CN110158483B - Cap beam prestressed high altitude tensioning operation cage - Google Patents
Cap beam prestressed high altitude tensioning operation cage Download PDFInfo
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- CN110158483B CN110158483B CN201910576973.2A CN201910576973A CN110158483B CN 110158483 B CN110158483 B CN 110158483B CN 201910576973 A CN201910576973 A CN 201910576973A CN 110158483 B CN110158483 B CN 110158483B
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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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Abstract
本发明提出了一种盖梁预应力高空张拉操作笼，包括：方形的本体，所述本体上部相对的两侧边上分别设置一行走轨道梁，两所述行走轨道梁沿水平方向相对平行设置，两所述行走轨道梁之间设置有一工作滑动梁，并沿所述行走轨道梁的设置方向平移；所述工作滑动梁上设置有工作滑动轮组；所述本体与所述行走轨道梁相平行的侧部设置有笼体挂环结构，用于将所述本体悬挂在盖梁的挡块上。本发明的盖梁预应力高空张拉操作笼，实现了高墩预应力盖梁的高空安全高效张拉施工，本盖梁预应力高空张拉操作笼安拆组装便捷，便于在交通困难的施工作业环境中快速周转；利用盖梁挡块自悬挂可以避免长时间占用起吊机具，降低施工成本。
The present invention proposes a prestressed cap beam high-altitude tensioning operation cage, comprising: a square body, a walking track beam is respectively arranged on the two opposite sides of the upper part of the body, the two walking track beams are arranged relatively parallel in the horizontal direction, a working sliding beam is arranged between the two walking track beams, and translates along the setting direction of the walking track beam; a working sliding wheel group is arranged on the working sliding beam; a cage body hanging ring structure is arranged on the side of the body parallel to the walking track beam, which is used to hang the body on the block of the cap beam. The prestressed cap beam high-altitude tensioning operation cage of the present invention realizes the high-altitude safe and efficient tensioning construction of high-pier prestressed cap beams. The prestressed cap beam high-altitude tensioning operation cage is easy to install, disassemble and assemble, and is convenient for rapid turnover in construction work environments with difficult transportation; the self-suspension of the cap beam block can avoid long-term occupation of lifting equipment and reduce construction costs.
Description
Technical Field
The invention relates to the technical field of high pier prestress cover beam high altitude prestress tensioning construction, in particular to a cover beam prestress high altitude tensioning operation cage.
Background
In the current road bridge construction field, environmental conditions of river crossing during construction are often faced, and many bridges can generate high-pier large-span prestress bent caps during design. The prestress bent cap structures are large in cantilever, and the effective distance from the ground can reach tens of meters or even hundreds of meters. In some special environments, high-altitude prestressed tensioning construction creates a number of difficulties in terms of safety, economic cost and convenience in construction. For example, due to the problem of construction height, a crane cannot directly extend to a construction working surface, and lifting measures such as a tower crane which can be effectively utilized are not suitable for long-time high-altitude tensioning construction in terms of cost and safety, and the construction working surface cannot be effectively fixed, so that the safety and construction quality of operators cannot be reliably ensured.
In the current construction field, high-altitude structures with prestress design are also quite common, and prestress tensioning operation of the bent cap is mostly concentrated on two ends of the bent cap. Therefore, the traditional high-altitude prestressed bent cap is tensioned, firstly, operators and tensioning equipment are placed in a hanging cage, and the hanging cage or the hanging basket is constructed on a lifting work surface by using a hoisting machine. The high-altitude tensioning in the prior art occupies large hoisting equipment for a long time, and because operators do not have stable and standard construction platforms, the high-altitude tensioning equipment with large weight needs to be frequently moved, the construction efficiency and the potential safety hazard are very prominent, the high-altitude tensioning device can have certain influence on the body and mind of the workers when being in a high-altitude environment for a long time on a limited working surface, the potential safety hazard can be gradually increased along with the time, meanwhile, the operation auxiliary facilities are prevented from being imperfect or lagged, and the construction efficiency and the construction quality are greatly reduced.
Disclosure of Invention
In view of the above, the invention provides a prestressed high-altitude tensioning operation cage for a bent cap, which aims to solve the problem that the existing operation cage cannot safely and efficiently complete the tensioning construction operation of the prestressed bent cap in a high-altitude environment.
