Method for dismantling a tower for bridge construction and vertical rotation system thereof

Abstract

The application relates to a tower dismantling method for bridge construction, a vertical rotating system thereof, a posture adjusting device and a moving supporting assembly. The posture adjusting device comprises a combined hinge base assembly and a tensioning assembly. Since the tower is installed on the bridge through the tensioning assembly and the combined hinge base assembly of the posture adjusting device, the stability of the tower during normal use can be ensured while the tower is prevented from being unstable during in-situ dismantling; then the tensioning degree of the tensioning assembly is adjusted, so that the tower can be rotated and placed on the moving supporting assembly in an inclined manner; the tower can be moved from one end of the bridge with a road to the other end through the moving supporting assembly, and then the tower is hoisted and dismantled; through the above structure, the tower is moved from the bridge with a road to the other end through the posture adjusting device and the moving supporting assembly, so that the influence caused by hoisting during road closure is avoided.

Description

Technical Field

[0001] The present application relates to the field of continuous beam bridge construction, and in particular to a method for dismantling a tower used in bridge construction and a vertical rotation system thereof. Background Art

[0002] At present, prefabricated bridge technology is increasingly widely used in the construction of modern urban transportation projects. It is adopted in a large number of designs due to its novel structure, fast construction and economical cost.

[0003] In urban areas, construction often involves crossing existing obstacles such as roads, railways, and rivers. Due to the generally large spans, a variety of bridge types are available, including prestressed concrete continuous beams, steel box beams, cable-stayed bridges, suspension bridges, and arch bridges. In terms of economy, schedule, safety, and construction environment, steel beams offer significant advantages due to their minimal weight and ease of assembly.

[0004] This design scheme is adopted after the steel beam is completed in the tower inclined pulling and pushing construction. Conventional span construction usually closes the existing traffic and uses large lifting equipment to dismantle the tower, but there are the following problems:

[0005] For urban main roads with heavy traffic, closing traffic is not a feasible option. At the same time, the crane equipment station requires renting additional space outside the red line, which increases construction costs. Not only is the safety risk high, but the economic and social benefits are also undesirable.

[0006] As far as the dismantling construction of the cable-stayed tower on the steel-concrete composite beam with variable height section is concerned, how to balance the economic and social benefits is an issue that needs to be solved urgently. Summary of the Invention

[0007] The embodiments of the present application provide a method for dismantling a tower for bridge construction and a vertical rotation system thereof, so as to solve the problem in the related art of how to dismantle a tower without affecting existing traffic.

[0008] In a first aspect, a vertical rotation system for a tower for bridge construction is provided, comprising:

[0009] The posture adjustment device includes a combined hinge assembly and a tensioning assembly; the combined hinge assembly is arranged along the longitudinal direction of the bridge, and has a first connection portion at the bottom for connecting to the bridge, and a second connection portion at the top for connecting to the tower; the tensioning assembly is located on both sides of the combined hinge assembly in the longitudinal direction of the bridge, and has a tower top connection portion and a bridge connection portion;

[0010] The movable supporting assembly is located on the side of the combined hinge assembly on the longitudinal bridge upward and away from the existing road; the movable supporting assembly is used to support the tower after being adjusted by the posture adjusting device and move upward on the longitudinal bridge of the bridge.

[0011] In some embodiments, the combined hinge assembly includes:

[0012] a first upper hinge seat, which is located on a first transverse axis, the first transverse axis extending in the transverse direction of the bridge and passing through the center of a side edge of the tower bottom in the longitudinal direction of the bridge; the first upper hinge seat is hingedly connected to the first lower hinge seat via a first hinge axis;

[0013] a second upper hinge seat, which is located on a second transverse axis extending in the transverse direction of the bridge and located on one end of a side edge of the tower bottom in the longitudinal direction of the bridge; the second upper hinge seat is hingedly connected to the second lower hinge seat via a second hinge axis;

[0014] The first connecting portion is located on the first lower hinge seat and the second lower hinge seat; the second connecting portion is located on the first upper hinge seat and the second upper hinge seat.

