CN113585098B - Construction method of steel structure bridge of super-large bridge - Google Patents
Construction method of steel structure bridge of super-large bridge Download PDFInfo
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- CN113585098B CN113585098B CN202111142426.7A CN202111142426A CN113585098B CN 113585098 B CN113585098 B CN 113585098B CN 202111142426 A CN202111142426 A CN 202111142426A CN 113585098 B CN113585098 B CN 113585098B
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- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The invention discloses a construction method of a steel structure bridge of a super bridge, which comprises a bridge deck system block body, a main truss piece, a rope frame, a main jig frame, a rope box, a rope, an auxiliary jig frame, a cross truss piece and an upper flat web member, wherein the bridge deck system block body comprises a bottom plate, a longitudinal clapboard, a longitudinal web plate, a small longitudinal beam, a cross T rib, a bridge deck plate and a cross beam. The quality of the bridge is guaranteed, and the use of personnel is guaranteed.
Description
Technical Field
The invention relates to the technical field of steel structure bridges, in particular to a construction method of a steel structure bridge of a grand bridge.
Background
The bearing structure of the super-large bridge composed of steel structures is made of steel materials, and the super-large bridge can be assembled into assembled steel bridges with different loads and different spans according to requirements.
Current steel structure bridge is because steel structure accessory is bulky and weight is heavier, all brings inconvenience for personnel's operation in transportation and work progress, and personnel can't carry out the segmentation concatenation to the bridge, lead to steel structure bridge's the consuming time power of construction, and personnel can't fix a position the concatenation in advance to the bridge, easily lead to appearing unable location inaccurate in the bridge work progress, cause the bridge to appear quality problems unable use.
Disclosure of Invention
The invention aims to provide a construction method of a steel structure bridge of a grand bridge, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method of a super bridge steel structure bridge comprises a bridge deck system block body, a main truss piece, a rope frame, a main jig frame, a rope box, a rope, an auxiliary jig frame, a cross truss piece and an upper flat web member, wherein the bridge deck system block body comprises a bottom plate, a longitudinal partition plate, a longitudinal web plate, a small longitudinal beam, a cross T rib, a bridge deck plate and a cross beam, the main truss piece comprises a lower chord member, an upper chord member, a guy cable anchor box, a short diagonal web member, a long diagonal web member and a straight web member, and the construction method of the super bridge steel structure bridge comprises the following steps:
1) the setting of bed-jig: the method comprises the following steps that a corresponding number of main tire frames and auxiliary tire frames are arranged according to the whole bridge, the main tire frames are used for connecting main truss sheets, the center and the slope changing points of a bridge deck system block are used for connecting the auxiliary tire frames, the three-dimensional general assembly of beam sections is completed on a large-scale positive assembly tire frame, the beam section vertical assembly tire frame is set to be a general positive assembly tire frame, the basic tire frame meets the general assembly requirements of different wheel numbers, each wheel manufacturing is positioned according to the ground auxiliary line of the corresponding wheel number, the design of the tire frame needs to have universality, and buttress points meet the use requirements of all wheel numbers; the jig frame buttress has enough rigidity, enough bearing capacity and stability, and cannot sink, shift or deform; the size of the buttress of the total assembling jig frame is accurately measured, the plane position and the elevation of the buttress top are controlled by a measuring net, the whole section assembling jig frame is provided with a longitudinal slope, and the line type is strictly consistent with the line type of a formed bridge; the flatness of the top surface of the steel component on the jig frame buttress is less than 0.5 mm; longitudinal and transverse base lines and reference points are arranged on the jig frame, and auxiliary lines of the jig frame are arranged according to the drawing; monitoring measurement points are arranged on the jig frame, displacement, deformation, damage and buttress settlement of each part of the jig frame are monitored in the general assembling process, if the phenomenon occurs, the occurrence reason and monitoring data of the phenomenon need to be analyzed and researched immediately to determine whether to repair the jig frame and take effective remedial measures so as to ensure that the vertical assembling is not influenced; the jig frame is qualified in quality and safety requirements by a quality guarantee department and a project supervision, a quality record table is filled, and the jig frame is used after signature confirmation; after the whole segment of each round of tire discharging, the jig frame is adjusted again according to the linear data of the next round, and the jig frame can be used after being detected again and qualified, and detection records are made; in the process of the total assembly, a steel beam or other rigid components cannot collide with a jig frame, the jig frame cannot be cut randomly, the integrity of the jig frame needs to be kept, and meanwhile, when the jig frame is idle, the jig frame is protected;
