CN116275660A - Splicing and assembling method for large-size asymmetric special-shaped steel arch base - Google Patents
Splicing and assembling method for large-size asymmetric special-shaped steel arch base Download PDFInfo
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- CN116275660A CN116275660A CN202310422004.8A CN202310422004A CN116275660A CN 116275660 A CN116275660 A CN 116275660A CN 202310422004 A CN202310422004 A CN 202310422004A CN 116275660 A CN116275660 A CN 116275660A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
Abstract
The method is characterized in that the large-size asymmetric special-shaped steel arch seat is split into a plurality of parts, namely an inner web plate unit, an outer web plate unit, a bottom plate unit, a top plate unit, a T-shaped cross beam, an arch rib connecting section and a supporting section of the supporting body; and after the inner web plate unit, the outer web plate unit, the support bearing plate unit, the support bottom plate unit, the support top plate unit, the T-shaped cross beam, the arch rib connecting section and the support section are respectively prepared, the welding sequence is optimized through three-dimensional evolution, the welding difficulty and the total splicing difficulty of the large-size steel arch base are reduced, and the precision of each link is ensured. The method has clear thought, definite target and simple and convenient operation, and effectively improves the manufacturing precision of the steel arch abutment.
Description
Technical Field
The invention relates to a splicing and assembling method for a large-size asymmetric special-shaped steel arch seat, and belongs to the technical field of bridge engineering.
Background
In bridge engineering, steel arch seats used for arch bridges need to be assembled and spliced.
The common splicing methods are arc welding and bolting. Arc welding is performed by manually operated welding rods, and bolting is performed by reserving holes and bolting the steel members together. For large-size asymmetric steel arch seats, the internal structure is complex, the precision requirement is high, the operation space is not enough when arc welding is used, and the precision cannot be ensured. The use of bolted connections can make the asymmetric special-shaped steel arch seat component of jumbo size become more complicated, and the operation is inconvenient, increases work load.
Therefore, the two splicing methods are difficult to be adopted for the large-size asymmetric special-shaped steel arch base.
Disclosure of Invention
The invention aims to solve the problem of splicing large-size asymmetric special-shaped steel arch seats, and provides a splicing and assembling method for the large-size asymmetric special-shaped steel arch seats.
The technical scheme of the invention is that the large-size asymmetric special-shaped steel arch abutment splicing and assembling method comprises the steps of dividing the large-size asymmetric special-shaped steel arch abutment into a plurality of small parts for welding, and finally splicing in a whole way; the small parts comprise a support body inner and outer web plate unit, a support body bearing plate unit, a support body bottom plate unit, a support body top plate unit, a T-shaped cross beam, an arch rib connecting section and a support section; and after the inner web plate unit, the outer web plate unit, the support bearing plate unit, the support bottom plate unit, the support top plate unit, the T-shaped cross beam, the arch rib connecting section and the support section are respectively prepared, the three-dimensional modeling is adopted to optimize the welding sequence for overall splicing, the symmetrical welding is adopted for the penetration welding seam, and the coordinates of each corner point of the steel arch base are accurately positioned by using a total station in the whole process.
The inner and outer web plate units of the support body comprise inner and outer web plates of the support body and first stiffening ribs; the inner web plate and the outer web plate of the support body are long trapezoid steel plate structures, the height of the trapezoid is in the length direction, and the two bottoms of the trapezoid are in the width direction; the first stiffening ribs comprise long stiffening ribs and short stiffening ribs, 6 long stiffening ribs are uniformly distributed in the length direction of the inner and outer webs of the support body, 8 short stiffening ribs with different lengths are distributed in the width direction of the inner and outer webs of the support body, and the joint of the short stiffening ribs and the long stiffening ribs is crisscross; the longitudinal baselines of the inner web plate and the outer web plate of the support body are symmetrical lines of the units of the inner web plate and the outer web plate of the support body.
The support body bearing plate unit comprises a support body bearing plate and stiffening ribs; the support body bearing plate is of a rectangular steel plate structure, 5 long stiffening ribs are uniformly arranged in the length direction of the support body bearing plate, short stiffening ribs are uniformly arranged in the width direction of the support body bearing plate, and the joint of the short stiffening ribs and the long first stiffening ribs is vertically crossed; the middle long stiffening rib is taken as a longitudinal base line of the support body bearing plate, and the middle long stiffening rib is taken as a symmetrical line of the support body bearing plate.
