CN115341488A - Bolting matching method for large section of ultra-long component - Google Patents

Abstract

The invention provides a bolting matching method for a large section of an ultra-long component, and belongs to the technical field of bridge construction. The technical scheme is as follows: dividing the beam section into a hollow box beam and a solid box beam; manufacturing beam sections, namely manufacturing single beam sections; beam section matching, namely firstly arranging a matching jig frame, then carrying out beam section adjustment, carrying out primary beam section matching, and further carrying out return matching and allowance trimming work in sequence; performing secondary beam section matching and performing matched drilling; and carrying out third beam section matching. The invention has the beneficial effects that: the invention adopts the mode of adding the temporary process partition plate and the code plate when the circular ports are matched, and can effectively control the integral size of the matched ports and the flatness of the end parts; a portable edge milling machine is adopted, and the flatness of a matching port is high; when the beam sections are matched, a three-way jack is matched for adjusting the matching clearance, so that the matching precision is high; when the fillet weld of the ring opening edge is welded, the welding shrinkage is released in advance, and the size of the welded ring opening can be effectively controlled.

Description

Bolting matching method for large section of ultra-long component

Technical Field

The invention relates to the technical field of bridge construction, in particular to a bolting matching method for a large cross section of an overlong member.

Background

When the large-section bolting of the traditional ultra-long component is matched, a single component is independently manufactured, and a welding line and allowance are reserved for matching, so that the matching method is low in matching precision, a ring opening matching gap cannot be controlled, and port misalignment is difficult to control in a small range; the port flatness can not be guaranteed, particularly the flatness of a thick plate can not be guaranteed, and a base plate is required to be used for adjustment when polishing and fire correction are necessary. This results in a hidden trouble in construction quality, and the construction period is affected and prolonged.

Disclosure of Invention

The invention aims to provide a bolting matching method for a large section of an overlong member. The technical scheme adopted by the invention is specifically as follows: comprises the steps of (a) carrying out,

s1, dividing a beam section into a hollow box beam and a solid box beam;

s2, beam section manufacturing, namely manufacturing a single beam section according to the divided beam sections;

s3, beam section matching, namely firstly arranging a matching jig frame, then carrying out beam section adjustment, carrying out beam section matching for the first time, and further carrying out return matching and allowance trimming work in sequence; performing secondary beam section matching and performing matched drilling; and carrying out third-time beam section matching, then installing support angle steel and an outer side sealing plate, and finally carrying out bolt protection sealing plate trial assembly.

Preferably, the first secondary beam section is matched in such a way that the hollow-web box girder is matched with the solid-web box girder according to a transverse datum line of a member;

the second beam section matching is to perform secondary matching according to beam section sample punching reference points which are positioned at two end parts of the central position of the beam section, and perform drilling and trial assembly on the splicing plates at the bottom of the component;

and the third beam section matching is to repeat the process of the second beam section matching, after the matched drill is completed, pre-place all internal splice plates in the box body before matching, recover the second matching state, perform integral trial assembly, test the integral data of the beam sections and check the fit clearance of the connecting plates.

Preferably, the S1 is specifically that the integral beam section is divided into two parts, one half is a hollow box girder, and the other half is a solid box girder, and the hollow box girder and the solid box girder are bolted by using an inner connecting plate, an outer connecting plate, an inner bolt protection sealing plate and an outer sealing plate through matching of ring openings;

the hollow-web box girder and the solid-web box girder respectively occupy one half of the girder section;

the hollow-web box girder, the solid-web box girder and the corresponding connecting plates are separately manufactured, and the girder sections are integrally matched after being formed.

Preferably, in the step S2, specifically,

s201, adding a process clapboard to the matching port before forming the four sides of the single beam section, and controlling the size of the matching port. The process partition plate is arranged at the end part of the box opening, so that the size of the box opening is ensured, and the deformation of the box opening is prevented.