2) preparing a bridge deck: the bridge deck system blocks need to be welded and assembled before use, and the upper tire assembly of the bottom plate sequentially positions, inspects and welds the bottom plate according to the ground sample line of the tire frame; welding from the middle to the two sides in sequence, and welding the longitudinal bridge from the reference end to the non-reference end; marking out various structure positioning lines on the bottom plate; sequentially positioning and assembling the longitudinal web, the cross beam, the longitudinal partition plate and the transverse T-shaped rib component from the center to the periphery according to the positioning line; welding outwards from the middle partition plate in sequence by adopting a double number of welders; the welding sequence for each compartment was: a. welding fillet welds of the middle longitudinal web and the bottom plate; b. welding web fillet welds of the longitudinal partition plates and the transverse T-shaped ribs, welding from bottom to top, and welding corresponding wing plate butt welds; c. welding fillet welds of the longitudinal partition plates, the transverse T ribs and the bottom plate; d. welding fillet welds of the longitudinal partition plates, the longitudinal web plates and the cross beam from bottom to top; e. welding fillet welds of the cross beam and the bottom plate; welding is started after the assembly of one cabin is finished; then, the small longitudinal beams pass through the cross beam from one end, the bridge deck is assembled and spliced according to the ground sample line and the bridge deck reference line, and the bridge deck is sequentially positioned and assembled from the middle to the two sides; bridge deck horizontal datum line: 100mm from the reference end; longitudinal datum line of bridge deck: welding fillet welds of the small longitudinal beam and the bridge deck, welding butt joints of the bridge deck, welding fillet welds of the bridge deck and the cross beam, and correcting welding deformation;
3) assembling truss pieces: positioning the upper chord and the upper tire of the lower chord according to the positioning of the upper tire of the auxiliary line of the tire frame, positioning the lower chord and then positioning the upper chord; in the positioning of the lower chord, the center system line of the small end node is longitudinally positioned by taking the center system line of the small end node as a reference, the center system line of the small end node is transversely positioned by a preset camber value in a factory, and the center system line is rigidly fixed after the positioning; in the positioning of the upper chord member, the small end node central system line is longitudinally used as a reference for positioning, the distance between the transverse direction and the system line of the lower chord member is positioned according to the tolerance of +4mm, the welding shrinkage of the web member is reserved, and the web member is elastically fixed; then, the web members are assembled and assembled to form a straight web member, a long oblique web member and a short oblique web member in sequence; assembling the upper chord and the lower chord of the adjacent matching section into an upper chord and a lower chord pair of the adjacent matching section, and assembling the adjacent connectors according to a +20mm matching total; assembling adjacent matching short diagonal web members, sequentially assembling the upper chord member, the lower chord member and the web members of adjacent matching sections to the line, after the line is positioned, performing assembling overall line type adjustment to ensure the precision requirement, paying special attention to the inspection of the port, then performing welding, correcting the welding deformation and ensuring the port matching precision; correcting the system line after the correction inspection is qualified; matching, butting and splicing plates by taking group holes at two ends of adjacent rod pieces as templates; matching and butting splice plates by taking the upper chord member node plate and the inhaul cable anchor box group holes as templates, and drilling positioning holes; according to the corrected system line, splicing the line groups and leveling the joint members;
4) the beam sections are vertically spliced: positioning the bridge deck system block by aligning, finely adjusting the elevation of a bottom plate of the bridge deck by adopting a cushion plate landing pad arranged on a buttress to meet the requirement, and enabling the reference line of the bridge deck to be consistent with the longitudinal and transverse reference lines of the auxiliary line of the jig frame; then, assembling the main truss pieces and the bridge deck system blocks, adjusting the axis, the verticality and the elevation of the main truss, matching and adjusting the beam joint plates and the bridge deck sectional beams, accurately positioning, and adding temporary support to prevent the truss pieces from toppling; secondly, performing horizontal and transverse connection assembly, accurately positioning a horizontal connection truss sheet and an upper horizontal connection web member, and temporarily solidifying the horizontal connection truss sheet, wherein the positioning needs to ensure the elevation requirement of the horizontal connection truss sheet, the reference center line of the horizontal connection truss sheet is matched with the reference center line of a beam section, the diagonal dimension between sheet bodies needs to be measured again after the adjacent horizontal connection truss sheets are positioned, and then welding the sections to form an integral section and transporting the integral section to a bridge site for erection and assembly;
5) and (3) overall splicing of the bridge: installing the integral sections on a main jig frame and an auxiliary jig frame of a bridge, aligning and positioning the sections and another bridge deck system block, then matching a main truss sheet for splicing, then matching a transverse truss sheet and an upper flat connecting web member for splicing, and then welding, wherein the welding is delayed by one beam section compared with the splicing positioning, the welding of the first beam section is carried out after the second beam section is spliced, and the welding of the next section can be started after all welding seams in one section are welded and inspected to be qualified until the last section is spliced and welded, so that the main bridge body is spliced;
6) assembling the rope: the main tire frame is provided with a rope frame, the rope frame is provided with a rope box, and the rope passes through the rope box and sequentially penetrates the two ends of the rope box into the inhaul cable anchor boxes corresponding to the positions of the inhaul cable anchor boxes, so that the whole assembly of the bridge is completed.
Preferably, the bridge floor system block includes the bottom plate, the top of bottom plate is fixed and is equipped with a plurality of vertical separators, two avris on bottom plate top are all fixed and are equipped with horizontal T rib, and are a plurality of vertical separators's outer wall alternates with the first interlude hole that a plurality of crossbeams were seted up respectively and is connected, and is a plurality of fixed being equipped with a plurality of web of indulging between the crossbeam.
