A mobile cable tower inner construction platform and a construction method

Abstract

The application discloses a mobile cable tower inner construction platform and a construction method, which comprises a mobile platform, both ends of which are telescopic structures and are respectively supported on the top of support seats embedded in two tower walls; a plurality of groups of stand columns, any group of stand columns comprising two stand columns arranged on both sides of the mobile platform; a tension beam arranged on each group of stand columns and connected to the top of the corresponding two stand columns; a tension device arranged on the tension beam and used for tensioning a cable-stayed cable; and a lifting system arranged on a bridge tower and used for adjusting the height position of the mobile platform. The mobile platform length is freely adjusted through the telescopic structure of both ends, the height position of the mobile platform is freely adjusted through the lifting system, and the mobile platform can adapt to the cable-stayed cable tensioning and other construction requirements at different positions in the full height range of the bridge tower through cooperation of a traction device and a tension tool, so that the construction safety is improved, and the construction efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable-stayed construction technology. More particularly, the present application relates to a mobile construction platform inside a cable-stayed tower and a construction method. BACKGROUND

[0002] Cable-stayed bridges are increasingly favored in bridge type selection due to their large span and aesthetic appearance, and are widely used in large-span bridge construction across rivers and seas. Cable-stayed cables are structural system components and main load-bearing components of cable-stayed bridges, with characteristics such as large flexibility, small mass, and small damping. As the bridge span increases and the service life increases, cable-stayed cables are prone to vibration under the action of external environments such as wind, rain, and earthquakes, and traffic loads. Long-term large-scale vibration can have a significant impact on the durability of bridge structures and components, and in severe cases of cable performance degradation, cable replacement may be required to meet the safety performance requirements of the bridge. Therefore, the installation quality and stability of cable-stayed cables have a crucial impact on the stability and durability of the overall bridge.

[0003] During cable-stayed cable installation, cable-stayed tower end tensioning construction is an important construction process. Since the 1990s to the early 21st century, most cable-stayed bridge towers did not have a dedicated tensioning construction platform, and there were various types of diseases in old bridge towers, such as concrete cracks, concrete defects, anchor corrosion, and anchor oil leakage. There are many operations to be performed, and a simple steel pipe scaffold erected by manual labor is generally used as a construction platform for construction, which has problems such as a complicated process, poor operability, high safety risks, and low standardization.

[0004] To solve the above problems, a mobile construction platform inside a cable-stayed tower and a construction method are needed to improve the safety of cable-stayed tower end tensioning construction while improving construction efficiency and quality. SUMMARY

[0005] The purpose of the present application is to provide a mobile construction platform inside a cable-stayed tower and a construction method, which can freely adjust the length of the mobile platform through the telescopic structure at both ends, freely adjust the height position of the mobile platform through the lifting system, and adapt to the tensioning of cable-stayed cables and other construction needs at different positions within the full height range of the tower by cooperating with the traction device and tensioning tool, thereby improving construction safety while improving construction efficiency and quality.

[0006] To achieve these objects and other advantages and in accordance with the purpose of the present application, a mobile construction platform inside a cable-stayed tower is provided, comprising:

[0007] A mobile platform is arranged between two opposite tower walls in the length direction of the tower, and the two ends of the mobile platform are telescopic structures and are respectively supported on the top of the support seats embedded in the two tower walls;

[0008] a plurality of groups of columns, which are arranged at intervals along the length direction of the moving platform, any one group of columns comprising two columns, which are oppositely arranged at two sides of the moving platform and fixed at the top thereof;

[0009] two tensioning beams, which are arranged on two groups of columns among the plurality of groups of columns respectively, any one tensioning beam connecting the top of the corresponding two columns;

[0010] two tensioning devices, which are arranged on the two tensioning beams respectively, any one tensioning device comprising a tensioning tool, which is arranged on the corresponding tensioning beam and used for tensioning the cable-stayed cable; and a traction device, which is arranged between the tensioning tool and the tensioning beam and used for adjusting the tensioning position and tensioning direction of the tensioning tool;

[0011] a lifting system, which is arranged on the bridge tower and used for adjusting the height position of the moving platform.

[0012] Preferably, the mobile cable-stayed construction platform, the moving platform comprises a platform frame, which comprises:

[0013] a plurality of longitudinal beams, which are arranged at intervals along the width direction of the bridge tower, any one longitudinal beam being arranged along the length direction of the bridge tower and comprising a main beam segment, which is a hollow structure penetrating along the axial direction; and two telescopic beam segments, which are respectively sleeved at two ends of the main beam segment and slide along the length direction of the main beam segment under the driving of a power mechanism;

[0014] a plurality of cross beams, which are arranged at intervals along the length direction of the bridge tower, any one cross beam being fixedly connected to the main beam segments of the plurality of longitudinal beams along the width direction of the bridge tower;

[0015] two distribution beams, which are arranged correspondingly to the two telescopic beam segments, any one distribution beam connecting the outer end portions of the plurality of telescopic beam segments at the same end of the plurality of longitudinal beams and supported on the corresponding support seat.

[0016] Preferably, the mobile cable-stayed construction platform, the plurality of groups of columns correspond one-to-one to the plurality of cross beams, the two columns of any one group of columns being fixedly connected to two ends of the corresponding cross beam through the support legs respectively.

