CN111705662A - Deformable frame suitable for inclined structure construction - Google Patents
Deformable frame suitable for inclined structure construction Download PDFInfo
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- CN111705662A CN111705662A CN202010440808.7A CN202010440808A CN111705662A CN 111705662 A CN111705662 A CN 111705662A CN 202010440808 A CN202010440808 A CN 202010440808A CN 111705662 A CN111705662 A CN 111705662A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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Abstract
The invention discloses a deformable frame suitable for inclined structure construction, which comprises a plurality of layers of platform frames, wherein each layer of frame is formed by enclosing concrete by four L-shaped frame corner units and a middle connection mechanism to form a closed square-shaped frame; each L-shaped frame corner unit consists of two platform corner connecting pieces which are arranged between the two square frames in a shape like Chinese character 'mu'; the structures of the platform corner connecting pieces positioned on the same layer are the same; an oil cylinder with a horizontal oil cylinder rod is arranged at the square frame in the shape of a Chinese character 'mu' of the bottommost layer frame; the deformable frame is arranged in a way that when the oil cylinder rod extends out to abut against the vertical surface of concrete, a certain layer of mesh-shaped square frame in the middle of the first platform corner connecting piece is used as a rotating shaft, and other layers of platforms rotate around the rotating shaft, so that the horizontal direction of each layer of frame deforms, and the vertical stand columns incline to form an enclosing structure for enclosing the inclined concrete. The modularized fast mounting and dismounting device has the characteristics of strong integral cooperative stress bearing capacity, wide structure synchronous deformation adaptive bridge tower range and the like.
Description
Technical Field
The invention belongs to the technical field of building construction, relates to a formwork system for inclined structure construction, and particularly relates to a formwork frame system for inclined structure construction.
Background
Traditional bridge tower construction die carrier system to creeping formwork, turn over the mould and be the main, the key feature of these two kinds of systems is that divide into the independent plane unit of a plurality of with construction die carrier system, does not consider the mutual biography power between the unit, and it is weak to have horizontal bearing capacity, and vertical rigidity is low, and structural deformation is big, and personnel's construction experience shortcoming such as poor. Meanwhile, along with the diversification of the modeling of the bridge tower, the large inclination angle and the fold line modeling cause the large workload of the dismantling and changing of the traditional formwork in the construction process, and the construction progress is seriously influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a deformable frame suitable for inclined structure construction; the bridge tower structure can be suitable for the concrete structure, is integrally inclined, or is in a broken line shape formed by the inclination of sections, and has the characteristics of fast assembly and disassembly in a modularization way, strong integral synergetic stress bearing capacity, wide structure synchronous deformation adaptive bridge tower range and the like.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a deformable frame suitable for inclined structure construction comprises a plurality of layers of platform frames connected through vertical stand columns, and is characterized in that each layer of frame is formed into a closed square-shaped shape by enclosing concrete by four L-shaped frame corner units and a middle connection mechanism; each L-shaped frame corner unit consists of two platform corner connecting pieces which are arranged between the two square frames in a shape like Chinese character 'mu'; from top to bottom, at least the upper three layers of frames adopt first platform corner connecting pieces, at least the lowest three layers of frames adopt second platform corner connecting pieces, and the internal enclosed space of the right-angle corresponding edge of each second platform corner connecting piece is larger than that of each first platform corner connecting piece; the structures of the platform corner connecting pieces positioned on the same layer are the same; an oil cylinder with a horizontal oil cylinder rod is arranged at the square frame in the shape of a Chinese character 'mu' of the bottommost layer frame; the deformable frame is arranged in a way that when the oil cylinder rod extends to abut against the vertical surface of concrete, a certain layer of grid-shaped square frame in the middle of the first platform corner connecting piece is used as a rotating shaft, and other layers of platforms rotate around the rotating shaft, so that parallelogram deformation occurs in the horizontal direction of each layer of frame, and the vertical stand columns are inclined to form an enclosing structure for enclosing the inclined concrete.
