CN116201022A - Movable type cable support inner construction platform and construction method - Google Patents

Abstract

The invention discloses a construction platform and a construction method in a movable cable tower, wherein the construction platform comprises the following steps: the two ends of the mobile platform are telescopic structures and respectively supported at the tops of supporting seats pre-buried on the two tower walls; the plurality of groups of upright posts, any group of upright posts comprises two upright posts, and the two upright posts are arranged on two sides of the mobile platform; the tensioning beams are respectively arranged on a group of upright posts and are connected with the tops of the two corresponding upright posts; the tensioning device is arranged on the tensioning beam and is used for tensioning the stay cable; a lifting system disposed on the bridge tower and adapted to adjust the height position of the mobile platform. According to the invention, the length of the mobile platform is freely adjusted through the telescopic structures at the two ends, the height position of the mobile platform is freely adjusted through the lifting system, and the mobile platform can adapt to stay cable tensioning and other construction requirements at different positions in the whole height range of the bridge tower by matching with the traction device and the tensioning tool, so that the construction safety is improved, and meanwhile, the construction efficiency and quality are improved.

Description

Movable type cable support inner construction platform and construction method

Technical Field

The invention relates to the technical field of stay cable construction. More particularly, the invention relates to a mobile cable tower inner construction platform and a construction method.

Background

The cable-stayed bridge is popular in bridge type selection due to the characteristics of large span and attractive appearance, and is widely applied to large-span bridge construction such as river crossing and sea crossing. The stay cable is a structural system composition part and a main bearing part of the cable-stayed bridge, has the characteristics of large flexibility, small mass, small damping and the like, and along with the increase of the span and the service life of the bridge, the stay cable is easy to vibrate under the action of external environments such as wind, rain, earthquake and the like and loads such as traffic and the like, the durability of the bridge structure and components is easy to be greatly influenced by long-time large vibration, and even the stay cable needs to be replaced to meet the requirement of the safety performance of the bridge when the performance of the stay cable is seriously degraded, so the installation quality and the stability of the stay cable have critical influence on the stability and the durability of the whole bridge.

In the stay cable installation process, the tension construction of the cable-stayed tower end is an important construction procedure. Because no special tensioning construction platform is arranged in most cable-stayed bridge towers from the 90 th year of the 20 th century to the beginning of the 21 st century, meanwhile, different types of diseases exist in old bridge towers, such as: the concrete cracks, concrete defects, anchor rust, anchor oil leakage and the like have more operation contents to be carried out, and the construction is generally carried out by taking a simple steel pipe scaffold which is erected manually as a construction platform, so that the problems of complicated process, poor operability, high safety risk, low standardization degree and the like are solved.

In order to solve the problems, a mobile cable tower inner construction platform and a construction method are needed to be designed, and the construction efficiency and the construction quality are improved while the tension construction safety of the cable-stayed cable tower end is improved.

Disclosure of Invention

The invention aims to provide a construction platform and a construction method in a movable cable tower, free adjustment of the length of the movable platform is realized through a telescopic structure at two ends, free adjustment of the height position of the movable platform is realized through a lifting system, and the movable platform can adapt to stay cable tensioning and other construction requirements at different positions in the whole height range of a bridge tower by matching with a traction device and a tensioning tool, so that the construction safety is improved, and meanwhile, the construction efficiency and the construction quality are improved.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a mobile in-tower construction platform comprising:

the movable platform is arranged between two opposite tower walls along the length direction of the bridge tower, and two ends of the movable platform are of telescopic structures and are respectively supported at the tops of supporting seats pre-buried on the two tower walls;

the plurality of groups of upright posts are arranged at intervals along the length direction of the mobile platform, and any group of upright posts comprises two upright posts which are oppositely arranged at two sides of the mobile platform and are fixed at the top of the mobile platform;

two tensile beams which are respectively arranged on two groups of upright posts in the plurality of groups of upright posts, wherein any tensile beam is connected with the tops of the two corresponding upright posts;

the two tensioning devices are respectively arranged on the two tensioning beams, and any tensioning device comprises a tensioning tool which is arranged on the corresponding tensioning beam and used for tensioning the stay cable; the traction device is arranged between the tensioning tool and the tensioning beam and is used for adjusting the tensioning position and the tensioning direction of the tensioning tool;

a lifting system disposed on the bridge tower and adapted to adjust the height position of the mobile platform.

Preferably, the mobile in-tower construction platform, the mobile platform comprises a platform frame, which comprises:

the longitudinal beams are arranged at intervals along the width direction of the bridge tower, any longitudinal beam is arranged along the length direction of the bridge tower, and the bridge tower comprises a main body beam section which is of a hollow structure penetrating along the axial direction; the two telescopic beam sections are respectively sleeved at two ends of the main body beam section in an inner sleeve manner and slide along the length direction of the main body beam section under the drive of the power mechanism;

the cross beams are arranged at intervals along the length direction of the bridge tower, and any cross beam is fixedly connected with the main body beam sections of the longitudinal beams along the width direction of the bridge tower;

and two distributing beams which are arranged with the two telescopic beams Duan Duiying, wherein any distributing beam is connected with the outer ends of the telescopic beam sections positioned at the same end on the longitudinal beams and is supported on the corresponding supporting seat.

Preferably, the construction platform in the movable cable tower, the multiple groups of upright posts are in one-to-one correspondence with the multiple cross beams, and two upright posts of any group of upright posts are respectively fixed at two ends of the corresponding cross beams through supporting legs.