The invention provides a capping beam prestress high-altitude stretching operation cage which comprises a square body, wherein two opposite side edges of the upper part of the body are respectively provided with a walking track beam, the two walking track beams are arranged in parallel in the horizontal direction, a working sliding beam is arranged between the two walking track beams, the working sliding beam is arranged in the direction perpendicular to the walking track beams and translates along the arrangement direction of the walking track beams, working sliding wheel sets are arranged on the working sliding beam and translate along the arrangement direction of the working sliding beam, and cage body hanging ring structures are arranged on the side parts of the body parallel to the walking track beams and used for hanging the body on a stop block of the capping beam.
The working sliding beam comprises two channel steel and two travelling wheels, the opening directions of the two channel steel are opposite, the working sliding wheel set is clamped between the two channel steel, two travelling wheels are respectively arranged at two ends of the channel steel, the travelling wheels are arranged along the direction perpendicular to the channel steel, and the travelling wheels are clamped in the travelling rail beam.
The working sliding beam further comprises an elongated wheel shaft and a wheel shaft fixing plate, wherein the wheel shaft fixing plate is arranged in the vertical direction, one side surface of the wheel shaft fixing plate is connected with the end parts of the two channel steels, the elongated wheel shaft is arranged in the horizontal direction, one end of the elongated wheel shaft is connected with the other side surface of the wheel shaft fixing plate, and the other end of the elongated wheel shaft is connected with the travelling wheels.
Further, an operation platform hanging column is respectively arranged at the lower sides of two ends of each walking track beam, and the operation platform hanging columns are arranged along the vertical direction.
Further, the cage body link structure comprises a stress link and a link bearing stop lever, one side of the stress link is connected with the hanging column of the operation platform, the link bearing stop lever is connected with the other side of the stress link, and a preset interval is kept between the link bearing stop lever and the hanging column of the operation platform.
Further, the work sliding wheel group comprises a work sliding wheel, a hanging plate, a pin type wheel shaft and a pin type hanging bar, wherein the work sliding wheel is clamped between two channel steels, the two hanging plates are respectively arranged on two sides of the channel steels, the pin type wheel shaft penetrates through the work sliding wheel, two ends of the pin type wheel shaft are respectively connected with the upper portion of the hanging plate, two ends of the pin type hanging bar are respectively connected with the lower portion of the hanging plate, one channel steel is arranged between the pin type wheel shaft and the pin type hanging bar, and the pin type hanging bar is used for hanging a manual lifting device.
Further, the end parts of the same side of the two walking track beams are respectively connected through a track connecting beam.
Further, a plurality of bolt sleeves are uniformly arranged on the operation platform hanging columns, the two adjacent bolt sleeves on the operation platform hanging columns are connected through bolt type tie bars arranged in the horizontal direction, and the bolt type tie bars are arranged under the walking track beams.
Further, lifting lugs are respectively arranged at four corners of the upper part of the body.
Compared with the prior art, the high-altitude tensioning operation cage for the prestressed capping beams has the advantages that high-altitude safe and efficient tensioning construction of the prestressed capping beams for the high piers is achieved, the prestressed high-altitude tensioning operation cage for the capping beams is convenient to assemble and disassemble and is convenient to quickly turn over in a construction operation environment with traffic difficulties, lifting machines can be prevented from being occupied for a long time by using the capping beam stop blocks to hang, construction cost is reduced, a track beam system at the upper part of the operation cage can meet the sliding of a heavy jack in front and back and left and right directions, up and down movement can be achieved through the chain block, time and labor consumption of pure manual operation are reduced on a limited operation surface, construction efficiency is improved, a channel steel component is adopted for a main stress structure of the operation cage, mechanical car holes are used for connecting the components, the load of the cage body is met during high-altitude operation, small micro torsion generated under the action of an external force can be offset by utilizing the advantage of pin shaft penetration, the long-time twisting of a welded junction to generate a cracking hidden danger, and accordingly high-altitude construction safety is improved. The quality control and the quality requirement in the construction process are integrally met.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a perspective view of an operating cage according to an embodiment of the present invention;
FIG. 2 is a top view of an operational cage provided by an embodiment of the present invention;
FIG. 3 is a side view of an operational cage provided by an embodiment of the present invention;
FIG. 4 is a schematic view of a first cage installation provided in an embodiment of the present invention;
FIG. 5 is a schematic view of a second cage installation provided in an embodiment of the present invention;
FIG. 6 is a schematic diagram of the connection of a walking rail beam and a working slide beam provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a working sliding beam according to an embodiment of the present invention;
Fig. 8 is a schematic structural diagram of a working sliding wheel set according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of connection of walking track beams according to an embodiment of the present invention;
FIG. 10 is a schematic diagram illustrating connection between a force-bearing suspension loop and an operation platform suspension post according to an embodiment of the present invention;
FIG. 11 is a schematic view of the connection of the lower corners of the operating cage according to an embodiment of the present invention.