[0015] In some embodiments, the combined hinge assembly includes:

[0016] a first upper hinge seat, which is located on a first transverse axis, the first transverse axis extending in the transverse direction of the bridge and passing through the center of a side of the tower bottom in the longitudinal direction of the bridge;

[0017] a second upper hinge seat, which is located on a second transverse axis, the second transverse axis extending in the transverse direction of the bridge and located at one end of a side of the tower bottom in the longitudinal direction of the bridge;

[0018] The common lower hinge seat is selectively hinged to the first upper hinge seat and the second upper hinge seat through a common hinge shaft;

[0019] The first connecting portion is located on the common lower hinge seat; the second connecting portion is located on the first upper hinge seat and the second upper hinge seat.

[0020] In some embodiments, the tensioning assembly includes:

[0021] The steel strand is provided with an anchor cup with lugs and a tension rod at both ends;

[0022] A through-hole jack is connected to the top of the tower through a tower top reaction seat; the tower top connection portion is provided on the tower top reaction seat; a tension rod passes through the through-hole jack and is connected to the telescopic end of the through-hole jack;

[0023] An anchor beam is connected to the anchor cup with ear plate through a fork ear; the bridge connection portion is provided on the anchor beam, and the anchor beam is used to extend along the transverse direction of the bridge and is provided on the bridge.

[0024] In some embodiments, the base of the through-hole jack is connected to the tower top reaction seat via a support leg;

[0025] The top counterforce seat is provided with an inner and outer threaded anchor cup, which is fixedly connected with the top counterforce seat through a fixing anchor in the supporting leg.

[0026] In some embodiments, the mobile support assembly comprises:

[0027] The tire rack vehicle is provided with a support and fixing structure.

[0028] The rollers are arranged at the bottom of the tire rack vehicle.

[0029] In some embodiments, the support and fixing structure comprises a plurality of support rods arranged vertically and spaced along the longitudinal direction of the bridge, the support rods being used to connect with the tower; the heights of the plurality of support rods are not equal, the top of a part of the support rods being located on a first straight line, and the top of the remaining support rods being located on a second straight line, the first straight line and the second straight line forming a space for accommodating the tower.

[0030] In some embodiments, the track arranged along the longitudinal direction of the bridge is further included.

[0031] The tire rack vehicle is provided with an L-shaped limiting piece on each side of the roller, the L-shaped limiting pieces on the two sides forming a limiting space, the top of the track being in contact with the bottom of the roller and located in the limiting space.

[0032] In a second aspect, a method for removing a tower for bridge construction is provided, which comprises the following steps:

[0033] A vertical rotation system for removing a tower for bridge construction is provided.

[0034] An attitude adjusting device is installed on the tower to enable the tower to be installed on the bridge to complete the vertical rotation preparation step.

[0035] The tensioning assembly on the end of the bridge away from the existing road is removed, and the tensioning degree of the tensioning assembly is adjusted to enable the tower to rotate around the combined hinge assembly and be placed on the mobile support assembly.

[0036] The remaining tensioning assembly is removed, and the mobile support assembly is moved by using a traction device.

[0037] When the mobile support assembly is moved to the end of the bridge away from the existing road, the tower is hoisted to the ground to complete the removal.

[0038] In some embodiments, the combined hinge assembly includes: a first upper hinge, which is located on a first transverse axis, the first transverse axis extending along the transverse direction of the bridge and passing through the center of the side of the tower bottom in the longitudinal direction of the bridge; the first upper hinge is hingedly connected to the first lower hinge via a first hinge axis; a second upper hinge is located on a second transverse axis, the second transverse axis extending along the transverse direction of the bridge and located at one end of the side of the tower bottom in the longitudinal direction of the bridge; the second upper hinge is hingedly connected to the second lower hinge via a second hinge axis;

[0039] Adjusting the tensioning degree of the tensioning components on both sides of the longitudinal bridge to make the tower rotate around the combined hinge assembly includes the following steps:

[0040] Retracting the tensioning assembly at the end of the longitudinal bridge of the bridge away from the existing road, extending the tensioning assembly at the end of the transverse bridge of the bridge upward to the end of the road, and rotating the tower around the first hinge axis to a first design angle;

[0041] Remove the connection between the first lower hinge seat and the bridge, and connect the second lower hinge seat to the bridge; then retract the longitudinal bridge of the bridge upward away from the tensioning assembly at the end where the road is located, stretch the longitudinal bridge of the bridge upward toward the tensioning assembly at the end where the road is located, and rotate the tower to the second design angle around the second hinge axis.