Preferably, the mobile cable tower inner construction platform further comprises a platform panel, wherein the platform panel is paved at the top of the platform frame, and the platform panel comprises a main panel, and the main panel is paved at the top of a frame structure consisting of the main body beam section and the corresponding cross beam; and the two telescopic panels are respectively arranged at two ends of the main panel and are in sliding connection with the main panel, and any telescopic panel is paved at the top of a frame structure formed by the distribution beam and the telescopic beam section at the same end.

Preferably, the construction platform in the mobile cable tower further comprises two groups of railings which are respectively arranged on the upright posts on two sides of the mobile platform, and any group of railings are connected with a plurality of upright posts on the same side along the length direction of the mobile platform.

Preferably, the construction platform in the movable cable tower, and the tension beam is detachably connected with the two corresponding upright posts.

Preferably, the traction device comprises a chain block, the fixed end of which is arranged on the corresponding tension beam and is in sliding connection with the corresponding tension beam, and the traction end is connected with the tension end of the tension tool; and the clamping end of the tensioning tool is in butt joint with the tensioning end of the adjacent stay cable.

Preferably, the lifting system comprises a hoisting lifting device, wherein the hoisting lifting device comprises a lifting hook, and the lifting hook is fixed on the top of a non-telescopic structure of the mobile platform; the winch is arranged on a fixed structure at the top of the bridge tower and is detachably connected with the lifting hook through a steel wire rope.

Preferably, the construction platform in the mobile cable tower, the lifting system further comprises a self-lifting device, the self-lifting device comprises two groups of oil cylinders, the two groups of oil cylinders are respectively arranged at two ends of the mobile platform, any group of oil cylinders are arranged along the height direction of the bridge tower, the fixed ends of the oil cylinders are arranged at the support seats adjacent to the support seats for supporting the mobile platform and are detachably connected with the support seats, and the pushing ends are fixedly connected with the mobile platform.

The invention also provides a construction method in the movable cable tower, which comprises the following steps:

s1, respectively arranging a plurality of groups of supporting seats on two opposite tower walls, wherein the supporting seats are arranged at intervals along the height direction of a bridge tower, stay cable tooth blocks are positioned between two adjacent groups of supporting seats, any group of supporting seats comprises a plurality of supporting seats which are arranged at intervals along the width direction of the bridge tower and are pre-buried on the corresponding tower walls, then assembling a movable cable tower inner construction platform and hoisting the movable platform to an initial construction position by using a hoisting lifting device;

s2, driving the two telescopic beam sections to slide outwards through a power mechanism, enabling the two distribution beams to be respectively abutted with the adjacent tower walls and supported on a corresponding group of supporting seats, and then releasing connection between the hoisting lifting device and the mobile platform;

s3, tensioning the stay cables anchored at the stay cable tooth blocks above the corresponding supporting seats by using a traction device and a tensioning tool;

s4, after tensioning construction is completed, the winch lifting device and the self-lifting device are matched to move the movable platform to the next construction position, and in the moving process, the power mechanism is used for controlling the displacement of the two telescopic beam sections, so that the movable platform is not interfered with the stay cable tooth blocks or the supporting seats;

s5, repeating the steps of S2-S4 until the stay cable stretching and other construction in the whole height range are completed.

The invention at least comprises the following beneficial effects:

1. according to the invention, the length of the mobile platform is freely adjusted through the telescopic structures at the two ends, the height position of the mobile platform is freely adjusted through the lifting system, and the mobile platform can adapt to the stay cable tensioning and other construction requirements at different positions in the whole height range of the bridge tower by matching with the traction device and the tensioning tool, so that the mechanization and automation degree of the adjustment of the mobile platform along with the construction position are improved, the tensioning construction difficulty and the workload of constructors are simplified, the tensioning construction safety and operability of the cable-stayed tower end are improved, and the construction efficiency and the construction quality are improved;

2. the telescopic length and the construction height of the mobile platform can be freely adjusted according to actual construction conditions, and the mobile platform can be suitable for tensioning construction of cable-stayed cable tower ends in cable-stayed bridge towers with various sizes, has wide application range and high reuse rate, and further saves construction cost;

3. the invention adopts the self-elevating device to realize the stable and accurate adjustment of the height position of the construction platform by matching with the hoisting elevating device, thereby realizing the mechanized and procedural conversion of the tensioning construction point, having high standardization degree, controllable construction quality and construction safety, and effectively solving the hidden trouble of nonstandard operation and large quality and safety risk existing in the manual operation by the traditional steel pipe scaffold.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic plan view of a construction platform in a mobile cable tower according to an embodiment of the present invention;

FIG. 2 is a schematic front elevation view of the construction platform in the mobile cable tower according to the embodiment;

FIG. 3 is a schematic side elevation view of the construction platform in the mobile cable tower according to the embodiment;

fig. 4 is a schematic view of a construction structure of S2 in a construction method in a mobile cable tower according to an embodiment of the present invention;

fig. 5 is a schematic view of the construction structure of S3 in the above embodiment;

fig. 6 is a schematic view of the construction structure of S41 in the above embodiment;

fig. 7 is a schematic view of the construction structure of S42-S43 in the above embodiment.