In the drawings, the parts corresponding to the reference numerals are named as a 1-working sliding beam, a 11-walking track beam, a 111-double-buckle track groove reinforcing plate, a 112-lifting lug, a 113-pin fixing plate and a 114-upper connecting pin shaft; the device comprises a 12-track connecting beam, 13-travelling wheels, 131-lengthened wheel shafts, 132-wheel shaft fixing plates, 14-working sliding wheel sets, 141-working sliding wheels, 142-hanging plates, 143-pin wheel shafts, 144-pin hanging bars, 145-manual lifting devices, 2-operation platform hanging columns, 21-hanging column upper connecting beams, 22-hanging column lower connecting beams, 23-crossed pair pull rods, 24-plug type tie rods, 25-plug sleeves, 26-horizontal tie rods, 3-platform stress beams, 31-scaffold plate limiting plates, 32-light steel scaffold plates, 33-bottom connecting pin shafts, 4-cage hanging ring structures, 41-stress hanging rings, 42-hanging ring bearing bars, 421-operation cage auxiliary hanging rings, 422-anti-slipping limiting plates, 43-local stiffening plates, 431-axillary angle anti-folding stiffening plates, 432-anti-pulling reinforcing plates, 433-channel steel anti-deformation plates, 6-covering beams and 7-stoppers.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1-10, the embodiment of the invention provides a capping beam prestress high-altitude stretching operation cage, which comprises a square body, wherein two opposite side edges of the upper part of the body are respectively provided with a walking track beam 11, two walking track beams 11 are oppositely arranged in parallel along the horizontal direction, a working sliding beam 1 is arranged between the two walking track beams 11, the working sliding beam 1 is arranged along the direction perpendicular to the walking track beams 11 and translates along the arrangement direction of the walking track beams 11, the working sliding beam 1 is provided with a working sliding wheel set 14, the working sliding wheel set 14 translates along the arrangement direction of the working sliding beam 1, and the side parts of the body parallel to the walking track beams are provided with cage body hanging ring structures for hanging the body on a stop block 7 of a capping beam 6.
Specifically, the working sliding beam 1 comprises two channel steel and two travelling wheels 13, the opening directions of the two channel steel are opposite, the working sliding wheel set 14 is clamped between the two channel steel, two ends of the channel steel are respectively provided with one travelling wheel 13, the travelling wheels 13 are arranged along the direction perpendicular to the channel steel, and the travelling wheels 13 are clamped in the travelling rail beam 11. Specifically, the two channel steels are arranged side by side along the vertical direction, the opening directions of the two channel steels are opposite, and a preset interval is kept between the two channel steels.
Specifically, the working sliding beam 1 further comprises an elongated wheel shaft 131 and a wheel shaft fixing plate 132, the wheel shaft fixing plate 132 is arranged in the vertical direction, one side surface of the wheel shaft fixing plate 132 is connected with the end parts of the two channel steels, the elongated wheel shaft 131 is arranged in the horizontal direction, one end of the elongated wheel shaft 131 is connected with the other side surface of the wheel shaft fixing plate 132, and the other end of the elongated wheel shaft is connected with the travelling wheel 13.
Specifically, an operation platform hanging column 2 is respectively arranged at the lower sides of two ends of each walking track beam 11, and the operation platform hanging columns 2 are arranged along the vertical direction.
Specifically, the cage hanging ring structure 4 comprises a stress hanging ring 41 and a hanging ring bearing stop lever 42, one side of the stress hanging ring 41 is connected with the hanging column 2 of the operation platform, the hanging ring bearing stop lever 42 is connected with the other side of the stress hanging ring 41, and a preset interval is kept between the hanging ring bearing stop lever 42 and the hanging column 2 of the operation platform.
Specifically, the working sliding wheel set 14 includes a working sliding wheel 141, a hanging plate 142, a pin-type wheel shaft 143 and a pin-type hanging bar 144, the working sliding wheel 141 is clamped between two channel steels, the two hanging plates 142 are respectively arranged at two sides of the channel steels, the pin-type wheel shaft 143 is penetrated through the working sliding wheel 141, two ends of the pin-type wheel shaft 143 are respectively connected with the upper part of the hanging plate 142, two ends of the pin-type hanging bar 144 are respectively connected with the lower part of the hanging plate 142, one channel steel is arranged between the pin-type wheel shaft 143 and the pin-type hanging bar 144, and the pin-type hanging bar 144 is used for hanging a manual hoisting device 145.
