CN109083007A - Steel truss bridge assembly support system and construction method - Google Patents

Steel truss bridge assembly support system and construction method Download PDF

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Publication number
CN109083007A
CN109083007A CN201810406201.XA CN201810406201A CN109083007A CN 109083007 A CN109083007 A CN 109083007A CN 201810406201 A CN201810406201 A CN 201810406201A CN 109083007 A CN109083007 A CN 109083007A
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steel
bar
positive side
chord
support system
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CN109083007B (en
Inventor
杜海峰
孙学军
彭申凯
任杰
刘要武
钱申春
崔健
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Anhui Construction Engineering Highway And Bridge Construction Group Co ltd
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Anhui Road and Bridge Engineering Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

本发明公开了钢桁架桥拼装支架体系及施工方法。所述钢桁架桥拼装支架体系包括底部门洞支架体系、桥梁上部拼接体系。底部门洞支架体系包括临时支墩、U型钢、贝雷架等；桥梁上部拼接体系由侧面下弦杆、端部工字钢、底部纵横向工字钢、异形连接板侧面斜腹杆、侧面竖腹杆、侧面上弦杆、连接在侧面下弦杆等。本发明在施工过程中，本发明采用对钢管桩下部位置进行混凝土整体浇注，以此作为临时支墩，可以满足钢桁架施工的荷载要求，对模板的需求量小，避免了满堂支架法因采用大量模板而导致的经济浪费；另外本发明的腹杆、上弦杆、下弦杆、底部纵横向工字钢等等构件均采用高强螺栓连接，施工速度更快，施工方便，且对受天气的影响小。

The invention discloses a steel truss bridge assembly support system and a construction method. The assembled support system of the steel truss bridge includes a bottom door opening support system and a bridge upper splicing system. The support system of the bottom door opening includes temporary buttresses, U-shaped steel, Bailey frame, etc.; the splicing system of the upper part of the bridge consists of side lower chords, end I-beams, bottom vertical and horizontal I-beams, side oblique web bars of special-shaped connecting plates, and side vertical webs. Rod, side top chord, connected to side bottom chord, etc. During the construction process of the present invention, the present invention adopts the integral pouring of concrete at the lower part of the steel pipe pile as a temporary support pier, which can meet the load requirements of the steel truss construction, has a small demand for formwork, and avoids the failure of the full support method. The economic waste caused by the use of a large number of templates; in addition, the web members, upper chords, lower chords, bottom vertical and horizontal I-beams and other components of the present invention are all connected by high-strength bolts, the construction speed is faster, the construction is convenient, and it is resistant to weather conditions. Small impact.

Description

Steel girder bridge assembling support system and construction method
Technical field
The present invention relates to construction engineering technical fields, in particular to steel girder bridge assembling support system and construction method.
Background technique
Steel girder bridge is a kind of a kind of structural system between beam and arch, it be by by curved top girder construction with hold The structure that the lower post of pressure is integrally joined together.Since truss bridge is compared with conventional concrete bridge, the design of structure is more To be simple, faster, bridge simple installation, truss adapts to the bigger advantage of span scope to the manufacturing speed of component, therefore in engineering It obtains very extensive.At present steel girder bridge in the construction process, using raft support method come erect bracket, and in this, as top The support of bridge.But the working rack template consumption of raft support method is big, long in time limit, has very to Bridges in Mountainous Areas and Gao Dun Big limitation；Secondly steel girder bridge, place the material on the dilatory slideway of one end, is then being constructed using dilatory method construction In the process, material is run along scheduled slideway route, is finally transported to and is formulated position.But dilatory method needs large-scale traction Mechanical equipment, and in heave, it is injury-free not can guarantee material, and potential hazard is caused to entire construction.In addition it passes The construction method of system needs to occupy a large amount of place, to be used to heap putting material and for being parked to transporting equipment, but it is traditional Construction method is limited place in narrow field or place and can not effectively construct.
Therefore, it needs to seek one kind at present can to construct on small place, and can be to avoid raft support method bring mould The steel truss assembling support system and construction method of plate consumption and disadvantage long in time limit seem particularly significant.
Summary of the invention
The object of the invention is to overcome drawbacks described above, a kind of steel truss assembling support system and construction method are provided.This The purpose of invention is achieved through the following technical solutions:
The steel girder bridge assembling support system, it is characterised in that including bottom door opening strutting system and bridge top spliceosome System；
The bottom door opening strutting system, including two groups of parallel temporary rest piers, cooperation is equipped with U-shaped at the top of each temporary rest pier Steel, lateral arrangement Bailey bracket forms rack beam in corresponding U-shaped steel in two groups, and Bailey bracket is equipped with backing plate at bottom, in every group Bridging is set between adjacent temporary rest pier, and temporary rest pier bottom is embedded to underground, and embedment region concrete grouting is closely knit, structure At concrete foundation；
System is spliced on the bridge top, including the rectangle bridge floor frame surrounded by two side lower booms and two radicle I-steel Frame, rectangle bridge floor frame are equipped with bridge floor, and side top boom is arranged in parallel in above the lower boom of side, and side top boom and side Staggeredly one group of abnormity connecting plate of interval setting, side diagonal web member and side erect web member and pass through special-shaped connecting plate setting on the lower boom of face Between side top boom and side lower boom, installation top diagonal web member and the elongated straight-bar in top, two sides on the top boom of side Face top boom end is connected by positive side top boom respectively, and the setting top parallel with positive side top boom is logical between the perpendicular web member in two sides Long straight-bar, positive side top boom lower section are arranged parallel positive side lower boom, positive side are equipped between positive side top boom and positive side lower boom Web member；Between the elongated straight-bar of positive side top boom and top, top diagonal web member is equipped between the elongated straight-bar of adjacent top.