[0042] The beneficial effects of the technical solution provided by this application include:

[0043] The embodiment of the present application provides a method for dismantling a tower for bridge construction and a vertical rotation system thereof, because the tower is installed on the bridge by the tensioning assembly and the combined hinge assembly of the posture adjustment device, the tower is prevented from becoming unstable when dismantled in situ, and the stability of the tower during normal use can also be guaranteed; then the tensioning degree of the tensioning assembly is adjusted so that the tower can be rotated, so that the tower can be placed obliquely on the mobile support assembly, and the tower can be moved from the longitudinal bridge upward, that is, one end of the bridge with a road to the other end, and then the tower is dismantled by hoisting; through the above structural setting, the posture adjustment device and the mobile support assembly are used to move the tower from the bridge side with a road to the other end, avoiding the impact caused by hoisting on the closed road. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1 A schematic diagram of a state of a vertical rotation system of a tower for bridge construction provided in an embodiment of the present application in a preparation step;

[0046] Figure 2 A state diagram of the tower vertical rotation system for bridge construction provided by the embodiment of the present application in the first rotation state;

[0047] Figure 3 A state diagram of the tower vertical rotation system for bridge construction provided by the embodiment of the present application in the second rotation state;

[0048] Figure 4 A state diagram of the tower vertical rotation system for bridge construction provided by the embodiment of the present application in the second rotation state;

[0049] Figure 5 A structure diagram of the first upper hinge, the first lower hinge and the first hinge shaft of the combined hinge assembly provided by the embodiment of the present application;

[0050] Figure 6 A structure diagram of the tensioning assembly provided by the embodiment of the present application;

[0051] Figure 7 A structure diagram of the connection between the bottom of the jig car and the track provided by the embodiment of the present application;

[0052] Figure 8 A structure diagram of the tower provided by the embodiment of the present application.

[0053] In the figure: 1, attitude adjusting device; 100, combined hinge assembly; 1001, first upper hinge; 1002, first hinge shaft; 1003, first lower hinge; 1004, second upper hinge; 1005, second hinge shaft; 1006, second lower hinge; 101, tensioning assembly; 1011, steel strand; 1012, anchor cup with lug plate; 1013, tensioning rod; 1014, through-center jack; 1015, tower top counterforce seat; 1016, anchor beam; 1017, fork lug; 1018, supporting leg; 1019, fixed anchor; 10110, inner and outer threaded anchor cup; 2, tower; 200, stand column; 201, connecting system; 202, column foot; 203, transverse distribution beam; 204, longitudinal distribution beam; 205, working platform; 3, track; 4, mobile supporting assembly; 400, jig car; 401, supporting and fixing structure; 402, roller; 403, L-shaped limiting piece; 5, cushion block. DETAILED DESCRIPTION

[0054] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0055] Since the steel beams need to be dismantled after the tower is tilted and pushed, closing the traffic is not a feasible option for the main roads in the urban area with busy traffic (i.e., existing roads). At the same time, the crane equipment needs to rent an additional site outside the red line, which increases the construction cost. Not only is the safety risk high, but the economic and social benefits are also undesirable. Therefore, a vertical rotation system for the tower for bridge construction is provided, which can ensure the installation stability of the tower when the tower is in use; when the tower is dismantled, it can solve the problems of difficulty in dismantling the tower in situ and instability of the tower due to vertical rotation, and can dismantle the tower without affecting the existing traffic.

[0056] The embodiments of the present application provide a method for dismantling a tower for bridge construction and a vertical rotation system thereof, which can solve the problem in the related art of how to dismantle the tower without affecting existing traffic.

[0057] A vertical rotation system of a tower for bridge construction, comprising: an attitude adjustment device 1 and a movable support assembly 4;

[0058] The posture adjustment device 1 includes a combined hinge assembly 100 and a tensioning assembly 101; the combined hinge assembly 100 is arranged along the longitudinal direction of the bridge, and has a first connection portion at its bottom for connecting to the bridge, and a second connection portion at its top for connecting to the tower 2; the tensioning assembly 101 is located on both sides of the combined hinge assembly 100 in the longitudinal direction of the bridge, and has a tower top connection portion and a bridge connection portion; a movable supporting assembly 4 is located on the side of the combined hinge assembly 100 in the longitudinal direction of the bridge away from the existing road; the movable supporting assembly 4 is used to support the tower 2 adjusted by the posture adjustment device 1, and move in the longitudinal direction of the bridge.