[0017] Preferably, the mobile cable-stayed construction platform, the moving platform further comprises a platform panel, which is laid on the top of the platform frame, the platform panel comprising a main panel, which is laid on the top of the frame structure composed of the main beam segments and the corresponding cross beams; and two telescopic panels, which are arranged at two ends of the main panel and connected to the main panel in a sliding manner, any one telescopic panel being laid on the top of the frame structure composed of the distribution beam and the telescopic beam segment at the same end.

[0018] Preferably, the mobile cable-tower construction platform further comprises two groups of railings, which are arranged on the columns on the two sides of the mobile platform respectively, and any group of railings is connected with the columns on the same side along the length direction of the mobile platform.

[0019] Preferably, the mobile cable-tower construction platform, the tensioning beam is detachably connected with the corresponding two columns.

[0020] Preferably, the mobile cable-tower construction platform, the traction device comprises a hand-operated hoist, a fixed end of which is arranged on the corresponding tensioning beam and is in sliding connection with the tensioning beam, and a traction end of which is connected with the tensioning end of the tensioning tool; and the clamping end of the tensioning tool is in opposite abutment with the tensioning end of the adjacent cable.

[0021] Preferably, the mobile cable-tower construction platform, the lifting system comprises a winch lifting device, which comprises a hook fixed on the top of the non-extensible structure of the mobile platform, and a winch arranged on the fixed structure at the top of the bridge tower and detachably connected with the hook through a steel wire rope.

[0022] Preferably, the mobile cable-tower construction platform, the lifting system further comprises a self-lifting device, which comprises two groups of oil cylinders arranged at the two ends of the mobile platform respectively, and any group of oil cylinders is arranged along the height direction of the bridge tower, a fixed end of the oil cylinder is arranged at a support seat adjacent to the support seat supporting the mobile platform and is detachably connected with the support seat, and a pushing end is fixedly connected with the mobile platform.

[0023] The application further provides a mobile cable-tower construction method, which comprises the following steps:

[0024] S1, a plurality of groups of support seats are arranged on the opposite two tower walls respectively, and are arranged at intervals along the height direction of the bridge tower, the cable tooth blocks are located between the adjacent two groups of support seats, any group of support seats comprises a plurality of support seats arranged at intervals along the width direction of the bridge tower and pre-buried on the corresponding tower wall, then the mobile cable-tower construction platform is assembled, and the winch lifting device is used to hoist the mobile platform to the initial construction position;

[0025] S2, the two telescopic beam segments are driven to slide outward by the power mechanism, so that the two distribution beams are in abutment with the adjacent tower walls and supported on the corresponding group of support seats, and then the connection between the winch lifting device and the mobile platform is released;

[0026] S3, the cable is tensioned by using the traction device in cooperation with the tensioning tool;

[0027] S4, after the tensioning construction is completed, the mobile platform is moved to the next construction position by using the winch lifting device and the self-lifting device, and during the moving process, the displacement of the two telescopic beam segments is controlled by the power mechanism, so that the mobile platform does not interfere with the cable-stayed cable tooth block or the supporting seat;

[0028] S5, the steps of S2-S4 are repeated until the cable-stayed cable tensioning and other constructions in the whole height range are completed.

[0029] The present application at least includes the following beneficial effects:

[0030] 1, the present application realizes the free adjustment of the length of the mobile platform through the telescopic structure at both ends, realizes the free adjustment of the height position of the mobile platform through the lifting system, cooperates with the traction device and the tensioning tool, so that the mobile platform can adapt to the cable-stayed cable tensioning and other construction requirements at different positions in the whole height range of the bridge tower, improves the mechanization and automation degree of the mobile platform adjusting with the construction position, simplifies the tensioning construction difficulty and the workload of the construction personnel, improves the cable-stayed tower end tensioning construction safety and operability, and improves the construction efficiency and construction quality;

[0031] 2, the telescopic length and the construction height of the mobile platform in the present application can be freely adjusted according to the actual construction situation, can be applied to the cable-stayed tower end tensioning construction in the cable-stayed bridge tower of various sizes, has wide application range, high reusability, and further saves the construction cost;

[0032] 3, the self-lifting device is used in the present application to cooperate with the winch lifting device to realize the stable and accurate adjustment of the construction platform height position, so as to realize the mechanization and process conversion of the tensioning construction point, which has high standardization degree, controllable construction quality and construction safety, effectively solves the hidden danger of non-standard operation, quality and safety risk when manual operation is carried out through the traditional steel pipe scaffold.

[0033] Other advantages, objects and characteristics of the present application will be embodied in part through the following description, and part will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a plane structure schematic view of a mobile tower internal construction platform according to an embodiment of the present application;

[0035] Figure 2 It is a front elevation structure schematic view of the mobile tower internal construction platform in the above embodiment;

[0036] Figure 3 It is a side elevation structure schematic view of the mobile tower internal construction platform in the above embodiment;

[0037] Figure 4 Fig. 2 is a schematic view of a construction structure of S2 in a mobile cable tower inner construction method according to an embodiment of the present application;

[0038] Figure 5 Fig. 3 is a schematic view of a construction structure of S3 in the above embodiment;

[0039] Figure 6 Fig. 4 is a schematic view of a construction structure of S41 in the above embodiment;

[0040] Figure 7 Fig. 5 is a schematic view of a construction structure of S42-S43 in the above embodiment.