The steel girder bridge assembling support system, it is characterised in that bridge floor is by bottom transverse direction I-steel and bottom longitudinal direction work Word steel is connected and composed by bolt and I-shaped steel fastener.
The steel girder bridge assembling support system, it is characterised in that side top boom and difference on the outside of the lower boom of side are equal The even special-shaped connecting plate of interval setting, and the special-shaped connecting plate of the special-shaped connecting plate of side top boom and side lower boom divides in interlocking Cloth, side diagonal web member both ends are fixed on special-shaped connecting plate adjacent on side top boom and side lower boom, and web member is erected in side One end connects special-shaped connecting plate, and the other end connects trapezoidal connecting plate, connects side by special-shaped connecting plate, trapezoidal connecting plate and winds up Bar and side lower boom.
The steel girder bridge assembling support system, it is characterised in that erect web member inside, the elongated straight-bar in top, positive side in side Several trapezoidal connecting plates, and the ladder on positive side top boom and positive side lower boom is arranged in uniform intervals on top boom, positive side lower boom Shape connecting plate position is staggered, and the elongated straight-bar in top is identical as the trapezoidal connecting plate position on positive side top boom, and top is elongated It is equipped with top diagonal web member between straight-bar and positive side top boom, positive side web member, position are equipped between positive side top boom and positive side lower boom It is connected on the top boom of side in outermost top diagonal web member, positive side web member end.
The steel girder bridge assembling support system, it is characterised in that web member, the oblique abdomen in side are erected in side top boom, side Bar, top diagonal web member, the elongated straight-bar in top, positive side top boom, positive side web member, positive side lower boom are I-steel, side lower edge Bar 9 is U-shaped steel.
The steel girder bridge assembling support system, it is characterised in that end cross I-shaped steel dimensions are greater than bottom longitudinal direction work Word steel dimensions, bottom longitudinal direction I-shaped steel dimensions are greater than bottom transverse direction I-steel size.
The steel girder bridge assembling support system, it is characterised in that the elongated straight-bar in top passes through bolt and rectangular connecting panels Riveting is fixed on the perpendicular web member in side and side top boom intersection, adjacent side are erected at the center of web member.
The construction method of the steel girder bridge assembling support system, it is characterised in that include the following steps:
1) temporary rest pier sets up temporary rest pier using steel-pipe pile, composition integrated poured to steel-pipe pile lower position progress concrete Concrete foundation pours completion to steel-pipe pile lower part, using U-shaped steel to banding is drawn, then arranges that Bailey bracket is formed in U-shaped steel Crossbeam, and backing plate at bottom is laid on crossbeam, bridging is set with channel steel between adjacent steel-pipe pile；
2) lower boom installation in two sides requires surveying and locating according to detail design, determines the position of side lower boom, and by side Lower boom is mounted on Bailey bracket top；
3) bottom transverse direction I-steel and bottom longitudinal direction I-steel are installed to side lower boom after the installation is completed, utilize bolt and I-shaped Two end cross I-steel are connected to the both ends of two sides lower boom by steel fastener, using assembling clamp by bottom longitudinal direction work Word steel is mounted on end cross I-steel, then bottom transverse direction I-steel is mounted on the I-steel of bottom longitudinal direction, forms bridge floor；
4) side diagonal web member, side erect web member, side top boom outside the venue first will side diagonal web member, side erect web member and side on Chord member is installed to obtain assembly, it is to be installed it is good after, assembly is hung to suitable position using crane, and using bolt with it is different Shape connecting plate 5 is riveted on the lower boom of side；
5) top diagonal web member, the elongated straight-bar in top are mounted on side and erect web member and side top boom intersection and the perpendicular abdomen of adjacent side At the center of bar, the elongated straight-bar of bolt and rectangular connecting panels riveting top is utilized；After after top, elongated straight-bar is installed, by top Diagonal web member is riveted on the elongated straight-bar in top and side top boom；
6) positive side top boom, positive side web member, positive side lower boom are mounted on the top that web member and side top boom intersection are erected in side Positive side lower boom is arranged in parallel immediately below elongated straight-bar, positive side lower boom both ends are fixed on side and erect on web member, then by positive flank Bar is inclined between positive side top boom and positive side lower boom, and positive side top boom is arranged in parallel in same with the elongated straight-bar in top In plane；
7) floorings construction and installation；
8) temporary rest pier and bottom door opening strutting system are removed.