Specifically, the ends of the same side of the two walking rail beams 11 are respectively connected by a rail connecting beam 12. The lower sides of the two ends of the walking track beams 11 are respectively provided with an operation platform hanging column 2, and the operation platform hanging columns 2 are arranged along the vertical direction.
Specifically, a plurality of bolt sleeves 25 are uniformly arranged on the operation platform hanging columns 2, the two adjacent bolt sleeves 25 on the operation platform hanging columns 2 are connected through a bolt type tie rod 24 arranged in the horizontal direction, and the bolt type tie rod 24 is arranged under the walking track beam 11.
Specifically, lifting lugs 112 are respectively arranged at four corners of the upper part of the body.
In specific implementation, the capping beam prestress high-altitude tensioning operation cage comprises a working sliding beam 1, walking wheels 13 are fixed at two ends of the working sliding beam 1, and the walking wheels are connected with an axle fixing plate 132 through an lengthened axle 131. The working sliding beam 1 is composed of channel steel double buckles.
Specifically, the channel steel of the working sliding beam 1 is arranged in a buckling parallel manner, two ends of the channel steel are connected with the inner sides of the wheel shaft fixing plates 132, the net height of the double-buckling channel steel of the working sliding beam 1 is 1-2cm higher than the outer diameter of the working sliding wheel 141, butter is smeared in the channel, and smooth movement of the heavy sliding wheel in the working process is met. The travelling wheel 13 is a deep groove ball bearing, the bearings are arranged in parallel in double rows, a proper distance is reserved between the bearings, one end of the lengthened wheel shaft 131 penetrates through the axes of the two bearings to be fixed, a reinforced steel plate is vertically arranged at the other end of the lengthened wheel shaft 131 along the axes, the reinforced steel plate is fully welded with the wheel shaft fixing plate 132 and then is subjected to plug welding and fixed with the other end of the lengthened wheel shaft 131, the lengthened wheel shaft 131 is a solid steel rod, and the diameter of the lengthened wheel shaft 131 is determined according to actual stress calculation and the central aperture of the bearing. The bending resistance and shearing capacity of the end part of the wheel shaft can be enhanced through the functions of the walking wheel bearing reinforcing steel plate and the hole digging plug welding. The travelling wheel 13, the lengthened wheel shaft 131, the reinforced steel plate and the wheel shaft fixing plate 132 are symmetrically arranged at two ends of the working sliding beam 1.
Specifically, the double-buckle channel steel of the sliding beam 1 is provided with a working sliding wheel set 14 in the channel.
Specifically, in the working sliding wheel set 14, the working sliding wheel 141 is made of the same material and the same method as the travelling wheel 13, and is fixed through a pin-type wheel shaft 143, the pin-type wheel shaft 143 is made of a solid steel rod, and the diameter is determined according to actual stress calculation and the central aperture of the bearing. The pin-type wheel shafts 143 are provided with a limiting plate at each end beyond the width of the working slide beam 1 for controlling the effective clear distance between the two plates of the hanging plate 142. The upper ends of the hanging plates 142 are drilled and sleeved at the two ends of the pin-type wheel shafts 143, after the hanging plates 142 are installed in place, the pin-type wheel shafts 143 are sleeved with gaskets and are fixed in a limiting mode through pins, holes are formed in the centers of the lower ends of the hanging plates 142 at the two sides, and the pin-type hanging bars 144 penetrate through the holes, and the pin-type hanging bars 144 are the same as the pin-type wheel shafts 143.
Specifically, before the butt-buckling channel steel of the working sliding beam 1 is connected by using the axle fixing plates 132 at both ends, the working sliding wheels 141 need to be placed in the buckling grooves, and the two ends of the sliding beam are fixed after the clear distance between the upper channel steel and the lower channel steel of the sliding beam 1 is adjusted.
Specifically, the material model of the working sliding beam 1 is selected, and the specification model of the channel steel is determined according to the weight of the equipment for lifting the beam and the required working width of the operation surface, so that the danger that the sliding beam 1 is deformed in a down-bending manner and even the sliding wheel set 14 falls off when the working sliding wheel set 14 slides forwards and backwards under the condition of loading caused by unmatched length and stress ratio of the sliding beam is avoided.
Specifically, a rail beam 11 for the left and right travel of the slide beam 1 is provided at each of both ends (i.e., front and rear ends) of the working slide beam 1. The front and rear walking rail beams 11 are made of the same manufacturing principle and material.