[0059] Since the tower 2 is installed on the bridge through the tensioning assembly 101 and the combined hinge assembly 100 of the attitude adjustment device 1, the tower 2 is prevented from becoming unstable when being dismantled in situ, and the stability of the tower during normal use can also be guaranteed; then the tensioning degree of the tensioning assembly 101 is adjusted so that the tower 2 can be rotated, so that the tower 2 can be placed obliquely on the mobile support assembly 4, and the tower 2 can be moved from the longitudinal bridge upper bridge, that is, one end of the road to the other end of the bridge, and then dismantled by hoisting the tower; through the above structural setting, the attitude adjustment device 1 and the mobile support assembly 4 are used to move the tower 2 from the bridge side, that is, the road side, to the other end, avoiding the impact of hoisting on the closed road, thereby overcoming the difficulty of not being able to support lifting equipment in the middle of the span.

[0060] It should be understood that the tower 2 is located above the existing traffic on the bridge, and the construction area is located at the end of the bridge that is upward and away from the existing traffic. This eliminates the need to spend extra money to rent equipment and does not affect normal traffic on the existing road. When the tower 2 is in use, the tensioning assembly 101 cooperates with the combined hinge assembly 100 to make the tower 2 perpendicular to the bridge. Then, a pad 5 is installed at the bottom of the tower 2 to make the installation of the tower 2 more stable, so that the device of the present application has a dual function, which is effective both when the tower is disassembled and when it is used. The number of combined hinge assemblies 100 can be multiple and spaced apart along the transverse direction of the bridge; the number of tensioning assemblies 101 can be multiple and spaced apart along the transverse direction of the bridge.

[0061] In some preferred embodiments, reference Figure 1-5 Since the bottom of the tower 2 has a certain width in the longitudinal direction of the bridge, the angle of rotation of the tower 2 during actual rotation is relatively small and it cannot be directly tilted and placed on the mobile support assembly 4. Therefore, the following settings are made:

[0062] The first structure

[0063] The combined hinge assembly 100 includes: a first upper hinge 1001, located on a first transverse axis extending in the transverse direction of the bridge and passing through the center of the longitudinal side of the bottom of the tower 2; the first upper hinge 1001 is hingedly connected to a first lower hinge 1003 via a first hinge shaft 1002; a second upper hinge 1004, located on a second transverse axis extending in the transverse direction of the bridge and located at one end of the longitudinal side of the bottom of the tower 2; the second upper hinge 1004 is hingedly connected to a second lower hinge 1006 via a second hinge shaft 1005. The first connecting portion is located on the first lower hinge 1003 and the second lower hinge 1006; the second connecting portion is located on the first upper hinge 1001 and the second upper hinge 1004.

[0064] When the structure is used, the first lower hinge base 1003 is first fixedly connected with the bridge, and then the tower 2 is rotated by an angle about the first hinge shaft 1002, which can be 5 degrees. Then the first lower hinge base 1003 is detached from the bridge, and then the second lower hinge base 1006 is connected with the bridge, so that the tower 2 is rotated by an angle about the second hinge shaft 1005, which can be 10 degrees.

[0065] The second structure

[0066] The combined hinge base assembly 100 comprises a first upper hinge base 1001 located on a first horizontal shaft extending along the transverse direction of the bridge and passing through the center of the side edge of the bottom of the tower 2 in the longitudinal direction of the bridge, a second upper hinge base 1004 located on a second horizontal shaft extending along the transverse direction of the bridge and located on one end of the side edge of the bottom of the tower 2 in the longitudinal direction of the bridge, i.e. also on the end close to the moving support assembly 4 in the longitudinal direction of the bridge, and a shared lower hinge base selectively hinged with the first upper hinge base 1001 and the second upper hinge base 1004 through a shared hinge shaft. A first connecting part is located on the shared lower hinge base, and a second connecting part is located on the first upper hinge base 1001 and the second upper hinge base 1004.

