CN113585105A

CN113585105A - Bridge cornice rapid construction steel structure platform

Info

Publication number: CN113585105A
Application number: CN202111008863.XA
Authority: CN
Inventors: 段积文; 刘孟路; 杨雷
Original assignee: Sinohydro Bureau 5 Co Ltd
Current assignee: Sinohydro Bureau 5 Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2021-11-02
Anticipated expiration: 2041-08-31
Also published as: CN113585105B

Abstract

The invention discloses a steel structure platform for rapid construction of a bridge cornice, which comprises a plurality of unit structures arranged side by side, wherein each unit structure comprises a cross beam bracket, a cross beam support, a vertical enclosing purlin and a safety guardrail; the beam support is connected with the beam support through a vertical sliding piece, a surrounding purlin main body of the vertical surrounding purlin is arranged on the beam support in a sliding mode, the beam support comprises a triangular support main body, the top edge of the support main body is anchored to the lower surface of a bridge deck flange plate through a pre-buried cone and a climbing cone, and a plurality of transverse through holes are formed in the vertical edge of the support main body. The cantilever support with the inclination capability is used, the support adjusting angle range is-22 degrees to 10 degrees, the cantilever support can be better suitable for bridges with different sizes, the cantilever support is provided with the vertical and horizontal integrated slide rails, the vertical and horizontal directions can be adjusted through the adjusting screws, the prefabricated structural parts can be recycled, the construction loss is effectively reduced, and the construction cost is favorably reduced.

Description

Bridge cornice rapid construction steel structure platform

Technical Field

The invention relates to the field of bridge engineering construction devices, in particular to a steel structure platform for rapid bridge cornice construction.

Background

With the development of economy and the progress of science and technology, the structural form of a steel structure bridge is more and more complex, the weight and the specification of a steel structure are changed, the span is increased, and the requirements on construction quality and welding quality are higher and higher; the welding, pouring, paint coating and the like of the cornice of the large-span steel structure bridge at the present stage are limited by the self design of the bridge and the field installation environment, so that the cornice of the bridge can be influenced to a certain extent in the welding, pouring and paint spraying processes.

The traditional bridge cornice welding, pouring, paint coating and the like adopt a full-hall support method or the cooperative matching of a hanging basket and an automobile crane, a constructor stands in the hanging basket, the hanging basket is lifted to the cornice position by the automobile crane, and then the constructor performs cornice welding and paint coating work in the hanging basket; or, a hanging basket is placed on the top face of the bridge, the hanging basket is suspended on the cornice side, construction workers stand in the hanging basket to perform construction operation, the full-hall support method is high in construction speed and applicability, but construction cost is high, and the hanging basket cannot be used for high pier stud bridge construction. The hanging basket construction method can be applied to high altitude, but the construction speed is slow, the bin dividing joints are more, the cost and the manufacturing cost of the hanging basket are high, and the hanging basket is uneconomical when used for cornice construction. The construction mode of cornicing all can't adapt to the demand of high pier stud bridge, consequently, needs one kind can set up fast, and low cost simultaneously can ensure constructor safety again be used for the construction platform of cornicing construction.

Disclosure of Invention

The invention aims to solve the technical problems that in the existing cornice construction mode, the cost of a full support method is high, the cornice construction mode cannot be applied to high pier column bridge construction, and the construction speed of a hanging basket construction method is low and the construction cost is high.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a steel structure platform for rapid bridge cornice construction comprises a plurality of unit structures arranged side by side, wherein each unit structure comprises a cross beam bracket, a cross beam support, a vertical enclosing purlin and a safety guardrail; the safety guardrail is vertically arranged at the tail end of the outer side of a horizontal cross beam of the cross beam support; the beam support comprises a triangular support main body, the top edge of the support main body is anchored to the lower surface of the flange plate of the bridge deck through a pre-embedded cone cylinder and a creeping cone, and a plurality of transverse through holes are further formed in the vertical edge of the support main body;

the vertical sliding piece comprises two first T-shaped plates which are arranged in parallel, and the two first T-shaped plates are fixedly connected at the vertical web plate through a transverse connecting web plate; a first hook groove is formed in one end of the upper surface of a transverse plate at the top of the first T-shaped plate, a second hook groove which is horizontally arranged is formed in the same end of the bottom of the first T-shaped plate, and the two first T-shaped plates are slidably clamped on the vertical edge of the support body and locked through a U-shaped locking piece and a transverse locking bolt; the vertical sliding piece also comprises a bearing sliding frame, and the bearing sliding frame is arranged on the vertical edge of the bracket main body through the transverse through hole and the bearing bolt and is tightly propped against the lower surface of the U-shaped locking piece; the butterfly pin is used for locking the bearing bolt;

