CN110792038A

CN110792038A - Self-propelled mold hanging tool and method for high-altitude cast-in-place of tie rod arch bridge beam

Info

Publication number: CN110792038A
Application number: CN201911095530.8A
Authority: CN
Inventors: 崔凤坤; 薛洪运
Original assignee: Shandong Jiaotong University
Current assignee: Shandong Jiaotong University
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-02-14
Anticipated expiration: 2039-11-11
Also published as: CN110792038B

Abstract

The invention relates to a self-propelled mould hanging tool and a self-propelled mould hanging method for overhead cast-in-place of a tie rod arch bridge beam, wherein the self-propelled mould hanging tool comprises an upper truss, a bottom plate is arranged below the upper truss, the bottom plate is parallel to the bottom end surface of the upper truss, a working space is formed between the bottom plate and the upper truss, and the working space can allow two tie beams which are parallel to each other to pass through; go up truss and bottom plate and pass through main jib fixed connection, the relative position relation between main jib and the last truss is set up to: when the upper truss and the bottom plate move along the extension direction of the tie beams, the cross beam between the two tie beams cannot influence the movement of the main suspension rod; the lower end face of the upper truss is provided with a traveling device, the traveling device can be supported by the tie beam, and the traveling device can travel along the extension direction of the tie beam; the distance between the upper truss and the bottom plate can be adjusted through the main suspension rod so as to adjust the distance between the tie beam penetrating through the working space and the bottom plate in the vertical direction.

Description

Self-propelled mold hanging tool and method for high-altitude cast-in-place of tie rod arch bridge beam

Technical Field

The invention belongs to the technical field of civil construction, and particularly relates to a self-propelled mold hanging tool and a self-propelled mold hanging method for overhead cast-in-place of a tie rod arch bridge beam.

Background

In recent years, with the vigorous development of national economy and transportation industry in China, the tied arch bridge with excellent mechanical properties is widely applied to bridge engineering construction.

At present, a concrete beam of a tied arch bridge is usually constructed in a cast-in-place mode, and a large-area full support is used as a temporary support for construction. However, the tied arch bridge has a large number of cross beams, and the problems of large steel consumption, long construction period, high construction cost and the like exist in the construction of full framing. In addition, if the underbridge clearance of the tied arch bridge is required to be high, and the tied arch bridge spans rivers and roads with huge flow, the construction difficulty is high, the danger degree is high, and the support construction is difficult to implement.

In the self-propelled formwork hanging device for the cross beam in the patent document CN 107829368B-cast-in-place cross-navigation channel tied arch bridge, wanxiang et al provide a formwork hanging device for the construction of the cross beam of the tied arch bridge, which the inventor considers to have the following disadvantages:

1) the bottom plate is not arranged to support the pouring template, the bottom template of the pouring template is directly connected with the main hoisting module above through the hoisting rod, so that the middle cross beam bottom die hoisting rod and the bottom die are required to be completely dismantled when the hoisting device walks, and the bottom die is inconvenient to place after being dismantled.

2) The steel rail is arranged on the tie beam and used as a guide for the die lifting equipment to walk, the steel rail needs to be as long as the tie beam, and a large number of working procedures can be wasted by hoisting, installing and positioning and fixing the steel rail and the tie beam.

3) Change full hall support into and hang the mould equipment and pour the back, can't utilize maintenance water tank and water pipe to carry out the intelligent maintenance of concrete beam.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a self-propelled mould hanging tool and a self-propelled mould hanging method for high-altitude cast-in-place of tie rod arch bridge cross beams, which can finish the pouring of different cross beams in turn by a mode of walking along the tie beams; during moving, the placement of the removed template does not need to be considered; the steel rail does not need to be additionally laid, and the maintenance of the concrete beam after pouring can be realized.

In order to achieve the purpose, the invention adopts the following technical scheme: the self-propelled mold hanging tool for overhead casting of tie-rod arch bridge cross beams comprises an upper truss, a bottom plate is arranged below the upper truss, the bottom plate is parallel to the bottom end face of the upper truss, a working space is formed between the bottom plate and the upper truss, and the working space can allow two tie beams which are parallel to each other to pass through.