[0067] When the structure is used, the first upper hinge base 1001 is first connected with the shared lower hinge base, the shared lower hinge base is connected with the bridge, and then the shared hinge shaft is rotated by 5 degrees. Then the shared lower hinge base is detached from the bridge, and then the shared lower hinge base is connected with the second upper hinge base 1004, so that the tower 2 is rotated by 10 degrees about the shared hinge shaft, which overcomes the problem of small single rotation angle of the tower.

[0068] The above two methods can be selected and used as needed to facilitate the vertical rotation construction of the tower. It can also be understood that the first hinge shaft 1002, the second hinge shaft 1005 and the shared hinge shaft extend along the transverse direction of the bridge, and the number of the first upper hinge base 1001 and the second upper hinge base 1004 is multiple and is arranged at intervals along the transverse direction of the bridge.

[0069] In some preferred embodiments, with reference to Figure 5 The structure of the tensioning assembly 101 is specifically described as follows:

[0070] The tensioning assembly 101 comprises a steel strand 1011, both ends of which are respectively provided with an ear plate anchor cup 1012 and a tensioning rod 1013; a through jack 1014 connected with the top of the tower 2 through a tower top counterforce base 1015; a tower top connecting part provided on the tower top counterforce base 1015; the tensioning rod 1013 passes through the through jack 1014 and is connected with the telescopic end of the through jack 1014; an anchor beam 1016 connected with the ear plate anchor cup 1012 through a fork ear 1017; and a bridge connecting part provided on the anchor beam 1016, the anchor beam 1016 being used for extending along the transverse direction of the bridge and being arranged on the bridge.

[0071] Each tensioning assembly 101 is equipped with at least two steel strands 1011, and the steel beam must be connected to the top of the tower 2 via the steel strands 1011 at both the mid-span and side piers. In this embodiment, anchor beams 1016 are welded to the mid-span and side piers of the steel beam for connection of the steel strands 1011. The telescopic end of the through-hole jack 1014 is threadedly connected to the tensioning rod 1013 via a tool anchor.

[0072] When in use, the tensioning assembly 101 is installed according to the following structure, and then the tensioning rod 1013 is moved by the telescopic end of the through-core jack 1014 to adjust the tensioning degree of the steel strand 1011, so that the tower 2 can be offset.

[0073] For further reference, Figure 6 In order to facilitate the laying out of the steel strand 1011 and guide the steel strand 1011, the following settings are made:

[0074] The base of the through-hole jack 1014 is connected to the tower top reaction seat 1015 through the support leg 1018; the tower top reaction seat 1015 is provided with an internal and external threaded anchor cup 10110, and the internal and external threaded anchor cup 10110 is fixedly connected to the tower top reaction seat 1015 through a fixed anchor 1019 located in the support leg 1018; the internal and external threaded anchor cup 10110 is provided with a guide channel for the steel strand 1011 to pass through.

[0075] The tensioning rod 1013 passes through the through-hole jack 1014 and is bolted to a tool anchor. The tool anchor restricts the tensioning rod 1013 from being separated from the through-hole jack 1014, and after the tensioning rod 1013 is connected to the steel strand 1011, the pressure of the through-hole jack 1014 is transferred to the steel strand 1011 through the tensioning rod 1013; the steel strand 1011 passes through the tower top reaction seat 1015 and is connected to the tensioning rod 1013. Specifically, the internal and external threaded anchor cup 10110 is sleeved on the tension rod 1013 and threadedly assembled with the tension rod 1013. The internal and external threaded anchor cup 10110 is bolted with a fixed anchor 1019. The fixed anchor 1019 is supported on the tower top reaction seat 1015. In order to provide installation space for the fixed anchor 1019, a support leg 1018 is installed on the tower top reaction seat 1015. The support leg 1018 and the tower top reaction seat 1015 form an accommodating space for the fixed anchor 1019. The through-hole jack 1014 is installed on the support leg 1018. Through the above arrangement, the through-hole jack 1014 can be used to adjust the length of the steel strand 1011 to achieve a suitable rotation angle, thereby improving the fit between the tower frame 2 and the mobile support assembly 4.

[0076] The inner and outer threaded anchor cup 10110 is internally provided with a guide channel for the steel strand 1011 to pass through, so that the steel strand 1011 can be guided, and the part entering the through jack 1014 can be coaxial with the tension rod 1013. The anchor cup with an ear plate 1012, the steel strand 1011 and the inner and outer threaded anchor cup 10110 are custom-made parts, and are assembled as a whole in a professional project.