The support body bottom plate unit comprises a support body bottom plate and stiffening ribs; the support body bottom plate is of a rectangular steel plate structure, long stiffening ribs perpendicular to the length of the bottom plate are arranged in the middle of the length direction of the support body bottom plate, and short stiffening ribs perpendicular to the length of the bottom plate are arranged at two ends of the length direction of the support body bottom plate; rectangular and strip-shaped openings are formed in the support body bottom plate, and the two sides of the width direction of the support body bottom plate are symmetrical based on the longitudinal base line of the support body bottom plate.
The support body top plate unit comprises a support body top plate and first stiffening ribs; the top plate of the support body is of a rectangular steel plate structure, 5 stiffening ribs perpendicular to the length direction of the top plate of the support body are arranged in the length direction of the top plate of the support body, each stiffening rib is 10cm away from the two end parts, and 3 stiffening ribs are uniformly distributed in the middle; longitudinal stiffening ribs are arranged among the 5 stiffening ribs on one side of the width direction of the top plate of the support body.
The T-shaped cross beam comprises a rectangular cross beam web, T-shaped cross beam stiffening ribs and T-shaped cross beam flange plates; the T-shaped beam web plate is of a rectangular steel plate structure, 9T-shaped beam stiffening ribs are uniformly arranged in the length direction of the T-shaped beam web plate, and the T-shaped beam stiffening ribs are vertically connected with the T-shaped beam web plate in the length direction; one side of the web plate of the T-shaped beam in the width direction is vertically provided with a T-shaped beam flange plate; two rows of round holes are distributed on the T-shaped beam web plate between two adjacent T-shaped beam stiffening ribs, and the number of the round holes in each row is 7 and the round holes are uniformly distributed.
The arch rib connecting section comprises an arch rib connecting section top plate, an arch rib connecting section bin partition plate, an arch rib connecting section bottom plate, an arch rib connecting section partition plate, an arch rib connecting section inner web plate, an arch rib connecting section outer web plate and a second stiffening rib; the top plate of the arch rib connecting section and the bottom plate of the arch rib connecting section are respectively and vertically connected to two ends of the outer web plate of the arch rib connecting section in the length direction to form three faces of a cuboid; the length and width of the top plate of the arch rib connecting section are equal to those of the bottom plate of the arch rib connecting section, and the length of the top plate of the arch rib connecting section is equal to that of the outer web plate of the arch rib connecting section; two arch rib connecting section partition boards which are parallel to each other are arranged between the arch rib connecting section top plate and the arch rib connecting section bottom plate, the length of each arch rib connecting section partition board is the distance between the arch rib connecting section top plate and the arch rib connecting section bottom plate, and the width of each arch rib connecting section partition board is the same as the width of the arch rib connecting section top plate; two arch rib connecting section inner webs which are parallel to each other and two arch rib connecting section warehouse partitions which are parallel to each other are arranged in the space between the arch rib connecting section top plate, the arch rib connecting section bottom plate, the arch rib connecting section outer webs and the arch rib connecting section warehouse partitions; the inner web of the arch rib connecting section is parallel to the outer web of the arch rib connecting section and is respectively and vertically connected with the top plate of the arch rib connecting section, the bottom plate of the arch rib connecting section and the partition plate of the arch rib connecting section; the arch rib connecting section bin partition plate is parallel to the arch rib connecting section top plate or the arch rib connecting section bottom plate, is vertical to the arch rib connecting section bin partition plate and is vertically intersected with the arch rib connecting section inner web plate; the arch rib connecting section bin partition plate divides the space between the inner web plate of the arch rib connecting section and the outer web plate of the arch rib connecting section into three spaces, and second stiffening ribs are respectively distributed on the outer web plates of the arch rib connecting section in the three spaces and are parallel to the top plate of the arch rib connecting section.
The support section comprises a support section top plate, a support section outer web plate, a support section inner web plate, a support section bottom plate, a support section partition plate, a support section diaphragm plate and a third stiffening rib.
