, cutting and blanking, finishing groove cutting according to the groove angle, and marking the outer side surface of the pipe joint to obtain a pipe joint plate;

s07, rolling the pipe joint by using a four-roll shaft plate rolling machine, and welding the pipe joint into a pipe section;

specifically, the rolling of the pipe joint by using the four-axis plate rolling machine comprises the following steps:

s701, adjusting the four-roll shaft plate bending machine to a pressure head state, and firstly performing arc pressing on two ends of a plate;

s702, sequentially setting the roller distances according to 230mm, 160mm, 120mm, 90mm and 75mm, gradually lifting the lower side roller shaft to roll, and finishing the pipe rolling when the longitudinal weld gap reaches 2 mm;

s703, after the coiled pipe is completed, finishing longitudinal welding seam welding on a submerged arc welding semi-automatic welding platform, wherein the height of the welding seam is 2-3 mm higher than the surface of the coiled pipe;

and S704, performing nondestructive detection on the welding seam after the welding seam is cooled, detecting the welding seam to be qualified, and performing rounding on the welding seam by using a four-roll shaft veneer reeling machine to finish reeling the pipe joint.

And S08, adopting flange connection between pipe sections to obtain the steel pipe arch rib.

Specifically, still include the butt joint pipe between each pipeline section, the butt joint pipe is used for welding adjacent pipeline section, specifically: after the adjacent pipe sections are connected by adopting flanges, 3 cambered surfaces are used for forming a butt joint pipe which is welded between the adjacent pipe sections, the diameter of the butt joint pipe is consistent with that of the pipe sections, and the butt joint pipe can be used for protecting the flange structure and reinforcing the connection of the adjacent pipe sections.

Claims (6)

1. The construction method for manufacturing the steel pipe arch rib based on the BIM technology is characterized by comprising the following steps of:

s01, segmenting an arch rib design line according to the arch rib radian, the transportation scheme, the hoisting scheme and the welding staggered joint requirement to obtain a pipe section design line;

s02, designing a branch pipe for supporting according to the position of a pipe section supporting node, and sectioning a pipe section design line according to the position of the branch pipe to obtain a pipe section design line;

s03, performing BIM modeling of the pipe section according to the pipe section design line;

s04, marking intersecting line welding seams between a pipe joint and a branch pipe on a pipe section BIM model, cutting longitudinal welding seams of the same pipe joint, and cutting circumferential welding seams of adjacent pipe joints;

s05, expanding each pipe joint from the longitudinal weld joint of the pipe joint to obtain all expansion surfaces of the pipe joint;

s06, automatically sleeving the expansion surface of the pipe joint, cutting and blanking, finishing groove cutting according to the groove angle, and marking the outer side surface of the pipe joint to obtain a pipe joint plate;

s07, rolling the pipe joint by using a four-roll shaft plate rolling machine, and welding the pipe joint into a pipe section;

and S08, adopting flange connection between pipe sections to obtain the steel pipe arch rib.

2. The construction method for manufacturing the steel pipe arch rib based on the BIM technology according to claim 1, wherein the branch pipes used for supporting are offset from the supporting nodes to two sides of a perpendicular bisector of a pipe section design line, two branch pipes are formed, and the minimum distance between the two branch pipes is not less than 50mm.

3. The construction method for manufacturing the steel pipe arch rib based on the BIM technology according to claim 1, wherein in S03, the position reference attribute of all pipe joints is kept consistent during modeling, and the rotation angle of the pipe joints is set according to the staggered joint requirement, wherein the position reference attribute comprises the position and the depth on a plane.

4. The construction method for manufacturing the steel pipe arch rib based on the BIM technology according to claim 1, wherein the gap of the longitudinal welding seam is 2mm, the blunt edge is 2mm, and the double-sided groove is 25 degrees.

5. The construction method for manufacturing steel pipe arch ribs based on BIM technology as recited in claim 1, wherein in S08, butt joint pipes are further included between each pipe section, and the butt joint pipes are used for welding adjacent pipe sections.

6. The construction method for manufacturing the steel pipe arch rib based on the BIM technology according to claim 1, wherein in S07, the rolling of the pipe joint by using the four-axis plate rolling machine comprises the following steps:

s701, adjusting the four-roll shaft plate bending machine to a pressure head state, and firstly performing arc pressing on two ends of a plate;

s702, sequentially setting the roller distances according to 230mm, 160mm, 120mm, 90mm and 75mm, gradually lifting the lower side roller shaft to roll, and finishing the pipe rolling when the longitudinal weld gap reaches 2 mm;

s703, after the coiled pipe is completed, finishing longitudinal welding seam welding on a submerged arc welding semi-automatic welding platform, wherein the height of the welding seam is 2-3 mm higher than the surface of the coiled pipe;

and S704, performing nondestructive detection on the welding seam after the welding seam is cooled, detecting the welding seam to be qualified, and performing rounding on the welding seam by using a four-roll shaft veneer reeling machine to finish reeling the pipe joint.