The construction method of the steel girder bridge assembling support system, it is characterised in that the assembling clamp in step 3) includes Chassis, chassis middle part are equipped with slide slot, and the round bar of two rod failures cone is movably arranged on slide slot by bar cone, on every round bar Equipped with matched strap and ambulatory splint, wherein the ambulatory splint upper surface on a round bar is equipped with solid button, Ling Yigen Ambulatory splint upper surface on round bar is set there are two fixed ring, and motion bar is movably arranged between two fixed rings, on motion bar Equipped with fixed ring, fixed ring can match snapping with solid button, two ambulatory splints be fixed, it is convex that strap side is equipped with fixation Platform, ambulatory splint side are equipped with movable boss, and fixing lug boss and the overall length of movable boss are equal to strap length, two work It moves the width of boss and is matched with the upper surface width of bottom longitudinal direction to be installed I-steel.
The construction method of the steel girder bridge assembling support system, it is characterised in that the installation of bottom longitudinal direction I-steel Journey is as follows: successively chassis being placed on backing plate at bottom, two straps are placed on end cross I-steel corresponding position, bottom Portion longitudinal direction I-steel, which is placed on, needs position to be mounted, adjusts position of the round bar on slide slot, makes two straps the bottom of by Portion longitudinal direction I-steel clamps, then adjusts ambulatory splint, it is made to be close together with end cross I-steel, rotates motion bar, will Button hole is buckled on solid mouth；Using I-shaped steel fastener, bolt, bottom longitudinal direction I-steel is mounted on end cross I-steel On；Bottom transverse direction I-steel is mounted on the I-steel of bottom longitudinal direction using identical method.
By using above-mentioned technology, compared with prior art, beneficial effects of the present invention are as follows:
1) present invention is integrated poured using concrete is carried out to steel-pipe pile lower position, completely can be in this, as temporary rest pier Meet the load requirement of steel truss construction, and small to the demand of template, avoids raft support method because needing using a large amount of moulds Economic waste caused by plate；In addition the temporary rest pier construction period is shorter compared with raft support method；
2) vertically and horizontally I-steel etc. component is all made of high-strength bolt connection for web member of the invention, top boom, lower boom, bottom. Its opposite conventional method using welding, speed of application is faster, easy for construction, and small to being influenced by weather；
3) speed of application of the invention is fast, using over-the-counter prefabricated steel member, after element precast is good, then transport to construct now into Row splices between scene, solves the problems, such as the accumulation in place, and the large-scale traction without using in dilatory method to a certain extent Equipment.
Detailed description of the invention
Fig. 1 is the main view of steel girder bridge splicing support system；
Fig. 2 is the side view of steel girder bridge splicing support system；
Fig. 3 is the sectional view in Fig. 1；
Fig. 4 is the vertically and horizontally I-steel layout drawing on bridge floor；
Fig. 5 is bolt connection node schematic diagram in Fig. 1；
Fig. 6 is vertically and horizontally I-steel connection schematic diagram in Fig. 4；
Fig. 7 is assembling clamp schematic diagram；
Fig. 8 is that schematic diagram is completed in assembling clamp assembly.
In figure: 1-rectangular connecting panels；Erect web member in 2-sides；3-side top booms；4-bolts hole；5-abnormity connections Plate；6-side diagonal web members；7-bridgings；8-concrete foundations；9-side lower booms；10-bottom longitudinal direction I-steel； 11-bottom transverse direction I-steel；12-top diagonal web members；The elongated straight-bar in 13-tops；14-positive side top booms；15-positive flanks Bar；16-trapezoidal connecting plates；17-positive side lower booms；18-backing plate at bottom；19-temporary rest piers；20-I-shaped steel fasteners； 21-bolts；22-bridge floors；23-end cross I-steel；24-U-shaped steels；25-solid buttons；26-ambulatory splints；Gu 27- Clamp plate；28-fixed rings；29-motion bars；30-button holes；31-Bailey brackets；32-round bars；33-chassis；34-slide Slot；35-bars cone.