Preferably, a plurality of second penetrating holes are formed in the surface of each cross beam, the second penetrating holes are opposite to the second penetrating holes and are connected with the surfaces of the corresponding small longitudinal beams in a penetrating mode, and the top ends of the longitudinal webs, the top ends of the cross beams and the top ends of the small longitudinal beams are fixedly connected with the surface of the bottom end of the bridge deck.
Preferably, the main truss piece includes the lower chord, the both sides on lower chord top all are fixed and are equipped with straight web member, two it is fixed with long oblique web member, two to be equipped with between the straight web member the top of straight web member respectively with the both sides fixed connection of upper chord bottom.
Preferably, the avris on lower chord top and the avris of upper chord bottom all fix and are equipped with short oblique web member, the both sides on upper chord top all are fixed and are equipped with cable anchor case.
Preferably, two transverse truss sheets are fixedly arranged between the two main truss sheets, and a plurality of upper flat web connecting rods are fixedly arranged on each two transverse truss sheets.
Preferably, the bottom of main purlin piece and one side fixed connection on main bed-jig top, the middle part and the both sides of bridge floor system block body bottom all with the top fixed connection who corresponds vice bed-jig, the fixed rope frame that is equipped with of opposite side on main bed-jig top, the top of rope frame and the bottom fixed connection of rope case, the inside interlude of rope case is equipped with a plurality of ropes, every the both ends of rope are connected with the inside interlude of cable anchor case respectively.
The invention has the technical effects and advantages that:
according to the construction method of the steel structure bridge of the super bridge, inconvenience brought to transportation and construction processes due to the fact that steel structure accessories are too large in size and heavy in weight can be effectively avoided by using the method for constructing and constructing the steel structure bridge, all components can be manufactured in advance and assembled in a factory, and therefore it is guaranteed that workers are more convenient to construct and operate the steel structure bridge, construction of the steel structure bridge is convenient and rapid, and meanwhile, when the steel structure bridge is assembled, all components of the steel structure bridge can be positioned and calibrated in advance, so that positioning of all structures of the bridge is accurate during construction, bridge quality is guaranteed, and use of the workers is guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic view of the present invention;
FIG. 3 is a schematic view of a connection structure of the main girder pieces according to the present invention;
FIG. 4 is a schematic view of the connection of the main beam panel and the cross beam panel of the present invention;
FIG. 5 is a schematic structural view of a main web of the present invention;
FIG. 6 is a schematic view of the structure of the bridge deck block of the present invention.
In the figure: 1. a bridge deck system block; 101. a base plate; 102. a longitudinal partition plate; 103. a longitudinal web; 104. a minor stringer; 105. a transverse T-rib; 106. a bridge deck; 107. a cross beam; 2. a main truss sheet; 201. a lower chord; 202. an upper chord; 203. a cable anchor box; 204. a short diagonal web member; 205. a long diagonal web member; 206. a straight web member; 3. a rope rack; 4. a main jig frame; 5. a rope box; 6. a rope; 7. a sub-jig; 8. cross-linking the truss pieces; 9. the upper flat is connected with the web member.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a construction method of a steel structure bridge of a grand bridge, as shown in figures 1-6, the steel structure bridge of the grand bridge comprises a bridge deck system block 1, a main truss 2, a rope frame 3, a main jig frame 4, a rope box 5, a rope 6, an auxiliary jig frame 7, a transverse truss 8 and an upper parallel web member 9, the bridge deck system block 1 comprises a bottom plate 101, a longitudinal partition plate 102, a longitudinal web plate 103, a small longitudinal beam 104, a transverse T rib 105, a bridge deck 106 and a cross beam 107, the main truss 2 comprises a lower chord 201, an upper chord 202, a guy cable anchor box 203, a short diagonal web member 204, a long diagonal web member 205 and a straight web member 206, and the construction method of the steel structure bridge of the grand bridge comprises the following steps:
1) the setting of bed-jig: the method comprises the following steps that a corresponding number of main tire frames 4 and auxiliary tire frames 7 are arranged according to the whole bridge, the main tire frames 4 are used for connecting main truss pieces 2, the center and the variable slope points of a bridge deck system block body 1 are used for connecting the auxiliary tire frames 7, the three-dimensional general assembly of beam sections is completed on a large-scale positive assembly tire frame, the beam section vertical assembly tire frame is set to be a general positive assembly tire frame, the basic tire frame meets the general assembly requirements of different wheel numbers, each wheel number is manufactured and positioned according to the ground auxiliary line of the corresponding wheel number, the design of the tire frame needs to have universality, and buttress points meet the use requirements of all the wheel numbers; the jig frame buttress has enough rigidity, enough bearing capacity and stability, and cannot sink, shift or deform; the size of the buttress of the total assembling jig frame is accurately measured, the plane position and the elevation of the buttress top are controlled by a measuring net, the whole section assembling jig frame is provided with a longitudinal slope, and the line type is strictly consistent with the line type of a formed bridge; the flatness of the top surface of the steel component on the jig frame buttress is less than 0.5 mm; longitudinal and transverse base lines and reference points are arranged on the jig frame, and auxiliary lines of the jig frame are arranged according to the drawing; monitoring measurement points are arranged on the jig frame, displacement, deformation, damage and buttress settlement of each part of the jig frame are monitored in the general assembling process, if the phenomenon occurs, the occurrence reason and monitoring data of the phenomenon need to be analyzed and researched immediately to determine whether to repair the jig frame and take effective remedial measures so as to ensure that the vertical assembling is not influenced; the jig frame is qualified in quality and safety requirements by a quality guarantee department and a project supervision, a quality record table is filled, and the jig frame is used after signature confirmation; after the whole segment of each round of tire discharging, the jig frame is adjusted again according to the linear data of the next round, and the jig frame can be used after being detected again and qualified, and detection records are made; in the process of the total assembly, a steel beam or other rigid components cannot collide with a jig frame, the jig frame cannot be cut randomly, the integrity of the jig frame needs to be kept, and meanwhile, when the jig frame is idle, the jig frame is protected;