a horizontal first hanging rod is arranged at the tail end of the inner side of the horizontal cross beam, the horizontal cross beam is hung in the first hook groove through the first hanging rod, a first spiral rotating rod is hinged to the lower surface of the middle of the horizontal cross beam, the other end of the first spiral rotating rod is clamped in the second hook groove through the second hanging rod, and supporting force is provided for the horizontal cross beam;

the vertical purlin comprises a U-shaped sliding groove which is arranged on the upper surface of the horizontal cross beam in a sliding mode, a clamping plate extends downwards from the side wall of one end of the U-shaped sliding groove, and the U-shaped sliding groove is connected with the horizontal cross beam through the clamping plate and a clamping bolt which transversely penetrates through the clamping plate; the purlin body is hinged with one end of the upper surface of the U-shaped sliding chute; the second spiral rotating rod is hinged with the other end of the upper surface of the U-shaped sliding chute and the middle part of the enclosing purlin main body;

the horizontal template and the vertical template of cornice are arranged between the purlin main body and the bridge deck flange plate.

Particularly, first spiral shell rotary rod and second spiral shell rotary rod all are equipped with horizontal second peg including the sill bar that has the hinge hole, the sill bar bottom, the sill bar top is connected with rotatory sleeve through the bearing rotatory sleeve top is equipped with the screw thread ejector pin of taking the hinge joint through the screw hole.

Furthermore, a rotating handle is arranged outside the rotating sleeve.

Particularly, a plurality of transverse positioning through holes are formed in the horizontal cross beam, and the clamping bolts penetrate through the clamping plate and the different positioning through holes to adjust the horizontal position of the U-shaped sliding groove.

Particularly, the safety barrier is provided with an L-shaped barrier mounting hook, and the barrier plate is clamped in the barrier mounting hook.

Particularly, the first hook groove and the second hook groove are both inverted T-shaped.

Particularly, the tail end of the horizontal cross beam is provided with a vertical plug bearing, and the bottom end of the safety guardrail is inserted into and penetrates through the vertical plug bearing.

Furthermore, the bottom end of the safety guardrail is provided with a transverse pin hole which is limited through a butterfly pin.

Particularly, the contact surface of the bearing sliding frame and the U-shaped locking piece is provided with a bearing top bolt, and the bearing top bolt abuts against the lower surface of the U-shaped locking piece.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the cantilever support with the tilting capability is innovatively used, the angle adjusting range of the support is-22-10 degrees, and the cantilever support can be better suitable for bridges with different forms and sizes.

2. The cantilever support is innovative and is applied to a vertical and horizontal integrated sliding rail, adjustment in the vertical and horizontal directions can be carried out through adjusting screws, and different forms of cornices are perfectly matched.

3. The cantilever support is made of high-strength galvanized steel, is light in weight but high in strength, is provided with a 1.3m safety guardrail, and is sufficiently guaranteed in high-altitude construction.

4. The high-altitude construction safety guardrail is formed by combining and splicing a plurality of prefabricated structural parts, is quick to install, is light in weight and high in strength due to the adoption of high-strength galvanized steel, is provided with the 1.3m safety guardrail, and is sufficient in guarantee of high-altitude construction safety.

5. All prefabricated structural parts except the embedded conical cylinder can be recycled, construction loss is effectively reduced, and construction cost is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention.

Fig. 2 is a schematic structural view of the first spiral rotating rod and the second spiral rotating rod.

Fig. 3 is a schematic view of a vertical sliding member structure.

Fig. 4 is a schematic structural view of the load-bearing sliding frame.

FIG. 5 is a schematic view of the U-shaped retaining member.

FIG. 6 is a schematic diagram showing the right side cross-sectional structure of the U-shaped locking member.

Fig. 7 is an enlarged schematic view of a portion a in fig. 1.

FIG. 8 is a diagram showing the relationship between the longitudinal distance of the embedded cone and the height and width of the cornice.