A temporary supporting assembly is arranged at the joint of the two beam sections, the temporary supporting assembly is integrally a rectangular frame and comprises a transverse support and a longitudinal support, and reinforcing ribs are arranged in the temporary supporting assembly;

the temporary supporting component is prefabricated firstly, the flatness of the temporary supporting component is controlled to be 1mm/m, the whole thickness is not more than 2mm, and the diagonal line | L1-L2| is not more than 3mm. In order to enhance the integral rigidity of the process partition plate, reinforcing ribs are required to be added on the transverse support and the vertical support respectively. When the temporary supporting component is integrally installed, the top, the bottom and the web plate of the box opening need to be corrected, and the assembling clearance of the supporting component does not exceed 2mm;

s202, when a single beam section is manufactured, the self-made support angle steel of the sealing plate at the matching end part is not installed for the moment, when the single beam section is matched, the self-made support angle steel is installed in an integral marking mode, in order to control the flatness of the outer side sealing plate, the thickness of the self-made angle steel is reserved for 5mm when the self-made angle steel is manufactured, and milling is conducted through a milling machine;

s203, the edge and corner welding seam at the matched box opening is not welded temporarily, and the welding seam is welded after the integral misalignment of the box opening is adjusted to be qualified when the beam sections are matched;

and S204, in order to ensure the matching gap, at least 50mm of cutting allowance needs to be added to a matching port when a single beam section of the beam section is manufactured, and the cutting allowance is integrally scribed and repaired after matching.

Compared with the prior art, the invention has the following beneficial effects: the invention adopts the mode of adding the temporary process partition plate and the code plate when the circular ports are matched, and can effectively control the integral size of the matched ports and the flatness of the end parts; a portable edge milling machine is adopted, and the flatness of a matching port is high; when the beam sections are matched, a three-way jack is matched for adjusting the matching clearance, so that the matching precision is high; when the fillet weld of the ring opening edge is welded, the welding shrinkage is released in advance, and the size of the welded ring opening can be effectively controlled.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic view of a whole beam structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a hollow box girder according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a solid box girder according to an embodiment of the present invention.

Fig. 4 is a schematic view of a temporary support assembly according to an embodiment of the invention.

Fig. 5 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 4.

FIG. 6 is a schematic view of the welding and installation of the beam segment ports according to the embodiment of the invention.

Fig. 7 is a schematic diagram of the arrangement of the matching jig frame according to the embodiment of the invention.

Fig. 8 is a sectional view taken along line B-B of fig. 7.

Fig. 9 is a schematic diagram of a first matching process according to an embodiment of the present invention.

Fig. 10 is a schematic view of the installation of the code plate according to the embodiment of the present invention.

Fig. 11 is a cross-sectional view taken along line C-C of fig. 10.

Fig. 12 is a schematic diagram of a sample punch mark point according to an embodiment of the present invention.

Fig. 13 is a schematic drawing of a matching port scribe line according to an embodiment of the present invention.

Fig. 14 is a schematic view of an installation process of angle steel and a cover plate according to an embodiment of the present invention.

Wherein the reference numerals are: 1. a hollow box girder; 2. a solid box girder; 3. temporarily not installing the place; 4. temporarily not welding the position; 5. arranging a hollow box girder cylindrical jig frame; 6. arranging a solid box girder cylindrical jig frame; 7. a jack jig frame; 8. stacking plates; .

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.

Example 1

Referring to fig. 1 and 8, the present invention provides a technical solution comprising the steps of,

s1, dividing a beam section into a hollow-web box girder 1 and a solid-web box girder 2; the whole beam section is divided into two parts, one half is a hollow box girder 1, the other half is a solid box girder 2, and the hollow box girder 1 and the solid box girder 2 are formed by using an inner connecting plate, an outer connecting plate, an inner bolt protection sealing plate and an outer sealing plate through ring opening matching. Overall size 2500 (height) 3500 (width) 46663 (length), matching port size 2190 (height) 3200 (length);

the hollow-web box girder and the solid-web box girder respectively occupy one half of the girder section;

the hollow box girder 1, the solid box girder 2 and the corresponding connecting plates are separately manufactured, and the girder sections are integrally matched after being formed.

S2, beam section manufacturing, namely manufacturing a single beam section according to the divided beam sections;

s201, adding a process clapboard to the matching port before forming the four sides of the single beam section, and controlling the size of the matching port. The process partition plate is arranged at the end part of the box opening, so that the size of the box opening is ensured, and the deformation of the box opening is prevented.