[0041] Legend of reference signs:

[0042] 1, cable tooth block; 2, stand column; 3, longitudinal beam; 4, ladder; 5, cross beam; 6, tower wall; 7, sliding block; 8, tension beam; 9, railing; 10, support leg; 11, winch; 12, lifting hook; 13, support seat; 14, hand-operated hoist; 15, cable; 16, tensioning tool; 17, limiting block; 18, oil cylinder; 19, oil cylinder pipeline; 20, control system; 21, distribution beam; 22, steel wire rope; 23, main beam section; 24, telescopic beam section; 25, locking mechanism; 26, current construction position; 27, intermediate position; 28, next construction position. DETAILED DESCRIPTION

[0043] The present application will be further described below in conjunction with the drawings, so that those skilled in the art can implement the present application according to the description and the drawings.

[0044] It should be noted that the experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present application, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] As shown in Figures 1-7 the present application provides a mobile cable tower inner construction platform, comprising:

[0046] a mobile platform arranged between two opposite tower walls 6 along the length direction of the bridge tower, both ends of the mobile platform being telescopic structures and being respectively supported on the top of support seats 13 embedded in the two tower walls;

[0047] a plurality of groups of columns 2 arranged at intervals along the length direction of the moving platform, any group of columns comprising two columns arranged oppositely on two sides of the moving platform and fixed on the top of the moving platform;

[0048] two tensioning beams 8 arranged on two groups of columns 2 in the plurality of groups of columns respectively, any tensioning beam 8 connecting the top of the corresponding two columns;

[0049] two tensioning devices arranged on the two tensioning beams respectively, any tensioning device comprising a tensioning tool 16 arranged on the corresponding tensioning beam 8 and used for tensioning the stay cable 15; a traction device arranged between the tensioning tool 16 and the tensioning beam 8 and used for adjusting the tensioning position and tensioning direction of the tensioning tool;

[0050] a lifting system arranged on the bridge tower and used for adjusting the height position of the moving platform.

[0051] In the technical solution, the inner side of the tower of the cable-stayed bridge (the opposite two tower walls) is provided with a plurality of cable-stayed cable tooth blocks in the height direction for installation and anchoring of different cable-stayed cables. Since the inclination angles of the cable-stayed cables at different positions are different, the structures of the corresponding cable-stayed cable tooth blocks and the installation angles on the tower wall are also different. The moving platform is arranged between the opposite two tower walls and can freely move in the height direction of the tower under the action of the lifting system. In the moving process, the telescopic structures at both ends of the moving platform can avoid the interference structures (pre-buried support seats, cable-stayed cable tooth blocks, etc.) on the tower wall by simultaneously shrinking inward. After moving to the appropriate position in the height direction, the telescopic structures at both ends of the moving platform simultaneously extend outward to abut against the inner side of the adjacent tower wall and can stably support the top of the support seat at this height position. The support seats are arranged on the inner side of the tower wall in the height direction (on the same side of the cable-stayed cable tooth blocks) and can be selected as steel structure supports. The number and arrangement spacing of the support seats are designed according to the number and spacing of the cable-stayed cable tooth blocks, so that a suitable position below any cable-stayed cable tooth block is arranged with a support seat, and the support seat above the cable-stayed cable tooth block does not interfere with the cable-stayed cable tooth block. Therefore, when the moving platform is lifted to the corresponding height position, it can be stably supported on the support seat below the cable-stayed cable tooth block. At this time, the tensioning equipment and the cable-stayed cable tooth block are located at similar height positions, and the tensioning equipment at both ends can be conveniently used by the workers on the moving platform to tension the cable-stayed cables on the two tower walls, respectively. The tensioning equipment is installed on the tensioning beam, and the installation position of the tensioning beam in the length direction of the tower can be adjusted according to the telescopic structure of the moving platform and the structure of the cable-stayed cable tooth block. According to the actual construction needs, the tensioning beam can be installed on different groups of columns to change the initial installation position of the tensioning tooling, which can better adapt to different tower structures and different structures of the cable-stayed cable tooth blocks, facilitating the tensioning construction of the workers. The tensioning position (relative position to the corresponding cable-stayed cable anchor block) and the tensioning direction (relative angle to the corresponding cable-stayed cable anchor block) of the tensioning tooling can be adjusted by the traction device, so that the tensioning tooling can be more flexible to adapt to different structures and angles of the cable-stayed cable tooth blocks at different positions, effectively improving the construction efficiency and tensioning construction quality. The tensioning tooling is a conventional equipment used in cable-stayed cable tensioning. In this embodiment, a tensioning machine with a jack can be selected, and the clamping end is arranged towards the anchoring surface on the cable-stayed cable tooth block for clamping the corresponding cable-stayed cable for tensioning. The tensioning end of the tensioning machine is arranged towards the inner side of the moving platform to facilitate the workers to adjust the tensioning position and the tensioning direction by the traction device. In addition, other conventional tower interior construction equipment can also be carried on the construction platform, and the workers can use the moving platform to perform various other constructions (such as tower interior crack and defect repair, cable-stayed cable anchor corrosion treatment, etc.) while using the construction platform for cable-stayed cable tensioning construction.The setting of the column does not interfere with the telescopic structure of the moving platform, that is, the moving platform will not be blocked by the column during the telescopic process, and since the column is arranged at the two side edges of the moving platform, the column close to the end of the moving platform will not interfere with the protruding structure on the tower wall, such as the cable tooth block and the like. A ladder 4 can be arranged on the tower wall on either side of the moving platform, which is fixed on the corresponding tower wall in the height direction of the bridge tower and does not interfere with the moving moving platform, so that the auxiliary construction platform cooperates with the moving platform to perform construction, and the operation personnel can go back and forth between the moving platform and the external construction site through the ladder with a relatively fixed position. In addition, the moving platform can also be configured with an integrated control system 20, which can be selected to be a conventional controller, which is installed on the moving platform and is electrically connected with each power mechanism in the construction platform, including the telescopic structure, the tensioning equipment, the lifting system and the like, so as to facilitate the operation personnel to accurately control the action (working parameter) of each component in the construction process according to the actual construction state.