The explanation of each reference number in the figure is: a beam support-1; a holder main body-11; a transverse through-hole-12; a beam support-2; a first hanging bar-21; a horizontal cross-beam-22; a first helical rod-23; a bottom bar-231; a bearing-232; a rotating sleeve-233; a threaded mandrel-234; a second hanging rod-24; a positioning through hole-25; a vertical socket-plug-26; a vertical purlin-3; a U-shaped chute-31; a clamping plate-32; a clamping bolt-33; a second helical rod-34; a purlin body-35; a safety barrier-4; an L-shaped guardrail mounting hook-41; a first T-shaped plate-51; a vertical web-52; a connecting web-53; a second hook groove-54; a top transverse plate-55; a first hook groove-56; a U-shaped locking member-571; a transverse locking pin-572; load bearing roof bolts-573; a load-bearing slide frame-58; a load bearing pin-591; a butterfly pin-592; a transverse template-61; a vertical template-62.

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, so as to further understand the concept, the technical problems solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions.

As shown in fig. 1, the steel structure platform for rapid construction of the bridge cornice comprises a plurality of unit structures which are arranged side by side, wherein each unit structure comprises a beam bracket 1, a beam support 2, a vertical purlin 3 and a safety guardrail 4; the beam support 1 is connected with the beam support 2 through a vertical sliding piece, an enclosing purlin main body 35 of a vertical enclosing purlin 3 is slidably arranged on the beam support 2, and the safety guardrail 4 is vertically arranged at the tail end of the outer side of the horizontal beam 22 of the beam support 2; the beam support 1 comprises a triangular support main body 11, the top edge of the support main body 11 is anchored to the lower surface of a bridge deck flange plate through an embedded cone and an upward cone, and a plurality of transverse through holes 12 are formed in the vertical edge of the support main body 11; here, the top side is a short side above the triangular bracket body 11, and the vertical side is another short side near the horizontal cross member 22.

As shown in fig. 3, the vertical sliding piece comprises two first T-shaped plates 51 arranged in parallel, and the two first T-shaped plates 51 are fixedly connected at a vertical web 52 through a transverse connecting web 53; a first hook groove 56 is arranged at one end of the upper surface of a top transverse plate 55 of the first T-shaped plate 51, a second hook groove 54 which is horizontally arranged is arranged at the same end of the bottom of the first T-shaped plate 51, and the two first T-shaped plates 51 are slidably clamped on the vertical edge of the bracket main body 11 and locked by a U-shaped locking piece 571 and a transverse locking bolt 572; the vertical sliding member further includes a bearing sliding frame 58, the bearing sliding frame 58 is disposed on the vertical edge of the bracket body 11 through the transverse through hole 12 and the bearing bolt 591, and abuts against the lower surface of the U-shaped locking member 571, and further includes a butterfly pin 592 for locking the bearing bolt 591.

As shown in fig. 1 and 5, a horizontal first hanging rod 21 is disposed at the inner end of the horizontal beam 22, the horizontal beam 22 is hung in the first hook groove 56 through the first hanging rod 21, a first spiral rotating rod 23 is further hinged to the lower surface of the middle of the horizontal beam 22, and the other end of the first spiral rotating rod 23 is clamped in the second hook groove 54 through a second hanging rod 24 and provides a supporting force for the horizontal beam 22.

As shown in fig. 6, the vertical purlin 3 includes a U-shaped sliding chute 31 slidably disposed on the upper surface of the horizontal beam 22, a clamping plate 32 extends downward from a side wall of one end of the U-shaped sliding chute 31, and the U-shaped sliding chute 31 is connected with the horizontal beam 22 by the clamping plate 32 and a clamping bolt 33 transversely penetrating through the clamping plate 32; the enclosing purlin main body 35 is hinged with one end of the upper surface of the U-shaped sliding chute 31; and the second spiral rotating rod 34 is hinged with the other end of the upper surface of the U-shaped sliding chute 31 and the middle part of the enclosing purlin main body 35.

The horizontal template 61 and the vertical template 62 of cornice are arranged between the purlin body 35 and the bridge deck flange plate.

As shown in fig. 2, as a preferred embodiment, each of the first and

second screwing rods

23 and 34 includes a bottom rod 231 with a hinge hole, a second transverse hanging rod 24 is disposed at the bottom of the bottom rod 231, a rotating sleeve 233 is connected to the top of the bottom rod 231 through a bearing 232, and a threaded top rod 234 with a hinge joint is disposed at the top end of the rotating sleeve 233 through a threaded hole; the second hook groove 54 and the horizontal cross beam 22 on the vertical sliding piece are connected through the second hanging rod 24 on the first spiral rotating rod 23, and the enclosing purlin main body 35 and the U-shaped sliding groove 31 are connected through the second spiral rotating rod 34, so that the construction of two triangular support main bodies with adjustable angles is realized.