The support section top plate is a support section top plate unit, the support section outer web plate and the support section inner web plate are support body inner and outer web plate units, the support section bottom plate is a support section bottom plate unit, and third stiffening ribs which are criss-cross are arranged on the support section diaphragm plate.
The length of the top plate of the supporting section is the same as the width of one side of the bottom plate of the supporting section; the upper bottom width of the outer web plate of the supporting section is the same as that of the top plate of the supporting section, and the lower bottom width is the same as that of the other side of the bottom plate of the supporting section; a trapezoid prism is formed by a supporting section top plate, a supporting section bottom plate and two supporting section outer webs; in the trapezoid prism table, two parallel inner webs of the support section are distributed between the outer webs of the two support sections, and the inner webs of the support section and the outer webs of the support section are identical in shape and size; a supporting section diaphragm plate is arranged in the horizontal direction between the inner webs of the two supporting sections, and is fixedly connected with the inner webs of the two supporting sections; and a supporting section diaphragm plate is further arranged in the vertical direction between the inner webs of the two supporting sections and is respectively connected and fixed with the supporting section top plate and the supporting section diaphragm plate.
The special-shaped steel arch abutment comprises an arch rib connecting section, a supporting section unit, a bearing plate unit and a lower cross beam. The supporting section unit is a trapezoid prismatic table, and the two arch rib connecting sections are respectively arranged on inclined planes at two sides of the supporting section unit through the bearing plate unit; the bottom of the supporting section unit is arranged on the lower cross beam; the support section unit comprises a support body inner and outer web plate unit, a support body bearing plate unit, a support body bottom plate unit and a support body top plate unit.
A splicing and assembling process method for a large-size asymmetric special-shaped steel arch base comprises the following steps:
(1) And preparing an inner web plate unit, an outer web plate unit, a support bearing plate unit, a support top plate unit and a support bottom plate unit of the support and preparing the inner web plate unit and the outer web plate unit of the support respectively.
After the steel plate is pretreated, blanking, and marking out transverse and longitudinal datum lines, and cutting a butt edge groove by flame; assembling the components according to the base lines, and scribing the position lines of the stiffening ribs according to the lines; welding stiffening ribs according to the line assembly, correcting deformation, and mainly controlling planeness and perpendicularity of the stiffening ribs; correcting the transverse baseline and the longitudinal baseline after correcting the deformation, and handing over and assembling after the deformation is qualified.
(2) Preparing a T-shaped cross beam; after the steel plate is pretreated, blanking, cutting the upper end slope of the web plate by taking the straight edge of the lower end of the web plate of the T-shaped cross beam as a reference flame, drawing a transverse reference line, and drawing a T-shaped cross beam stiffening rib assembly position line; tightly jacking and assembling a T-shaped structure formed by a T-shaped beam web plate and a T-shaped beam flange plate, performing submerged arc welding, and trimming deformation; and (3) welding the T-shaped beam stiffening ribs according to the line assembly, correcting deformation, and mainly controlling flatness and perpendicularity of the T-shaped beam stiffening ribs, and handing over and assembling after the flatness and perpendicularity are qualified.
(3) Preparing an arch rib connecting section; sequentially assembling and welding an arch rib connecting section partition board, an arch rib connecting section bin partition board, an arch rib connecting section top board, an arch rib connecting section bottom board and an arch rib connecting section inner web board by taking an arch rib connecting section outer web board as a reference surface; hanging an outer web plate unit of the arch rib connecting section into a tire type, leveling, measuring the elevation value of the web plate, and ensuring the level of the web plate; dividing a partition board assembly position line by taking a web vertical base line as a reference, and connecting arch ribs with a partition board assembly position line of a bin; respectively hanging a top plate of the arch rib connecting section and a bottom plate unit of the arch rib connecting section to specified positions by using a crane to align the top plate and the bottom plate unit with an outer web of the arch rib connecting section, firmly jacking the top plate by using a jacking tool, tightly closing the outer web of the arch rib connecting section and a partition plate of the arch rib connecting section, and welding; and (3) completing welding, sandblasting and coating, and participating in the total splicing of the sections.