[0052] The present application realizes the free adjustment of the length of the moving platform through the telescopic structure at both ends, can be applied to the cable tower end tensioning construction of the cable of the cable-stayed bridge in various sizes, has wide application range and high reusability; at the same time, the height position of the moving platform is realized through the lifting system, and the moving platform can adapt to the tensioning of the cable at different positions in the full height range of the bridge tower and other construction requirements through the traction device and the tensioning tool, so that the mechanization and automation degree of the moving platform adjusting with the construction position is improved, the tensioning construction difficulty and the workload of the construction personnel are simplified, the safety and operability of the cable tower end tensioning construction are improved, and the tensioning beam-tensioning tool arranged at both ends of the moving platform can simultaneously satisfy the tensioning construction of the cable on two tower walls, so that the construction efficiency and the construction quality are effectively improved.

[0053] In another technical scheme, the mobile cable tower construction platform comprises a platform frame, which comprises:

[0054] A plurality of longitudinal beams 3 are arranged at intervals in the width direction of the bridge tower, and any longitudinal beam is arranged in the length direction of the bridge tower and comprises a main beam segment 23 which is a hollow structure penetrating in the axial direction; two telescopic beam segments 24 which are respectively sleeved at both ends of the main beam segment 23 and slide in the length direction of the main beam segment under the drive of a power mechanism;

[0055] A plurality of transverse beams 5 are arranged at intervals in the length direction of the bridge tower, and any transverse beam is fixedly connected with the main beam segments 23 of the plurality of longitudinal beams in the width direction of the bridge tower;

[0056] Two distribution beams 21 are arranged correspondingly with the two telescopic beam segments 24, and any distribution beam 21 is connected with the outer end portions of the plurality of telescopic beam segments 24 at the same end of the plurality of longitudinal beams and is supported on the corresponding support seat 13.

[0057] In the above technical solution, the mobile platform adopts a frame structure, and the longitudinal beams (main beam segments) and the cross beams are cooperated to form a beam structure arranged in a crosswise and longitudinal staggered manner to stably support the construction equipment and the operating personnel on the mobile platform. The main beam segments and the telescopic beam segments are both hollow steel pipe structures, the telescopic beam segments can be sleeved inside the main beam segments and are slidably connected with the main beam segments. The middle part of the main beam segment is internally provided with a power mechanism (not shown in the drawings), the acting end of which is fixedly connected with the inner end part of the telescopic beam segment. The acting end of the power mechanism moves outward or inward along the length direction of the main beam segment during work, thereby driving the telescopic beam segment to extend outward or contract inward. In this embodiment, the power mechanism can be a pneumatic push rod. Meanwhile, a plurality of radial limiting holes are correspondingly arranged on the main beam segment and the telescopic beam segment and are arranged at intervals along the length direction. When the telescopic beam segment is moved to a suitable position relative to the main beam segment, a locking mechanism 25 (such as a bolt, a pin shaft or the like) can be used to sequentially pass through the radial limiting holes on the main beam segment and the telescopic beam segment, so as to lock the relative position of the telescopic beam segment and the main beam segment, prevent the relative movement or shaking of the two during construction due to external force, and ensure the construction stability. In addition, the outer end part of the telescopic beam segment is further provided with a distribution beam which connects a plurality of telescopic beam segments along the width direction of the bridge tower, so that the telescopic beam segment can be stably supported on the support seat at the corresponding height position after extending outward. Even if the transverse installation position of the support seat on the bridge tower changes, the distribution beam can also be adaptively erected on a plurality of support seats at the same height position on the same tower wall, and the external impact force received by the mobile platform is dispersed to the tower wall, further ensuring the construction stability.

[0058] In another technical solution, the mobile cable tower internal construction platform, the plurality of groups of columns 2 correspond to the plurality of cross beams 5 one by one, and the two columns 2 of any group of columns are fixed at the two ends of the corresponding cross beam 5 through the legs 10. Among them, the column is a hollow tubular structure, and the leg is a steel structure support. The plurality of groups of columns are arranged to correspond to the plurality of cross beams one by one. Since the tensioning device and the corresponding tensioning beam are arranged on the two columns in the same group, the force during tensioning construction is also transmitted to the column first. Arranging the column on the cross beam of the mobile platform main frame can realize stable installation of the tensioning beam and the tensioning device, make the stress structure of the whole construction platform more reasonable, and further ensure the construction safety and stability.