In the technical scheme, in four cross beams which are formed by enclosing the square-shaped square frame, the inner sides of the cross beams which are connected with the platform corner connecting pieces are respectively provided with an inner cross beam of the inserting frame in parallel at intervals, and the inner cross beams of the inserting frame and the outer side adjacent parallel cross beams form the inserting frame; arranging an upright standard knot which can be vertically buckled with the square frame and is provided with four-corner upright posts, wherein the four-corner upright posts are connected through upright standard knot beams; the four-corner upright posts of the upright post standard knot are respectively inserted into two ends of each insertion frame; the inserting frame is tightly matched with the four-corner upright post of the upright post standard knot; the beam of the corner connecting piece of the square frame connecting platform and the middle point of the beam of the parallel upright standard joint are correspondingly provided with pin holes, and the square frame and the upright standard joint are hinged through a pin shaft to form a frame rotating mechanism taking the pin shaft as a rotating shaft.
Among the above-mentioned technical scheme, the four corners stand of stand standard knot passes through connecting piece and vertical stand rigid connection respectively in order to form the whole frame of fixed multilayer frame.
According to the technical scheme, the polytetrafluoroethylene plate with the set friction coefficient is clamped and installed on the vertical contact surface of each upright post of the square frame insertion frame and the upright post standard knot.
According to the technical scheme, each layer of platform frame is divided into a steel bar operation platform, a template operation platform and a supporting operation platform from top to bottom according to functions. The first platform corner connecting piece of the steel bar operation platform and the template operation platform is diamond-shaped, and the supporting operation platform adopts an L-shaped second platform corner connecting piece.
In the technical scheme, the edges of the first platform corner connecting piece corresponding to the right angle are respectively butted with two vertex angles closest to the two square frames in the shape of the Chinese character mu; the edges of the second platform corner connecting piece corresponding to the right angle are vertically butted with the middle section of the beam of the innermost square frame of the two square frames, which is not connected with the platform corner connecting piece.
In the technical scheme, the whole frame is supported on the concrete structure through the supporting structure.
In the above technical scheme, the supporting structure is a supporting frame capable of climbing vertically.
In the technical scheme, the supporting structure is a supporting frame capable of climbing along a vertical rail fixed on concrete, and each sliding contact end of the supporting frame is arranged on two sides of four vertical edges of the quadrangular concrete; the top of the supporting frame is fixed on a first platform corner connecting piece of the lowest layer frame; and the frames below the layer of frames are provided with second platform corner connecting pieces.
The invention has the following beneficial effects: the invention can actively change the self angle according to the shape of the bridge tower and provides a strict operation platform for the construction of the bridge tower. The principle is a deformable mechanism consisting of a parallelogram with a plurality of hinged vertices. The L-shaped frame corner units are mutually constrained to form a cooperative stress system, so that the overall stability of the structure is improved. And the linking mechanisms among the four L-shaped frame corner units are arranged among the L-shaped corner units to form an integral stress system to resist external loads together. Meanwhile, the contact mechanism forms a continuous operation channel and safety protection.
The overall deformation principle of the frame is as follows: after the redundant constraint is removed, the frame is a variable mechanism formed by combining parallelograms with hinged vertexes, wherein a certain layer of platform is fixed on a self supporting structure (such as a die carrier supporting system, which is not described in detail in the prior art), and the rest platforms rotate around the fixed platform and are always kept in a parallel state with the fixed platform.
The upright columns are composed of a plurality of standard section upright columns and a plurality of customized sections so as to meet the construction requirements of different bridge towers, and therefore the turnover rate of the frame is improved. The column custom-made segments are four steel bar members, the two ends of each steel bar member can be in bolt or flange butt joint with the standard segment short columns, and the length of each steel bar member can be determined according to actual construction requirements.
The rotating mechanism between the upright post and the platform consists of a standard section of the upright post and a square frame shaped like a Chinese character 'mu' of the platform, and is connected through a pin shaft for connecting the standard section of the upright post and the square frame shaped like the Chinese character 'mu'. The four upright posts are combined into a whole and then connected with the platform, so that the number of hinge points is reduced, and the risk of locking the hinge points is reduced. The hinge point is positioned on the upright post cross beam and below the platform, and after the rotation is completed, the upright post cross beam does not protrude out of the plane, so that the passage of the platform is not influenced.