Go up truss and bottom plate and pass through main jib fixed connection, the relative position relation between main jib and the last truss is set up to: when the upper truss and the bottom plate move along the extension direction of the tie beams, the cross beam between the two tie beams cannot influence the movement of the main suspension rod.

The lower end face of the upper truss is provided with a traveling device, the traveling device can be supported by the tie beam, and the traveling device can travel along the extension direction of the tie beam;

the distance between the upper truss and the bottom plate can be adjusted through the main suspension rod so as to adjust the distance between the tie beam penetrating through the working space and the bottom plate in the vertical direction.

Further, go up and can dismantle between truss and the bottom plate and be connected with supplementary jib, the position of supplementary jib is set up to: when the tie beams penetrate through the working space, the auxiliary suspension rod is arranged between the two tie beams to increase the connection strength between the upper truss and the bottom plate.

Furthermore, running gear includes that two rows set up the walking wheel in last truss bottom, the direction of advance of walking wheel is the same with the extending direction of tie beam.

Further, running gear is including fixed two shells that set up in last truss bottom, the extending direction of shell is the same with running gear's direction of advance, and the side that two shells deviate from mutually rotates respectively and installs the walking wheel, and the distance between two sides that two shells deviate from mutually equals the distance between two tie beams.

Further, the distance between the lower end face of the shell and the lower end face of the upper truss is a first numerical value, the maximum distance between the outer circle side face of the walking wheel and the lower end face of the upper truss is a second numerical value, and the first numerical value is larger than the second numerical value, so that the shell provides guidance for the walking wheel to walk along the tie beam.

The water tank is supported by the upper truss, two rows of nozzles are respectively arranged on the upper surface of the bottom plate and the lower surface of the upper truss, and the nozzles are communicated with the water tank through pipelines.

Further, the jetting direction of the nozzle is set to: the water flow in the nozzle can be sprayed to the cross beam to be maintained in the working space.

The invention also provides a tie bar arch bridge beam high-altitude cast-in-place construction method, which utilizes the self-propelled mold hanging tool for high-altitude cast-in-place of the tie bar arch bridge and comprises the following steps:

step 1, installing an upper truss, and then installing a walking device on the lower end face of the upper truss;

step 2, hoisting the bottom plate to the position below the upper truss, and then fixing the bottom plate and the upper truss by using the main suspender, so that the tie beam is positioned in a working space formed between the bottom plate and the upper truss;

step 3, controlling the traveling device to move, wherein the traveling device drives the bottom plate and the upper truss to move to the position of a first cross beam to be poured;

step 4, adjusting the distance between the bottom plate and the upper truss to enable the bottom plate to be tightly attached to the bottom end face of the tie beam, and installing a template for beam pouring on the upper surface of the bottom plate to finish steel bar binding;

step 5, pouring concrete into the template, and removing the template when the requirement of removing the template is met;

step 6, maintaining the cross beam after removing the mold;

step 7, after the first beam is demoulded and maintained, pouring and maintaining the next beam; increasing the distance between the bottom plate and the upper truss so as to avoid the friction between the bottom plate and the tie beam when the bottom plate moves;

and (5) driving the bottom plate and the upper truss to move to the position of the next beam to be poured by the walking device, and repeating the steps from 4 to 6.

The invention has the beneficial effects that:

1) the bottom plate is arranged to support a pouring template, the main suspension rods are arranged at two ends of the upper truss, and the main suspension rods and the cross beams do not generate motion conflict, so that the upper truss is kept connected with the bottom plate in the moving process;

the mode that the distance between the upper truss and the bottom plate can be adjusted is adopted, so that when the die lifting tool integrally walks, the bottom plate cannot rub against the tie beam, the bottom plate is moved down by a set height, the detached die plate can be placed on the bottom plate, and the die plate cannot conflict with the cross beam in movement.

2) Two shells arranged at the bottom end of the main truss are adopted, the guiding of the travelling wheels is completed by utilizing the contact between the shells and the tie beams, when the guiding of the steel rail is avoided, the steel rail needs to be as long as the tie beams, and the conditions that a large number of processes are wasted due to the hoisting installation of the steel rail and the positioning and fixing between the steel rail and the tie beams are avoided.