[0059] In another technical solution, the mobile construction platform in a cable-stayed tower further comprises a platform panel laid on the top of the platform frame, the platform panel comprises a main panel laid on the top of the frame structure composed of the main beam segment and the corresponding cross beam, and two telescopic panels respectively arranged at the two ends of the main panel and slidably connected with the main panel, any telescopic panel being laid on the top of the frame structure composed of the distribution beam and the telescopic beam segment at the same end. In order to ensure the stability and safety of the construction operation of the workers on the mobile platform, a platform panel (not shown in the drawings) is further laid on the top of the platform frame, and the platform panel is also provided with two parts, i.e., the main panel and the telescopic panel, to adapt to the telescopic structure of the main beam segment and the telescopic beam segment in the platform frame. The main panel is arranged in the length range of the main beam segment and fixedly connected with the corresponding frame structure, and the telescopic panel is arranged in the length range of the telescopic beam segment, one end of the telescopic panel being fixed on the distribution beam at the outer end of the corresponding telescopic beam segment and the other end being sleeved in the main panel and slidably connected with the main panel. Thus, under the driving of the power mechanism, the telescopic beam segment is actively displaced relative to the main beam segment, driving the telescopic panel to be passively displaced relative to the main panel. In the moving process, the two ends of the telescopic panel are stably supported between the main panel and the distribution beam, and the panel structure is integrally laid above the telescopic beam segment. When the telescopic beam segment is retracted, the telescopic panel can be integrally extended into the main panel without interfering with the platform frame structure below. In addition, the platform panel should not interfere with the stand column, for example, the two sides of the platform panel are located inside the stand column at the same side, or the stand column is integrally laid on the platform frame and then fixedly installed on the top of the panel at the original planar position, so as to avoid the interference between the relative displacement structure of the telescopic panel and the stand column.

[0060] In another technical solution, the mobile construction platform in a cable-stayed tower further comprises two groups of railings 9 respectively arranged on the stand columns 2 at the two sides of the mobile platform, and any group of railings 9 is connected with the stand columns at the same side along the length direction of the mobile platform. In the above technical solution, the stand columns are used as vertical rod members, and the railings are used as horizontal rod members, and the two are staggered and connected to jointly form the protection structure of the construction platform. Any group of railings comprises a plurality of railings arranged in parallel and spaced apart along the height direction, and any railing is connected with the stand columns at the same side along the length direction of the mobile platform, thereby forming a reliable protection structure at the two sides of the mobile platform and effectively preventing the falling of the construction equipment and workers on the mobile platform, so as to ensure the construction safety. The two ends of the mobile platform are the tower walls, which can ensure the construction safety to a certain extent, and the end portions of the two groups of railings can be connected by a cross link when necessary, so as to further reduce the safety risk of the construction. The stand columns and the railings can all adopt a hollow tubular structure (hollow steel pipe), and the installation of the stand columns and the railings can be divided into two cases.

[0061] When the column is only arranged in the length range of the main beam segment, the column can be connected with the railing after the column is normally erected (this is the case in the embodiment) ;

[0062] When the column is arranged not only on the main beam segment but also on the telescopic beam segment (one or more groups of columns are arranged on the telescopic beam segment), since the two ends of the moving platform are telescopic structures, the railing arranged at the telescopic joint of the moving platform is also a telescopic structure. Specifically, a single railing includes a main sleeve and a telescopic sleeve, the main sleeve is arranged above the non-telescopic structure of the moving platform, the telescopic sleeve is arranged above the telescopic structure of the moving platform, and the telescopic sleeve is located at the two ends of the main sleeve and is sleeved with the main sleeve. When the two ends of the moving platform are telescoped, the telescopic sleeve can slide relative to the main sleeve to adapt to the telescopic displacement. The above arrangement has better protection effect on the moving platform, and the position of the tension beam can be selected more, and the application range is wider (better adapt to the construction of cable tooth blocks of different sizes and angles). In addition, when the telescopic beam segment is additionally provided with a column, attention should be paid to that the arrangement interval of the column around the telescopic joint should not interfere with the whole moving range of the telescopic beam segment, that is, the column should not be arranged on the segment of the telescopic beam segment which is allowed to be retracted into the main beam segment.

[0063] In another technical scheme, the tension beam 8 and the corresponding two columns 2 are detachably connected. The arrangement position of the tension beam is determined by the structure of the cable tooth block, the position of the cable anchored on the cable tooth block, and the size of the selected tensioning tool. The tension beam at any construction position needs to meet the tensioning requirement of the cable at the corresponding height (tensioning angle) and not interfere with the cable tooth block, and the length of the tensioning tool itself also needs to be considered so that the tensioning equipment installed on the tension beam can be more convenient for the operator to operate. The detachable connection of the tension beam with multiple columns is beneficial to the operator to temporarily disassemble, replace and change the position of the tension beam according to the real-time change of the construction condition, so as to better adapt to different cable tooth block setting forms and perform rapid and high-quality construction.