Specific embodiment
Below in conjunction with Figure of description, the invention will be further described, but protection scope of the present invention is not limited in This:
As shown in figures 1-8, steel girder bridge assembling support system of the invention, including bottom door opening strutting system and bridge top are spelled Junctor system；
The bottom door opening strutting system, including two groups of parallel temporary rest piers 19, cooperation is equipped with U at the top of each temporary rest pier 19 Fashioned iron 24, lateral arrangement Bailey bracket 31 forms rack beam in corresponding U-shaped steel 24 in two groups, and Bailey bracket 31 is equipped with bottom pad Bridging 7 is arranged in every group for plate 18 between adjacent temporary rest pier 19,19 bottom of temporary rest pier is embedded to underground, and is embedded to region and uses Concrete grouting is closely knit, constitutes concrete foundation 8；
System is spliced on the bridge top, including the rectangle bridge surrounded by two side lower booms 9 and two radicle I-steel 23 Surface frame frame, rectangle bridge floor frame are equipped with bridge floor 22, and bridge floor 22 is led to by bottom transverse direction I-steel 11 and bottom longitudinal direction I-steel 10 Bolt 21 is crossed to connect and compose with I-shaped steel fastener 20；Side top boom 3 is arranged in parallel in 9 top of side lower boom, and side Staggeredly one group of abnormity connecting plate 5 of interval setting, side diagonal web member 6 and side are erected web member 2 and are led on top boom 3 and side lower boom 9 It crosses special-shaped connecting plate 5 to be arranged between side top boom 3 and side lower boom 9, installation top diagonal web member 12 on side top boom 3 With the elongated straight-bar 13 in top, two 3 ends of side top boom are connected by positive side top boom 14 respectively, and two sides are erected between web member 2 The elongated straight-bar 13 in the top parallel with positive side top boom 14 is set, parallel positive side lower boom is set below positive side top boom 14 17, positive side web member 15 is equipped between positive side top boom 14 and positive side lower boom 17；Positive side top boom 14 and the elongated straight-bar 13 in top Between, between the elongated straight-bar 13 of adjacent top be equipped with top diagonal web member 12.
As shown in Figs. 1-5, the special-shaped connecting plate 5 of uniform intervals setting is distinguished on the outside of side top boom 3 and side lower boom 9, And the special-shaped connecting plate 5 of side top boom 3 and the special-shaped connecting plate 5 of side lower boom 9 are interspersed, 6 liang of side diagonal web member End is fixed on special-shaped connecting plate 5 adjacent on side top boom 3 and side lower boom 9, and 2 one end of web member connection abnormity is erected in side Connecting plate 5, the other end connect trapezoidal connecting plate 16, by special-shaped connecting plate 5, trapezoidal connecting plate 16 connect side top boom 3 with Side lower boom 9；Side erect 2 inside of web member, on the elongated straight-bar 13 in top, positive side top boom 14, positive side lower boom 17 uniformly between Every several trapezoidal connecting plates 16 of setting, and positive side top boom 14 is staggeredly set with 16 position of trapezoidal connecting plate on positive side lower boom 17 It sets, the elongated straight-bar 13 in top is identical as 16 position of trapezoidal connecting plate on positive side top boom 14, the elongated straight-bar 13 in top and positive side It is equipped with top diagonal web member 12 between top boom 14, positive side web member 15, position are equipped between positive side top boom 14 and positive side lower boom 17 It is connected on side top boom 3 in outermost top diagonal web member 12,15 end of positive side web member.
Web member 2, side diagonal web member 6, top diagonal web member 12, the elongated straight-bar in top are erected in side top boom 3 of the invention, side 13, positive side top boom 14, positive side web member 15, positive side lower boom 17 are I-steel, and side lower boom 9 is U-shaped steel；End cross 23 size of I-steel is greater than 10 size of bottom longitudinal direction I-steel, and I-steel 10 size in bottom longitudinal direction is greater than bottom transverse direction I-steel 11 Size；The elongated straight-bar 13 in top is fixed on the perpendicular web member 2 in side by bolt and the riveting of rectangular connecting panels 1 and hands over side top boom 3 At remittance, at the center of the perpendicular web member 2 of adjacent side.
As shown in Figure 7 and Figure 8, the assembling clamp includes chassis 33, is equipped with slide slot 34, two rod failures in the middle part of chassis 33 The round bar 32 of cone 35 is movably arranged on slide slot 34 by bar cone 35, and every round bar 32 is equipped with matched 27 He of strap Ambulatory splint 26, wherein 26 upper surface of ambulatory splint on a round bar 32 is equipped with solid button 25, the work on another round bar 32 Dynamic 26 upper surface of clamping plate sets that there are two fixed rings 28, and motion bar 29 is movably arranged between two fixed rings 28, on motion bar 29 Equipped with fixed ring 28, fixed ring 28 can match snapping with solid button 25, two ambulatory splints 26 are fixed, 27 side of strap Equipped with fixing lug boss 27a, 26 side of ambulatory splint is equipped with the overall length of activity boss 26a, fixing lug boss 27a and movable boss 26a Equal to 27 length of strap, the width of two movable boss 26a and the upper surface width with bottom longitudinal direction to be installed I-steel 10 Matching.