[0077] In some preferred embodiments, with reference to Figure 8 , the tower 2 includes a plurality of columns 200 distributed along the longitudinal and transverse directions of the steel beam, the columns 200 are connected by a connecting system 201 to form an overall structure, the connecting system 201 is composed of a plurality of steel pipes and is welded and fixed with the columns 200 by intersecting lines; a column foot 202 is used for reinforcement and reinforcement at the bottom of the column 200, and a transverse distribution beam 203 is installed at the top of the column 200, the transverse distribution beam 203 is arranged along the transverse direction, and the transverse distribution beam 203 is arranged along the longitudinal direction. The transverse distribution beam 203 is provided with a plurality of longitudinal distribution beams 204 along the longitudinal direction, and the plurality of longitudinal distribution beams 204 are arranged along the transverse direction, and then a working platform 205 is installed on the longitudinal distribution beam 204. Through the above setting, the construction of the tower 2 is formed by welding connection of steel pipes and distribution beams, which is convenient for construction on site according to actual needs.

[0078] In some preferred embodiments, with reference to Figure 1 , 2 and Figure 7 , the structure of the mobile support assembly 4 and the convenience of moving the mobile support assembly 4 on the bridge are as follows:

[0079] The mobile support assembly 4 includes a jig trolley 400, which is provided with a support and fixing structure 401; a roller 402 is arranged at the bottom of the jig trolley 400; the arrangement of the roller 402 facilitates movement.

[0080] Further, in order to facilitate the connection of the tower 2 and the mobile support assembly 4, the support and fixing structure 401 includes a plurality of support rods arranged vertically and spaced along the longitudinal direction of the bridge, and the support rods are used to connect with the tower 2; the heights of the plurality of support rods are not equal, and the top of a part of the support rods is located on a first straight line, and the top of the remaining support rods is located on a second straight line, and the first straight line and the second straight line form a space for accommodating the tower 2. When placed, the tower 2 is located in the space and connected by the support rods. Among them, the included angle between the first straight line and the second straight line can be set according to needs, which is convenient for subsequent hoisting.

[0081] Further, in order to avoid the tower 2 from rolling over during movement, the following settings are made:

[0082] Further, in order to avoid the tower 2 from rolling over during movement, the following settings are made:

[0083] On the tire frame vehicle 400, L-shaped limit members 403 are provided on both sides of each roller 402. The L-shaped limit members 403 on both sides form a limit space. The top of the track 3 and the bottom of the roller 402 are in contact and located in the limit space.

[0084] Specifically, there are multiple rails 3 and a tire frame car 400, and the multiple rails 3 are fixed to the steel beam by welding. The single rail 3 extends along the longitudinal direction of the bridge and is arranged at intervals along the transverse direction of the bridge; the tire frame car 400 is formed by welding steel sections, and the roller 402 is provided at the bottom of the tire frame car 400 and can slide along the rail 3. L-shaped limit members 403 are connected to both sides of the roller 402, and the L-shaped limit members 403 are welded and fixed to the tire frame car 400. The rolling assembly with the rail 3 is realized through the two L-shaped limit members 403, and the tire frame car 400 is restricted from being separated from the rail 3.

[0085] By adopting the slot-type design measures of the tire frame vehicle 400 and the track 3, the problem of longitudinal movement of the tower is solved, the construction safety risk is reduced, and the impact on existing social traffic is minimized.

[0086] The present application also proposes a method for dismantling a tower for bridge construction, which comprises the following steps:

[0087] Step 1: raising the vertical rotation system of the tower for bridge construction;

[0088] Step 2: Install the attitude adjustment device 1 on the tower 2 so that the tower 2 can be installed on the bridge, and set a pad 5 at the bottom of the tower 2 to complete the vertical rotation preparation step;

[0089] Step 3: Remove the pad 5 and the tensioning assembly 101 on the end of the bridge longitudinal bridge that is upward and away from the road, adjust the tensioning degree of the tensioning assembly 101, rotate the tower 2 around the combined hinge assembly 100, and place it on the mobile support assembly 4;

[0090] Step 4: Remove the remaining tensioning components 101 and use the traction equipment to move the movable support component 4;

[0091] Step 5. When the mobile supporting assembly 4 moves to the end of the bridge longitudinal bridge upward and away from the existing road, use the lifting equipment to lift the tower 2 and lift the tower 2 to the ground; remove the track 3, and use the lifting equipment to dismantle the tire frame car 400, track 3 and temporary construction components in turn, restore the original appearance of the steel beam to complete the demolition; finally, complete the demolition construction.