[0064] In another technical solution, the mobile cable tower construction platform, the traction device includes a hand-operated hoist 14, a traction steel wire rope, a shackle, etc. The fixed end of the hand-operated hoist is arranged on the corresponding tensioning beam and is in sliding connection with the tensioning beam. The traction end is connected with the tensioning end of the tensioning tool. The clamping end of the tensioning tool is opposite to and abuts against the adjacent cable tensioning end. Specifically, during tensioning construction, tensioning needs to be strictly performed along the setting direction of the cable. Since the cable is anchored on the cable tooth block, the cable tensioning end is located on the anchoring surface of the cable tooth block, that is, the tensioning direction of the tensioning tool needs to be perpendicular to the cable anchoring surface on the cable tooth block. The tensioning end (shell) of the tensioning tool is connected with the traction steel wire rope of the hand-operated hoist. By adjusting the position of the hand-operated hoist on the tensioning beam and the length of the traction steel wire rope, the clamping end of the tensioning tool can be opposite to and abut against the cable tensioning end (that is, the anchoring end position of the cable on the cable tooth block) after being stably connected with the anchor head of the cable. Then, the tensioning tool is started, and the cable is tensioned according to the design requirement. During the tensioning process, the operator can manually assist in pressing the tensioning tool on the cable tooth block to avoid relative displacement of the tensioning tool. The traction end of the hand-operated hoist is provided with a traction steel wire rope and a shackle to realize the connection between the hand-operated hoist and the tensioning tool, and the position and tensioning direction (angle) of the tensioning tool can be accurately adjusted according to different cables and cable tooth blocks. The hand-operated hoist can adopt a conventional model. The fixed end of the hand-operated hoist is installed on the pre-set slide of the tensioning beam 8 through a sliding block 7. A limiting mechanism (or an electric sliding rail structure such as a linear guide rail) is arranged between the sliding block and the slide. After the position of the tensioning tool is aligned (with the cable tooth block), the sliding block and the slide can be relatively locked through the limiting mechanism to prevent the fixed end of the hand-operated hoist from being displaced during tensioning construction, thereby affecting the tensioning construction effect. Therefore, the accuracy of the tensioning construction is effectively ensured, and the construction quality is improved.

[0065] In another technical solution, the mobile cable tower internal construction platform, the lifting system comprises a winch lifting device, which comprises a hook 12 fixed on the top of the non-extensible structure of the mobile platform; a winch 11 arranged on the fixed structure at the top of the bridge tower and detachably connected with the hook 12 through a steel wire rope 22. Wherein, the lifting system comprises a conventional winch lifting device, in order to ensure the stability of lifting, the winch can be arranged as multiple winches, which are fixed on the top of the bridge tower and the projections on the mobile platform are relatively symmetrically distributed about the center line; corresponding to the multiple winches, the hook is arranged as multiple hooks, so that when the steel wire rope is retracted or extended by the winch, the multiple winches synchronously perform lifting operation, which can realize stable adjustment of the height of the mobile platform without changing the horizontal position, and the horizontal position of the mobile platform will not deviate due to uneven force on both sides, affecting the normal progress of subsequent construction. The multiple hooks are arranged on the non-extensible structure (i.e. the frame structure formed by the main beam section and the cross beam) of the mobile platform, avoiding the interference between the end extensible structure and the hook during the extension and contraction process, and the structural strength and stress structure of the non-extensible structure are relatively stable, which can further ensure the stability of lifting.

[0066] In another technical solution, the mobile cable tower internal construction platform, the lifting system further comprises a self-lifting device, which comprises two groups of oil cylinders 18, which are respectively arranged at the two ends of the mobile platform, and any group of oil cylinders is arranged along the bridge tower height direction, the fixed end of the oil cylinder 18 is arranged at the support seat 13 adjacent to the support seat supporting the mobile platform and is detachably connected with the support seat, and the pushing end is fixedly connected with the mobile platform. Specifically, the lifting system is further provided with a self-lifting device, and any group of oil cylinders can comprise a plurality of oil cylinders, which are correspondingly arranged with a plurality of support seats at the same height position on the adjacent tower wall, and any oil cylinder is installed between the mobile platform and the support seat above / below the mobile platform (i.e. the support seat adjacent to the support seat supporting the mobile platform). In the present embodiment, the oil cylinder is arranged 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 by a suitable distance as a whole. The oil cylinder is installed at the outer end of the telescopic structure of the mobile platform, and the in-situ upward movement of the mobile platform can be realized without telescoping at the end of the mobile platform. Compared with the lifting mode by the winch, the rigid connection structure between the oil cylinder and the mobile platform (the steel wire rope between the winch and the mobile platform is a flexible connection), which can better guarantee the stability and safety of the mobile platform during height adjustment, and the mobile platform is not easily affected by external environmental factors to cause shaking, displacement and other problems, but the end of the mobile platform cannot be telescoped to avoid the inherent structure (cable stay tooth block, support seat above, etc.) on the tower wall under this connection structure. Therefore, after the mobile platform is lifted a distance by the self-lifting device, the winch lifting device needs to be switched to continue lifting the mobile platform, so that the mobile platform can finally move to above the support seat of the upper layer and be stably supported on the support seat of the layer after telescoping adjustment. During the lifting of the mobile platform by the oil cylinder, in order to further guarantee the accuracy and stability of the lifting direction, one or more limit blocks 17 can be arranged on the tower wall adjacent to the oil cylinder, which is 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 upward, the cylinder body abuts against the side wall of the limit block and slides relative to the side wall, so as to limit the displacement or vibration of the pushing end of the oil cylinder in the horizontal direction, so as to guarantee that the oil cylinder can stably jack along the vertical direction during work, and the working stability of the oil cylinder itself 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 both ends through the oil cylinder pipeline 19, and the control unit can be integrated in the control system 20 matched with the mobile platform, which is uniformly configured and adjusted by the operator to realize real-time regulation and control of the self-lifting device.

