Integral dismantling device for bottom side mold structure of hanging basket on river channel

Abstract

The utility model provides an integral dismantling device for a bottom side mold structure of a hanging basket on a river channel, which is characterized in that vertical preformed holes are formed in a box girder top plate and a box girder bottom plate right above hanging points of a front lower cross beam and a rear lower cross beam, and a portal wall body is erected on the periphery of the preformed holes in a bridge floor of the box girder top plate through steel bearing beams; a carrying pole beam is installed on the portal frame wall body and right faces the reserved holes to form a profile steel portal frame, a center hole jack is vertically installed on the carrying pole beam, and a finish rolling twisted steel bar vertically penetrates through the center hole jack, a middle hole of the carrying pole beam, reserved holes of a beam body top plate and a beam body bottom plate, a front lower cross beam and a rear lower cross beam hanging point. Matched nuts and steel base plates are arranged at the upper end of the center hole jack, the top surface of the preformed hole of the box girder top plate and the lifting point of the lower cross beam; and the center hole jack is connected with an oil pump and controls the piston stroke of the jack through the oil pump. The problems that an existing riverway hanging basket bottom side formwork structure dismantling method is multiple in working procedure, low in efficiency, high in safety risk and the like are solved. Belongs to the technical field of bridge construction.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and particularly relates to an integral demolition device for the bottom side formwork structure of a hanging basket on a river course. Background Technique

[0002] After the cantilever casting construction of a long-span extra-wide variable cross-section continuous beam spanning a river course is completed, it is necessary to demolish the hanging basket and formwork structure. The hanging basket and the bottom side formwork structure are located above the river course. The upper part of the bottom side formwork structure is restricted by the box girder body, and the lower part is restricted by the river course, so it cannot be directly demolished by a crane like on land. The traditional method is to gradually retreat the hanging basket and the bottom side formwork structure at the mid-span along the longitudinal direction of the bridge to near the 0# or 1# section of the box girder. Under the condition that the main truss and suspension components of the hanging basket are stressed, the side formwork and bottom formwork components are first demolished by a crane or tower crane, and then the suspension structure, main truss and track structure of the hanging basket are demolished. This method has problems such as more construction procedures, low construction efficiency, and higher safety risks. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model provides an integral demolition device for the bottom side formwork structure of a hanging basket on a river course, so as to solve the problems of more procedures, low efficiency, and higher safety risks existing in the current demolition method of the bottom side formwork structure of a hanging basket on a river course.

[0004] The utility model provides an integral demolition device for the bottom side formwork structure of a hanging basket on a river course, which includes a hydraulic vertical synchronous lowering device arranged vertically above the front lower cross beam and the rear lower cross beam of the hanging basket. The hydraulic vertical synchronous lowering device includes a through-hole jack, an oil pump, a high-strength threaded steel bar, a cross beam and a steel cushion beam. Vertical reserved holes are opened on the top plate and bottom plate of the box girder directly above the hanging points of the front lower cross beam and the rear lower cross beam. A gantry wall is built around the reserved hole on the bridge deck of the top plate of the box girder through a steel cushion beam. A cross beam is installed on the gantry wall facing the reserved hole to form a steel portal frame. A through-hole jack is vertically installed on the cross beam. The high-strength threaded steel bar vertically passes through the through-hole jack, the middle hole of the cross beam, the reserved holes of the top plate and bottom plate of the beam body, and the hanging points of the front lower cross beam and the rear lower cross beam. Matching nuts and steel backing plates are arranged at the upper end of the through-hole jack, the top surface of the reserved hole of the top plate of the box girder, and the hanging point of the lower cross beam. The through-hole jack is connected to the oil pump and the piston stroke of the jack is controlled by the oil pump.

[0005] In the above-mentioned integral demolition device, a set of hydraulic vertical synchronous lowering device is vertically arranged above the left, middle and right of the front lower cross beam and the rear lower cross beam of the hanging basket, and vertical reserved holes are respectively opened on the top plate and bottom plate of the box girder directly above the left, middle and right hanging points of the front lower cross beam and the rear lower cross beam;

[0006] In the above-mentioned integral demolition device, the piston strokes of 3 through-hole jacks in the same cross section are synchronously controlled by connecting 1 oil pump in parallel.

[0007] Compared with the prior art, a ship with structural dimensions and bearing capacity greater than the structural parameters of the bottom side form of the hanging basket is arranged in the river channel directly below the bottom side form of the hanging basket to catch and transport the bottom side form of the hanging basket to the shore for demolition. The utility model can realize the direct, rapid and synchronous overall lowering and demolition of the bottom side form structure on the river channel. The main truss of the hanging basket, the original suspension structure, the track structure, etc. can be demolished in place on the bridge deck in advance or synchronously. The device is composed of conventional components and equipment of the hanging basket existing on site, and can use local materials and be reused repeatedly. The operation is convenient, the construction efficiency is improved, the construction is safer and more reliable, the time for the hanging basket structure to affect the construction working surface of the bridge deck system is greatly shortened, and the construction cost is reduced. At present, it has been used in some engineering projects and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is the front view structural schematic diagram of the utility model in the use state;