Specifically, the walking track beam 11 adopts double-buckling channel steel, the net height in the buckling groove is 1-2 cm higher than the outer diameter of the walking wheel 13, butter is smeared in the groove, and smooth movement of the walking wheel 13 in the working process is met.
Specifically, the double-buckle channel steel of the walking track beam 11 is used for solving the problem that the walking distance of the working slide beam 1 in the left-right direction is long, and the double-buckle track groove reinforcing plates 111 are uniformly arranged on the outer side surface of the working slide beam 1 at intervals of 30cm, so that the stability in the left-right walking process under the load action of the working slide beam 1 is met, the risk of too long track, down-warping deformation and even derailment of the working slide beam 1 are avoided. The upper and lower double-buckle channel steel is connected into a whole by utilizing the double-buckle track groove reinforcing plate 111, so that the track forms a space structure, and the stress stability is improved.
Specifically, the two traveling rail beams 11 are required to be arranged in an absolute parallel and horizontal manner, and the front and rear traveling rails are fixed by rail connecting beams 12 on the left and right sides of the rail beams.
Specifically, the rail connecting beams 12 are provided at upper portions of both left and right sides of the traveling rail beam 11, and are welded and fixed so that both rail beams are always kept parallel and horizontal.
Specifically, the working slide beam 1 and the traveling rail beam 11 are integrally formed into a rectangular frame type upper bidirectional rail beam system by the rail connecting beam 12. The integral stress stability and safety of the upper rail during working are further improved.
Specifically, both ends of the traveling rail beam 11 are connected to the upper ends of the operation platform hanging columns 2 by pins, respectively. Two ends of the walking track beam 11 are provided with pin fixing plates 113, mechanical holes are arranged on the pin fixing plates, and two pin jacks are uniformly distributed. The pin fixing plate 113 has the same size as the cross section of the walking rail 11, and is welded around the walking rail 11 and fixed to the end surfaces of the left and right walking rails.
Specifically, before the pin fixing plate 113 and the end surface of the traveling rail 11 are connected and fixed, the traveling wheels 13 at both ends of the working slide beam 1 are embedded into the fastening grooves of the traveling rail 11, and butter is applied and debugged.
Specifically, four lifting lugs 112 are symmetrically arranged at four corners of the upper bidirectional rail beam system of the rectangular frame type (i.e., both ends of the two left and right traveling rail beams). The lifting lug 112 is integrally cut and made of steel plates and is fixed for hanging when the integral operation cage is transported or installed and removed in a short distance.
Specifically, the operation platform hanging column 2 is made of channel steel, a pin connecting hole is formed in the upper end of the operation platform hanging column 2, and the operation platform hanging column 2 is connected with an upper track beam system through an upper connecting pin shaft 114.
Specifically, in order to ensure the stability, safety and reliability of the whole stress of the operation cage in operation, two connecting beams are respectively arranged on the left side and the right side of the operation cage along the longitudinal direction, and the front hanging column and the rear hanging column of the operation platform are connected and fixed to form a whole.
Specifically, the upper connecting beam 21 of the suspension column is positioned at the upper part of the single-side (left or right) operation platform suspension column 2 and is welded and fixed with the operation platform suspension column 2, and the lower connecting beam 22 of the suspension column is positioned at the lower part of the single-side (left or right) operation platform suspension column 2 and is welded and fixed with the operation platform suspension column 2. The upper connecting beam 21 and the lower connecting beam 22 of the hanging column are made of the same type, same material and same length material, and the parallelism of the hanging column 2 of the operation platform is ensured before fixing, so that the left side and the right side of the operation cage form a rectangular frame structure of the hanging column of the platform.
Specifically, in the rectangular frame structure of the platform hanging column formed on the left side and the right side of the operation cage, horizontal tie rods 26 are uniformly arranged along the vertical direction, the horizontal tie rods 26 and the operation platform hanging column 2 are subjected to perforation plug welding, meanwhile, the horizontal tie rods are used as side protection rails, seamless steel pipes with the outer diameter of 25mm are selected as materials, the intervals are reasonably arranged according to the height of the cage, but construction operation safety is considered, and the distance cannot exceed 50cm.
Specifically, in the rectangular frame structure of the platform hanging column formed on the left side and the right side of the operation cage, the cross pair of pull rods 23 are arranged at the upper and the lower opposite angles, so that the longitudinal torsion resistance and deformation resistance can be improved under the working stress state of the cage body in order to offset the torsion generated by the cage body under the load action, and the cross pair of pull rods 23 are movably connected with the bottom corners of the rectangular frame structure of the platform hanging column by the pair of pull rod connecting pin shafts 24. The cross-pair tie 23 is also made of a seamless steel pipe having an outer diameter of 25 mm. The fixed plate of the connecting pin shaft 24 of the pull rod is welded in the inner included angle between the hanging column 2 of the operation platform and the connecting beam 22 at the lower part of the hanging column.