Reference numerals illustrate:

1. a stay cable tooth block; 2. a column; 3. a longitudinal beam; 4. a ladder stand; 5. a cross beam; 6. a tower wall; 7. a slide block; 8. stretching the beam; 9. railing; 10. a support leg; 11. a hoist; 12. a lifting hook; 13. a support base; 14. chain block; 15. stay cables; 16. tensioning a tool; 17. a limiting block; 18. an oil cylinder; 19. an oil cylinder pipeline; 20. a control system; 21. a distribution beam; 22. a wire rope; 23. a main body beam section; 24. a telescoping beam section; 25. a locking mechanism; 26. the current construction position; 27. a middle position; 28. and the next construction position.

Detailed Description

The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.

It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.

As shown in fig. 1 to 7, the present invention provides a mobile in-tower construction platform, comprising:

the movable platform is arranged between the two opposite tower walls 6 along the length direction of the bridge tower, and two ends of the movable platform are of telescopic structures and are respectively supported at the tops of supporting seats 13 pre-buried on the two tower walls;

the plurality of groups of upright posts 2 are arranged at intervals along the length direction of the mobile platform, and any group of upright posts comprises two upright posts which are oppositely arranged at two sides of the mobile platform and are fixed at the top of the mobile platform;

two tension beams 8 which are respectively arranged on two groups of upright posts 2 in the plurality of groups of upright posts, wherein any tension beam 8 is connected with the tops of the two corresponding upright posts;

two tensioning devices respectively arranged on the two tensioning beams, wherein any tensioning device comprises a tensioning tool 16 which is arranged on the corresponding tensioning beam 8 and is used for tensioning the stay cable 15; the traction device is arranged between the tensioning tool 16 and the tensioning beam 8 and is used for adjusting the tensioning position and the tensioning direction of the tensioning tool;

a lifting system disposed on the bridge tower and adapted to adjust the height position of the mobile platform.

In the technical scheme, a plurality of stay cable tooth blocks are arranged on the inner side of a bridge tower of the cable-stayed bridge (on two opposite tower walls) along the height direction at intervals and used for installation and anchoring of different stay cables, and the inclination angles of the stay cables at different positions are different, so that the structures of the corresponding stay cable tooth blocks and the installation angles on the tower walls are also different. The movable platform is arranged between the two opposite tower walls, can freely move along the height direction of the bridge tower under the action of the lifting system, and can avoid interference structures (pre-buried supporting seats, stay cable tooth blocks and the like) on the tower walls in an inward and simultaneous shrinkage mode in the moving process; the supporting seat is arranged on the inner side of the tower wall (the same side of the tower wall as the stay cable tooth blocks are positioned on) along the height direction of the bridge tower at intervals, the supporting seat can be a steel structure support, the number and the arrangement interval of the supporting seat are designed according to the number and the interval of the stay cable tooth blocks, the supporting seat is arranged at the proper position of any stay cable tooth block lower part, the supporting seat positioned above the stay cable tooth block is not interfered with the stay cable tooth block, and therefore, after the movable platform is lifted to the corresponding height position, the supporting seat positioned below the stay cable tooth block can be stably supported, at the moment, tensioning equipment and the stay cable tooth blocks are positioned at the similar height positions, and operators can conveniently use the tensioning equipment at two ends on the movable platform to respectively carry out tensioning construction on stay cables on two tower walls. The tensioning device is arranged on the tensioning beam, the mounting position of the tensioning beam in the length direction of the bridge tower can be adjusted according to the telescopic structure of the movable platform and the structure of the stay cable tooth block, and the tensioning beam can be arranged on the upright posts of different groups according to actual construction requirements, so that the initial mounting position of the tensioning tool is changed, the tensioning device can be better adapted to different bridge tower structures and structures of different stay cable tooth blocks, and the tensioning construction is convenient for operators; the stretching position (the relative position with the corresponding stay cable anchor block) and stretching direction (the relative angle with the corresponding stay cable anchor block) of the stretching tool can be adjusted through the traction device, so that the stretching tool can be more flexibly applied to different structures and angles of stay cable tooth blocks at different positions, and the construction efficiency and stretching construction quality are effectively improved. The tensioning tool is conventional equipment used in stay cable tensioning, in the embodiment, a tensioning machine with a jack can be selected, the clamping end of the tensioning machine is arranged towards the anchoring surface on the stay cable tooth block and used for clamping the corresponding stay cable to tension the stay cable, and the tensioning end of the tensioning machine is arranged towards the inner side of the movable platform and is convenient for operators to adjust the tensioning position and the tensioning direction by using the traction device. In addition, other conventional in-tower construction equipment can be carried on the construction platform, and when the construction platform is used for carrying out stay cable tensioning construction, operators can carry out various other constructions (such as in-tower crack and defect repair, stay cable anchor anti-corrosion treatment and the like) by utilizing the movable platform. The setting of stand does not interfere with moving platform's extending structure, and moving platform flexible in-process can not receive the barrier of stand promptly, and because stand setting is in moving platform's both sides edge, the stand that is close to moving platform tip also can not cause the interference to protruding structure (such as stay cable tooth piece etc.) on the tower wall. The climbing ladder 4 can be arranged on the tower wall at any side of the moving platform in a matched manner, is fixed on the corresponding tower wall along the height direction of the bridge tower and does not interfere with the moving platform, so that the climbing ladder is used as an auxiliary construction platform to cooperate with the moving platform for construction, and an operator can pass through the climbing ladder with relatively fixed positions to reciprocate between the moving platform and an external construction site. In addition, the mobile platform can be further provided with an integrated control system 20, and a conventional controller can be selected and installed on the mobile platform and electrically connected with each power mechanism (including a telescopic structure, tensioning equipment, a lifting system and the like) in the construction platform, so that an operator can conveniently and accurately control actions (working parameters) of each part in the construction process according to the actual construction state.