[0009] Figure 2 is the layout diagram of the rear section of the hanging basket;

[0010] Among them, 1-front lower cross beam, 2-rear lower cross beam, 3-through jack, 5-finished rolled threaded steel bar, 6-shoulder beam, 7-steel cushion beam, 8-top slab of box girder, 9-bottom slab of box girder, 10-reserved hole, 13-matching nut and steel backing plate, 14-box chamber of cantilever casting box girder, 15-steel longitudinal beam, 16-lower guide beam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] In order to make the above objects, features and advantages of the utility model more obvious and understandable, the following detailed description of the specific embodiments of the utility model will be made in conjunction with the drawings in the specification.

[0012] In the following description, many specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the utility model. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0013] Secondly, the utility model will be described in detail in conjunction with the schematic diagrams. When describing the embodiments of the utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general ratio, and the schematic diagrams are only examples and should not limit the scope of protection of the utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0014] Next, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures or characteristics that may be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" that may appear in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0015] Embodiment

[0016] As shown in the attached Figure 1 and Figure 2 As shown, in this embodiment, the demolition device for the bottom side form structure of the hanging basket on the river channel is improved. The improved demolition device includes a set of hydraulic vertical synchronous lowering devices vertically arranged directly above the left, middle and right positions of the front lower cross beam 1 and the rear lower cross beam 2 of the hanging basket. The hydraulic vertical synchronous lowering device includes a through-hole jack 3, an oil pump, a high-strength rolled thread steel bar 5, a cross beam 6 and a steel cushion beam 7. Vertical reserved holes 10 are respectively opened on the box girder top plate 8 and the box girder bottom plate 9 directly above the left, middle and right hanging points of the front lower cross beam 1 and the rear lower cross beam 2. A gantry wall is erected around the reserved hole 10 on the bridge deck of the box girder top plate 8 through the steel cushion beam 7. The cross beam 6 is installed on the gantry wall facing the reserved hole 10 to form a profiled steel gantry. The through-hole jack 3 is vertically installed on the cross beam 6. The high-strength rolled thread steel bar 5 vertically passes through the through-hole jack 3, the middle hole of the cross beam 6, the reserved holes 10 in the top and bottom plates of the beam body, and the hanging points of the front lower cross beam 1 and the rear lower cross beam 2. Matching nuts and steel backing plates are arranged at the upper end of the through-hole jack 3, the top surface of the reserved hole on the box girder top plate 8, and the hanging point of the lower cross beam 2. The 3 through-hole jacks 3 in the same cross section are connected in parallel to 1 oil pump to synchronously control the piston stroke of the jacks.

[0017] The specific steps and key points for the overall demolition by the above demolition device are as follows:

[0018] 1) Construction preparation: Review the structure parameters of the hanging basket and the bottom side form structure, formulate the demolition plan in advance and conduct technical disclosure, and promptly prepare the required materials, mechanical equipment and construction personnel.

[0019] 2) When constructing the box girder of the bridge, according to the installation position of the last section of the hanging basket, vertical reserved holes 10 are set in advance in the box girder top plate 8 and the box girder bottom plate 9 directly above the left, middle and right hanging points of the two lower cross beams (the front lower cross beam 1, the rear lower cross beam 2 and including the lower guide beam 16) of the hanging basket. The position of the reserved hole 10 should be accurately aligned with the hanging point.

[0020] 3) Install two rows of steel cushion beams 7 with more than three layers around the reserved hole 10 on the box girder top plate 8, install the cross beam 6 on the steel cushion beam 7, align the middle hole of the cross beam 6 with the reserved hole 10, and the steel cushion beam 7 and the cross beam 6 form a gantry structure.

[0021] 4) Vertically install the large-stroke through-type jack 3 on the crossbeam 6. The center of the through-type jack 3 and the center of the reserved hole 10 are on the same vertical axis. Three through-type jacks 3 on the same cross-section are connected in parallel to one oil pump (the specification can be one pump towing four jacks), realizing synchronous control of one oil pump for multiple through-type jacks 3 on the same cross-section to lift and lower together.

[0022] 5) Vertically install the full-length high-strength threaded steel bar 5 through the through-type jack 3, crossbeam 6, reserved hole 10, and the hanging points of the two lower crossbeams (including the lower guide beam 16). Matching nuts and steel backing plates 13 need to be installed above the jack. Matching nuts and steel backing plates 13 need to be installed at the top surface of the reserved hole on the top plate of the box girder. Matching nuts and steel backing plates 13 are closely installed at the hanging points of the two lower crossbeams (front lower crossbeam 1, rear lower crossbeam 2 and including the lower guide beam 16). Tighten the nuts to make the vertical high-strength threaded steel bar 5 hanger bear force, forming a new suspension system and the hydraulic integral lowering device for the bottom side formwork structure of the hanging basket.

[0023] 6) Connect and reinforce the side formwork and bottom formwork structures of the hanging basket to form a whole.