(4) Preparing a supporting section: leveling the bottom plate of the supporting section, measuring the elevation value of the bottom plate of the supporting section, and ensuring the level of the bottom plate of the supporting section; dividing an assembly line of an inner web plate of the supporting section, an outer web plate of the supporting section, a diaphragm plate of the supporting section and a bearing plate of the supporting section by using longitudinal and transverse references on a bottom plate of the supporting section; assembling a supporting section bottom plate and a supporting section diaphragm plate unit to the wires; positioning the bottom plate unit of the supporting section, positioning the inner web plate and the outer web plate of the supporting section, positioning the bearing plate unit of the supporting section and positioning the top plate unit of the supporting section respectively; and (5) marking the arch rib connecting section by taking the longitudinal and transverse baselines on the supporting section bearing plate as the reference, and installing the matching parts.
(5) Splicing and assembling the asymmetric special-shaped steel arch base; positioning a lower cross beam on a special steel arch seat assembly jig frame for a wharf; hoisting the support body to the jig frame by using a floating crane, ensuring that the longitudinal and transverse baselines of the support body are aligned with the longitudinal and transverse baselines of the jig frame, and leveling the horizontal baselines of the support body units; hoisting the arch rib connecting section by using a floating crane, directly placing the lower part on a supporting matching part of a supporting body, and using a three-dimensional measuring instrument and a jack to coordinate with the fine adjustment connecting section to ensure that the deviation of the position line of a measuring point of an upper structure is not more than 2mm; and welding a welding line between the connecting body and the supporting body after the welding line is qualified, and after flaw detection, carrying out relief grinding to evenly follow the welding line and carrying out coating repair.
The invention has the advantages that the large-size asymmetric special-shaped steel arch seat stress steel plates are thick plates, the number of the component parts is large, the welding seams are dense, the welding seam requirement is high, but the welding space is narrow, and the operation difficulty is high. The steel arch seat member has large structural size, irregular shape, large overall weight and high manufacturing difficulty. The two sides of the steel arch base are provided with arch rib sections, the space angle control precision of the steel arch base directly influences the arch rib line shape, and the precision control difficulty is high. The invention can provide the steel arch splicing method with convenient operation, high quality and high precision.
Drawings
FIG. 1 is a flow chart of a process for manufacturing a large-size asymmetric profiled steel abutment;
FIG. 2 is a schematic view of a support body inner and outer web element;
FIG. 3 is a schematic view of a support body bearing plate unit;
FIG. 4 is a schematic diagram of a support floor unit;
FIG. 5 is a schematic view of a support roof unit;
FIG. 6 is a schematic view of a T-beam;
FIG. 7 is a schematic view of a rib connection segment;
FIG. 8 is a schematic view of a support section;
FIG. 9 is a simplified diagram of a steel abutment;
in the figure, 1 is a first stiffener; 2 is a transverse base line of the inner and outer webs of the support body; 3 is the inner and outer web main body of the supporting body; 4 is a longitudinal baseline of the inner web plate and the outer web plate of the support body; 5 is the transverse baseline; 6 is a T-beam web; 7 is a T-shaped beam stiffener; 8 is a T-shaped beam flange plate; 9 is a top plate of the arch rib connecting section; 10 is a bulkhead of the arch rib connecting section; 11 is a bottom plate of the arch rib connecting section; 12 is a rib connecting section separator; 13 is an inner web of the rib connecting section; 14 is a second stiffener; 15 is an outer web of the rib connecting section; 16 is a support section top plate; 17 is the outer web of the support section; 18 is a support section inner web; 19 is a support section floor; 20 is a support section baffle; 21 a third stiffener; 22 is a support section diaphragm; 23 is a toe link; 24 support body units; 25 is a pressure bearing plate; 26 is a lower cross member.
Description of the embodiments
As shown in fig. 1, the method for splicing and assembling the large-size asymmetric special-shaped steel arch base in the embodiment comprises the following construction steps:
and the first step is to prepare an inner web plate unit, an outer web plate unit, a support bearing plate unit, a support bottom plate unit and a support top plate unit of the support respectively.
The inner and outer web elements of the support body are shown in figure 2.