Specifically, the cage body hanging ring structure 4 is a main force bearing structure of the whole operation cage, and needs to be effectively connected with adjacent structures (bent caps) so as to meet the fixation of the operation cage at high altitude. Therefore, the stress hanging ring 41 in the cage hanging ring structure 4 fully utilizes the stability of the rectangular frame structures of the hanging columns of the platforms at the left side and the right side of the operation cage, and is fixed with the rectangular frame structures of the hanging columns of the platforms at the left side and the right side of the operation cage into a whole.
Specifically, the stress hanging ring 41 is a stress member formed by bending hot rolled polished round steel bars with the diameter of 40mm into a round angle of 60 degrees.
Specifically, the stress hanging rings 41 are respectively and longitudinally arranged on the left side and the right side in a coaxial line with the rectangular frame structure of the hanging column of the platform, the upper horizontal ends of the single-side stress hanging rings 41 respectively penetrate through the front hanging column and the rear hanging column of the single-side operation platform and are fixed, and the lower inclined ends of the single-side stress hanging rings 41 respectively penetrate through the front hanging column and the front hanging column of the single-side operation platform and are fixed.
Specifically, the upper horizontal end and the lower inclined end of the stress hanging ring 41 are all provided with local stiffening plates 43 at each connecting point of the hanging column of the operation platform, so that the main stress points on the cage body are not deformed and bent under the condition that the cage body hanging ring structure 4 bears the load of the whole cage body. Thereby ensuring construction quality and operation safety.
Specifically, the local stiffening plate 43 is composed of a stiffening plate 433 for preventing channel steel deformation vertically arranged in the channel steel of the hanging column, an anti-pulling stiffening plate 432 arranged behind the channel steel of the hanging column along the coaxial direction of the stress hanging ring 41, and an axillary angle anti-folding stiffening plate 431 arranged in the direction of the perpendicular intersection angle of the hanging column and the hanging column in front of the channel steel of the hanging column.
Specifically, the force-bearing hanging ring 41 is connected with the fixing of the adjacent capping beam stop block through the hanging ring bearing stop lever 42.
Specifically, the hanging ring bearing stop rod 42 transversely and horizontally passes through the stress hanging rings 41 on the left side and the right side of the operation cage, and the operation cage is hung on the side surface of the capping beam stop block.
Specifically, set up the supplementary link 421 of operation cage on the link bearing pin 42 for in the work progress, adopt hoist and mount soft area cooperation snap ring, connect four lugs 112 on supplementary link 421 of operation cage and the operation cage from the top of bent cap, play the effect of similar schoolbag braces, supplementary safety and the stability of strengthening the operation cage body, improve high altitude stretch-draw operation safety control.
Specifically, the two ends of the hanging ring bearing stop lever 42 are respectively provided with an anti-slip limit plate 422, so that the hanging ring bearing stop lever is prevented from falling down due to shaking and sliding generated in the construction process, and serious potential safety hazards are generated.
Specifically, the lower extreme of operation platform string post 2 is provided with two platform atress roof beams 3. The two stress beams 3 are respectively connected with the bottom feet of the rectangular frame structure of the platform hanging column at the left side and the right side of the operation cage, and are parallel to each other.
Specifically, a light steel scaffold plate 32 is fully laid between the two stress beams 3, and two ends of the scaffold plate are lapped on the stress beams 3 of the operation platform.
Specifically, the scaffold board limiting plates 31 are arranged on the outer sides of the two stress beams 3, and the height of the scaffold board limiting plates is 2 times that of the steel scaffold board 32, so that the scaffold board limiting plates play a role of a foot blocking plate. The length of the lightweight steel scaffold plates 32 needs to be just embedded between the scaffold plate limiting plates.
Specifically, the end surfaces of the two stress beams 3 are provided with pin fixing plates, the size of each pin fixing plate is the same as the size of the section of the stress beam 3, the bottom connecting pin shafts 33 are arranged on the pin fixing plates, the bottom connecting pin shafts 33 penetrate through connecting holes at the lower ends of the hanging columns 2 of the operation platform, and gaskets are additionally arranged on the outer sides of the bottom connecting pin shafts 33 and are limited and fixed by pins.