A temporary supporting assembly is arranged at the butt joint of the two beam sections, the whole temporary supporting assembly is a rectangular frame and comprises a transverse support and a longitudinal support, and reinforcing ribs are arranged in the temporary supporting assembly;

the temporary supporting component is prefabricated firstly, the flatness of the temporary supporting component is controlled to be 1mm/m, the whole supporting component is not more than 2mm, and the absolute value of a diagonal line L1-L2 is not more than 3mm. In order to enhance the integral rigidity of the process partition plate, reinforcing ribs are required to be added on the horizontal and vertical supports respectively. When the temporary supporting component is integrally installed, the top, the bottom and the web plate of the box opening need to be corrected, and the assembling clearance of the supporting component does not exceed 2mm;

s202, during manufacturing of a single beam section, the self-made support angle steel of the sealing plate at the matching end is not installed temporarily, during matching, the self-made support angle steel is installed in a marking mode integrally, in order to control the flatness of the outer side sealing plate, the plate thickness is reserved for 5mm during manufacturing of the self-made angle steel, and milling is carried out through a milling machine;

s203, temporarily not welding the corner welding seam at the matched box opening, and welding the welding seam after the integral misalignment amount of the box opening is adjusted to be qualified when the beam section is matched;

and S204, in order to ensure the matching gap, at least 50mm of cutting allowance needs to be added to a matching port when a single beam section of the beam section is manufactured, and the cutting allowance is integrally scribed and repaired after matching.

S3, beam section matching, namely firstly arranging a matching jig frame, then carrying out beam section adjustment, carrying out beam section matching for the first time, and further carrying out return matching and allowance trimming work in sequence; performing secondary beam section matching and performing matched drilling; and carrying out third-time beam section matching, then installing support angle steel and an outer side sealing plate, and finally carrying out bolt protection sealing plate trial assembly.

The first beam section matching is that the hollow-web box girder 1 and the solid-web box girder 2 are matched according to the transverse datum line of the member;

the second beam section matching is that the beam section sample punching reference points are matched again according to the beam section sample punching reference points, the sample punching reference points are located at two end parts of the center position of the beam section, and drilling and trial assembly of the splicing plate at the bottom of the component are carried out;

and the third beam section matching is to repeatedly perform the process of the second beam section matching, and after the matched drill is completed, all internal splicing plates are placed in the box body in advance before matching, the second matching state is recovered, the whole trial assembly is performed, the whole data of the beam sections are measured, and the fitting gaps of the connecting plates are checked.

The hollow box girder 1, the solid box girder 2 and the corresponding connecting plates are separately manufactured, and the girder sections are integrally matched after being formed.

The step S3 specifically includes the steps of,

s301, arranging a matching jig frame, marking a ground sample line according to longitudinal and transverse reference lines of the component, controlling the error within +/-1 mm, arranging a cylindrical jig frame for matching, and firmly fixing the jig frame with embedded iron;

s302, adjusting the beam section; all other welding line works of the beam section except the edge and corner welding line of the matched port are respectively completed, the diagonal deviation of the single beam section is adjusted to be within 6mm, and the integral straightness deviation is less than or equal to 6mm; the integral torsion resistance of the box girder is less than or equal to 6mm; the rest of the welding work refers to all welding seams of the beam section except the edge and corner welding seam of the matched port, such as: and the welding seam, the web plate and the main welding seam of the top bottom plate in the structure.

S303, matching the first beam section, hoisting the hollow box beam 1 to a cylindrical jig frame according to a ground sample line after all welding works are finished, and positioning and adjusting the hollow box beam 1 by using four three-way jacks, wherein the positioning error is controlled within 2mm;

the solid-web box girder 2 is hoisted to the matched jig frame, and anti-collision measures need to be made during hoisting, so that the solid-web box girder is prevented from colliding with the positioned box girder to generate displacement. When the two beam sections are matched, matching is carried out according to the transverse datum lines, and the misalignment of the two transverse datum lines is ensured to be within 0-1 mm;

the position of the hollow box girder 1 is adjusted by using at least four three-way jacks to position and adjust the position of the hollow box girder 1;

the positioning adjustment of the solid box girder 2 is also suitable for three jacks.