After the steel plate is pretreated, blanking is carried out, and a transverse base line 2 of the inner and outer webs of the support body and a longitudinal base line 4 of the inner and outer webs of the support body are drawn, and the butt joint edge groove is cut by flame. And assembling the components according to the base lines, and scribing the position lines of the stiffening ribs according to the lines. And welding the stiffening ribs 1 according to the line assembly, correcting deformation, and mainly controlling the planeness and the perpendicularity of the stiffening ribs. After correcting the deformation, correcting the transverse base lines 2 of the inner and outer webs of the support body and the longitudinal base lines 4 of the inner and outer webs of the support body, and transferring and assembling after the deformation is qualified.
The support bearing plate unit shown in fig. 3, the support bottom plate unit shown in fig. 4, and the support top plate unit shown in fig. 5 are identical to the inner and outer web units of the support body, and will not be described again.
In a second step, shown in fig. 6, a T-beam is prepared,
after the steel plate is pretreated, blanking, cutting the groove at the upper end of the T-shaped beam web 6 by taking the straight edge at the lower end of the T-shaped beam web 6 as a reference flame, marking a transverse base line 5, and marking an assembly position line of the T-shaped beam stiffening rib 7. And (3) tightly jacking and assembling a T-shaped structure formed by the T-shaped beam web 6 and the T-shaped beam flange plate 8, performing submerged arc welding, and trimming and deforming. And (3) welding the T-shaped beam stiffening ribs 7 according to the line assembly, correcting deformation, mainly controlling flatness and perpendicularity of the stiffening ribs, and handing over and assembling after the flatness and the perpendicularity of the stiffening ribs are qualified.
Third, as shown in fig. 7, arch rib connecting segments are prepared.
The outer web 15 of the arch rib connecting section is used as a reference surface to sequentially assemble and weld the arch rib connecting section partition plate 12, the arch rib connecting section warehouse partition plate 10, the arch rib connecting section top plate 9, the arch rib connecting section bottom plate 11 and the inner web 13 of the arch rib connecting section. And (3) hanging the outer web 15 units of the arch rib connecting section into the tire type, leveling, measuring the elevation value of the web, and ensuring the web level. Dividing the assembly position line of the partition plates and the assembly position line of the partition plates 10 of the arch rib connecting section by taking the vertical base line of the web plate as a reference. The arch rib connecting section top plate 9 and the arch rib connecting section bottom plate 11 are respectively hung to specified positions by a crane, aligned with the arch rib connecting section outer web 15, firmly jacked by a jacking tool, tightly abutted with the arch rib connecting section outer web 15 and the arch rib connecting section partition plate 12 and welded. And (3) completing welding, sandblasting and coating, and participating in the total splicing of the sections.
Fourth, as shown in fig. 8, a support section is prepared.
The supporting section bottom plate 19 is put flat, the bottom plate elevation value is measured, and the supporting section bottom plate is ensured to be horizontal. And (3) dividing an assembly line of the inner web 18 of the supporting section, the outer web 17 of the supporting section, the transverse partition 22 of the supporting section and the bearing plate 25 of the supporting section according to the longitudinal and transverse references on the bottom plate of the supporting section.
Assembling the support section bottom plate 19 and the support section diaphragm plate 22 to the wire: the transverse position and the inclination of the transverse partition plate 22 of the supporting section are controlled in an important mode, and the positioning welding is carried out after the transverse position and the inclination are qualified.
The support section inner web 18 and the support section outer web 17 are positioned: respectively hoisting the two web units to a designated position by using a crane, so that the transverse base lines of the web units are aligned with the transverse base lines on the bottom plate to finish longitudinal positioning; the web plate position line on the bottom plate is used as a reference for positioning transversely, and the jacking tool is used for jacking firmly and is tightly abutted against the bottom plate 19 of the supporting section and the diaphragm plate 22 of the supporting section; web positioning templates are arranged at two ends of the bottom plate so as to control the positioning accuracy of the webs at two sides.
Support section bearing plate 25 unit positioning: respectively hanging two support section bearing plates 25 into the tire type, so that the vertical base lines of the two support section bearing plates are aligned with the vertical base lines and the horizontal base lines on the support section bottom plate 19 to finish the vertical and horizontal positioning; and the supporting tool is firmly jacked, and is tightly abutted with the supporting section bottom plate 19 and the supporting section diaphragm plate 22. And (5) after welding, carrying out relief grinding to ensure that the welding seam is uniform.