As shown, the construction method of the steel girder bridge assembling support system, includes the following steps:
1) temporary rest pier 19 sets up temporary rest pier 19 and uses steel-pipe pile, integrated poured to steel-pipe pile lower position progress concrete, Concrete foundation 8 is constituted, completion is poured to steel-pipe pile lower part, using 24 pairs of drawing bandings of U-shaped steel, is then arranged in U-shaped steel 24 Bailey bracket 31 forms crossbeam, and backing plate at bottom 18 is laid on crossbeam, and bridging 7 is arranged with channel steel between adjacent steel-pipe pile；
2) installation of two sides lower boom 9 requires surveying and locating according to detail design, determines the position of side lower boom 9, and by side Face lower boom 9 is mounted on 31 top of Bailey bracket；
3) bottom transverse direction I-steel 11 and bottom longitudinal direction I-steel 10 are installed to side lower boom 9 after the installation is completed, utilize bolt Two end cross I-steel 23 are connected to the both ends of two sides lower boom 9 with I-shaped steel fastener 20, utilize assembling clamp Bottom longitudinal direction I-steel 10 is mounted on end cross I-steel 23, the installation process of bottom longitudinal direction I-steel 10 is as follows: according to It is secondary chassis 33 is placed on backing plate at bottom 18, two straps 27 are placed on 23 corresponding position of end cross I-steel, bottom Portion longitudinal direction I-steel 10, which is placed on, needs position to be mounted, adjusts position of the round bar 32 on slide slot 34, makes two fixing clamps Plate 27 clamps bottom longitudinal direction I-steel 10, then adjusts ambulatory splint 26, it is made to be close together with end cross I-steel 23, Motion bar 29 is rotated, button hole 30 is buckled on solid mouth 25；Using I-shaped steel fastener 20, bolt 21, by bottom longitudinal direction I-shaped Steel 10 is mounted on end cross I-steel 23；Bottom transverse direction I-steel 11 is mounted on bottom longitudinal direction work using identical method On word steel 10, bridge floor 22 is formed；
4) side diagonal web member 6, side erect web member 2, side top boom 3 outside the venue first by side diagonal web member 6, side erect web member 2 with Side top boom 3 is installed to obtain assembly, it is to be installed it is good after, assembly is hung to suitable position using crane, and utilize Bolt and special-shaped connecting plate 5 are riveted on side lower boom 9；
5) top diagonal web member 12, the elongated straight-bar 13 in top are mounted on side and erect web member 2 and 3 intersection of side top boom and sides adjacent Face is erected at the center of web member 2, and the elongated straight-bar 13 of bolt and the riveting of rectangular connecting panels 1 top is utilized；Pacify to the elongated straight-bar 13 in top After installing, top diagonal web member 12 is riveted on the elongated straight-bar 13 in top and side top boom 3；
6) positive side top boom 14, positive side web member 15, positive side lower boom 17 are mounted on the perpendicular web member 2 in side and cross with side top boom 3 Positive side lower boom 17 is arranged in parallel immediately below the elongated straight-bar 13 in the top at place, 17 both ends of positive side lower boom are fixed on side and erect web member On 2, then positive side web member 15 is inclined between positive side top boom 14 and positive side lower boom 17, positive side top boom 14 and top Elongated straight-bar 13 is arranged in parallel in the same plane；
7) floorings construction and installation；
8) temporary rest pier 19 and bottom door opening strutting system are removed.
The above-mentioned specific embodiment technical solution that the invention is not limited in any way, it is all to use equivalent replacement or wait The mode technical solution obtained of effect transformation all falls within protection scope of the present invention.

Claims (10)