The invention realizes the free adjustment of the length of the movable platform through the telescopic structures at the two ends, can be suitable for the tensioning construction of the cable-stayed cable tower ends in cable-stayed bridge towers with various sizes, and has wide application range and high reuse rate; meanwhile, the free adjustment of the height position of the mobile platform is realized through the lifting system, the mobile platform can adapt to the stay cable tensioning and other construction requirements of different positions in the whole height range of the bridge tower by matching with the traction device and the tensioning tool, the mechanization and automation degree of the mobile platform along with the adjustment of the construction position are improved, the tensioning construction difficulty and the workload of constructors are simplified, the tensioning construction safety and operability of the cable-stayed tower end are improved, and the stay cable tensioning construction on two tower walls can be simultaneously satisfied by the tension beam-tensioning tool which is respectively arranged at the two ends of the mobile platform, so that the construction efficiency and the construction quality are effectively improved.

In another technical scheme, the mobile cable tower inner construction platform, the mobile platform includes a platform frame, which includes:

a plurality of stringers 3 arranged at intervals in the width direction of the pylon, any of which is arranged in the length direction of the pylon, including a main body girder section 23 which is a hollow structure penetrating in the axial direction; two telescopic beam sections 24 which are respectively sleeved at two ends of the main body beam section 23 and slide along the length direction of the main body beam section under the drive of a power mechanism;

a plurality of cross beams 5 arranged at intervals along the length direction of the bridge tower, any one of the cross beams being fixedly connected to the main body beam sections 23 of the plurality of longitudinal beams along the width direction of the bridge tower;

and two distributing beams 21 corresponding to the two telescopic beam sections 24, wherein any distributing beam 21 is connected with the outer ends of the telescopic beam sections 24 positioned at the same end on the longitudinal beams and supported on the corresponding supporting seat 13.

In the technical scheme, the mobile platform adopts a frame type structure, a beam body structure which is transversely and longitudinally staggered is formed by matching longitudinal beams (main beam sections) and transverse beams, so that stable support of construction equipment and operators on the mobile platform is realized, the main beam sections and the telescopic beams Duan Jun are hollow steel pipe structures, the telescopic beam sections can be sleeved inside the main beam sections and are in sliding connection with the main beam sections, a power mechanism (not shown in the drawings) is arranged in the middle of the main beam sections, the action ends of the power mechanism are fixedly connected with the inner end parts of the telescopic beam sections, and the action ends of the power mechanism move outwards or inwards along the length direction of the main beam sections during working, so that the telescopic beam sections are driven to extend outwards or shrink inwards, and in the embodiment, the power mechanism can be a pneumatic push rod; simultaneously, be equipped with a plurality of radial spacing holes on main part roof beam section and the flexible roof beam section that correspond, it sets up along length direction interval, after flexible roof beam Duan Xiangdui main part roof beam section removes to suitable position, can adopt locking mechanical system 25 (such as bolt, round pin axle etc.) to pass radial spacing hole on main part roof beam section and the flexible roof beam section in proper order, locks the relative position of flexible roof beam section and main part roof beam section, prevents that both from receiving external force influence and taking place relative movement or rocking in the work progress, guarantees construction stability. In addition, the telescopic beam Duan Wai end is further provided with a distribution beam, and the distribution beam is connected with a plurality of telescopic beam sections along the width direction of the bridge tower, so that the telescopic beam sections can be stably supported on supporting seats at corresponding height positions after outwards extending, even if the transverse installation positions of the supporting seats on the bridge tower change, the distribution beam can be adaptively erected on a plurality of supporting seats at the same height position on the same tower wall, and external impact force received by a movable platform is dispersed to the tower wall, so that the construction stability is further ensured.

In another technical scheme, the movable cable tower inner construction platform is characterized in that the plurality of groups of upright posts 2 are in one-to-one correspondence with the plurality of cross beams 5, and two upright posts 2 of any group of upright posts are respectively fixed at two ends of the corresponding cross beam 5 through supporting legs 10. Wherein, the stand is hollow tubular structure, and the landing leg is steel construction support. The multiple groups of upright posts are arranged to correspond to the multiple cross beams one by one, and because the tensioning equipment and the tensioning beams corresponding to the tensioning equipment are arranged on the two upright posts in the same group, acting force in tensioning construction can be transmitted to the upright posts firstly, the upright posts are arranged on the cross beams of the main body frame of the mobile platform, stable installation of the tensioning beams and the tensioning equipment can be realized, the stress structure of the whole construction platform is more reasonable, and the construction safety and stability are further guaranteed.