Support section top plate 16 unit positioning: the supporting section hangs the top plate 16 unit on the supporting section partition plate 20, so that the base line of the supporting section partition plate is aligned with the vertical base line of the supporting section bearing plate 25 unit to finish longitudinal positioning; positioning transversely by taking a transverse base line as a reference according to a schematic diagram; and (5) adopting a total station measuring point top plate standard, and performing tack welding after the standard is passed. Care was taken to enhance safety protection. And (5) after welding, carrying out relief grinding to ensure that the welding seam is uniform.
Installing a matching piece: the rib connecting section 23 is marked with the longitudinal and transverse baselines on the supporting section bearing plate 25 as the reference for installing matching parts.
Fifth, as shown in fig. 9, the steel abutment is assembled.
And positioning the lower cross beam 26 on the special steel arch support assembly jig frame for the wharf, and ensuring that the transverse and longitudinal base lines of the lower cross beam 26 are aligned with the transverse and longitudinal base lines on the jig frame. And a safety protection support is added to ensure the stability of the cross beam.
Claims (7)
1. The splicing and assembling method for the large-size asymmetric special-shaped steel arch base is characterized in that the method divides the large-size asymmetric special-shaped steel arch base into a plurality of small parts for welding, and finally, the large-size asymmetric special-shaped steel arch base is spliced in a whole; the small parts comprise a support body inner and outer web plate unit, a support body bearing plate unit, a support body bottom plate unit, a support body top plate unit, a T-shaped cross beam, an arch rib connecting section and a support section; and after the inner web plate unit, the outer web plate unit, the support bearing plate unit, the support bottom plate unit, the support top plate unit, the T-shaped cross beam, the arch rib connecting section and the support section are respectively prepared, the three-dimensional modeling is adopted to optimize the welding sequence for overall splicing, the symmetrical welding is adopted for the penetration welding seam, and the coordinates of each corner point of the steel arch base are accurately positioned by using a total station in the whole process.
2. A method of assembling a large-scale asymmetric profiled steel abutment according to claim 1, wherein the support body inner and outer web elements comprise support body inner and outer webs and stiffening ribs; the inner web plate and the outer web plate of the support body are long trapezoid steel plate structures, the height of the trapezoid is in the length direction, and the two bottoms of the trapezoid are in the width direction; the stiffening ribs comprise long stiffening ribs and short stiffening ribs, 6 long stiffening ribs are uniformly distributed in the length direction of the inner and outer webs of the support body, 8 short stiffening ribs with different lengths are distributed in the width direction of the inner and outer webs of the support body, and the joint of the short stiffening ribs and the long stiffening ribs is crisscross; the longitudinal baselines of the inner web plate and the outer web plate of the support body are symmetrical lines of the units of the inner web plate and the outer web plate of the support body.
3. The method for splicing and assembling the large-size asymmetric special-shaped steel arch base according to claim 1, wherein the T-shaped cross beam comprises a rectangular cross beam comprising a T-shaped cross beam web, a T-shaped cross beam stiffening rib and a T-shaped cross beam flange plate; the T-shaped beam web plate is of a rectangular steel plate structure, 9T-shaped beam stiffening ribs are uniformly arranged in the length direction of the T-shaped beam web plate, and the T-shaped beam stiffening ribs are vertically connected with the T-shaped beam web plate in the length direction; one side of the web plate of the T-shaped beam in the width direction is vertically provided with a T-shaped beam flange plate; two rows of round holes are distributed on the T-shaped beam web plate between two adjacent T-shaped beam stiffening ribs, and the number of the round holes in each row is 7 and the round holes are uniformly distributed.