[0067] The application further provides a mobile cable tower internal construction method, comprising:

[0068] S1, a plurality of groups of support seats 13 are arranged on the opposite two tower walls 6, which are arranged at intervals along the height direction of the bridge tower, and the cable tooth blocks 1 are located between adjacent two groups of support seats 13, any group of support seats includes a plurality of support seats which are arranged at intervals along the width direction of the bridge tower and are pre-buried on the corresponding tower wall, then the movable cable-in-tower construction platform is assembled and the mobile platform is hoisted to the initial construction position by using the winch lifting device;

[0069] S2, the two telescopic beam segments 24 are driven to slide outward by the power mechanism, so that the two distribution beams 21 respectively abut against the adjacent tower walls 6 and are supported on the corresponding group of support seats 13, and then the connection between the winch lifting device and the mobile platform is released;

[0070] S3, the cable 15 anchored above the corresponding support seat at the cable tooth block is tensioned by using the traction device in cooperation with the tensioning tool 16;

[0071] S4, after the tensioning construction is completed, the mobile platform is moved to the next construction position by using the winch lifting device and the self-lifting device, and during the movement, the displacement of the two telescopic beam segments 24 is controlled by the power mechanism, so that the mobile platform does not interfere with the cable tooth block 1 or the support seat 13;

[0072] S5, the steps of S2-S4 are repeated until the cable tensioning and other constructions (such as tower crack and defect repair, cable anchor corrosion prevention treatment, etc.) in the whole height range are completed.

[0073] In the embodiment, the same group of support seats on the same tower wall includes two support seats which are arranged at intervals and correspond to the two sides of the mobile platform respectively; correspondingly, in the self-lifting device of the mobile platform, the same group of oil cylinders includes two oil cylinders which are fixed at the two ends of the distribution beam of the mobile platform, and after the distribution beam moves outward and is erected on a group of support seats, the oil cylinders are just located above the corresponding support seats. In the initial state, the oil cylinders are located between adjacent two groups of support seats, and after the oil cylinder pushing end is pushed outward, the top end (fixed end) of the oil cylinder can move upward along the vertical direction to abut against the upper support seat, and after the fixed end of the oil cylinder is fixedly connected with the support seat, the connection of the self-lifting device is completed. The connection of the self-lifting device can be performed before the tensioning of the cable at the current position, so as to further improve the stability of the mobile platform between the two tower walls during the cable tensioning construction, and the impact force during the construction is evenly distributed to different support seats and tower walls, the rationality of the stressed structure is improved, and the deformation of the support seat is prevented.

[0074] In the above technical solution, in S4, when the mobile platform is moved to the next construction position by using the winch lifting device and the self-lifting device, there are two moving conditions:

[0075] When moving from the lower construction position to the upper construction position:

[0076] S41, fixing the fixed end of each oil cylinder in the self-lifting device on a set of support seats located above, then controlling the oil cylinder to retract, lifting the moving platform from the current construction position 26 to the intermediate position 27 until the moving platform (the top surface of the distribution beam) interferes with the cable-stayed cable tooth block;

[0077] S42, connecting the steel wire rope of the winch lifting device with the hook on the top of the moving platform and tightening the steel wire rope to perform the load bearing system conversion (completely transferring the gravity of the moving platform from the support seat to the steel wire rope of the winch);

[0078] S43, then releasing the connection between the oil cylinder and the support seat above, driving the two telescopic beam segments to retract inwardly to avoid the cable-stayed cable tooth block at this position by the power mechanism, and then using the winch lifting device to continue to vertically lift the moving platform from the intermediate position 27 to the next construction position 28 (the top of the support seat located above).

[0079] When moving from the construction position above to the construction position below:

[0080] T41, connecting the steel wire rope of the winch lifting device with the hook on the top of the moving platform and tightening the steel wire rope to perform the load bearing system conversion (completely transferring the gravity of the moving platform from the support seat to the steel wire rope of the winch), then releasing the connection between the oil cylinder and the support seat above, driving the two telescopic beam segments to retract inwardly to avoid the support seat at this position by the power mechanism, and then using the winch lifting device to vertically lower the moving platform to the bottom of the cable-stayed cable tooth block located below (the relative length of the telescopic beam segments can be adjusted in real time during the lowering process to avoid the cable-stayed cable tooth block);

[0081] T42, driving the two telescopic beam segments to slide outwardly to make the two distribution beams respectively abut against the adjacent tower wall, then fixing the fixed end of each oil cylinder in the self-lifting device on a set of support seats located above and performing the load bearing system conversion (completely transferring the gravity of the moving platform from the steel wire rope of the winch to the support seat);

[0082] T43, releasing the connection between the winch lifting device and the moving platform, then controlling the oil cylinder to push outwardly, and stably lowering the moving platform to the support seat located below.