In another technical scheme, the mobile cable tower inner construction platform further comprises a platform panel, wherein the platform panel is paved at the top of the platform frame, and the platform panel comprises a main panel, and the main panel is paved at the top of a frame structure consisting of the main body beam section and the corresponding cross beam; and the two telescopic panels are respectively arranged at two ends of the main panel and are in sliding connection with the main panel, and any telescopic panel is paved at the top of a frame structure formed by the distribution beam and the telescopic beam section at the same end. In order to ensure the stability and safety of the construction operation of the operator on the mobile platform, a platform panel (not shown in the drawing) is further laid on the top of the platform frame in a matched manner, and is adapted to the telescopic structure of the main body beam section-telescopic beam section in the platform frame, the platform panel is also arranged to be a main panel and a telescopic panel, the main panel is arranged in the length range of the main body beam section in a fixed connection with a corresponding frame structure, the telescopic panel is arranged in the length range of the telescopic beam section, one end of the telescopic panel is fixed on a distribution beam at the end of a corresponding telescopic beam Duan Wai, the other end of the telescopic panel is sleeved in the main panel and is in sliding connection with the main panel, so that the main body beam section of the telescopic beam Duan Xiangdui is actively displaced under the driving of the power mechanism to drive the telescopic panel to be passively displaced relative to the main panel, and in the moving process, two ends of the telescopic panel are stably supported between the main panel and the distribution beam, and form a panel structure integrally laid on the telescopic beam Duan Shangfang, and when the telescopic beam Duan Huisu is integrally stretched into the main panel, the main panel is not interfered with the lower frame structure. In addition, the setting of platform panel should not interfere with the stand, for example, make the both sides of platform panel all be located the inboard of the stand of homonymy, perhaps lay the stand whole on the platform frame after, with stand according to former plane position fixed mounting at the panel top again, avoid the relative movement structure of flexible panel to interfere with the stand.

In another technical scheme, the construction platform in the movable cable tower further comprises two groups of railings 9 which are respectively arranged on the upright posts 2 on two sides of the movable platform, and any group of railings 9 are connected with a plurality of upright posts on the same side along the length direction of the movable platform. In the technical scheme, the plurality of groups of upright posts are used as vertical rod pieces, the railing is used as a transverse rod piece, and the upright posts and the transverse rod piece are connected in a staggered manner to form the protection structure of the construction platform. Any group of railing includes along the parallel interval setting of direction of height's many rails, and a plurality of stands of same one side are connected to any railing along moving platform's length direction, forms reliable protective structure in moving platform both sides, can effectively prevent construction equipment, the drop of operating personnel on the moving platform to guarantee construction safety, moving platform's both ends are the tower wall, can guarantee construction safety to a certain extent, also can adopt the cross-section to link to each other the tip of two groups of railings when necessary, further reduces the security risk of construction. Wherein, stand and railing all can adopt hollow tubular structure (hollow steel pipe), and the installation of stand and railing falls into two kinds of situations:

when the upright posts are only arranged within the length range of the main body beam section, the upright posts are normally erected and then connected by using the railing (this is the case in the embodiment);

when the stand column is not only arranged on the main body beam section, but also arranged on the telescopic beam section (one group or a plurality of groups of stand columns are arranged on the telescopic beam section), as the two ends of the mobile platform are telescopic structures, the railing arranged at the telescopic node of the mobile platform is also telescopic structures. Specifically, single railing includes main sleeve pipe and telescopic tube, and main sleeve pipe corresponds the setting and is directly over moving platform non-extending structure, and telescopic tube corresponds the setting and is directly over moving platform extending structure, and telescopic tube is located main sleeve pipe both ends and cup joints with it, and when moving platform's both ends were flexible, telescopic tube can slide in order to adapt to flexible displacement relative main sleeve pipe. The protection effect of the setting mode on the mobile platform is better, the position selection of the tension beam is more, and the application range is wider (the construction of the stay cable tooth blocks which can be better adapted to different sizes and angles). In addition, when the telescopic beam section is additionally provided with posts, care should be taken that the arrangement spacing of the posts around the telescopic joint should not interfere with the full range of movement of the telescopic beam section, i.e. the posts should not be arranged on the sections of the telescopic beam section that are allowed to retract into the main body beam section.

In another technical scheme, the movable cable tower inner construction platform is characterized in that the tension beam 8 is detachably connected with the two corresponding upright posts 2. The setting position of the tension beam is determined by the structure of the stay cable tooth block, the position of the stay cable anchored on the stay cable tooth block and the size of the selected tension tool, the tension beam at any construction position is required to meet the tension requirement (tension angle) of the stay cable at the corresponding height and is not interfered with the stay cable tooth block, and meanwhile, the length of the tension tool is required to be considered, so that the tension equipment arranged on the tension beam can be more convenient for operators to operate. The tensioning beam is detachably connected with the plurality of groups of upright posts, so that operators can temporarily detach and change the position of the tensioning beam according to the construction condition which changes in real time, and the tensioning beam is better adapted to different stay cable tooth block setting forms and is constructed rapidly and with high quality.