4. The method for splicing and assembling the large-size asymmetric special-shaped steel arch base according to claim 1, wherein the arch rib connecting section comprises an arch rib connecting section top plate, an arch rib connecting section bin partition plate, an arch rib connecting section bottom plate, an arch rib connecting section partition plate, an arch rib connecting section inner web plate, an arch rib connecting section outer web plate and a second stiffening rib; the top plate of the arch rib connecting section and the bottom plate of the arch rib connecting section are respectively and vertically connected to two ends of the outer web plate of the arch rib connecting section in the length direction to form three faces of a cuboid; the length and width of the top plate of the arch rib connecting section are equal to those of the bottom plate of the arch rib connecting section, and the length of the top plate of the arch rib connecting section is equal to that of the outer web plate of the arch rib connecting section; two arch rib connecting section partition boards which are parallel to each other are arranged between the arch rib connecting section top plate and the arch rib connecting section bottom plate, the length of each arch rib connecting section partition board is the distance between the arch rib connecting section top plate and the arch rib connecting section bottom plate, and the width of each arch rib connecting section partition board is the same as the width of the arch rib connecting section top plate; two arch rib connecting section inner webs which are parallel to each other and two arch rib connecting section warehouse partitions which are parallel to each other are arranged in the space between the arch rib connecting section top plate, the arch rib connecting section bottom plate, the arch rib connecting section outer webs and the arch rib connecting section warehouse partitions; the inner web of the arch rib connecting section is parallel to the outer web of the arch rib connecting section and is respectively and vertically connected with the top plate of the arch rib connecting section, the bottom plate of the arch rib connecting section and the partition plate of the arch rib connecting section; the arch rib connecting section bin partition plate is parallel to the arch rib connecting section top plate or the arch rib connecting section bottom plate, is vertical to the arch rib connecting section bin partition plate and is vertically intersected with the arch rib connecting section inner web plate; the arch rib connecting section bin partition plate divides the space between the inner web plate of the arch rib connecting section and the outer web plate of the arch rib connecting section into three spaces, and second stiffening ribs are respectively distributed on the outer web plates of the arch rib connecting section in the three spaces and are parallel to the top plate of the arch rib connecting section.
5. A method of assembling a large-scale asymmetric profiled steel abutment according to claim 1, wherein the support section comprises a support section top plate, a support section outer web, a support section inner web, a support section bottom plate, a support section bulkhead, and a third stiffener;
the support section top plate is a support section top plate unit, the support section outer web plate and the support section inner web plate are support body inner and outer web plate units, the support section bottom plate is a support section bottom plate unit, and third stiffening ribs which are criss-cross are arranged on the support section diaphragm plate;
the length of the top plate of the supporting section is the same as the width of one side of the bottom plate of the supporting section; the upper bottom width of the outer web plate of the supporting section is the same as that of the top plate of the supporting section, and the lower bottom width is the same as that of the other side of the bottom plate of the supporting section; a trapezoid prism is formed by a supporting section top plate, a supporting section bottom plate and two supporting section outer webs; in the trapezoid prism table, two parallel inner webs of the support section are distributed between the outer webs of the two support sections, and the inner webs of the support section and the outer webs of the support section are identical in shape and size; a supporting section diaphragm plate is arranged in the horizontal direction between the inner webs of the two supporting sections, and is fixedly connected with the inner webs of the two supporting sections; and a supporting section diaphragm plate is further arranged in the vertical direction between the inner webs of the two supporting sections and is respectively connected and fixed with the supporting section top plate and the supporting section diaphragm plate.
6. The method for splicing and assembling a large-size asymmetric special-shaped steel arch abutment according to claim 1, wherein the special-shaped steel arch abutment comprises an arch rib connecting section, a supporting section unit, a bearing plate unit and a lower cross beam; the supporting section unit is a trapezoid prismatic table, and the two arch rib connecting sections are respectively arranged on inclined planes at two sides of the supporting section unit through the bearing plate unit; the bottom of the supporting section unit is arranged on the lower cross beam; the support section unit comprises an inner web plate unit, an outer web plate unit, a support bearing plate unit, a support bottom plate unit and a support top plate unit.