2) preparing a bridge deck: the bridge deck system block 1 is required to be welded and assembled before use, and the base plate 101 is assembled by a tire assembly in sequence according to a tire frame ground sample line to be positioned, inspected and welded; welding from the middle to the two sides in sequence, and welding the longitudinal bridge from the reference end to the non-reference end; marking out various structure positioning lines on the bottom plate 101; sequentially positioning and assembling the longitudinal web 103, the cross beam 107, the longitudinal partition plate 102 and the transverse T-shaped rib 105 from the center to the periphery according to a positioning line; welding outwards from the middle partition plate in sequence by adopting a double number of welders; the welding sequence for each compartment was: a. fillet welds of the middle longitudinal web 103 and the bottom plate 101 are welded; b. welding web fillet welds of the longitudinal partition plates 102 and the transverse T-shaped ribs 105, welding from bottom to top, and then welding corresponding wing plate butt welds; c. fillet welds of the longitudinal partition plates 102, the transverse T-shaped ribs 105 and the bottom plate 101 are welded; d. fillet welds of the longitudinal partition plates 102, the longitudinal web plates 103 and the cross beams 107 are welded from bottom to top; e. welding the fillet welds of the beam 107 and the base plate 101; welding is started after the assembly of one cabin is finished; then, the small longitudinal beams 104 pass through the cross beam 107 from one end, the bridge deck 106 is assembled and spliced according to the ground sample line and the reference line of the bridge deck 106, and the bridge deck 106 is sequentially positioned and assembled from the middle to two sides; bridge deck 106 transverse reference line: 100mm from the reference end; bridge deck 106 longitudinal reference line: the side line of the installation position of the transverse T rib 105 is welded with the fillet weld of the small longitudinal beam and the bridge deck, then the butt joint of the bridge deck is welded, finally the fillet weld of the bridge deck and the cross beam is welded, and the welding deformation is corrected;
3) assembling truss pieces: the upper tire positioning of the upper chord 202 and the lower chord 201 is carried out according to the upper tire positioning of the auxiliary line of the tire frame, the lower chord 201 is positioned firstly, and then the upper chord 202 is positioned; in the positioning of the lower chord 201, the small end node central system line is longitudinally positioned by taking the reference, the factory-preset camber value is transversely positioned, and the lower chord is rigidly fixed after the positioning; in the positioning of the upper chord 202, the small end node central system line is longitudinally used as a reference for positioning, the distance between the transverse direction and the system line of the lower chord is positioned according to the tolerance of +4mm, the welding shrinkage of the web member is reserved, and the web member is elastically fixed; then, the web members are assembled and spliced to form a straight web member 206, a long oblique web member 205 and a short oblique web member 204 in sequence; assembling the upper chord and the lower chord of the adjacent matching section into an upper chord and a lower chord pair of the adjacent matching section, and assembling the adjacent connectors according to a +20mm matching total; assembling the adjacent matching short diagonal web members 204, sequentially assembling the upper chord member, the lower chord member and the web members of the adjacent matching sections to the line, after the line is positioned, performing assembly overall line type adjustment to ensure the precision requirement, paying special attention to the inspection of the port, then performing welding, correcting the welding deformation and ensuring the port matching precision; correcting the system line after the correction inspection is qualified; matching, butting and splicing plates by taking group holes at two ends of adjacent rod pieces as templates; matching, butting and splicing plates by taking the upper chord member 202 gusset plate and the inhaul cable anchor box 203 group holes as templates, and drilling a positioning hole; according to the corrected system line, splicing the line groups and leveling the joint members;
4) the beam sections are vertically spliced: aligning and positioning the bridge deck system block 1, finely adjusting the elevation of a bottom plate of the bridge deck by adopting a cushion plate landing pad arranged on a buttress to meet the requirement, and enabling the reference line of the bridge deck to be consistent with the longitudinal and transverse reference lines of the auxiliary line of the jig frame; then, assembling the main truss pieces 2 and the bridge deck system block 1, adjusting the axis, the verticality and the elevation of the main truss, matching and adjusting the beam joint plates and the bridge deck sectional beams, accurately positioning, and adding temporary support to prevent the truss pieces from toppling; secondly, performing horizontal and transverse connection assembly, accurately positioning a horizontal connection truss sheet 8 and an upper horizontal connection web member 9, and temporarily solidifying the horizontal connection truss sheet 8, wherein the positioning needs to ensure the elevation requirement of the horizontal connection truss sheet 8, the reference center line of the horizontal connection truss sheet 8 is matched with the reference center line of a beam section, the diagonal dimension between sheet bodies needs to be measured repeatedly after the adjacent horizontal connection truss sheets 8 are positioned, and then welding the sections to form an integral section and transporting the integral section to a bridge site for erection for assembly;
5) and (3) overall splicing of the bridge: installing the integral sections on a main jig frame 4 and an auxiliary jig frame 7 of the bridge, aligning and positioning the sections with another bridge deck system block 1, then matching a main truss sheet 2 for splicing, then matching a transverse truss sheet 8 and an upper flat connecting web member 9 for splicing, and then welding, wherein the welding is delayed by one beam section compared with the splicing and positioning, the welding of the first beam section is carried out after the second beam section is spliced, and the welding of the next section can be started after all welding seams in one section are welded and inspected to be qualified until the splicing and welding of the last section are finished, so that the main body splicing of the bridge is finished;
6) assembling the rope: and a rope frame 3 is arranged on the main jig frame 4, a rope box 5 is arranged on the rope frame 3, and a rope 6 passes through the rope box 5 and two ends of the rope penetrate into the inhaul cable anchor boxes 203 corresponding to the positions in sequence to complete the whole assembly of the bridge.