In another technical scheme, the traction device comprises a chain block 14, a traction steel wire rope, a shackle and the like, wherein the fixed end of the chain block is arranged on a corresponding tension beam and is in sliding connection with the corresponding tension beam, and the traction end is connected with the tensioning end of the tensioning tool; and the clamping end of the tensioning tool is in butt joint with the tensioning end of the adjacent stay cable. Specifically, the tensioning is required to be performed strictly along the setting direction of the stay cable during tensioning construction, and because the stay cable is anchored on the stay cable tooth block, the tensioning end of the stay cable is positioned on the anchoring surface of the stay cable tooth block, namely, the tensioning direction of the tensioning tool is required to be perpendicular to the stay cable anchoring surface on the stay cable tooth block. The tensioning end (shell) of the tensioning tool is connected with the traction steel wire rope of the chain block, the clamping end of the tensioning tool can be opposite to the butt joint at the tensioning end of the stay cable (namely, the position of the anchoring end of the stay cable on the tooth block of the stay cable) after being stably connected with the anchor head of the stay cable through adjusting the position of the chain block on the tensioning beam and the length of the traction steel wire rope, then the tensioning tool is started, the stay cable is tensioned according to the design requirement, and an operator can manually assist to press the tensioning tool on the tooth block of the stay cable to avoid relative displacement of the tensioning tool. The traction end of the chain block is provided with a traction steel wire rope, a shackle and other structures so as to realize connection of the chain block and a tensioning tool, the position and the tensioning direction (angle) of the tensioning tool can be accurately adjusted according to different setting conditions of stay ropes and stay rope tooth blocks, the chain block can be of a conventional type, the fixed end of the chain block is installed on a preset slideway on a tensioning beam 8 through a sliding block 7, a limiting mechanism (also an electric sliding rail structure such as a linear guide rail) is arranged between the sliding block and the slideway, after the position of the tensioning tool is aligned (the stay rope tooth blocks), the sliding block and the slideway are locked relatively through the limiting mechanism, the fixed end of the chain block is prevented from being displaced in tensioning construction, the tensioning construction effect is affected, and accordingly the tensioning construction accuracy is effectively guaranteed, and the construction quality is improved.

In another technical scheme, the lifting system comprises a winch lifting device, a lifting device and a lifting device, wherein the winch lifting device comprises a lifting hook 12 which is fixed on the top of a non-telescopic structure of the mobile platform; and a hoist 11 provided on a fixed structure at the top of the pylon and detachably connected to the hook 12 through a wire rope 22. The hoisting system comprises a conventional hoisting lifting device, wherein in order to ensure the hoisting stability, a plurality of hoisting machines can be arranged, and the hoisting machines are fixed at the top of the bridge tower and the projections of the hoisting machines on the movable platform are symmetrically distributed relative to the middle line of the bridge tower; the lifting hooks are arranged to be a plurality of lifting hooks, so that when the steel wire rope is wound and unwound by the lifting hooks, the lifting operation is synchronously performed by the plurality of lifting hooks, the stable adjustment of the height of the mobile platform can be realized under the condition that the plane position is unchanged, the horizontal position of the mobile platform cannot deviate due to uneven stress on two sides, and the normal operation of subsequent construction is influenced. The lifting hooks are arranged on a non-telescopic structure (namely a frame structure formed by the main body beam section and the cross beam) of the mobile platform, the telescopic structure of the end part is prevented from interfering with the lifting hooks in the telescopic process, and the structural strength and the stress structure of the non-telescopic structure are stable, so that the lifting stability can be further ensured.

In another technical scheme, the lifting system further comprises a self-lifting device, the self-lifting device comprises two groups of oil cylinders 18, the two groups of oil cylinders are respectively arranged at two ends of the mobile platform, any group of oil cylinders are arranged along the height direction of the bridge tower, the fixed ends of the oil cylinders 18 are arranged at the support seats 13 adjacent to the support seats for supporting the mobile platform and are detachably connected with the support seats, and the pushing ends are fixedly connected with the mobile platform. Specifically, the lifting system is further configured with a self-lifting device, and any one group of cylinders may include a plurality of cylinders in one-to-one correspondence with a plurality of support seats disposed at the same height position on the adjacent tower wall, and any one cylinder is installed between the mobile platform and a support seat located above/below the mobile platform (i.e., a support seat adjacent to the support seat supporting the mobile platform). In this embodiment, the oil cylinder is disposed between the support seat above the mobile platform and the mobile platform, and after the tensioning construction at the current position is completed, the oil cylinder is started to retract the pushing end, so that the mobile platform can be pulled up as a whole by a suitable distance. The oil cylinder is arranged at the outer end part of the telescopic structure of the mobile platform, the in-situ upward movement of the mobile platform can be realized under the condition that the end part of the mobile platform is not telescopic, compared with the lifting mode through the winch, the oil cylinder and the mobile platform adopt a rigid connection structure (the winch and a steel wire rope between the mobile platform are flexibly connected), the stability and the safety of the mobile platform in the height adjustment process can be better ensured, the mobile platform is not easily affected by external environmental factors to shake, shift and the like, but the end part of the mobile platform cannot be telescopic under the connection structure so as to avoid the inherent structure (stay cable tooth blocks, supporting seats above and the like) on the tower wall, therefore, after the mobile platform is lifted upwards by a certain distance by using a self-lifting device, the mobile platform needs to be continuously lifted by switching into the winch lifting device, and the mobile platform can finally move above the supporting seat on the previous layer and be stably supported on the supporting seat through the telescopic adjustment of the end part. In the process of lifting the mobile platform by using the oil cylinder, in order to further ensure the accuracy and stability of the lifting direction, one or more limiting blocks 17 can be arranged on the tower wall adjacent to the oil cylinder and clamped between the tower wall and the cylinder body moving on the oil cylinder, when the pushing end of the oil cylinder retracts to drive the mobile platform to move upwards, the cylinder body is abutted to the side wall of the limiting block and slides relative to the side wall of the limiting block, so that the displacement or vibration of the pushing end of the oil cylinder in the horizontal direction is limited, the oil cylinder is ensured to stably lift along the vertical direction in the working process, and the working stability of the oil cylinder is improved. The driving unit (hydraulic station, power supply, etc.) of the oil cylinder can be arranged on the mobile platform and connected with the oil cylinders at two ends through the oil cylinder pipeline 19, and the control unit can be integrated in a control system 20 matched with the mobile platform, and is uniformly configured and adjusted by operators to realize the real-time regulation and control of the self-lifting device.