3) After the full-framing support is changed into the formwork lifting equipment for pouring, the water tank and the water pipe can be maintained to maintain the concrete beam, and the pouring quality of the concrete beam is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is an isometric view of an overall structure in an embodiment of the invention;

FIG. 2 is a front view of the overall structure in an embodiment of the present invention;

FIG. 3 is a side view of an overall structure in an embodiment of the invention;

FIG. 4 is a schematic view of a beam cast-in-place formwork system according to an embodiment of the present invention;

FIG. 5 is a schematic illustration of a beam concrete maintenance system in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a walking system according to an embodiment of the present invention;

FIG. 7 is a schematic view showing the internal structure of the walking system in the embodiment of the present invention;

FIG. 8 is a schematic diagram of a controller in an embodiment of the invention;

FIG. 9 is a schematic view of a beam concrete curing process according to an embodiment of the present invention;

FIG. 10 is a schematic view of construction step 1 in an embodiment of the present invention;

FIG. 11 is a schematic view of construction step 2 in an embodiment of the present invention;

FIG. 12 is a schematic view of construction step 3 in an embodiment of the present invention;

FIG. 13 is a schematic view of construction step 4 in an embodiment of the present invention;

FIG. 14 is a schematic view of construction step 5 in an embodiment of the present invention;

FIG. 15 is a front view of a prior art bowtie arch bridge;

fig. 16 is a schematic view of view direction a-a in fig. 15.

In the figure: 1. a water tank; 2. a main boom; 3. screwing a nut; 4. an upper truss; 5. a chassis; 6. a booster pump; 7. a working platform; 8. a controller; 9. a nozzle; 10. a lower nut; 11. tying a beam; 12. a traveling device; 13. fixing the bolt; 14. an auxiliary boom; 15. a beam cast-in-place steel template; 16. a base plate; 17. a cross beam; 18. a water replenishing valve; 19. bracing the template; 20. a water delivery rubber hose; 21. a template connecting bolt; 22. a sideform; 23. a bottom template; 24. a tee joint; 25. a housing; 26. a traveling wheel; 27. a connecting shaft; 28. a motor; 29. a motor connecting shaft; 30. a driven gear; 31. a driving gear; 32. starting and stopping a booster pump button; 33. a traveling wheel advancing button; 34. a traveling wheel retreat button; 25. an arch rib; 36. a boom; 37. a cross beam; 38. and (4) tying a beam.

Detailed description of the preferred embodiment 1

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

For convenience of description, the words "up, down, left and right" when appearing in the present invention merely indicate correspondence with the up, down, left and right directions of the drawings themselves, and are not limiting of structure, but merely for convenience of description and simplified description, and do not indicate or imply that the referenced apparatus or component must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting of the present invention.

As shown in fig. 15 and 16, a typical tied arch bridge is composed of arch ribs 25, suspension rods 36, tie beams 38 and cross beams 37, and combines two basic structural forms of an arch and a beam, so that the mechanical characteristics and the structural performance of bending and arch compression of the beam are fully exerted. In addition, the tied arch bridge balances the horizontal thrust of the arch springing through the tie beam, reduces the requirement of the bridge foundation on the geological conditions, and further increases the application range of the arch bridge.

In order to solve the problems in the background art, a self-walking mold hanging tool vehicle suitable for overhead cast-in-place and maintenance of tied arch bridge beams is provided. The invention can automatically move to the designated position to cast different beams in situ at high altitude, and meanwhile, the invention is provided with a spray maintenance system which can freely walk on the tie beam to carry out spray maintenance on the poured concrete beam. The method can greatly reduce the influence of beam cast-in-place on the traffic under the bridge, improve the beam casting quality, shorten the construction period, reduce the construction cost, meet the requirements of energy conservation and environmental protection, and can generate good economic and social benefits in the tied arch bridge construction.

In an exemplary embodiment of the present invention, as shown in fig. 1 to 4, a concrete tied arch bridge having a span of 50m is constructed by a "beam first and arch second" method. The width of the cross section of the tie beam is 1400mm, the height of the tie beam is 1800mm, and two tie beams are already constructed. The height of the beam is 1600mm, the length is 6000mm, and the invention is adopted to carry out high-altitude cast-in-place and maintenance construction on all the beams.