As shown in fig. 1-6, the deck system block 1 includes a bottom plate 101, a plurality of longitudinal partition plates 102 are fixedly disposed on the top end of the bottom plate 101, transverse T-shaped ribs 105 are fixedly disposed on both lateral sides of the top end of the bottom plate 101, outer walls of the longitudinal partition plates 102 are respectively connected with first insertion holes formed in a plurality of cross beams 107 in an insertion manner, a plurality of longitudinal webs 103 are fixedly disposed between the cross beams 107, a plurality of second insertion holes are formed in a surface of each cross beam 107, a plurality of opposite second insertion holes are respectively connected with surfaces of corresponding small longitudinal beams 104 in an insertion manner, top ends of the longitudinal webs 103, the cross beams 107 and the small longitudinal beams 104 are respectively fixedly connected with surfaces of the bottom ends of the deck boards 106, a main truss 2 includes lower chords 201, straight web members 206 are fixedly disposed on both sides of the top ends of the lower chords 201, long diagonal web members 205 are fixedly disposed between the two straight web members 206, top ends of the two straight web members 206 are respectively fixedly connected with both sides of the bottom ends of the upper chords 202, the avris on lower chord 201 top and the avris of last chord 202 bottom all fix and are equipped with short diagonal web member 204, the both sides on upper chord 202 top are all fixed and are equipped with cable anchor case 203, two main purlin pieces are fixed between 2 and are equipped with two cross purlin pieces 8, per two cross purlin pieces 8 are fixed and are equipped with a plurality of flat web members 9 that ally oneself with, the bottom of main purlin piece 2 and one side fixed connection on 4 tops of main bed-jig, the middle part and the both sides of 1 bottom of bridge floor system block all with the top fixed connection who corresponds vice bed-jig 7, the fixed rope frame 3 that is equipped with of opposite side on 4 tops of main bed-jig, the top of rope frame 3 and the bottom fixed connection of rope case 5, the inside interlude of rope case 5 is equipped with a plurality of ropes 6, the both ends of every rope 6 are interlude respectively with the inside of cable anchor case 203 and are connected.
The working principle of the invention is as follows: arranging a corresponding number of main tire frames 4 and auxiliary tire frames 7 according to the whole bridge, wherein the main tire frames 4 are used for connecting the main truss pieces 2, the center and the slope changing point of the bridge deck system block 1 are used for connecting the auxiliary tire frames 7, the bridge deck system block 1 needs to be welded and assembled before use, and the tire assembly on the bottom plate 101 sequentially positions, inspects and welds the bottom plate according to the ground sample line of the tire frames; welding from the middle to the two sides in sequence, and welding the longitudinal bridge from the reference end to the non-reference end; marking out various structure positioning lines on the bottom plate 101; sequentially positioning and assembling the longitudinal web 103, the cross beam 107, the longitudinal partition plate 102 and the transverse T-shaped rib 105 from the center to the periphery according to a positioning line; welding outwards from the middle partition plate in sequence by adopting a double number of welders; the welding sequence for each compartment was: a. fillet welds of the middle longitudinal web 103 and the bottom plate 101 are welded; b. welding web fillet welds of the longitudinal partition plates 102 and the transverse T-shaped ribs 105, welding from bottom to top, and then welding corresponding wing plate butt welds; c. fillet welds of the longitudinal partition plates 102, the transverse T-shaped ribs 105 and the bottom plate 101 are welded; d. fillet welds of the longitudinal partition plates 102, the longitudinal web plates 103 and the cross beams 107 are welded from bottom to top; e. welding the fillet welds of the beam 107 and the base plate 101; welding is started after the assembly of one cabin is finished; then, the small longitudinal beams 104 pass through the cross beam 107 from one end, the bridge deck 106 is assembled and spliced according to the ground sample line and the reference line of the bridge deck 106, and the bridge deck 106 is sequentially positioned and assembled from the middle to two sides; bridge deck 106 transverse reference line: 100mm from the reference end; bridge deck 106 longitudinal reference line: the side line of the installation position of the transverse T rib 105 is welded with the fillet weld of the small longitudinal beam and the bridge deck, then the butt joint of the bridge deck is welded, finally the fillet weld of the bridge deck and the cross beam is welded, and the welding deformation is corrected; the upper tire positioning of the upper chord 202 and the lower chord 201 is carried out according to the upper tire positioning of the auxiliary line of the tire frame, the lower chord 201 is positioned firstly, and then the upper chord 202 is positioned; in the positioning of the lower chord 201, the small end node central system line is longitudinally positioned by taking the reference, the factory-preset camber value is transversely positioned, and the lower chord is rigidly fixed after the positioning; in the positioning of the upper chord 202, the small end node central system line is longitudinally used as a reference for positioning, the distance between the transverse direction and the system line of the lower chord is positioned according to the tolerance of +4mm, the welding shrinkage of the web member is reserved, and the web member is elastically fixed; then, the web members are assembled and spliced to form a straight web member 206, a long oblique web member 205 and a short oblique web member 204 in sequence; assembling the upper chord and the lower chord of the adjacent matching section into an upper chord