As a further embodiment, a rotating handle is provided outside the rotating sleeve 233, and the rotating sleeve 233 is rotated by the rotating handle, so that the threaded mandril 234 is screwed in or out of the rotating sleeve 233, thereby adjusting the inclination angle of the horizontal cross beam 22 and the purlin body 35.

In a preferred embodiment, the horizontal beam 22 is provided with a plurality of transverse positioning through holes 25, and the clamping bolt 33 penetrates through the clamping plate 32 and the different positioning through holes 25 to adjust the horizontal position of the U-shaped chute 31.

As a preferred embodiment, a plurality of L-shaped guardrail mounting hooks 41 are arranged on the safety guardrail 4, and the guardrail plate is clamped in the guardrail mounting hooks 41; the L-shaped guardrail mounting hook 41 at the bottom of the safety guardrail 4 bends downwards to form a baffle mounting space together with the horizontal cross beam 22 and the safety guardrail 4; the L-shaped guardrail mounting hook 41 above is bent towards the upper part and forms a mounting space of the baffle with the safety guardrail 4, so that the mounting position of the baffle can be conveniently and quickly positioned, and the quick mounting of the baffle can be completed.

As a preferred embodiment, the first hook groove 56 and the second hook groove 54 are both inverted T-shaped; the right side of the first hook groove 56 is sunken to be used as an installation position of the first hanging rod 21, the first hanging rod 21 on the horizontal cross beam 22 is limited in the first hook groove 56 of the first T-shaped plate 51, and the first spiral rotating rod 23 below the horizontal cross beam 22 is matched to be used as a bearing part of the horizontal cross beam 22, so that stable support can be provided for the whole device; the left side of the second hook groove 54 is sunken to be used as the mounting position of the second hanging rod 24, the second hanging rod 24 on the first spiral rotating rod 23 is clamped in the second hook groove 54, and the first T-shaped plate 51 provides bearing force for the first spiral rotating rod 23, so that the self load of the device is transmitted to the bracket main body 11, and stable support is provided for the device.

In a preferred embodiment, the horizontal beam 22 is provided with a vertical plug 26 at the end, and the bottom end of the safety barrier 4 is inserted into and passes through the vertical plug 26.

As a further embodiment, the bottom end of the safety barrier 4 is provided with a transverse pin hole, which is retained by a butterfly pin 592.

As shown in fig. 4, as a preferred embodiment, the contact surface of the bearing sliding frame 58 and the U-shaped retaining member 571 is provided with a bearing bolt 573, and the bearing bolt 573 abuts against the lower surface of the U-shaped retaining member 571; the bearing sliding frame 58 provides a supporting force for the upper vertical sliding piece through a bearing top bolt 573 and the U-shaped locking piece 571, and the load of the vertical sliding piece is transmitted to the bracket main body 11 through the bearing bolt 591, so that the load transmission is completed; in order to ensure the stress balance of the vertical sliding piece, an additional bearing bolt can be arranged below the top transverse plate 55 of the vertical sliding piece and is matched with the bearing top bolt 573 for bearing.

In the bridge deck flange plate pouring process, pre-embedded cone barrels are reserved on main reinforcements in advance, the distance between the pre-embedded positions of the cone barrels and the concrete edge is 25cm, the longitudinal distance is determined according to the height and the width of an cornice, the specific numerical value is determined as shown in fig. 8, wherein b represents the width of the cornice, h represents the vertical height of the cornice, and a represents the longitudinal distance of the cornice; and anchoring the climbing cone reverse ratchet wrench into the embedded cone, wherein the distance between the anchoring and the cone cap is about 23-25 mm. And then the beam support 1 is inserted into a gap between the concrete and the cone, the wedge is pushed in, and then the screw-in cone is screwed in, so that in order to ensure safety, the wedge is completely wedged by finally tapping the wedge with a hammer. The height of the vertical sliding part is adjusted according to the height of the cornice, the vertical sliding part is locked on the bracket main body 11 by the bearing sliding frame 58 and the bearing bolt 591, and the bearing bolt 591 is tightly pinned by the butterfly pin 592. The end part of the horizontal beam 22 of the beam support 2 is hung in a first hook groove 56 on a top transverse plate 55 of a first T-shaped plate 51 of the vertical sliding piece through a first hanging rod 21 which is transversely arranged, and is clamped and supported in a second hook groove 54 by utilizing a first spiral rotating rod 23, and the other end of the first spiral rotating rod 23 is hinged in a hinge seat on the lower surface of the horizontal beam 22; the horizontal beam 22 is adjusted to a design inclination angle by rotating the rotary sleeve 233 by rotating the knob, and screwing the threaded push rod 234 out of or into the rotary sleeve 233. The adjustment range of the horizontal beam 22 is-22 degrees to +10 degrees so as to adapt to various forms of cornices.