1.钢桁架桥拼装支架体系，其特征在于包括底部门洞支架体系和桥梁上部拼接体系；1. The steel truss bridge assembly support system is characterized in that it includes a bottom door opening support system and a bridge upper splicing system; 所述底部门洞支架体系，包括两组平行的临时支墩（19），每个临时支墩（19）顶部配合设有U型钢（24），两组中对应的U型钢（24）上横向布置贝雷架（31）形成支架横梁，贝雷架（31）上设有底部垫板（18），每组中相邻临时支墩（19）之间设置剪刀撑（7），临时支墩（19）底部埋入地下，且埋入区域用混凝土灌浆密实，构成混凝土基础（8）；The support system for the bottom doorway includes two sets of parallel temporary piers (19), each of which is equipped with U-shaped steels (24) on the top of the temporary piers (19), and the corresponding U-shaped steels (24) in the two groups are horizontally arranged The Bailey frame (31) forms the support crossbeam, and the Bailey frame (31) is provided with a bottom backing plate (18), and scissors supports (7) are set between adjacent temporary piers (19) in each group, and the temporary piers ( 19) The bottom is buried underground, and the buried area is compacted with concrete grouting to form a concrete foundation (8); 所述桥梁上部拼接体系，包括由两根侧面下弦杆（9）和两根端部工字钢（23）围成的矩形桥面框架，矩形桥面框架上设有桥面（22），侧面上弦杆（3）平行设置在侧面下弦杆（9）上方，且侧面上弦杆（3）和侧面下弦杆（9）上交错间隔设置一组异形连接板（5），侧面斜腹杆（6）和侧面竖腹杆（2）通过异形连接板（5）设置在侧面上弦杆（3）和侧面下弦杆（9）之间，侧面上弦杆（3）上安装顶部斜腹杆（12）和顶部通长直杆（13），两根侧面上弦杆（3）端部分别由正侧上弦杆（14）连接，两根侧面竖腹杆（2）间设置与正侧上弦杆（14）平行的顶部通长直杆（13），正侧上弦杆（14）下方设置平行的正侧下弦杆（17），正侧上弦杆（14）与正侧下弦杆（17）之间设有正侧腹杆（15）；正侧上弦杆（14）与顶部通长直杆（13）之间、相邻顶部通长直杆（13）之间设有顶部斜腹杆（12）。The bridge upper splicing system includes a rectangular bridge deck frame surrounded by two side lower chords (9) and two end I-beams (23). The bridge deck (22) is arranged on the rectangular deck frame, and the side The upper chord (3) is arranged in parallel above the side lower chord (9), and a set of special-shaped connecting plates (5) are arranged alternately on the side upper chord (3) and the side lower chord (9). and the side vertical web bar (2) are set between the side upper chord (3) and the side lower chord (9) through the special-shaped connecting plate (5), and the top diagonal web bar (12) and the top The straight rods (13) are long, the ends of the two side upper chords (3) are respectively connected by the positive side upper chords (14), and the two side vertical webs (2) are arranged parallel to the positive side upper chords (14). The top is full-length straight rod (13), the positive side lower chord (17) is arranged under the positive side upper chord (14), and the positive side belly is arranged between the positive side upper chord (14) and the positive side lower chord (17) Rods (15); top diagonal rods (12) are arranged between the upper chord rods (14) on the positive side and the top full-length straight rods (13), and between adjacent top full-length straight rods (13). 2.根据权利要求1所述的钢桁架桥拼装支架体系，其特征在于桥面（22）由底部横向工字钢（11）与底部纵向工字钢（10）通过螺栓（21）与工字钢连接件（20）连接构成。2. The steel truss bridge assembly support system according to claim 1, characterized in that the bridge deck (22) consists of bottom horizontal I-beams (11) and bottom longitudinal I-beams (10) through bolts (21) and I-beams Steel connectors (20) are connected to form. 3.根据权利要求1所述的钢桁架桥拼装支架体系，其特征在于侧面上弦杆（3）与侧面下弦杆（9）外侧分别均匀间隔设置异形连接板（5），且侧面上弦杆（3）的异形连接板（5）与侧面下弦杆（9）的异形连接板（5）呈交错分布，侧面斜腹杆（6）两端固定在侧面上弦杆（3）与侧面下弦杆（9）上相邻的异形连接板（5）上，侧面竖腹杆（2）一端连接异形连接板（5），另一端连接梯形连接板（16），通过异形连接板（5）、梯形连接板（16）连接侧面上弦杆（3）与侧面下弦杆（9）。3. The steel truss bridge assembly support system according to claim 1, characterized in that the side upper chords (3) and the side lower chords (9) are provided with special-shaped connecting plates (5) evenly spaced outside, and the side upper chords (3) ) and the special-shaped connecting plate (5) of the side lower chord (9) are distributed alternately, and the two ends of the side oblique web bar (6) are fixed on the side upper chord (3) and the side lower chord (9) On the adjacent special-shaped connecting plate (5), one end of the side vertical web bar (2) is connected to the special-shaped connecting plate (5), and the other end is connected to the trapezoidal connecting plate (16). Through the special-shaped connecting plate (5), the trapezoidal connecting plate ( 16) Connect the side upper chord (3) and the side lower chord (9). 4.根据权利要求1所述的钢桁架桥拼装支架体系，其特征在于侧面竖腹杆（2）内侧、顶部通长直杆（13）、正侧上弦杆（14）、正侧下弦杆（17）上均匀间隔设置若干梯形连接板（16），且正侧上弦杆（14）与正侧下弦杆（17）上的梯形连接板（16）位置交错设置，顶部通长直杆（13）与正侧上弦杆（14）上的梯形连接板（16）位置相同，顶部通长直杆（13）与正侧上弦杆（14）之间设有顶部斜腹杆（12），正侧上弦杆（14）与正侧下弦杆（17）之间设有正侧腹杆（15），位于最外侧的顶部斜腹杆（12）、正侧腹杆（15）端头分别连接在侧面上弦杆（3）上。