and a lower chord pair of the adjacent matching section, and assembling the adjacent connectors according to a +20mm matching total; assembling the adjacent matching short diagonal web members 204, sequentially assembling the upper chord member, the lower chord member and the web members of the adjacent matching sections to the line, after the line is positioned, performing assembly overall line type adjustment to ensure the precision requirement, paying special attention to the inspection of the port, then performing welding, correcting the welding deformation and ensuring the port matching precision; correcting the system line after the correction inspection is qualified; matching, butting and splicing plates by taking group holes at two ends of adjacent rod pieces as templates; matching, butting and splicing plates by taking the upper chord member 202 gusset plate and the inhaul cable anchor box 203 group holes as templates, and drilling a positioning hole; according to the corrected system line, splicing the line groups and leveling the joint members; positioning the bridge deck system block 1 by aligning, finely adjusting the elevation of a bottom plate of the bridge deck by adopting a cushion plate landing pad arranged on a buttress to meet the requirement, and enabling the reference line of the bridge deck to be consistent with the longitudinal and transverse reference lines of the auxiliary line of the jig frame; then, assembling the main truss pieces 2 and the bridge deck system block 1, adjusting the axis, the verticality and the elevation of the main truss, matching and adjusting the beam joint plates and the bridge deck sectional beams, accurately positioning, and adding temporary support to prevent the truss pieces from toppling; secondly, performing horizontal and transverse connection assembly, accurately positioning a horizontal connection truss sheet 8 and an upper horizontal connection web member 9, and temporarily solidifying the horizontal connection truss sheet 8, wherein the positioning needs to ensure the elevation requirement of the horizontal connection truss sheet 8, the reference center line of the horizontal connection truss sheet 8 is matched with the reference center line of a beam section, the diagonal dimension between sheet bodies needs to be measured repeatedly after the adjacent horizontal connection truss sheets 8 are positioned, and then welding the sections to form an integral section and transporting the integral section to a bridge site for erection for assembly; installing the integral sections on a main jig frame 4 and an auxiliary jig frame 7 of the bridge, aligning and positioning the sections with another bridge deck system block 1, then matching a main truss sheet 2 for splicing, then matching a transverse truss sheet 8 and an upper flat connecting web member 9 for splicing, and then welding, wherein the welding is delayed by one beam section compared with the splicing and positioning, the welding of the first beam section is carried out after the second beam section is spliced, and the welding of the next section can be started after all welding seams in one section are welded and inspected to be qualified until the splicing and welding of the last section are finished, so that the main body splicing of the bridge is finished; and a rope frame 3 is arranged on the main jig frame 4, a rope box 5 is arranged on the rope frame 3, and a rope 6 passes through the rope box 5 and two ends of the rope penetrate into the inhaul cable anchor boxes 203 corresponding to the positions in sequence to complete the whole assembly of the bridge.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used by the invention can be purchased from the market, and the special-shaped parts can be customized according to the description and the description of the attached drawings.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a construction method of bridge with steel structure, the bridge with steel structure of grand bridge includes bridge deck system block (1), main truss (2), rope frame (3), main bed-jig (4), rope case (5), rope (6), vice bed-jig (7), cross-linked truss (8) and upper tie web member (9), bridge deck system block (1) includes bottom plate (101), longitudinal baffle (102), longitudinal web (103), minor longitudinal beam (104), horizontal T rib (105), decking (106) and crossbeam (107), main truss (2) include lower chord (201), upper chord (202), cable anchor case (203), short diagonal web member (204), long diagonal web member (205) and straight web member (206), its characterized in that, the construction method of bridge with steel structure:
1) the setting of bed-jig: the method comprises the following steps that a corresponding number of main tire frames (4) and auxiliary tire frames (7) are arranged according to the whole bridge, the main tire frames (4) are used for being connected with main truss pieces (2), the center and the slope changing point of a bridge deck system block body (1) are used for being connected with the auxiliary tire frames (7), three-dimensional general assembly of beam sections is completed on a large-scale positive assembly tire frame, the beam section vertical assembly tire frame is set to be a general positive assembly tire frame, the basic tire frame meets the general assembly requirements of different wheel numbers, each wheel number is manufactured and positioned according to the ground auxiliary line of the corresponding wheel number, the design of the tire frame needs to have universality, and buttress points meet the use requirements of all wheel numbers; the jig frame buttress has enough rigidity, enough bearing capacity and stability, and cannot sink, shift or deform; the size of the buttress of the total assembling jig frame is accurately measured, the plane position and the elevation of the buttress top are controlled by a measuring net, the whole section assembling jig frame is provided with a longitudinal slope, and the line type is strictly consistent with the line type of a formed bridge; the flatness of the top surface of the steel component on the jig frame