The U-shaped sliding groove 31 is placed on the horizontal cross beam 22 with the opening facing downwards, the position of the U-shaped sliding groove 31 is adjusted through the through hole in the clamping plate 32 and the positioning through hole 25 in the horizontal cross beam 22, the end portion of the U-shaped sliding groove is hinged to the purlin surrounding main body 35, the U-shaped sliding groove 31 and the purlin surrounding main body 35 form a vertical triangular support through the second spiral rotating rod 34, and the angle of the purlin surrounding main body 35 is adjusted through adjusting the length of the thread ejector rod 234 of the second spiral rotating rod 34. The adjusting range of the purlin body 35 is-15 degrees to +15 degrees.

The bottom of the safety rail 4 is then inserted through the vertical spigot 26 and the safety rail 4 is locked by the butterfly pin 592 using the vertical spigot 26 at the outboard end of the horizontal cross bar 22. A circle of limiting ring is arranged above the plug at the bottom of the safety guardrail 4 to limit the insertion length of the safety guardrail 4. And paving a scaffold springboard above the horizontal cross beam 22, transversely inserting a baffle plate into a space between the L-shaped guardrail mounting hook 41 on the safety guardrail 4 and the safety guardrail 4 to serve as safety protection to finish the construction of an integral steel structure, and erecting a transverse template 61 and a vertical template 62 in a space enclosed by the enclosing purlin main body 35 and the inner side horizontal cross beam 22 through plywood, square timber or I-shaped timber, thereby finishing the construction of the cornice template. The space between the vertical purlin 3 and the safety barrier 4 is used as a construction platform, so that technicians can maintain the template and can pour the template in a cornice mode.

After the concrete is poured, the formwork system can be dismantled after the strength of the concrete reaches the designed strength, and the dismantling principle is that the formwork system is firstly dismantled after being installed.

The device of the invention innovatively uses the horizontal cross beam 22 and the vertical purlin 3 with tilting capability, can better adapt to bridges with different forms of sizes, develops a rapid installation technology, the horizontal cross beam 22 and the vertical purlin 3 can be quickly installed in place by manpower without any tool in connection with pre-buried bolt holes, innovatively uses a vertical and horizontal integrated slide rail, can adjust the vertical and horizontal directions by the first spiral rotating rod 23 and the second spiral rotating rod 34, perfectly matches different forms of cornices, adopts various indication marks to mark the types and the installation direction of components, avoids a complicated accessory searching process during installation, adopts a novel anchoring technology, adopts a high-strength creeping cone single piece which can reach 30KN, adopts high-strength galvanized steel, has light weight but high strength, is provided with a 1.3m safety guardrail per se, and can sufficiently ensure high-altitude construction, can be applicable to the bridge construction of cornicing of various different grade types, its horizontal beam 22 that has the slope ability and vertical purlin 3 that encloses can adapt to different thickness, the bridge flange plate structure of angle, in addition the steel construction of different specification intensity supports, can be applicable to the construction of various corresponding important cantilever structures, it is extravagant at the material of setting up the in-process effectively to have practiced thrift hanging flower basket construction and full hall support construction, the circulation uses the reduction material loss, a large amount of time of setting up has been practiced thrift simultaneously, to accelerating the construction progress, it has extremely obvious effect to reduce construction cost.

The terms "connected" and "fixed" in the description of the present invention may be fixed, formed, welded, or mechanically connected, and the specific meaning of the above terms in the present invention is understood.

In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. are used in the orientation or positional relationship indicated only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element referred to must have a particular orientation and therefore should not be construed as limiting the present invention.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steel structure platform for rapid construction of bridge cornices comprises a plurality of unit structures arranged side by side, wherein each unit structure comprises a beam bracket (1), a beam support (2), a vertical enclosing purlin (3) and a safety guardrail (4); the safety guardrail device is characterized in that a cross beam support (1) is connected with a cross beam support (2) through a vertical sliding piece, an enclosing purlin main body (35) of a vertical enclosing purlin (3) is slidably arranged on the cross beam support (2), and a safety guardrail (4) is vertically arranged at the tail end of the outer side of a horizontal cross beam (22) of the cross beam support; the beam support (1) comprises a triangular support main body (11), the top edge of the support main body (11) is anchored to the lower surface of a flange plate of a bridge deck through an embedded cone and a climbing cone, and a plurality of transverse through holes (12) are further formed in the vertical edge of the support main body (11);