The invention also provides a construction method in the movable cable tower, which comprises the following steps:

s1, respectively arranging a plurality of groups of supporting seats 13 on two opposite tower walls 6, wherein the supporting seats are arranged at intervals along the height direction of a bridge tower, a stay cable tooth block 1 is positioned between two adjacent groups of supporting seats 13, any group of supporting seats comprises a plurality of supporting seats which are arranged at intervals along the width direction of the bridge tower and are pre-buried on the corresponding tower walls, then assembling a movable cable tower inner construction platform and hoisting the movable platform to an initial construction position by using a hoisting lifting device;

s2, driving the two telescopic beam sections 24 to slide outwards through a power mechanism, enabling the two distribution beams 21 to respectively abut against the adjacent tower walls 6 and support the two distribution beams on a corresponding group of support seats 13, and then releasing connection between the winch lifting device and the mobile platform;

s3, tensioning the stay cables 15 anchored at the stay cable tooth blocks above the corresponding supporting seats by using a traction device and a tensioning tool 16;

s4, after tensioning construction is completed, the winch lifting device and the self-lifting device are used for moving the moving platform to the next construction position, and in the moving process, the power mechanism is used for controlling the displacement of the two telescopic beam sections 24, so that the moving platform is not interfered with the stay cable tooth block 1 or the supporting seat 13;

s5, repeating the steps of S2-S4 until the stay cable stretching and other constructions (such as repair of cracks and defects in the tower, corrosion prevention treatment of stay cable anchors and the like) within the whole height range are completed.

In this embodiment, the same group of supporting seats on the same tower wall comprises two supporting seats, which are arranged at intervals and respectively correspond to two sides of the mobile platform; correspondingly, in the self-lifting device of the mobile platform, the same group of oil cylinders comprises two oil cylinders which are fixed at two ends of a distribution beam of the mobile platform, and after the distribution beam outwards moves and is erected on one group of supporting seats, the oil cylinders are just above the corresponding supporting seats. Under initial condition, the hydro-cylinder is located between two adjacent support bases, after the hydro-cylinder pushes away the end and pushes away outwards, the top (stiff end) of hydro-cylinder can be followed vertical direction and upwards moved to the supporting seat butt with the top, accomplish the connection from elevating gear after fixing connection with the hydro-cylinder stiff end and supporting seat, the connection from elevating gear can go on before the stay cable stretch-draw of current position, thereby further improve the stability of moving platform between two tower walls in the stay cable stretch-draw construction, and evenly disperse the impact force in the construction on different supporting seats and the tower wall, improve the atress structural rationality, prevent that the supporting seat warp.

In the above technical scheme, in S4, when the winch lifting device and the self-lifting device are used to cooperate to move the mobile platform to the next construction position, two movement conditions exist:

when moving from a lower construction position to an upper construction position:

s41, fixing the fixed end of each oil cylinder in the self-lifting device on a group of supporting seats positioned above, and then controlling the oil cylinders to retract, and lifting the mobile platform upwards from the current construction position 26 to the middle position 27 until the mobile platform (the top surface of the distribution beam) interferes with the stay cable tooth blocks;

s42, connecting a steel wire rope of a winch lifting device with a lifting hook at the top of the mobile platform and tightening the steel wire rope to carry out load-bearing system conversion (the gravity of the mobile platform is completely transferred onto the steel wire rope of the winch by a supporting seat);

and S43, the connection between the oil cylinder and the upper supporting seat is released, the two telescopic beams Duan Xiangna are driven by the power mechanism to retract to a stay cable tooth block avoiding the position, and the movable platform is further vertically lifted upwards from the middle position 27 to the next construction position 28 (the top of the supporting seat positioned above) by using the winch lifting device.

When moving from an upper construction position to a lower construction position:

t41, connecting a steel wire rope of a winch lifting device with a lifting hook at the top of the mobile platform, tightening the steel wire rope to carry out load-bearing system conversion (the gravity of the mobile platform is completely transferred onto the steel wire rope of a winch from a supporting seat), then releasing the connection between the oil cylinder and a supporting seat above, driving two telescopic beams Duan Xiangna to shrink to the supporting seat avoiding the position through a power mechanism, and vertically placing the mobile platform to the bottom of a stay cable tooth block positioned below by using the winch lifting device (the relative length of the telescopic beam section can be adjusted in real time to avoid the stay cable tooth block in the process of lowering);

t42, driving the two telescopic beam sections to slide outwards through a power mechanism, enabling the two distribution beams to be respectively abutted against the adjacent tower walls, then fixing the fixed ends of the oil cylinders in the self-elevating device on a group of supporting seats above the fixed ends of the oil cylinders and converting a bearing system (the gravity of the mobile platform is completely transferred onto the supporting seats through a steel wire rope of a winch);

and T43, releasing the connection between the winch lifting device and the mobile platform, and controlling the oil cylinder to push outwards to stably place the mobile platform on the supporting seat below.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (10)