The invention is further described with reference to the accompanying drawings and the specific operation steps.

As shown in the following figures 1-3, the formwork hanging and maintaining tool vehicle applied to the tied arch bridge beam in overhead cast-in-place comprises a formwork hanging system, a maintaining system and a traveling system. The mould hanging system comprises an upper truss 4, a main suspension rod 2, an upper nut 3, a case 5, a working platform 7, a controller 8, a lower nut 10, a walking device 12, a fixing bolt 13, an auxiliary suspension rod 14, a cross beam 17, a bottom plate 16, a side template 22, a bottom template 23, a template inclined strut 19 and a template connecting bolt 21; the maintenance system comprises a water tank 1, a booster pump 6, a water delivery rubber hose 20, a water replenishing valve 18, a nozzle 9 and a tee joint 24. The traveling system comprises a shell 25, traveling wheels 26, a connecting shaft 27, a motor 28, a motor connecting shaft 29, a driven gear 30 and a driving gear 31.

As shown in fig. 4, the formwork assembly is composed of four parts, namely a side formwork 22, a bottom formwork 23, formwork diagonal braces 19 and formwork connecting bolts 21. The formworks are standardized formworks for mass production, the formworks 22 on two sides are connected through formwork connecting bolts 21, and in order to prevent the formworks from collapsing when concrete is poured, formwork diagonal braces are additionally arranged between the side forms 22 and the bottom plate 16.

As shown in figure 5, the maintenance system is attached to the mould hanging system and comprises a water tank 1, a booster pump 6, a water delivery rubber hose 20, a water replenishing valve 18, a nozzle 9 and a tee joint 24. Through water delivery rubber hose 20 connection, install water supply valve 18 on one of them water tank 1, carry out water delivery work, gather into a water piping connection to booster pump 6 through tee bend 24, on another export of booster pump 6, connect water delivery rubber hose 20, and then supply nozzle 9 of two rows about the supply and carry out maintenance work, booster pump 6 is through welding directly fixed to work platform, on booster pump 6's power is connected to quick-witted case 5, quick-witted case 5 is connected with controller 8, and then control whole maintenance system's work.

As shown in fig. 6 and 7, describing the internal and external structures of the traveling system in detail, the traveling device 12 is composed of a traveling wheel 26, a connecting shaft 27, a motor 28, a motor connecting shaft 29, a driven gear 30, a driving gear 31 and a housing 25. The running gear 12 is located at the inner side edge of the tie beams 11 at two sides, and the shell 25 is directly welded with the lower edge of the upper truss 4, so that the occurrence of a slipping accident is avoided. The travelling wheel 26 is connected with the shell 25 through a travelling wheel bearing 27, the connecting shaft 27 is connected with a driven gear 30 in the shell 25, a driving gear 31 is connected with a motor 28 through a motor connecting shaft 29, and the travelling wheel 26 drives the driven gear 30 through the driving gear 31 so as to drive the travelling wheel 26 to move. The motors 28 of the walking wheels 26 controlled at two sides are connected with the power supply in the case 5 fixed at the upper truss, the case 5 is connected with the controller 8, so that the running condition of the walking device is controlled by the controller, namely the running of the mould hanging maintenance tool car for overhead cast-in-place of the tied arch bridge beam is controlled.

As shown in fig. 8, the controller 8 is connected with the case 5 through a wire, and comprises a start-stop booster pump button 32, a traveling wheel advancing button 33, a traveling wheel retreating button 34, three buttons distributed on the controller 8, a start-stop booster pump button 32 on the top, maintenance spraying operation of the maintenance device can be started by pressing once, and maintenance work can be stopped by pressing once again. The last two buttons respectively control the forward and backward movement of the travelling wheel 26, and the travelling wheel forward button 33 is started when pressed once and stopped when pressed again; the road wheel back button 34 is activated when pressed once and deactivated when pressed once again.

As shown in fig. 9, the beams 17 are cast and maintenance is initiated after the formwork system 15 is removed from the auxiliary hanger bars 14.

As shown in fig. 10, in the construction process of the embodiment, the whole device is mounted on the end of the tie beam, and the first cross beam construction is started.