the vertical sliding piece comprises two first T-shaped plates (51) which are arranged in parallel, and the two first T-shaped plates (51) are fixedly connected at a vertical web (52) through a transverse connecting web (53); a first hook groove (56) is formed in one end of the upper surface of a top transverse plate (55) of each first T-shaped plate (51), a second hook groove (54) which is horizontally formed in the same end of the bottom of each first T-shaped plate (51) is formed in the same end of the bottom of each first T-shaped plate (51), and the two first T-shaped plates (51) are slidably clamped on the vertical edge of the support main body (11) and locked through a U-shaped locking piece (571) and a transverse locking bolt (572); the vertical sliding piece further comprises a bearing sliding frame (58), and the bearing sliding frame (58) is arranged on the vertical edge of the support main body (11) through the transverse through hole (12) and the bearing bolt (591) and is abutted against the lower surface of the U-shaped locking piece (571); also comprises a butterfly pin (592) for locking the bearing pin (591);

a horizontal first hanging rod (21) is arranged at the tail end of the inner side of the horizontal cross beam (22), the horizontal cross beam (22) is hung in the first hook groove (56) through the first hanging rod (21), a first spiral rotating rod (23) is hinged to the lower surface of the middle of the horizontal cross beam (22), the other end of the first spiral rotating rod (23) is clamped in the second hook groove (54) through a second hanging rod (24), and supporting force is provided for the horizontal cross beam (22);

the vertical purlin (3) comprises a U-shaped sliding groove (31) which is arranged on the upper surface of the horizontal cross beam (22) in a sliding mode, a clamping plate (32) extends downwards from the side wall of one end of the U-shaped sliding groove (31), and the U-shaped sliding groove (31) is connected with the horizontal cross beam (22) through the clamping plate (32) and a clamping bolt (33) which transversely penetrates through the clamping plate (32); the enclosing purlin main body (35) is hinged with one end of the upper surface of the U-shaped sliding chute (31); the other end of the upper surface of the U-shaped sliding chute (31) and the middle part of the enclosing purlin main body (35) are hinged through a second spiral rotating rod (34);

and the horizontal template (61) and the vertical template (62) of the cornice are arranged between the purlin surrounding main body (35) and the flange plate of the bridge deck.

2. The bridge cornice rapid construction steel structure platform as claimed in claim 1, wherein the first spiral rotating rod (23) and the second spiral rotating rod (34) both comprise a bottom rod (231) with a hinge hole, a transverse second hanging rod (24) is arranged at the bottom of the bottom rod (231), a rotating sleeve (233) is connected above the bottom rod (231) through a bearing (232), and a threaded top rod (234) with a hinge joint is arranged at the top end of the rotating sleeve (233) through a threaded hole.

3. The platform for rapid construction of cornice of bridge as claimed in claim 2, wherein a rotary handle is provided outside the rotary sleeve (233).

4. The bridge cornice rapid construction steel structure platform as claimed in claim 1, wherein a plurality of transverse positioning through holes (25) are arranged on the horizontal beam (22), and the clamping bolt (33) penetrates through the clamping plate (32) and different positioning through holes (25) to adjust the horizontal position of the U-shaped sliding groove (31).

5. The bridge cornice rapid construction steel structure platform according to claim 1, wherein the safety fence (4) is provided with an L-shaped fence mounting hook (41), and the fence plate is clamped in the fence mounting hook (41).

6. The bridge cornice rapid construction steel structure platform as claimed in claim 1, wherein the first hook groove (56) and the second hook groove (54) are inverted T-shaped.

7. The bridge cornice rapid construction steel structure platform as claimed in claim 1, wherein the end of the horizontal beam (22) is provided with a vertical spigot (26), and the bottom end of the safety barrier (4) is inserted into and passes through the vertical spigot (26).

8. The bridge cornice rapid construction steel structure platform as claimed in claim 7, characterized in that the bottom end of the safety fence (4) is provided with a transverse pin hole, and is limited by a butterfly pin (592).

9. The bridge cornice rapid construction steel structure platform as claimed in claim 1, wherein the contact surface of the bearing sliding frame (58) and the U-shaped locking member (571) is provided with a bearing top bolt (573), and the bearing top bolt (573) abuts against the lower surface of the U-shaped locking member (571).