1. A mobile in-tower construction platform, comprising:

the movable platform is arranged between two opposite tower walls along the length direction of the bridge tower, and two ends of the movable platform are of telescopic structures and are respectively supported at the tops of supporting seats pre-buried on the two tower walls;

the plurality of groups of upright posts are arranged at intervals along the length direction of the mobile platform, and any group of upright posts comprises two upright posts which are oppositely arranged at two sides of the mobile platform and are fixed at the top of the mobile platform;

two tensile beams which are respectively arranged on two groups of upright posts in the plurality of groups of upright posts, wherein any tensile beam is connected with the tops of the two corresponding upright posts;

the two tensioning devices are respectively arranged on the two tensioning beams, and any tensioning device comprises a tensioning tool which is arranged on the corresponding tensioning beam and used for tensioning the stay cable; the traction device is arranged between the tensioning tool and the tensioning beam and is used for adjusting the tensioning position and the tensioning direction of the tensioning tool;

a lifting system disposed on the bridge tower and adapted to adjust the height position of the mobile platform.

2. A mobile in-tower construction platform according to claim 1, wherein the mobile platform comprises a platform frame comprising:

the longitudinal beams are arranged at intervals along the width direction of the bridge tower, any longitudinal beam is arranged along the length direction of the bridge tower, and the bridge tower comprises a main body beam section which is of a hollow structure penetrating along the axial direction; the two telescopic beam sections are respectively sleeved at two ends of the main body beam section in an inner sleeve manner and slide along the length direction of the main body beam section under the drive of the power mechanism;

the cross beams are arranged at intervals along the length direction of the bridge tower, and any cross beam is fixedly connected with the main body beam sections of the longitudinal beams along the width direction of the bridge tower;

and two distributing beams which are arranged with the two telescopic beams Duan Duiying, wherein any distributing beam is connected with the outer ends of the telescopic beam sections positioned at the same end on the longitudinal beams and is supported on the corresponding supporting seat.

3. The mobile cable tower interior construction platform of claim 2, wherein the plurality of sets of upright posts are in one-to-one correspondence with the plurality of cross beams, and two upright posts of any set of upright posts are respectively fixed at two ends of the corresponding cross beam through supporting legs.

4. A mobile in-tower construction platform according to claim 2, further comprising a platform deck mounted atop the platform frame, the platform deck comprising a main deck mounted atop a frame structure formed of the main body beam sections and corresponding cross beams; and the two telescopic panels are respectively arranged at two ends of the main panel and are in sliding connection with the main panel, and any telescopic panel is paved at the top of a frame structure formed by the distribution beam and the telescopic beam section at the same end.

5. The mobile in-tower construction platform of claim 1, further comprising two sets of rails disposed on the posts on each side of the mobile platform, wherein any set of rails connects the posts on the same side along the length of the mobile platform.

6. A mobile in-tower construction platform according to claim 1, wherein the tensile beam is detachably connected to the corresponding two uprights.

7. The mobile cable tower interior construction platform of claim 1, wherein the traction device comprises a chain block, the fixed end of which is arranged on the corresponding tension beam and is in sliding connection with the corresponding tension beam, and the traction end is connected with the tension end of the tension tool; and the clamping end of the tensioning tool is in butt joint with the tensioning end of the adjacent stay cable.

8. A mobile in-tower construction platform according to claim 1, wherein the lifting system comprises a hoist lifting device comprising a hook secured to the top of the mobile platform non-telescoping structure; the winch is arranged on a fixed structure at the top of the bridge tower and is detachably connected with the lifting hook through a steel wire rope.

9. The mobile cable tower interior construction platform of claim 8, wherein the lifting system further comprises a self-elevating device comprising two sets of cylinders respectively disposed at two ends of the mobile platform, any one set of cylinders being disposed along the height direction of the bridge tower, the fixed ends of the cylinders being disposed at and detachably connected to a support base adjacent to a support base supporting the mobile platform, and the pushing end being fixedly connected to the mobile platform.

10. The construction method in the movable cable tower is characterized by comprising the following steps of:

s1, respectively arranging a plurality of groups of supporting seats on two opposite tower walls, wherein the supporting seats are arranged at intervals along the height direction of a bridge tower, stay cable tooth blocks are positioned between two adjacent groups of supporting seats, any group of supporting seats comprises a plurality of supporting seats which are arranged at intervals along the width direction of the bridge tower and are pre-buried on the corresponding tower walls, then assembling a movable cable tower inner construction platform and hoisting the movable platform to an initial construction position by using a hoisting lifting device;

s2, driving the two telescopic beam sections to slide outwards through a power mechanism, enabling the two distribution beams to be respectively abutted with the adjacent tower walls and supported on a corresponding group of supporting seats, and then releasing connection between the hoisting lifting device and the mobile platform;

s3, tensioning the stay cables anchored at the stay cable tooth blocks above the corresponding supporting seats by using a traction device and a tensioning tool;

s4, after tensioning construction is completed, the winch lifting device and the self-lifting device are matched to move the movable platform to the next construction position, and in the moving process, the power mechanism is used for controlling the displacement of the two telescopic beam sections, so that the movable platform is not interfered with the stay cable tooth blocks or the supporting seats;

s5, repeating the steps of S2-S4 until the stay cable stretching and other construction in the whole height range are completed.

Images