As shown in fig. 11, in the construction steps of the embodiment, the cast-in-place steel formwork 15 for the beam and the formwork diagonal brace 19 are installed according to the specified requirements, and after the installation is completed, the first beam is poured.

As shown in fig. 12, in the construction steps of the embodiment, when the first beam meets the requirement of form removal, the cast-in-place steel formwork 15 of the beam is removed, the auxiliary boom 14 is removed, the upper nut 3 of the main boom 2 is adjusted to lower the bottom plate 16 by a proper distance, the traveling wheel forward button 33 and the traveling wheel backward button 34 on the controller 8 are started to adjust the whole device to the position of the second beam, and the second beam construction is started.

As shown in fig. 13, in the construction steps of the embodiment, the cast-in-place steel formwork 15 for the beam and the formwork diagonal brace 19 are installed according to the specified requirements, and after the installation is completed, the second beam is poured.

As shown in fig. 14, in the construction steps of the embodiment, when the pouring of the multiple beams is completed, the cast-in-place steel formwork 15 for the beams, the formwork diagonal bracing 19 and the auxiliary hanger rods 14 are removed, and the poured beams are subjected to spray maintenance by using the maintenance system.

step 1; and (4) installing a truss 4 on the mould hanging system. The main structure of the upper truss 4 consists of Bailey beams with the length and width of 3000 multiplied by 1500mm, the two rows of Bailey beams are connected through a support frame with the length and width of 1500 multiplied by 900mm in the transverse direction, and the Bailey beams are connected through pin holes in the longitudinal direction. During assembly, the upper truss 4 is used as an important part for bearing load, assembly construction must be carried out strictly according to the standard, and the working platform is fixed on the upper truss 4 through bolts for workers to operate the device.

Installing a traveling device of the mould hanging system: firstly, the outer shell 25 is welded on the lower edge of the upper truss 4, the distance between the outer edge of the outer shell 25 and the tie beam 11 is strictly controlled, then the motor connecting shaft 29 is connected to the motor 28 for controlling the travelling wheels 26, the travelling wheels 26 on the inner edges of the two tie beams are ensured to be in safe positions, and during construction of the tie beam 11, the flatness of the tie beam 11 is ensured, and the travelling faults of the travelling wheels 26 are avoided.

Installing a maintenance system: two water tanks 1 with the diameter of 1500mm and the height of 1000mm are respectively welded on the top of an upper truss 4 and are connected through a water delivery rubber hose 20, a water replenishing valve 18 is installed on one water tank 1 to carry out water delivery work, the water tanks are gathered into a water pipe through a tee joint 14 and are connected to a booster pump 6, the water delivery rubber hose 20 is connected to the other outlet of the booster pump 6 to further supply nozzles 9 in an upper row and a lower row for maintenance work, and the booster pump 6 is directly fixed on a working platform 7 through welding. The upper nozzle 9 is fixed to a steel back plate welded to the lower edge of the upper girder 4 by welding, and then fixed to the water-transfer rubber hoses 20, respectively. The lower nozzles 9 are respectively fixed to the corresponding positions of the lower base plates 16, and are respectively fixed to the water delivery rubber hoses 20. The upper layer nozzles 9 and the lower layer nozzles 9 are connected through water delivery rubber hoses 20, and the water delivery rubber hoses 20 are detachable and adjustable in length to adapt to changes in the distance between the upper truss 4 and the bottom plate 16. The output water pipe connected with the water tank 1 is pressurized by the booster pump 6, and then the water is discharged through the water output pipe, so that the purpose of maintenance is achieved. And finally, completing the circuit of the whole device according to the connection. Finally, the assembled part is hoisted to the tie beam 11 by using a crane, and the balance stability of the crane is ensured at the stage, so that the safety risk of overturning the crane is avoided.

And 2, installing a bottom plate of the mould hanging system and a hanging rod. The constructor fixes finish rolling screw-thread steel main suspender 2 and auxiliary suspender 14 with the length of 6m and the diameter of 32mm on the member hoisted on the tie beam 11 through an upper nut, and the suspenders are positioned inside double-spliced channel steel of an upper chord and a lower chord of the upper truss 4 so as to ensure the stability of the suspenders. A base plate 16 of a stainless steel plate 25mm thick with a bolt hole and 9200X 1600mm long and wide is hoisted under a corresponding boom by a crane and fixed by a lower nut 10.