The three jacks are distributed at one end of the box girder body close to the butt joint and the end part far away from the butt joint, when the box girder body is matched with the box girder body, the jack at the butt joint of the hollow box girder 1 is arranged between the box girder butt joint port and the jig, and the jack at the butt joint end of the solid box girder 2 is arranged between two jig supports close to the solid box girder 2.

S304, ring opening matching, wherein the hard baffle of the top and bottom abdomen and the adjacent misalignment within 300mm are controlled within 1mm, the misalignment within the other ranges (soft baffles) is controlled within 2mm, and the control of misalignment takes the middle of the gap of a matched port as a measurement reference; the hard stop here means the support that the web and the top plate can form, and the soft stop means no support.

Welding corner welds of the matched ports after adjustment is completed, connecting the two matched ports into a whole by using code plates on the inner side and the outer side during welding, reserving welding shrinkage allowance of 2mm during welding and symmetrically and sectionally skip welding, and inspecting the misalignment amount of the two matched ports after welding is completed;

s305, marking a margin line, measuring the whole length of the component, and marking a theoretical line and a margin trimming line of the matched port according to the measurement data and the longitudinal and transverse base lines;

the allowance cutting line = the theoretical line +2.5mm of the port, the matching gap is 10-20 mm, and allowance marking is carried out at 15mm during actual marking, namely, the allowance marking is carried out according to the tolerance of 10-20 mm, namely, the allowance marking is carried out according to 15mm, the allowance marking is not controlled according to a boundary value, and the marking positioning error is controlled to be +/-1 mm;

s306, margin trimming, namely shifting the beam section to ensure enough space for trimming the margin, knocking out and punching reference points at two end parts of the central position of the beam section before shifting the beam section, wherein the reference points are arranged on four surfaces and are respectively a top surface and a bottom surface and two web surfaces; repairing and cutting the closure allowance of the end part according to the allowance line by using a portable edge milling machine, and polishing smoothly, wherein the flatness of the end part of the closure hole is controlled to be 1mm/m, and the whole length is not more than 3mm;

the displacement of the beam sections can be realized no matter which beam section is selected, and only a machining space is reserved after the displacement of the beam sections is ensured. If the movable hollow section is far away from the solid section, the sections need to be unified from top to bottom, one section is still from top to bottom, and the whole process is to adjust one beam section.

S307, matching the beam sections for the second time, and matching again according to the beam section sample punching reference points, wherein the integral misalignment amount is less than or equal to 1mm during matching; and (3) pre-placing the bottom connecting plate in the box body before secondary matching, and moving the removed hollow-web beam section back to the original position by using a three-way jack during matching.

S308, drilling in a matched mode, taking the transverse base line of one beam section as an integral base line, drawing the hole group base lines (drawing the hole group base lines on the top and bottom bellies) and the extreme edge hole edge distance lines of the two beam sections, checking the hole edge distance (0 to +5 mm), and selecting any section after the beam sections are adjusted in place to serve as a drawing reference, wherein the section is a selected hollow-bellied section during operation;

when drilling, 4-8 drills are drilled

The product splice plates are installed according to longitudinal and transverse datum lines, M24 process bolts are used for fixing, and the process bolts are screwed with certain pre-tightening force (400-1000 N.m);

drilling at least 8 positioning holes for drilling, using 4

Punching nails and 4M 36 bolts are screwed and positioned, other hole groups are drilled after the installation is finished, and the inspection is carried out after the processing is finished;

installing a product connecting plate after the hole group is qualified, wherein the joint gap between the product connecting plate and a member is less than 1mm, and a single hole group process bolt is not less than 20% and a punching nail is not less than 10% during installation;

s309, matching the beam sections for the third time, shifting the beam sections, repeating the step S307 for matching, and only matching again after the completion of the matched drilling because the matching space is narrow and can not place all internal splice plates in advance inside the box body. Inside all inside splice plates were placed the box in advance before the matching, resume the secondary beam section and match the state, carry out whole examination dress, lead to survey the whole data of beam section, and the laminating clearance of inspection connecting plate. The recovery of the second beam segment matching state referred to herein means that the beam segment is adjusted to a qualified state: the straightness, the port clearance and the overall size are all in the qualified range.