[0092] The above traction equipment and lifting equipment are equipment in the relevant technology and will not be explained in detail.

[0093] Furthermore, adjusting the tensioning degree of the tensioning assemblies 101 on both sides of the longitudinal bridge so that the tower 2 rotates around the combined hinge assembly 100 includes the following steps:

[0094] Retract the tensioning assembly 101 of the longitudinal bridge upward away from the end where the road is located, extend the tensioning assembly 101 of the transverse bridge upward where the road is located, and rotate the tower 2 around the first hinge shaft 1002 to a first design angle;

[0095] Remove the connection between the first lower hinge seat 1003 and the bridge, and connect the second lower hinge seat 1006 to the bridge; then retract the longitudinal bridge of the bridge upward away from the tensioning assembly 101 at the end where the road is, stretch the longitudinal bridge of the bridge upward toward the tensioning assembly 101 at the end where the road is, and rotate the tower 2 to the second design angle with the second hinge shaft 1005 as the center.

[0096] Through the above settings, the tower 2 is smoothly rotated vertically onto the tire frame vehicle 400 through the quota of the tensioning component 101 and the combined hinge assembly 100 and the conversion of the hinge twice, which solves the problem of the small single rotation angle of the tower 2 and ensures the vertical rotation accuracy and safety of the tower 2.

[0097] This application has the following advantages:

[0098] 1. During the construction process of the tower vertical rotation, the present application adopts the tensioning assembly 101 and the combined hinge assembly 100 to solve the problem of vertical instability of the tower before dismantling, thereby meeting the requirements of safe and reliable vertical rotation of the tower.

[0099] 2. The combined hinge assembly 100 solves the problem of the vertical rotation angle limitation of the tower 2 and ensures the vertical rotation accuracy and safety of the tower 2.

[0100] 3. The slot-type design of the tire frame vehicle 400 and the track 3 solves the problem of longitudinal movement of the tower, reduces construction safety risks, and minimizes the impact on existing social traffic.

[0101] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0102] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0103] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for dismantling a tower for bridge construction, characterized in that: It includes the following steps: A vertical rotation system for a tower used in the construction of a bridge; the vertical rotation system for a tower used in the construction of a bridge comprises: a posture adjustment device (1), which comprises a combined hinge assembly (100) and a tensioning assembly (101); the combined hinge assembly (100) is arranged along the longitudinal bridge direction, and has a first connection portion for connecting to the bridge at its bottom and a second connection portion for connecting to a tower (2) at its top; the tensioning assembly (101) is located on both sides of the combined hinge assembly (100) in the longitudinal bridge direction, and has a tower top connection portion and a bridge connection portion; a movable support assembly (4), which is located on the side of the combined hinge assembly (100) in the longitudinal bridge direction away from the existing road; the movable support assembly (4) is used to support the tower (2) adjusted by the posture adjustment device (1) and move in the longitudinal bridge direction of the bridge; the movable support assembly (4) comprises: a tire frame vehicle (40 0), on which a supporting fixing structure (401) is provided; a roller (402), which is arranged at the bottom of the tire frame vehicle (400); the supporting fixing structure (401) includes a plurality of vertically arranged support rods spaced apart along the longitudinal bridge direction, the support rods being used to connect with the tower (2); the heights of the plurality of support rods are not equal, wherein the tops of some of the support rods are located on a first straight line, and the tops of the remaining support rods are located on a second straight line, and a space for accommodating the tower (2) is formed between the first straight line and the second straight line; and further includes a track (3) for being arranged on the bridge along the longitudinal bridge direction; an L-shaped limiting member (403) is provided on the tire frame vehicle (400) and on both sides of each of the rollers (402), the L-shaped limiting members (403) on both sides forming a limiting space, the top of the track (3) contacts the bottom of the roller (402) and is located within the limiting space; Installing an attitude adjustment device (1) on the tower (2) to enable the tower (2) to be installed on the bridge, thereby completing the vertical rotation preparation step; Remove the tensioning assembly (101) on the end of the longitudinal bridge upwardly away from the existing road, and adjust the tensioning degree of the tensioning assembly (101) so that the tower (2) rotates around the combined hinge assembly (100) and is placed on the movable support assembly (4); Removing the remaining tensioning components (101) and using a traction device to move the movable support component (4); When the mobile support assembly (4) moves to the end of the bridge longitudinal bridge upward and away from the existing road, the tower (2) is hoisted to the ground to complete the dismantling.