4. The steel truss bridge assembly support system according to claim 1, characterized in that the inner side of the vertical web bar (2), the top straight bar (13), the upper chord of the front side (14), and the lower chord of the front side ( 17) Several trapezoidal connecting plates (16) are evenly spaced on the top, and the positions of the trapezoidal connecting plates (16) on the upper chord (14) on the positive side and the lower chord (17) on the positive side are arranged alternately, and the top is a long straight rod (13) The position of the trapezoidal connecting plate (16) on the upper chord (14) on the positive side is the same, and the top diagonal rod (12) is arranged between the top full-length straight rod (13) and the upper chord (14) on the positive side. There is a positive flank rod (15) between the rod (14) and the positive side lower chord rod (17), and the ends of the outermost top diagonal rod (12) and the positive flank rod (15) are respectively connected to the side upper chord on the rod (3). 5.根据权利要求1所述的钢桁架桥拼装支架体系，其特征在于侧面上弦杆（3）、侧面竖腹杆（2）、侧面斜腹杆（6）、顶部斜腹杆（12）、顶部通长直杆（13）、正侧上弦杆（14）、正侧腹杆（15）、正侧下弦杆（17）均为工字钢，侧面下弦杆9为U型钢。5. The steel truss bridge assembly support system according to claim 1, characterized in that the side upper chord (3), the side vertical web (2), the side oblique web (6), the top oblique web (12), The top full-length straight bar (13), the positive side upper chord (14), the positive side web bar (15), the positive side lower chord (17) are I-shaped steel, and the side lower chord 9 is U-shaped steel. 6.根据权利要求1所述的钢桁架桥拼装支架体系，其特征在于端部横向工字钢（23）尺寸大于底部纵向工字钢（10）尺寸，底部纵向工字钢（10）尺寸大于底部横向工字钢（11）尺寸。6. The steel truss bridge assembly support system according to claim 1, characterized in that the size of the end transverse I-beam (23) is larger than the size of the bottom longitudinal I-beam (10), and the size of the bottom longitudinal I-beam (10) is larger than Bottom transverse I-beam (11) size. 7.根据权利要求1所述的钢桁架桥拼装支架体系，其特征在于顶部通长直杆（13）通过螺栓与矩形连接板（1）铆接固定在侧面竖腹杆（2）与侧面上弦杆（3）交汇处、相邻侧面竖腹杆（2）的中心处。7. The steel truss bridge assembly support system according to claim 1, characterized in that the top straight bar (13) is riveted and fixed to the side vertical web bar (2) and the side upper chord bar through bolts and a rectangular connecting plate (1) (3) The intersection, the center of the vertical web bar (2) on the adjacent side. 8.一种基于权利要求1所述的钢桁架桥拼装支架体系的施工方法，其特征在于包括以下的步骤：8. A construction method based on the steel truss bridge assembly support system according to claim 1, characterized in that it comprises the following steps: 1）临时支墩（19）搭设 临时支墩（19）采用钢管桩，对钢管桩下部位置进行混凝土整体浇注，构成混凝土基础（8），待钢管桩下部浇筑完成，利用U型钢（24）对拉箍紧，然后在U型钢（24）上布置贝雷架（31）形成横梁，并在横梁上铺设底部垫板（18），相邻钢管桩之间用槽钢设置剪刀撑（7）；1) Temporary buttress (19) To erect the temporary buttress (19), steel pipe piles are used, and the lower part of the steel pipe pile is poured with concrete to form the concrete foundation (8). After the lower part of the steel pipe pile is poured, U-shaped steel ( 24) Tighten the hoops, then arrange the Bailey frame (31) on the U-shaped steel (24) to form a beam, and lay the bottom backing plate (18) on the beam, and set up scissors braces with channel steel between adjacent steel pipe piles (7); 2）两侧面下弦杆（9）安装 按照施工设计要求测量放样，确定侧面下弦杆（9）的位置，并将侧面下弦杆（9）安装在贝雷架（31）上部；2) Installation of the bottom chords (9) on both sides Measure and set out according to the construction design requirements, determine the position of the side bottom chords (9), and install the side bottom chords (9) on the upper part of the Bailey frame (31); 3）底部横向工字钢（11）和底部纵向工字钢（10）安装 待侧面下弦杆（9）安装完毕后，利用螺栓与工字钢连接件（20）将两个端部横向工字钢（23）连接在两侧面下弦杆（9）的两端，利用拼装夹具将底部纵向工字钢（10）安装在端部横向工字钢（23）上，再将底部横向工字钢（11）安装在底部纵向工字钢（10）上，形成桥面（22）；3) Install the bottom horizontal I-beam (11) and the bottom longitudinal I-beam (10). The steel (23) is connected to the two ends of the lower chords (9) on both sides, and the bottom longitudinal I-beam (10) is installed on the end transverse I-beam (23) by using the assembly fixture, and then the bottom horizontal I-beam ( 11) Installed on the bottom longitudinal I-beam (10) to form the bridge deck (22); 4）侧面斜腹杆（6）、侧面竖腹杆（2）、侧面上弦杆（3）在场外先将侧面斜腹杆（6）、侧面竖腹杆（2）与侧面上弦杆（3）进行安装得到组装件，待安装好后，利用吊车将组装件吊至合适位置，并利用螺栓与异形连接板5铆接在侧面下弦杆（9）上；4) Side oblique web bar (6), side vertical web bar (2), and side upper chord bar (3). After installation, the assembly is obtained. After installation, the assembly is hoisted to a suitable position by a crane, and the bolt and the special-shaped connecting plate 5 are riveted on the side lower chord (9); 5）顶部斜腹杆（12）、顶部通长直杆（13）安装 在侧面竖腹杆（2）与侧面上弦杆（3）交汇处及相邻侧面竖腹杆（2）的中心处，利用螺栓与矩形连接板（1）铆接顶部通长直杆（13）；待顶部通长直杆（13）安装好后，将顶部斜腹杆（12）铆接在顶部通长直杆（13）及侧面上弦杆（3）上；5) The top oblique web bar (12) and the top long straight bar (13) are installed at the intersection of the side vertical web bar (2) and the side upper chord bar (3) and