Circuit connection: the required circuitry of the present invention includes both booster pumps 6 and motors 28 for controlling the road wheels 26, which are connected to the respective housings 5 secured to the ends of the upper truss 4, and are controlled by a controller 8 connected to the housings 5, as both are ac voltages.

Preparation work: whether inspection water tank 1 is filled with water, with whole device in addition the safety enclosure block net, further avoid falling of debris, place required crossbeam cast-in-place steel form 15 on bottom plate 16 to the preparation for use. And checking whether each system passes the safety qualified requirement or not, and eliminating potential safety hazards or not, and starting to operate after all systems are ready.

And 3, firstly, switching on a power supply, and moving the tool car to the position of the first beam by adjusting a traveling wheel forward button 33 and a traveling wheel backward control button 34.

And 4, adjusting the upper nuts 3 and the lower nuts 10 one by one according to the actual situation on site to adjust the elevation of the erected beam cast-in-situ steel template 15, and at the moment, detaching the water delivery rubber hose 20 for adjustment for convenient operation.

Binding steel bars: and (4) binding the beam steel bars according to design requirements, and when binding the steel bars, paying attention to the fact that the erected template cannot be collided, wherein the distance between the template and the template meets the standard requirement.

And 5, pouring concrete. After the cast-in-place steel form 15 of crossbeam was set up and is accomplished, carry out the pouring of concrete through the concrete conveyer pipe, the in-process of pouring fully vibrates according to the standard requirement, and certain attention is protected downside nozzle 9, should carry out the installation of protective housing to every downside nozzle 9 before pouring. And when the requirement of mold removal is met, the mold removal is carried out.

And 6, maintaining the beam. And (3) maintaining after removing the mold, pressing a button 32 for starting and stopping the booster pump, and maintaining, wherein in the maintenance process, a special person needs to take care of operation, and once any condition occurs, the power supply needs to be cut off firstly.

And 7, pouring the next beam. And after the first beam is poured and the form is removed, pouring and maintaining the next beam. Firstly, the worker removes the middle auxiliary boom 14, and lowers the bottom plate 16 by 15cm by adjusting the upper nut 3 of the main boom 2, thereby preventing the bottom plate 16 from rubbing against the bottom surface of the tie beam 11 when the present invention is moved. After the disassembly is completed, whether an obstacle preventing the tool car from advancing exists is checked again. And after the inspection is correct, switching on a power supply, moving the overhead cast-in-place hanging mold maintenance tool vehicle of the tied arch bridge beam to the position of a second middle beam by adjusting a traveling wheel forward button 33 and a traveling wheel backward button 34, and repeating the steps 4 to 6.

Maintaining all poured cross beams: concrete curing is continued for a period of time prescribed by the code. After pouring of each beam is completed according to the steps, the method can repeatedly carry out spray maintenance on all poured beams. The beam cast-in-place steel template 15 and the auxiliary hanger rod 14 on the tie rod arch bridge beam high-altitude cast-in-place hanging mold maintenance tool vehicle are dismounted, the bottom plate 16 is lowered by 15cm, and the tool vehicle can perform a special concrete beam maintenance procedure at the moment.

Disassembling the tool vehicle: after maintenance of all the beams is completed, the dismantling tool car is operated to first dismantle the safety barrier net and, with the aid of the crane, to remove the main boom 2 so that the floor 16 is lifted away by the crane. And then the rest components are unloaded at one time by a crane. And finally, checking whether the whole tie beam has a left member or not, and performing the next construction process of the tied arch bridge after the check is correct.

The self-propelled mould hanging tool for overhead casting of the tie rod arch bridge beam in the embodiment has the following advantages:

1) the operability is strong. The material is easy to obtain, especially the Bailey beam of the upper truss can be reused, the assembling mode is simpler, the manufacturing process is not complex, the specific operation process is simpler and more clear, and the simple buttons can operate the hanging mould maintenance tool car for overhead cast-in-place of the tied arch bridge beam.