2. The method for dismantling a tower for bridge construction according to claim 1, wherein: The combined hinge seat assembly (100) comprises: A first upper hinge seat (1001) is located on a first transverse axis, the first transverse axis extending in the transverse direction of the bridge and passing through the center of the side of the bottom of the tower (2) in the longitudinal direction of the bridge; the first upper hinge seat (1001) is hinged to the first lower hinge seat (1003) via a first hinge axis (1002); a second upper hinge seat (1004) located on a second transverse axis extending in the transverse direction of the bridge and located on one end of the side of the bottom of the tower (2) in the longitudinal direction; the second upper hinge seat (1004) is hinged to the second lower hinge seat (1006) via a second hinge shaft (1005); The first connecting portion is located on the first lower hinge seat (1003) and the second lower hinge seat (1006); the second connecting portion is located on the first upper hinge seat (1001) and the second upper hinge seat (1004).

3. The method for dismantling a tower for bridge construction according to claim 1, wherein: The combined hinge seat assembly (100) comprises: A first upper hinge seat (1001) is located on a first transverse axis, the first transverse axis extending in the transverse direction of the bridge and passing through the center of the side of the bottom of the tower (2) in the longitudinal direction of the bridge; A second upper hinge seat (1004) is located on a second transverse axis, the second transverse axis extending in the transverse direction of the bridge and located at one end of the side of the bottom of the tower (2) in the longitudinal direction of the bridge; The common lower hinge seat is selectively hinged to the first upper hinge seat (1001) and the second upper hinge seat (1004) via a common hinge shaft; The first connection portion is located on the common lower hinge seat; the second connection portion is located on the first upper hinge seat (1001) and the second upper hinge seat (1004).

4. The method for dismantling a tower for bridge construction according to claim 1, wherein: The tensioning assembly (101) comprises: A steel strand (1011) is provided with an anchor cup (1012) with an ear plate and a tension rod (1013) at both ends; A through-hole jack (1014) is connected to the top of the tower (2) via a tower top reaction seat (1015); the tower top connection portion is provided on the tower top reaction seat (1015); a tension rod (1013) is passed through the through-hole jack (1014) and is connected to the telescopic end of the through-hole jack (1014); An anchor beam (1016) is connected to the anchor cup (1012) with an ear plate via a fork ear (1017); the bridge connection portion is provided on the anchor beam (1016), and the anchor beam (1016) is used to extend in the transverse direction of the bridge and is provided on the bridge.

5. The method for dismantling a tower for bridge construction according to claim 4, wherein: The base of the through-hole jack (1014) is connected to the tower top reaction seat (1015) via a support leg (1018); The tower top reaction seat (1015) is provided with an internal and external threaded anchor cup (10110), which is fixedly connected to the tower top reaction seat (1015) via a fixed anchor (1019) located in the support leg (1018); a guide channel for the steel strand (1011) to pass through is provided in the internal and external threaded anchor cup (10110).

6. The method for dismantling a tower for bridge construction according to claim 2, wherein: Adjusting the tensioning degree of the tensioning components (101) on both sides of the longitudinal bridge so that the tower (2) rotates around the combined hinge seat component (100) includes the following steps: Retracting the longitudinal bridge of the bridge upward away from the tensioning assembly (101) at one end where the road is located, stretching the transverse bridge of the bridge upward away from the tensioning assembly (101) at one end where the road is located, and rotating the tower (2) around the first hinge shaft (1002) to a first design angle; The connection between the first lower hinge seat (1003) and the bridge is removed, and the second lower hinge seat (1006) is connected to the bridge; then the longitudinal bridge of the bridge is retracted upward away from the tensioning assembly (101) at one end of the road, the longitudinal bridge of the bridge is stretched upward, and the tensioning assembly (101) at one end of the road is stretched, and the tower (2) is rotated to a second design angle with the second hinge shaft (1005) as the center.

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