The platform and the upright post adopt a standard section and a customized section, are processed according to the actual engineering and then are assembled in a combined mode, the turnover rate of the component is improved, and the cost is saved.
The invention is used by combining with a bridge tower construction formwork supporting jacking system, can actively deform according to the inclination angle of the bridge tower, and simultaneously contracts and deforms along with the contraction of the cross section of the bridge tower, thereby providing an integral, stable and tight operation platform for bridge tower construction.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural diagram of a formwork operation platform of a deformable frame according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a work platform supporting a flexible frame according to an embodiment of the invention.
Fig. 3 is a schematic view of a detachable structure of a rotating mechanism of a deformable frame according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a disassembled structure of the deformable frame of the invention.
Fig. 5 is a schematic view of an assembled structure of the deformable frame of the present invention.
FIG. 6 is a schematic view of an embodiment of the deformable frame of the present invention in a support structure.
FIG. 7 is a general schematic view of an embodiment of the invention deformable frame in a support structure.
Fig. 8 is a plan view of the deformable frame of the present invention.
Fig. 9 is a schematic structural view of an embodiment of the deformable frame of the present invention suitable for use in tilt-tower concrete.
Fig. 10 is a schematic structural view of the support structure of fig. 9.
1. A square frame shaped like a Chinese character mu; 11. inserting the frame; 12. a fixed end; 13. a first beam of a square frame shaped like a Chinese character mu; 131. inserting the frame inner beam; 14. a second beam of the square frame shaped like a Chinese character 'mu'; 15. a square pin shaft hole; a first platform corner connector; 22. a second platform corner connector; 3. standard sections of the upright posts; standard section short upright post of upright post; 32. a first cross beam of the standard section of the upright column; 33. standard pin hole of the upright post; a second beam of the standard section of the upright column; 4. a corner unit linkage mechanism; 5. column customization joints; 6. a mold frame support frame; 7. a concrete structure; 8 oil cylinders.
Detailed Description
The invention will be further illustrated with reference to the following specific examples and the accompanying figures 1-10. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, the L-shaped corner unit of a single-layer steel bar working platform or a formwork working platform is composed of a first platform corner connecting piece 2 sandwiched by two square frames 1 in a shape like Chinese character 'mu'. The edges of the first platform corner connecting piece 2 corresponding to the right angle are respectively butted with two vertex angles which are closest to the two square frames 1 in the shape of Chinese character mu.
Fig. 2 shows an L-shaped corner unit for supporting a work platform in a single layer, which is also composed of two second platform corner connectors 21 sandwiched by two frames 1 in a shape like Chinese character mu. The edges of the second platform corner connecting piece 21 corresponding to the right angle are vertically butted with the middle sections of the second cross beams 14 of the innermost square frames of the two square frames 1, compared with the first platform corner connecting piece 2, the space enclosed by the edges corresponding to the right angle of the second platform corner connecting piece 21 is larger, and the second platform corner connecting piece 21 reserves an opening according to the space size requirement of supporting and jacking, so that a shielding hole is not easy to form.
As shown in fig. 3, the standard section 3 of the upright column is inserted into the insertion frame 11 of the square frame 1 from bottom to top, and the first cross beam 32 of the standard section of the upright column is connected with the short upright column 31 of each standard section of the upright column; and aligning the pin shaft holes 15 and 33 and inserting a pin shaft, thereby forming a hinge rotating mechanism which rotates by taking the pin shaft as an axis between the standard upright post joint 3 and each platform Chinese character mu-shaped frame 1. The inserting frame 11 is formed by arranging the first cross beam 13 of the square frame in a shape of Chinese character mu and the inner cross beam 131 of the inserting frame at intervals in parallel, and the interval distance is tightly matched with the standard section short upright 31 of the standard section 3 of the upright. If necessary, a polytetrafluoroethylene plate with a low friction coefficient can be arranged on the contact surface of the first cross beam 13 of the square frame and the inner cross beam 131 of the insertion frame with the short upright column 31 of the standard upright section respectively, so that the standard upright section 3 is limited, and the rotational friction resistance is reduced.