[0024] 7) Remove the original connection structure between the bottom formwork, side formwork and the box girder body, and remove the original suspension structure between the bottom formwork, side formwork structure and the hanging basket truss or the beam body, and only the newly installed vertical full-length high-strength threaded steel bar 5 hanger bears the force.

[0025] 8) Move the matching nuts and steel backing plates 13 above the through-type jack 3 up by a stroke distance, and start the oil pump to control multiple through-type jacks 3 to synchronously extend the pistons by a stroke and tighten against the matching nuts and steel backing plates 13 above them to bear force.

[0026] 9) Move the matching nuts and steel backing plates 13 on the top surface of the reserved hole 10 of the top plate 8 of the box girder up by a stroke. The oil pump returns oil to control multiple through-type jacks 3 to synchronously and slowly and evenly retract the pistons by a stroke, and the bottom formwork and side formwork structures of the hanging basket will slowly and evenly descend by a stroke distance as a whole, so that the matching nuts and steel backing plates 13 on the reserved hole 10 of the box girder bridge deck are closely attached to the bridge deck to bear force. Thus, a cycle of integral lowering of the bottom formwork and side formwork structures is completed.

[0027] 10) Repeat the operation process and method of steps 8 and 9, and slowly and evenly lower the bottom formwork and side formwork structures of the hanging basket as a whole to the ship in the river directly below. The ship catches the bottom side formwork structure and bears all the load weights of the bottom side formwork structure.

[0028] 11) Remove the through-type jack 3, high-strength threaded steel bar 5, matching nuts and steel backing plates 13, steel portal frame, etc. of the hydraulic integral lowering system device, so that the bottom side formwork structure of the hanging basket is completely separated from the box girder body.

[0029] 12) The bottom side form structure of the ship-borne hanging basket reaches the shore. Workers initially disassemble the components of the bottom side form structure on the ship, and a crane on the shore lifts the disassembled components to a designated storage area on the shore for further decomposition.

[0030] 13) Clean and polish the components, store them in a classified and regularized manner, and load and transport them away in a timely manner.

[0031] 14) After step 7 is completed, the removal operation of the hanging basket structure on the box girder bridge deck can be carried out synchronously. When removing, it is necessary to follow the order and principle of from top to bottom, first installed first removed, and last installed first removed. The connection between the removed component and the component to be removed can only be removed after the crane hook is stressed to ensure safety. The removed components should be decomposed, cleaned, loaded and transported away in a timely manner.

[0032] It is important to note that the construction and arrangement of the present application shown in multiple different exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application (for example, the dimensions, scales, structures, shapes and proportions of various components, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature, number or position of discrete elements can be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure that performs the recited function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0033] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present utility model or those features that are not relevant to the implementation of the present utility model).

[0034] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be routine work of design, manufacture, and production.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. The overall dismantling device of the bottom side mold structure of the hanging basket on the river channel is characterized by: The invention comprises a hydraulic vertical synchronous lowering device vertically distributed and arranged just above the front lower cross beam (1) and the rear lower cross beam (2) of the hanging basket, the hydraulic vertical synchronous lowering device comprising a through-type jack (3), an oil pump, a finely rolled threaded steel bar (5), a shoulder beam (6) and a steel cushion beam (7), a vertical reserved hole (10) is opened on the box beam top plate (8) and the box beam bottom plate (9) just above the hanging point of the front lower cross beam (1) and the rear lower cross beam (2), a portal frame wall is erected around the reserved hole (10) of the bridge deck of the box beam top plate (8) through the steel cushion beam (7), and a vertical reserved hole (10) is arranged on the portal frame wall. The shoulder pole beam (6) is installed to face the reserved hole (10) and form a steel gantry. The through-type jack (3) is vertically installed on the shoulder pole beam (6). The finely rolled threaded steel bar (5) vertically passes through the through-type jack (3), the hole in the shoulder pole beam (6), the reserved holes (10) on the top plate and bottom plate of the beam body, the front lower cross beam (1) and the rear lower cross beam (2) hanging points. Matching nuts and steel pads are arranged at the upper end of the through-type jack (3), the top surface of the reserved hole of the box beam top plate (8) and the hanging point of the lower cross beam (2). The through-type jack (3) is connected to an oil pump and the jack piston stroke is controlled by the oil pump.

2. According to claim 1, the device for dismantling the bottom side mold structure of the river channel hanging basket is characterized in that: A set of hydraulic vertical synchronous lowering devices are respectively arranged in the vertical direction just above the left, middle and right positions of the front lower cross beam (1) and the rear lower cross beam (2) of the hanging basket, and vertical reserved holes (10) are respectively opened on the box beam top plate (8) and the box beam bottom plate (9) just above the left, middle and right hanging points of the front lower cross beam (1) and the rear lower cross beam (2).

3. According to claim 1, the device for dismantling the bottom side mold structure of the river channel hanging basket is characterized in that: Three through-type jacks (3) of the same cross section are connected in parallel to one oil pump to achieve synchronous control of the jack piston stroke.

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