buttress is less than 0.5 mm; longitudinal and transverse base lines and reference points are arranged on the jig frame, and auxiliary lines of the jig frame are arranged according to the drawing; monitoring measurement points are arranged on the jig frame, displacement, deformation, damage and buttress settlement of each part of the jig frame are monitored in the general assembling process, if the phenomenon occurs, the occurrence reason and monitoring data of the phenomenon need to be analyzed and researched immediately to determine whether to repair the jig frame and take effective remedial measures so as to ensure that the vertical assembling is not influenced; the jig frame is qualified in quality and safety requirements by a quality guarantee department and a project supervision, a quality record table is filled, and the jig frame is used after signature confirmation; after the whole segment of each round of tire discharging, the jig frame is adjusted again according to the linear data of the next round, and the jig frame can be used after being detected again and qualified, and detection records are made; in the process of the total assembly, a steel beam or other rigid components cannot collide with a jig frame, the jig frame cannot be cut randomly, the integrity of the jig frame needs to be kept, and meanwhile, when the jig frame is idle, the jig frame is protected;
2) preparing a bridge deck: the bridge deck system block (1) needs to be welded and assembled before use, and the upper tire assembly of the bottom plate (101) sequentially positions, inspects and welds the bottom plate according to a tire frame ground sample line; welding from the middle to the two sides in sequence, and welding the longitudinal bridge from the reference end to the non-reference end; marking out various structure positioning lines on the bottom plate (101); sequentially positioning and assembling the longitudinal web (103), the cross beam (107), the longitudinal partition plate (102) and the transverse T-shaped rib (105) from the center to the periphery according to a positioning line; welding outwards from the middle partition plate in sequence by adopting a double number of welders; the welding sequence for each compartment was: a. fillet welds of the middle longitudinal web (103) and the bottom plate (101) are welded; b. welding web fillet welds of the longitudinal partition plate (102) and the transverse T-shaped rib (105), welding from bottom to top, and then welding butt welds of corresponding wing plates; c. welding fillet welds of the longitudinal partition plates (102), the transverse T-shaped ribs (105) and the bottom plate (101); d. fillet welds of the longitudinal partition plates (102), the longitudinal web plates (103) and the cross beams (107) are welded from bottom to top; e. welding fillet welds of the cross beam (107) and the bottom plate (101), and starting welding after the assembly of one cabin is finished; then, the small longitudinal beam (104) passes through the cross beam (107) from one end, the bridge deck (106) is spliced according to the ground sample line and the datum line of the bridge deck (106), and the bridge deck (106) is sequentially positioned and spliced from the middle to two sides; bridge deck (106) transverse datum line: 100mm from the reference end; bridge deck (106) longitudinal reference line: the side line of the installation position of the transverse T-shaped rib (105) is welded with the fillet weld of the small longitudinal beam and the bridge deck, then the butt joint of the bridge deck is welded, finally the fillet weld of the bridge deck and the cross beam is welded, and the welding deformation is corrected;
3) assembling truss pieces: the upper tire positioning of the upper chord (202) and the lower chord (201) is carried out according to the upper tire positioning of the auxiliary line of the tire frame, the lower chord (201) is positioned firstly, and then the upper chord (202) is positioned; in the positioning of the lower chord (201), the longitudinal direction is positioned by taking a small end node central system line as a reference, the transverse direction is positioned by a factory-preset camber value, and the lower chord is rigidly fixed after the positioning; in the positioning of the upper chord (202), the longitudinal direction is positioned by taking a small end node central system line as a reference, the transverse direction is positioned according to the tolerance of +4mm with the system line distance of the lower chord, the welding shrinkage of the web member is reserved, and the web member is elastically fixed; then, the web members are assembled and spliced to form a straight web member (206), a long oblique web member (205) and a short oblique web member (204) in sequence; assembling the upper chord and the lower chord of the adjacent matching section into an upper chord and a lower chord pair of the adjacent matching section, and assembling the adjacent connectors according to a +20mm matching total; assembling adjacent matching short diagonal web members (204), sequentially assembling the upper chord member, the lower chord member and the web members of adjacent matching sections to the line, after the line is positioned, performing assembly overall line type adjustment to ensure the precision requirement, paying special attention to the inspection of the port, then performing welding, correcting the welding deformation and ensuring the matching precision of the port; correcting the system line after the correction inspection is qualified; matching, butting and splicing plates by taking group holes at two ends of adjacent rod pieces as templates; matching, butting and splicing plates by taking the node plates of the upper chord members (202) and the group holes of the inhaul cable anchor boxes (203) as templates, and drilling positioning holes; according to the corrected system line, splicing the line groups and leveling the joint members;