As shown in fig. 4-5, after the platforms of each layer are connected with the standard upright post sections 3 in a butt joint mode, the platforms of multiple layers are connected up and down through the customized upright post sections 5 to form corner units. The height of the platform layer can be adjusted by the length of the column customizing section 5, and the customizing and processing cost is low.
As shown in fig. 8, the four corner units are connected by the middle corner unit linking mechanism 4 to form an integral steel frame, so as to form a closed space shaped like a Chinese character 'hui'. The corner units are mutually constrained to form a cooperative stress system, so that the overall stability of the structure is improved.
For bridge tower concrete 7 with any section size, the corner unit connection mechanism 4 can be customized according to engineering requirements, the customization cost is low, the corner unit can be reused, and the turnover rate is high. The corner unit linkage mechanism 4 changes along with the change of the distance between the corner units and comprises a commonly used follow-up connecting rod and a sliding walkway plate; the two ends of the sliding walkway plate are lapped on the platform surfaces of the adjacent corner units, one end of the sliding walkway plate is fixed with the platform, and the other end of the sliding walkway plate can freely slide on the platform surfaces, so that the description is omitted.
A hydraulic oil cylinder 8 is additionally arranged at the bottom layer of the steel frame, as shown in figure 5, the end head of the oil cylinder is a universal nylon wheel and is used for propping against the surface of concrete 7 and adjusting the distance between each platform and the surface of the structure. Thereby realizing active deformation of the whole frame. In the embodiment of fig. 5, the deformable frame is divided into 6 layers, the upper three layers are sequentially the steel bar working layer and the formwork working platform from top to bottom, the lower three layers are the supporting working platform, the supporting working platform adopts the second platform corner connecting piece 21 with larger corner space, and shielding is not easy to form. When the template is deformed, a pin shaft of the third layer template operation platform from top to bottom in the figure 5 is a rotating shaft, the third layer platform is fixed, other platforms rotate around the third layer platform, each layer of platform is kept horizontal in the process, the column customization section 5 inclines, and finally the appearance of the figure 9 is formed.
The deformable frame may be supported on the concrete structure by various climbing formwork support structures. The following provides a specific support structure application example.
Example 2
As shown in fig. 6-10, the deformable frame (not shown are the balustrades and other protective systems) is mounted on the formwork support frame 6 of the bridge tower concrete 7, i.e. the deformable frame is supported by the formwork support frame 6 at the periphery of the bridge tower concrete 7. The formwork support frames 6 are arranged at the four corners of the concrete 7, as shown in fig. 8.
In this embodiment, the second platform corner connector 21 with a larger corner space is used to support the work platform without obstructing the gantry support frame 6. The top surface of the formwork support frame 6 is rigidly screwed with the first platform corner connecting piece 2. The formwork support frame 6 is vertically climbed through a vertical rail fixed on the concrete 7 under the action of a jacking cylinder (not shown in fig. 10), and the end attachment piece 62 slides in the rail during climbing.
The whole application process is divided into two working conditions. Under the first jacking working condition, the frame is not deformed, the die carrier supporting frame 6 vertically climbs, and the working condition and the frame are not deformed. And in the second working condition, namely the deformation working condition, when the tower column concrete 7 deforms along a fold line, the vertical height of the whole platform is kept unchanged, the die set supporting frame 6 is fixed, each platform of the frame deforms through the rotating mechanism of the invention, and the stand column inclines.
The overall deformation principle of the frame is as follows: the frame is a variable mechanism formed by combining parallelograms with hinged vertexes, wherein a certain layer of platform is fixed on a formwork support system, and the rest platforms rotate around the fixed platform and are always kept in a parallel state with the fixed platform.