2) The practicability is strong. At present, tied arch bridges are more and more at home and abroad, and beam pouring construction and maintenance are indispensable construction processes, so that the formwork hanging maintenance tool vehicle for overhead cast-in-place of tied arch bridge beams is very suitable for the current situation.

3) And (4) multi-functionalization. The formwork hanging maintenance tool trolley for overhead cast-in-place of the tied arch bridge beam can not only finish overhead and high-risk beam pouring, but also has the function of maintaining the poured beam, and fundamentally achieves the purpose of saving cost.

4) The high-altitude cast-in-place hanging mold maintenance tool trolley has the advantages that the cost performance is high, the whole tied arch bridge beam is cast in place in the high altitude, the input manpower and material resources are very easy to be accepted by construction units from the aspects of cost and technology, and the problem of high-altitude dangerous construction operation can be solved.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. The self-propelled mold hanging tool for overhead cast-in-place of the tie-rod arch bridge beam is characterized by comprising an upper truss, wherein a bottom plate is arranged below the upper truss, the bottom plate is parallel to the bottom end face of the upper truss, a working space is formed between the bottom plate and the upper truss, and the working space can allow two tie-beams which are parallel to each other to pass through;

go up truss and bottom plate and pass through main jib fixed connection, the relative position relation between main jib and the last truss is set up to: when the upper truss and the bottom plate move along the extension direction of the tie beams, the cross beam between the two tie beams cannot influence the movement of the main suspension rod;

2. The self-propelled formwork lifting tool for high-altitude cast-in-place of tie-rod arch bridge cross beams as claimed in claim 1, wherein an auxiliary boom is detachably connected between the upper truss and the bottom plate, and the auxiliary boom is arranged in a position that: when the tie beams penetrate through the working space, the auxiliary suspension rod is arranged between the two tie beams to increase the connection strength between the upper truss and the bottom plate.

3. The self-propelled formwork lifting tool for overhead cast-in-place of the tied arch bridge beam as claimed in claim 1, wherein the walking device comprises two rows of walking wheels arranged at the bottom of the upper truss, and the walking wheels advance in the same direction as the extension direction of the tie beam.

4. The self-propelled mold hanging tool for high-altitude cast-in-place of the tied arch bridge beam as claimed in claim 3, wherein the traveling device comprises two shells fixedly arranged at the bottom of the upper truss, the extending direction of the shells is the same as the advancing direction of the traveling device, traveling wheels are respectively rotatably arranged on the two sides of the two shells, which are far away from each other, and the distance between the two sides of the two shells, which are far away from each other, is equal to the distance between the two tie beams.

5. The self-propelled mold hanging tool for overhead cast-in-place of the tied arch bridge beam as claimed in claim 4, wherein the distance between the lower end face of the housing and the middle-lower end face of the upper truss is a first value, the maximum distance between the outer circumferential side face of the walking wheel and the lower end face of the upper truss is a second value, and the first value is larger than the second value, so that the housing provides guidance for the walking wheel to walk along the tie beam.

6. The self-propelled formwork hanging tool for high-altitude cast-in-place of tie-rod arch bridge beams as claimed in claim 1, further comprising a maintenance system, wherein the maintenance system comprises a water tank, the water tank is supported by an upper truss, two rows of nozzles are respectively arranged on the upper surface of the bottom plate and the lower surface of the upper truss, and the nozzles are communicated with the water tank through pipelines.

7. The self-propelled mold hanging tool for overhead cast-in-place of the tie-arch bridge beam according to claim 6, wherein the spraying direction of the nozzles is set as follows: the water flow in the nozzle can be sprayed to the cross beam to be maintained in the working space.

8. The self-propelled formwork lifting tool for overhead cast-in-place of a tied arch bridge beam according to claim 2, wherein the main boom and the auxiliary boom are perpendicular to a plane of the floor.

9. A tie rod arch bridge beam high-altitude cast-in-place construction method utilizes the self-propelled mould hanging tool for high-altitude cast-in-place of the tie rod arch bridge of any one of claims 1 to 7, and is characterized by comprising the following steps:

step 6, maintaining the cross beam after removing the mold;