4) the beam sections are vertically spliced: aligning and positioning the bridge deck system block (1), finely adjusting the elevation of a bottom plate of the bridge deck by adopting a cushion plate landing pad arranged on a buttress to meet the requirement, and enabling the reference line of the bridge deck to be consistent with the longitudinal and transverse reference lines of the auxiliary line of the jig frame; then, assembling the main truss pieces (2) and the bridge deck system block body (1), adjusting the axis, the perpendicularity and the elevation of the main truss, matching and adjusting a cross beam joint plate and a bridge deck sectional cross beam, accurately positioning, and adding temporary support for preventing the truss pieces from toppling; secondly, performing horizontal and horizontal connection assembly, accurately positioning a horizontal connection truss sheet (8) and an upper horizontal connection web member (9), temporarily solidifying the horizontal connection truss sheet (8), positioning to ensure the elevation requirement of the horizontal connection truss sheet (8), matching the reference center line of the horizontal connection truss sheet (8) with the reference center line of a beam section, re-measuring the diagonal dimension between sheets after the adjacent horizontal connection truss sheets (8) are positioned, and then welding the sections to form an integral section and transporting the integral section to a bridge site for erection for assembly;
5) and (3) overall splicing of the bridge: the integral sections are arranged on a main jig frame (4) and an auxiliary jig frame (7) of the bridge, the sections and another bridge deck system block body (1) are aligned and positioned, then the main truss pieces (2) are matched for assembling, then the transverse truss pieces (8) and the upper flat web connecting rods (9) are matched for assembling, then welding is carried out, the welding is lagged by one beam section compared with the assembling and positioning, the welding of the first beam section is carried out after the second beam section is assembled, the welding of the next section can be started after all welding seams in one section are welded and inspected to be qualified, and the assembling and the welding of the main bridge body are finished until the assembling and the welding of the last section are finished;
6) assembling the rope: install rope frame (3) on main bed-jig (4), rope case (5) are installed in rope frame (3), pass rope case (5) with rope (6) and penetrate cable anchor case (203) that the position corresponds in proper order with both ends and accomplish the whole of bridge and assemble promptly.
2. The construction method of the steel structure bridge of the grand bridge according to claim 1, characterized in that, the deck system block (1) includes a bottom plate (101), a plurality of longitudinal partitions (102) are fixedly arranged on the top of the bottom plate (101), transverse T-shaped ribs (105) are fixedly arranged on both lateral sides of the top of the bottom plate (101), the outer walls of the longitudinal partitions (102) are respectively inserted and connected with first insertion holes formed on a plurality of cross beams (107), and a plurality of longitudinal webs (103) are fixedly arranged between the cross beams (107).
3. The construction method of the steel structure bridge of the grand bridge according to claim 2, characterized in that a plurality of second through holes are formed in the surface of each cross beam (107), a plurality of opposite second through holes are connected with the surface of the corresponding small longitudinal beam (104) in a penetrating manner, and the top ends of the longitudinal web (103), the cross beam (107) and the small longitudinal beam (104) are fixedly connected with the surface of the bottom end of the bridge deck (106).
4. The construction method of the steel structure bridge of the grand bridge according to claim 1, characterized in that, the main truss (2) includes a lower chord (201), both sides of the top end of the lower chord (201) are fixed with straight web members (206), a long oblique web member (205) is fixed between two straight web members (206), and the top ends of two straight web members (206) are respectively fixed with both sides of the bottom end of the upper chord (202).
5. The construction method of the steel structure bridge of the grand bridge according to claim 4, characterized in that short diagonal web members (204) are fixedly arranged on both sides of the top end of the lower chord member (201) and the bottom end of the upper chord member (202), and cable anchor boxes (203) are fixedly arranged on both sides of the top end of the upper chord member (202).
6. The construction method of the steel structure bridge of the grand bridge according to claim 1, characterized in that, two cross girder pieces (8) are fixedly arranged between two main girder pieces (2), and each two cross girder pieces (8) are fixedly provided with a plurality of upper flat web members (9).
7. The construction method of the steel structure bridge of the grand bridge according to claim 1, characterized in that, the bottom end of the main truss (2) is fixedly connected with one side of the top end of the main jig frame (4), the middle and both sides of the bottom end of the bridge deck system block (1) are fixedly connected with the top end of the corresponding auxiliary jig frame (7), the other side of the top end of the main jig frame (4) is fixedly provided with the rope frame (3), the top end of the rope frame (3) is fixedly connected with the bottom end of the rope box (5), the inside of the rope box (5) is provided with a plurality of ropes (6) in an inserted manner, and both ends of each rope (6) are respectively connected with the inside of the rope anchor box (203) in an inserted manner.
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| CN115041853B (en) * | 2022-06-20 | 2024-05-14 | 中铁宝桥（扬州）有限公司 | Method for manufacturing upper chord block with hollowed-out cross-section |
| CN114908678A (en) * | 2022-06-21 | 2022-08-16 | 中交一公局第二工程有限公司 | Steel truss girder bidirectional pre-assembly construction method |
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