Specifically, the stress beam 3 is connected with the operation platform hanging column 2, a light steel scaffold plate 32 is fully paved between the two stress beams, and a scaffold plate limiting plate 31 is arranged, so that the construction operation platform is finally formed.
Specifically, the latch type tie bars 24 are symmetrically and uniformly arranged transversely on the front and rear sides of the operation cage body and also serve as protective rails. The rod piece is made of a seamless steel pipe with the outer diameter of 25mm, two ends of the rod piece are mechanically and cold bent into a 90-degree hook, and bolt sleeves 25 are correspondingly arranged on hanging columns on the left side and the right side.
The construction method mainly relates to a construction load factor is fully considered and calculated by selecting all stressed beams and rods in a construction measure method of the prestressed high-altitude tensioning operation cage of the bent cap in the high-altitude tensioning operation, for example, in the early stage of implementation, 2 operators in the cage are comprehensively considered, the total weight is not more than 180kg, one tensioning jack is 180kg, the calculation result is formed by considering the factors such as dynamic load, material bending resistance and torsion resistance, and finally, materials are selected according to the calculation result, namely 50 channel steels are adopted as an operation platform hanging column 2 and a platform stressed beam 3, 60 channel steels are adopted as a sliding operation beam 1 and a walking track beam 11, seamless steel pipes with the outer diameter of 25mm are adopted as the rest of drawknot rods, a light steel scaffold plate is adopted as an operation platform bottom plate, and hot-rolled polished round steel bars with the diameter of 40mm are adopted as a stressed hanging ring 41. In the construction process, the equipment and operators selected in the operation cage need to be strictly matched with calculation, so that the self weight of the operation cage can be reduced to the greatest extent according to the requirements of the actual construction environment, the safety and stability of the stress hanging ring 41 and the whole operation cage are further improved, and the quick assembly, disassembly and turnover of the operation cage can be conveniently realized.
In the construction method of the capping beam prestress in the high-altitude environment, the upper bidirectional track beam system of the operation cage, the rectangular frame structures of the platform hanging columns on two sides, the platform stress beam, the steel light scaffold plates, the tie bars (protection railings) and other components are firstly transported to the site in construction, the cage body is assembled into the cage body by workers and then is sent to a construction working surface by a crane, and then the operation cage body is hung on a stop block of the capping beam by utilizing a hanging ring bearing stop lever 42. The operator enters an operation cage, a manual lifting device 145 (usually a chain block) is hung on a pin hanging rod 144, then a jack and other tensioning equipment are hung on the manual lifting device 145 (usually the chain block), the position of the sliding beam 1 is adjusted left and right through the walking track beam 11 according to the tensioning sequence required by design according to a plurality of bundles of prestress to be tensioned arranged on the side face of the capping beam, the working sliding wheel group 14 on the sliding beam 1 is utilized to move forwards and backwards, and meanwhile, the cooperation of the manual lifting device 145 (usually the chain block) is utilized to complete the tensioning construction of the prestress. In the construction process, in order to fully ensure the safety of the high altitude and the stability of the operation cage, after the cage body is hung in place, two ends of the canvas hoisting soft belt are respectively connected to the operation cage auxiliary hanging ring 421 and the four lifting lugs 112 by using clamping rings, and the canvas hoisting soft belt spans from the top of the bent cap and is similar to a schoolbag brace. After the construction is completed, the operation cage can directly utilize a crane or tower crane equipment nearby to complete the transfer, or can be hung on the ground, and can be disassembled by workers to realize the long-distance transfer.