S310, mounting support angle steel and an outer side sealing plate, wherein the support angle steel around the matched port is mounted, the angle steel is symmetrically mounted according to a matching gap during mounting, and the integral flatness of an outer plane is controlled to be +/-2 mm;

mounting a bolted cover plate, and drilling the bolted cover plate and the support angle steel in a matching manner, wherein due to the fact that the bolted cover plate is in a threaded hole, when the bolted cover plate is not matched, a bottom hole is drilled first, the bolted cover plate is positioned in a matching manner with the angle steel, and then the threaded hole is integrally drilled, so that secondary tapping of the bolted cover plate is avoided, and threads are damaged;

s311, bolt protection shrouding tries on clothes, and because the narrow and small and single inboard bolt protection shrouding weight of matching port space is heavier, if inboard bolt protection shrouding places the inside whole dress of trying on clothes of box, the difficult operation and installation are inconvenient during the dress of trying on clothes. Therefore, the inner bolt protection sealing plate and the connecting plate need to be separately installed outside the box body in a trial mode, and the fit clearance is checked.

Example 2

On the basis of the embodiment 1, the scheme can be carried out according to the following steps:

the method comprises the following steps: beam segment division

The integral beam section is formed by bolting an inner connecting plate, an outer connecting plate, an inner bolt protective sealing plate and an outer sealing plate through a ring opening matching between a 1/2 hollow box girder and a 1/2 solid box girder. Overall size 2500 (height) 3500 (width) 46663 (length) and mating port size 2190 (height) 3200 (length), as in fig. 1-3.

The 1/2 open web type box girder, the 1/2 solid web type box girder and the corresponding connecting plates are separately manufactured, and the girder sections are integrally matched after being formed.

Step two: beam segment fabrication

2.1 before the four sides of a single beam section are formed, a process clapboard needs to be added at the matching port to control the size of the matching port. The flatness of the temporary supporting component is firstly prefabricated into a component, the flatness is controlled to be 1mm/m, the whole thickness is not more than 2mm, and the diagonal line | L1-L2| is not more than 3mm. In order to enhance the integral rigidity of the process partition plate, reinforcing ribs are required to be added on the horizontal and vertical supports respectively. When the temporary supporting component is integrally installed, the top, the bottom and the web plate of the box opening need to be corrected, and the assembling clearance of the supporting component does not exceed 2mm. See fig. 4 and 5

2.2 the shrouding self-control support angle steel of matching the tip during single beam section preparation does not install temporarily, and the installation of whole marking off during the matching, in order to control the roughness of outside shrouding, thick reservation 5mm of board when self-control angle steel preparation uses the milling machine to mill the processing.

2.3 the corner weld at the matching box mouth is not welded temporarily, the weld is welded after the adjustment of the whole misalignment of the box mouth is qualified when the beam section is matched, and the temporary non-installation part 3 and the temporary non-welding part 4 are shown in fig. 6.

2.4 to ensure the matching clearance, the cutting allowance of 50mm needs to be increased when the matching port is manufactured by a single beam section of the beam section. And after matching, integrally scribing and trimming allowance.

Step three: beam section matching process

3.1 matching jig arrangement:

the error of the ground sample line scribed according to the longitudinal and transverse reference lines of the component is controlled within +/-1 mm, and a cylindrical jig frame for matching is arranged, wherein the jig frame needs to be firmly fixed with an embedded drawing, and the method is shown in figures 7 and 8.

3.2 Beam segment adjustment

All other welding line works of the beam sections except the edge and corner welding line of the matched port are respectively completed, the diagonal deviation of a single beam section is adjusted to be within 6mm, and the integral straightness deviation is less than or equal to 6mm; the integral torsion resistance of the box girder is less than or equal to 6mm.

3.3 Beam section matching (for the first time)

And after all welding works are finished, hoisting the 1/2 of the hollow box girder to the cylindrical jig frame according to the ground sample line, and positioning and adjusting the girder by using four three-way jacks, wherein the positioning error is controlled within 2mm. And hoisting the 1/2 solid box girder to the matched jig frame, wherein an anti-collision measure needs to be made during hoisting, so that the situation that the 1/2 solid box girder collides with the positioned box girder to generate displacement is avoided. When the two beam sections are matched, the matching is carried out according to the transverse datum lines, and the misalignment of the two transverse datum lines is guaranteed to be within 0-1 mm, as shown in figure 9.