[0083] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A mobile construction platform within a cable tower, characterized in that, The bridge tower construction method comprises the following steps: a mobile platform is arranged between two opposite tower walls along the length direction of the bridge tower, two ends of the mobile platform are telescopic structures and are respectively supported on the top of support seats embedded in the two tower walls; a plurality of groups of vertical columns are arranged along the length direction of the mobile platform, any group of vertical columns comprises two vertical columns which are arranged opposite to each other on the two sides of the mobile platform and are fixed on the top of the vertical columns; two tension beams are arranged on two groups of vertical columns in the plurality of groups of vertical columns, any tension beam is connected to the top of the corresponding two vertical columns; two tension devices are arranged on the two tension beams, any tension device comprises a tension tool arranged on the corresponding tension beam and used for tensioning a stay cable, and a traction device arranged between the tension tool and the tension beam and used for adjusting the tension position and tension direction of the tension tool; a lifting system is arranged on the bridge tower and used for adjusting the height position of the mobile platform, the lifting system comprises a winch lifting device comprising a hook fixed on the top of the non-telescopic structure of the mobile platform; a winch is arranged on a fixed structure on the top of the bridge tower and is detachably connected to the hook through a steel wire rope; a self-lifting device comprises two groups of oil cylinders which are respectively arranged at the two ends of the mobile platform, any group of oil cylinders is arranged along the height direction of the bridge tower, the fixed end of the oil cylinder is arranged at a support seat adjacent to the support seat supporting the mobile platform and is detachably connected to the support seat, and the jacking end is fixedly connected to the mobile platform; The mobile platform comprises a platform frame which comprises: a plurality of longitudinal beams are arranged along the width direction of the bridge tower, any longitudinal beam is arranged along the length direction of the bridge tower and comprises a main beam segment which is a hollow structure penetrating along the axial direction, and two telescopic beam segments which are respectively sleeved on the two ends of the main beam segment and slide along the length direction of the main beam segment under the driving of a power mechanism; a plurality of transverse beams are arranged along the length direction of the bridge tower, any transverse beam is fixedly connected to the main beam segments of the plurality of longitudinal beams along the width direction of the bridge tower; two distribution beams are arranged corresponding to the two telescopic beam segments, any distribution beam is connected to the outer end portions of the plurality of telescopic beam segments on the same end of the plurality of longitudinal beams and is supported on the corresponding support seat.

2. The mobile construction platform with cable towers as claimed in claim 1, characterized in that The plurality of groups of vertical columns correspond to the plurality of transverse beams one by one, the two vertical columns of any group of vertical columns are respectively fixed on the two ends of the corresponding transverse beam through a supporting leg.

3. The mobile construction platform with cable towers as claimed in claim 1, characterized in that The mobile platform further comprises a platform panel laid on the top of the platform frame, the platform panel comprises a main panel laid on the top of the frame structure composed of the main beam segments and the corresponding transverse beams, and two telescopic panels which are respectively arranged at the two ends of the main panel and are slidably connected to the main panel, any telescopic panel is laid on the top of the frame structure composed of the distribution beam and the telescopic beam segment on the same end.

4. The mobile cable tower construction platform of claim 1, wherein, Further comprising two groups of railings which are respectively arranged on the vertical columns on the two sides of the mobile platform, any group of railings is connected to the plurality of vertical columns on the same side along the length direction of the mobile platform.

5. The mobile cable tower construction platform of claim 1, wherein, The tension beam is detachably connected to the corresponding two vertical columns.

6. The mobile cable tower construction platform of claim 1, wherein, The traction device comprises a hand chain block, a fixed end of which is arranged on the corresponding tension beam and is in sliding connection with the tension beam, and a traction end of which is connected with the tension end of the tensioning tool; the clamping end of the tensioning tool is in opposite abutment with the adjacent cable-stayed cable tension end.

7. A mobile construction method of a cable tower, which uses the mobile construction platform of any one of claims 1 to 6, characterized in that, Comprise: S1, a plurality of groups of support seats are arranged on the opposite two tower walls respectively, which are arranged in the height direction of the bridge tower, the cable tooth blocks are located between the adjacent two groups of support seats, any group of support seats comprises a plurality of support seats which are arranged in the width direction of the bridge tower and are pre-buried on the corresponding tower wall, then the movable cable tower internal construction platform is assembled and the mobile platform is hoisted to the initial construction position by using the hoist lifting device; S2, the two telescopic beam segments are driven to slide outward by the power mechanism, so that the two distribution beams are in abutment with the adjacent tower walls and are supported on the corresponding group of support seats, then the connection between the hoist lifting device and the mobile platform is released; S3, the cable-stayed cables anchored at the cable tooth blocks above the corresponding support seats are tensioned by using the traction device in cooperation with the tensioning tool; S4, after the tensioning construction is completed, the mobile platform is moved to the next construction position by using the hoist lifting device and the self-lifting device, in the moving process, the displacement of the two telescopic beam segments is controlled by the power mechanism, so that the mobile platform does not interfere with the cable tooth blocks or the support seats; S5, the steps of S2-S4 are repeated until the cable-stayed cable tensioning and other constructions in the whole height range are completed.

Images