According to the construction measure method for tensioning the bent cap prestress in the high-altitude environment, the constraint factors that under the high-altitude environment, a constructor does not have a safe and stable operation platform, jack equipment with large weight cannot move accurately, construction occupies hoisting equipment for a long time, time and labor are consumed for building a traditional high-altitude construction platform are effectively solved. The invention of the sliding beam and the sliding wheel set well realizes that a small number of workers can finish the flexible movement of the heavy jack in the effective space, and further realizes the requirements of cost reduction, synergy, safety and reliability of high-altitude prestress tensioning construction.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (1)
1. The prestress high-altitude stretching operation cage for the bent cap is characterized by comprising a square body, wherein two opposite side edges of the upper part of the body are respectively provided with a walking track beam, the two walking track beams are arranged in parallel along the horizontal direction, a working sliding beam is arranged between the two walking track beams, and the working sliding beam is arranged along the direction vertical to the walking track beams and translates along the arrangement direction of the walking track beams;
The working sliding beam is provided with a working sliding wheel set, and the working sliding wheel set translates along the setting direction of the working sliding beam;
the lateral parts of the body, which are parallel to the walking track beam, are provided with cage hanging ring structures for hanging the body on the stop blocks of the cover beam;
The working sliding beam comprises two channel steel and two travelling wheels, the opening directions of the two channel steel are oppositely arranged, and the working sliding wheel set is clamped between the two channel steel; the two ends of the channel steel are respectively provided with a travelling wheel, the travelling wheels are arranged along the direction vertical to the channel steel, and the travelling wheels are clamped in the travelling rail beams;
The working sliding beam further comprises an elongated wheel shaft and a wheel shaft fixing plate, wherein the wheel shaft fixing plate is arranged in the vertical direction, and one side surface of the wheel shaft fixing plate is connected with the end parts of the two channel steels;
An operation platform hanging column is respectively arranged at the lower sides of two ends of each walking track beam, and the operation platform hanging columns are arranged along the vertical direction;
The cage hanging ring structure comprises a stress hanging ring and a hanging ring bearing stop lever, one side of the stress hanging ring is connected with the hanging column of the operation platform, the hanging ring bearing stop lever is connected with the other side of the stress hanging ring, and a preset interval is kept between the hanging ring bearing stop lever and the hanging column of the operation platform;
the working sliding wheel set comprises a working sliding wheel, hanging plates, pin-type wheel shafts and pin-type hanging bars, wherein the working sliding wheel is clamped between two channel steel, the two hanging plates are respectively arranged on two sides of the channel steel, the pin-type wheel shafts are arranged on the working sliding wheel in a penetrating mode, two ends of the pin-type wheel shafts are respectively connected with the upper portions of the hanging plates, two ends of the pin-type hanging bars are respectively connected with the lower portions of the hanging plates, one channel steel is arranged between the pin-type wheel shafts and the pin-type hanging bars, and the pin-type hanging bars are used for hanging manual hoisting devices;
The end parts of the same side of the two walking track beams are respectively connected through a track connecting beam;
A plurality of bolt sleeves are uniformly arranged on the operation platform hanging columns, the bolt sleeves on two adjacent operation platform hanging columns are connected through a bolt type tie rod arranged in the horizontal direction, and the bolt type tie rod is arranged under the walking track beam;
And lifting lugs are respectively arranged at four corners of the upper part of the body.
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| CN201910576973.2A CN110158483B (en) | 2019-06-28 | 2019-06-28 | Cap beam prestressed high altitude tensioning operation cage |
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| CN110158483B true CN110158483B (en) | 2025-01-21 |
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| CN111335184A (en) * | 2020-04-27 | 2020-06-26 | 中铁四局集团第二工程有限公司 | A suspended self-locking prestressed tensioning platform and its prestressed tensioning and post-grouting operation method |
| CN111827135A (en) * | 2020-06-30 | 2020-10-27 | 鹤壁天宏钢结构有限公司 | A kind of auxiliary device for outside construction of movable bridge |
| CN116356723A (en) * | 2023-04-19 | 2023-06-30 | 德州市公路工程总公司 | Construction method of strengthening and repairing concrete cover beam with external prestress |
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|---|---|---|---|---|
| CN205205677U (en) * | 2015-11-26 | 2016-05-04 | 中交一公局第二工程有限公司 | Prefabricated beam slab stretch -draw work platform |
| CN207435903U (en) * | 2017-05-09 | 2018-06-01 | 中国十七冶集团有限公司 | A kind of working shed for prestressing force precast beam tensioning |
| CN210507152U (en) * | 2019-06-28 | 2020-05-12 | 中国二冶集团有限公司 | Cap beam prestress high-altitude tensioning operation cage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204589823U (en) * | 2015-04-30 | 2015-08-26 | 中交一公局第五工程有限公司 | For the tension operation platform of expressway construction Prestressed Slab Beams |
| CN207469093U (en) * | 2017-07-11 | 2018-06-08 | 中交第二航务工程局有限公司 | Bent cap stretching construction platform |
| CN208732480U (en) * | 2018-09-06 | 2019-04-12 | 中建筑港集团有限公司 | Prefabricated girder tensioning auxiliary hoisting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205205677U (en) * | 2015-11-26 | 2016-05-04 | 中交一公局第二工程有限公司 | Prefabricated beam slab stretch -draw work platform |
| CN207435903U (en) * | 2017-05-09 | 2018-06-01 | 中国十七冶集团有限公司 | A kind of working shed for prestressing force precast beam tensioning |
| CN210507152U (en) * | 2019-06-28 | 2020-05-12 | 中国二冶集团有限公司 | Cap beam prestress high-altitude tensioning operation cage |
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