3.4 Ring mouth matching

The hard baffle of the top and bottom belly and the misalignment in the adjacent range of 300mm are controlled within 1mm, the misalignment in the other range (soft baffle) is controlled within 2mm (the middle of the gap of the matched port is used as a measurement reference), the edge and corner welding seam of the matched port is welded after the adjustment is completed, the two matched ports need to be connected into a whole by using a code plate on the inner side and the outer side during welding, the welding shrinkage allowance of 2mm needs to be reserved during welding, symmetrical segmented skip welding is needed, and the misalignment of the two matched ports is checked after the welding is completed, which is shown in fig. 10 and fig. 11.

3.5 draw margin line

The overall length of the component is measured, a theoretical line and a residual cutting line of a matched port are marked according to measurement data and a longitudinal base line and a transverse base line, the residual cutting line = the theoretical line +2.5mm of the port (the matching gap is 10-20 mm, and the residual cutting line is marked 15mm during actual cutting), and the marking positioning error is controlled to be +/-1 mm.

3.6 allowance trimming

The beam section is shifted to ensure enough space for trimming and cutting allowance, and before the beam section is shifted, sample punching reference points (four surfaces) are required to be knocked at two end parts of the center of the beam section. And trimming the closing allowance of the end part according to the allowance line by using a portable edge milling machine, polishing the closing allowance to be smooth, controlling the flatness of the end part of the closing hole to be 1mm/m, wherein the whole length of the closing hole is not more than 3mm, and the punching reference point, namely the punching mark point is shown in figures 12 and 13.

3.7 Beam section match (second time)

And (4) punching the reference points according to the beam section sample for secondary matching, wherein the integral misalignment amount is less than or equal to 1mm during matching. And the bottom connecting plate is placed in the box body in advance before secondary matching.

3.8 matching borehole

And drawing hole group reference lines (top and bottom ventral) and polar edge hole edge distance lines of the left side beam section and the right side beam section by taking a transverse base line of the left side section as an overall reference line, and checking hole edge distances (0 to +5 mm). While drilling

Drill 4-8

The positioning holes are provided with product splicing plates according to longitudinal and transverse datum lines, M24 process bolts are used for fixing, and the process bolts are screwed with certain pretightening force (400-1000 N.m).

Drilling at least 8 positioning holes, using 4

And (4) punching nails and 4M 36 bolts are screwed and positioned, the rest hole groups are drilled after the installation is finished, and the inspection is reported after the processing is finished.

And installing a product connecting plate after the hole group is qualified, wherein the joint gap between the product connecting plate and the member is less than 1mm, and the process bolt of a single hole group is not less than 20% and the impact nail is not less than 10% during installation.

3.9 Beam section match (third time)

The beam section is shifted, the step 3.7 is repeated for matching, and all the internal splice plates cannot be placed in the box body in advance due to narrow matching space, so that the matching can only be completed after the matching is finished. And (3) placing all internal splicing plates inside the box body in advance before matching, recovering the second matching state, carrying out whole trial assembly, testing the whole data of the beam section, and checking the fit clearance of the connecting plates.

3.10 installation of support angle steel and outside shrouding

The periphery of the matched port is provided with the supporting angle steel, the angle steel needs to be symmetrically installed according to a matching gap during installation, and the integral flatness of the outer plane is controlled to be +/-2 mm.

And (4) installing the bolted cover plate, and drilling the bolted cover plate and the support angle steel in a matching manner, wherein due to the fact that the bolted cover plate threaded hole is drilled, when the bolted cover plate is not matched, the bottom hole and the angle steel are drilled firstly, the threaded hole is drilled in a matching manner, and after the matched positioning is finished, the threaded hole is integrally drilled, so that the secondary tapping of the bolted cover plate is avoided, and the threads are damaged.