7. A method for splicing and assembling a large-size asymmetric special-shaped steel arch abutment according to claim 1, wherein the method comprises the following steps:
(1) Preparing an inner web plate unit, an outer web plate unit, a support bearing plate unit, a support top plate unit and a support bottom plate unit of a support; the preparation method of the inner and outer web plate units of the support body comprises the following steps:
after the steel plate is pretreated, blanking, and marking out transverse and longitudinal datum lines, and cutting a butt edge groove by flame; assembling the components according to the base lines, and scribing the position lines of the stiffening ribs according to the lines; welding stiffening ribs according to the line assembly, correcting deformation, and mainly controlling planeness and perpendicularity of the stiffening ribs; correcting the transverse baseline and the longitudinal baseline after correcting the deformation, and handing over and assembling after the transverse baseline and the longitudinal baseline are qualified;
(2) Preparing a T-shaped cross beam; after the steel plate is pretreated, blanking, cutting the upper end slope of the web plate by taking the straight edge of the lower end of the web plate of the T-shaped cross beam as a reference flame, drawing a transverse reference line, and drawing a T-shaped cross beam stiffening rib assembly position line; tightly jacking and assembling a T-shaped structure formed by a T-shaped beam web plate and a T-shaped beam flange plate, performing submerged arc welding, and trimming deformation; welding the T-shaped beam stiffening ribs according to the line assembly, correcting deformation, mainly controlling flatness and perpendicularity of the T-shaped beam stiffening ribs, and handing over and assembling after the flatness and perpendicularity are qualified;
(3) Preparing an arch rib connecting section; sequentially assembling and welding an arch rib connecting section partition board, an arch rib connecting section bin partition board, an arch rib connecting section top board, an arch rib connecting section bottom board and an arch rib connecting section inner web board by taking an arch rib connecting section outer web board as a reference surface; hanging an outer web plate unit of the arch rib connecting section into a tire type, leveling, measuring the elevation value of the web plate, and ensuring the level of the web plate; dividing a partition board assembly position line by taking a web vertical base line as a reference, and connecting arch ribs with a partition board assembly position line of a bin; respectively hanging a top plate of the arch rib connecting section and a bottom plate unit of the arch rib connecting section to specified positions by using a crane to align the top plate and the bottom plate unit with an outer web of the arch rib connecting section, firmly jacking the top plate by using a jacking tool, tightly closing the outer web of the arch rib connecting section and a partition plate of the arch rib connecting section, and welding; completing welding, sandblasting and coating, and participating in the total splicing of the sections;
(4) Preparing a supporting section: leveling the bottom plate of the supporting section, measuring the elevation value of the bottom plate of the supporting section, and ensuring the level of the bottom plate of the supporting section; dividing an assembly line of an inner web plate of the supporting section, an outer web plate of the supporting section, a diaphragm plate of the supporting section and a bearing plate of the supporting section by using longitudinal and transverse references on a bottom plate of the supporting section; assembling a supporting section bottom plate and a supporting section diaphragm plate unit to the wires; positioning the bottom plate unit of the supporting section, positioning the inner web plate and the outer web plate of the supporting section, positioning the bearing plate unit of the supporting section and positioning the top plate unit of the supporting section respectively; marking an arch rib connecting section by taking a longitudinal and transverse baseline on a supporting section bearing plate as a reference, and installing a matching part;
(5) Splicing and assembling the asymmetric special-shaped steel arch base; positioning a lower cross beam on a special steel arch seat assembly jig frame for a wharf; hoisting the support body to the jig frame by using a floating crane, ensuring that the longitudinal and transverse baselines of the support body are aligned with the longitudinal and transverse baselines of the jig frame, and leveling the horizontal baselines of the support body units; hoisting the arch rib connecting section by using a floating crane, directly placing the lower part on a supporting matching part of a supporting body, and using a three-dimensional measuring instrument and a jack to coordinate with the fine adjustment connecting section to ensure that the deviation of the position line of a measuring point of an upper structure is not more than 2mm; and welding a welding line between the connecting body and the supporting body after the welding line is qualified, and after flaw detection, carrying out relief grinding to evenly follow the welding line and carrying out coating repair.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310422004.8A CN116275660A (en) | 2023-04-19 | 2023-04-19 | Splicing and assembling method for large-size asymmetric special-shaped steel arch base |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310422004.8A CN116275660A (en) | 2023-04-19 | 2023-04-19 | Splicing and assembling method for large-size asymmetric special-shaped steel arch base |
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| Publication Number | Publication Date |
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