at the center of the adjacent side vertical web bar (2), Use bolts and rectangular connecting plates (1) to rivet the top full-length straight bar (13); after the top full-length straight bar (13) is installed, rivet the top diagonal web bar (12) to the top full-length straight bar (13) and on the side upper chord (3); 6）正侧上弦杆（14）、正侧腹杆（15）、正侧下弦杆（17）安装在侧面竖腹杆（2）与侧面上弦杆（3）交汇处的顶部通长直杆（13）正下方平行设置正侧下弦杆（17），正侧下弦杆（17）两端固定在侧面竖腹杆（2）上，再将正侧腹杆（15）倾斜设置在正侧上弦杆（14）与正侧下弦杆（17）之间，正侧上弦杆（14）与顶部通长直杆（13）平行设置在同一平面上；6) The positive side upper chord (14), the positive side web (15), and the positive side lower chord (17) are installed on the top full-length straight rod ( 13) Set the positive side lower chord (17) in parallel directly below, fix the two ends of the positive side lower chord (17) on the side vertical web (2), and then set the positive side vertical web (15) obliquely on the positive side upper chord Between (14) and the lower chord (17) on the positive side, the upper chord (14) on the positive side is arranged on the same plane in parallel with the long straight rod (13) at the top; 7）桥面板施工安装；7) Bridge deck construction and installation; 8）拆除临时支墩（19）和底部门洞支架体系。8) Remove the temporary buttress (19) and the support system of the bottom door opening. 9.根据权利要求7所述的钢桁架桥拼装支架体系的施工方法，其特征在于步骤3）中的拼装夹具包括底盘（33），底盘（33）中部设有滑行槽（34），两根带杆锥（35）的圆杆（32）通过杆锥（35）活动设置在滑行槽（34）上，每根圆杆（32）上设有匹配的固定夹板（27）和活动夹板（26），其中一根圆杆（32）上的活动夹板（26）上表面设有实心扣（25），另一根圆杆（32）上的活动夹板（26）上表面设有两个固定环（28），活动杆（29）活动设置在两个固定环（28）之间，活动杆（29）上设有固定环（28），固定环（28）能与实心扣（25）匹配扣接，将两个活动夹板（26）固定，固定夹板（27）一侧设有固定凸台（27a），活动夹板（26）一侧设有活动凸台（26a）,固定凸台（27a）与活动凸台（26a）的总长等于固定夹板（27）长度，两个活动凸台（26a）的宽度和与待装底部纵向工字钢（10）的上表面宽度匹配。9. The construction method of the steel truss bridge assembly support system according to claim 7, characterized in that the assembly fixture in step 3) includes a chassis (33), and the middle part of the chassis (33) is provided with a sliding groove (34), two The round rod (32) with the rod cone (35) is movably arranged on the sliding groove (34) through the rod cone (35), and each round rod (32) is provided with a matching fixed splint (27) and movable splint (26 ), the upper surface of the movable splint (26) on one of the round rods (32) is provided with a solid buckle (25), and the upper surface of the movable splint (26) on the other round rod (32) is provided with two fixing rings (28), the movable rod (29) is movably arranged between two fixed rings (28), the movable rod (29) is provided with a fixed ring (28), and the fixed ring (28) can be matched with the solid buckle (25) Then, fix the two movable splints (26), one side of the fixed splint (27) is provided with a fixed boss (27a), one side of the movable splint (26) is provided with a movable boss (26a), and the fixed boss (27a) The total length of the movable boss (26a) is equal to the fixed splint (27) length, and the width of the two movable bosses (26a) matches with the width of the upper surface of the vertical I-beam (10) at the bottom to be installed. 10.根据权利要求9所述的钢桁架桥拼装支架体系的施工方法，其特征在于底部纵向工字钢（10）的安装过程如下：依次将底盘（33）放置在底部垫板（18）上、两个固定夹板（27）放在端部横向工字钢（23）相应位置处、底部纵向工字钢（10）放置在需要安装的位置，调节圆杆（32）在滑行槽（34）上的位置，使两个固定夹板（27）将底部纵向工字钢（10）夹紧，再调节活动夹板（26），使其与端部横向工字钢（23）紧贴在一起，转动活动杆（29），将扣孔（30）扣在实心口（25）上；利用工字钢连接件（20）、螺栓（21），将底部纵向工字钢（10）安装在端部横向工字钢（23）上；利用相同的方法将底部横向工字钢（11）安装在底部纵向工字钢（10）上。10. The construction method of the steel truss bridge assembly support system according to claim 9, characterized in that the installation process of the bottom longitudinal I-beam (10) is as follows: sequentially place the chassis (33) on the bottom backing plate (18) , Two fixed splints (27) are placed at the corresponding positions of the end horizontal I-beam (23), the bottom longitudinal I-beam (10) is placed at the position to be installed, and the adjustment round rod (32) is placed in the sliding groove (34) upper position, so that the two fixed splints (27) clamp the bottom longitudinal I-beam (10), and then adjust the movable splint (26) so that it is closely attached to the end horizontal I-beam (23), and rotate With the movable rod (29), buckle the buckle hole (30) on the solid mouth (25); use the I-beam connector (20) and the bolt (21) to install the bottom longitudinal I-beam (10) on the end transverse on the I-beam (23); utilize the same method to install the bottom horizontal I-beam (11) on the bottom longitudinal I-beam (10).
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