3.11 bolt protection shrouding tries on clothes

Because the matching port space is narrow and small and the weight of a single inboard bolt protection shrouding is heavier, if the inboard bolt protection shrouding is placed the inside whole dress of trying on of box, difficult operation and installation are inconvenient during the dress of trying on. Therefore, the inner bolt protection sealing plate and the connecting plate need to be independently trial-assembled outside the box body, and the fit clearance is checked.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (10)

1. A bolting matching method for a large section of an overlong component is characterized by comprising the following steps,

s1, dividing a beam section into a hollow box beam and a solid box beam;

s2, beam section manufacturing, namely manufacturing a single beam section according to the divided beam sections;

s3, beam section matching, namely firstly arranging a matching jig frame, then adjusting the beam section, performing primary beam section matching, and further sequentially performing returning matching and allowance trimming; performing secondary beam section matching and performing matched drilling; and carrying out third-time beam section matching, then installing support angle steel and an outer side sealing plate, and finally carrying out bolt protection sealing plate trial assembly.

2. The bolting matching method for a large section of an overlength member according to claim 1, wherein said first sub-section matching is such that a belly box girder and a solid box girder are matched according to a cross reference line of the member;

the second beam section matching is to perform secondary matching according to beam section sample punching reference points which are positioned at two end parts of the central position of the beam section, and perform drilling and trial assembly on the splicing plates at the bottom of the component;

and the third beam section matching is to repeatedly perform the process of the second beam section matching, after the drill matching is completed, pre-place all internal splicing plates inside the box body before matching, restore the second matching state, perform whole trial assembly, and test the whole data of the beam sections and check the fit clearance of the connecting plates.

3. The bolting matching method for the large section of the overlong member according to claim 1, wherein S1 is specifically that an integral beam section is divided into two parts, one half is a hollow box girder, the other half is a solid box girder, and the hollow box girder and the solid box girder are formed by ring mouth matching bolting;

the hollow-web box girder, the solid-web box girder and the corresponding connecting plates are separately manufactured, and the girder sections are integrally matched after being formed.

4. The bolting matching method for a large section of an ultra-long member according to claim 1, wherein said step S2 is specifically,

s201, adding a process clapboard at a matching port before four sides of a single beam section are formed,

a temporary supporting assembly is arranged at the butt joint of the two beam sections, the whole temporary supporting assembly is a rectangular frame and comprises a transverse support and a longitudinal support, and reinforcing ribs are arranged in the temporary supporting assembly;

the temporary supporting component is prefabricated, the flatness of the temporary supporting component is controlled to be 1mm/m, the whole thickness is not more than 2mm, and the diagonal line | L1-L2| is not more than 3mm; the temporary supporting component is integrally installed to correct the top, the bottom and the web plate of the box opening, and the assembling clearance of the supporting component is not more than 2mm;

s202, when a single beam section is manufactured, sealing plates at the matched end part are not installed at home-made supporting angle steel for the moment, when the single beam section is matched, the sealing plates are installed in a marking mode integrally, and the plate thickness is reserved for 5mm when the self-made angle steel is manufactured;

s203, temporarily not welding the corner welding seam at the matched box opening, and welding the welding seam after the integral misalignment amount of the box opening is adjusted to be qualified when the beam section is matched;

and S204, increasing cutting allowance of at least 50mm for a matching port during manufacturing of a single beam section of the beam section, and integrally scribing and repairing the cutting allowance after matching.

5. The bolting matching method for large cross-sections of very long elements, according to claim 1, characterized in that said step S3 comprises in particular,

s301, matching jig frame arrangement;

s302, adjusting the beam section;

s303, matching the first secondary beam section;

s304, matching ring openings;

s305, drawing a margin line;

s306, trimming the allowance;

s307, matching the second beam section;

s308, drilling holes in a matching mode;

s309, matching the third secondary beam section;

s310, mounting a support angle steel and an outer side sealing plate;

s311, trial assembling of the bolt protection sealing plate.

6. The bolting matching method for the large section of the overlong member according to claim 5, wherein the step S301 is to arrange the matching jig frame, specifically, draw ground sample lines according to longitudinal and transverse reference lines of the member, arrange a cylindrical jig frame for matching, and firmly fix the jig frame and the embedded iron;

step S302, beam section adjustment specifically comprises the steps of respectively finishing all other welding line work of the beam section except for edge and corner welding lines of a matched port, adjusting the diagonal deviation of a single beam section to be within 6mm, and adjusting the integral straightness deviation to be less than or equal to 6mm; the integral torsion resistance of the box girder is less than or equal to 6mm

Step S303, the first beam section matching is specifically that after all welding works are finished, the hollow box beam is hoisted to the cylindrical jig frame according to a ground sample line, the hollow box beam is positioned and adjusted, and the positioning error is controlled within 2mm;

and hoisting the solid-web box girder to a matching jig frame, matching the two girder sections according to the transverse datum line when the two girder sections are matched, and keeping the misalignment of the two transverse datum lines within 0-1 mm.

7. The bolting matching method for the large section of the ultra-long member according to claim 6, wherein in step S303, the positioning adjustment of the diabolo-type box girder is performed by using at least four three-way jacks to perform positioning adjustment of the position of the diabolo-type box girder;

the three jacks are also suitable for positioning and adjusting the solid box girder.

8. The bolting matching method for the large section of the overlong member according to claim 6, wherein in the step S304, the ring mouth matching is specifically that the hard stop of the top and bottom abdomen and the adjacent misalignment within 300mm are controlled within 1mm, the misalignment within the other ranges is controlled within 2mm, and the misalignment is controlled by taking the middle of the gap of the matching port as a measurement reference;

welding corner welds of the matched ports after adjustment is completed, connecting the two matched ports into a whole by using code plates on the inner side and the outer side during welding, and inspecting the misalignment amount of the two matched ports after welding is completed;

step S305, marking a margin line, namely marking a theoretical line and a margin trimming line of the matched port according to the measurement data and the longitudinal and transverse base lines by measuring the whole length of the component;

the residual cutting line = 2.5mm + the theoretical line of the port, the matching gap is 10-20 mm, and the marking and positioning errors are controlled to be +/-1 mm;

the step S306 of allowance trimming specifically includes displacing the beam section to ensure a sufficient space for trimming the allowance, and knocking out and punching reference points at two end portions of the center of the beam section before the beam section is displaced; trimming the closure allowance of the end part according to the allowance line, controlling the flatness of the end part of the closure hole to be 1mm/m, and keeping the whole thickness to be not more than 3mm;

step S307, the second beam section matching is specifically to match again according to the beam section sample punching reference point, and the integral misalignment amount is less than or equal to 1mm during matching; and the bottom connecting plate is placed inside the box body in advance before secondary matching.

9. The bolting matching method for the large section of the ultra-long member according to claim 8, wherein said step S308 of matching drilling is to use the cross-base line of one of the beam sections as an overall reference line, to scribe the hole group reference line and the extreme edge hole margin line of the two beam sections and check the hole margin;

when drilling, 4-8 drills are drilled

The product splice plates are installed according to longitudinal and transverse datum lines, M24 process bolts are used for fixing, and the process bolts are screwed with certain pre-tightening force (400-1000 N.m);

drilling at least 8 positioning holes for drilling, using 4

Punching nails and 4M 36 bolts are screwed and positioned, and other hole groups are drilled after the installation is finished;

installing a product connecting plate, wherein the joint gap between the product connecting plate and a member is less than 1mm, and when the product connecting plate is installed, the process bolt of a single hole group is not less than 20 percent, and the impact nail is not less than 10 percent;

the step S309 and the third beam segment matching specifically include that the beam segments are shifted, the step S307 is repeated to perform matching, all internal splice plates are pre-placed inside the box body before matching, whole trial assembly is performed, whole data of the beam segments are measured, and fit gaps of the connecting plates are checked.

10. The bolting matching method for the large section of the overlong component according to claim 9, wherein the step S310, the support angle steel and the outer side sealing plate are installed specifically, the support angle steel around the matching port is installed, and the overall flatness of the outer plane is controlled within ± 2mm when the angle steel is installed;

installing a bolted cover plate, and drilling the bolted cover plate and the support angle steel;

step S311, trial-assembling the bolt protection sealing plate specifically includes that the inner side bolt protection sealing plate and the connecting plate need to be trial-assembled outside the box body separately, and the fitting gap is checked.

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