For the bridge tower with an inclined angle, the frame can be deformed integrally, actively adapts to the appearance of the bridge tower, and provides an integral, stable and tight construction platform for the construction of the bridge tower.
Claims (9)
1. A deformable frame suitable for inclined structure construction comprises a plurality of layers of platform frames connected through vertical stand columns, and is characterized in that each layer of frame is formed into a closed square-shaped shape by enclosing concrete by four L-shaped frame corner units and a middle connection mechanism; each L-shaped frame corner unit consists of two platform corner connecting pieces which are arranged between the two square frames in a shape like Chinese character 'mu'; from top to bottom, at least the upper three layers of frames adopt first platform corner connecting pieces, at least the lowest three layers of frames adopt second platform corner connecting pieces, and the internal enclosed space of the right-angle corresponding edge of each second platform corner connecting piece is larger than that of each first platform corner connecting piece; the structures of the platform corner connecting pieces positioned on the same layer are the same; an oil cylinder with a horizontal oil cylinder rod is arranged at the square frame in the shape of a Chinese character 'mu' of the bottommost layer frame; the deformable frame is arranged in a way that when the oil cylinder rod extends to abut against the vertical surface of concrete, a certain layer of grid-shaped square frame in the middle of the first platform corner connecting piece is used as a rotating shaft, and other layers of platforms rotate around the rotating shaft, so that parallelogram deformation occurs in the horizontal direction of each layer of frame, and the vertical stand columns are inclined to form an enclosing structure for enclosing the inclined concrete.
2. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: in four cross beams of the square enclosed by the square frames, an inner cross beam of the insertion frame is arranged on the inner side of each cross beam of the connecting piece for connecting the corners of the platform at intervals in parallel, and the inner cross beams of the insertion frame and the outer adjacent parallel cross beams form the insertion frame; arranging an upright standard knot which can be vertically buckled with the square frame and is provided with four-corner upright posts, wherein the four-corner upright posts are connected through upright standard knot beams; the four-corner upright posts of the upright post standard knot are respectively inserted into two ends of each insertion frame; the inserting frame is tightly matched with the four-corner upright post of the upright post standard knot; the beam of the corner connecting piece of the square frame connecting platform and the middle point of the beam of the parallel upright standard joint are correspondingly provided with pin holes, and the square frame and the upright standard joint are hinged through a pin shaft to form a frame rotating mechanism taking the pin shaft as a rotating shaft.
3. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: the four corner upright posts of the upright post standard knot are respectively and rigidly connected with the vertical upright posts through connecting pieces to form a body frame for fixing the multilayer frame.
4. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: and a polytetrafluoroethylene plate with a set friction coefficient is clamped and installed on the vertical contact surface of the square frame insertion frame and each upright post of the upright post standard knot.
5. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: each layer of platform frame is divided into a steel bar operation platform, a template operation platform and a supporting operation platform from top to bottom according to functions; the first platform corner connecting piece of the steel bar operation platform and the template operation platform is diamond-shaped, and the supporting operation platform adopts an L-shaped second platform corner connecting piece.
6. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: the edges of the first platform corner connecting piece corresponding to the right angle are respectively butted with two vertex angles closest to the two square frames in the shape of the Chinese character mu; the edges of the second platform corner connecting piece corresponding to the right angle are vertically butted with the middle section of the beam of the innermost square frame of the two square frames, which is not connected with the platform corner connecting piece.
7. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: the frame is supported on the concrete structure by the supporting structure.
8. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: the supporting structure is a supporting frame capable of climbing vertically.
9. A deformable frame suitable for the construction of inclined structures, according to claim 1, characterized in that: the supporting structure is a supporting frame capable of climbing along a vertical rail fixed on concrete, and each sliding contact end of the supporting frame is arranged on two sides of four vertical edges of the quadrangular concrete; the top of the supporting frame is fixed on a first platform corner connecting piece of the lowest layer frame; and the frames below the layer of frames are provided with second platform corner connecting pieces.
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| CN202010440808.7A CN111705662B (en) | 2020-05-22 | 2020-05-22 | Deformable frame suitable for inclined structure construction |
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| CN202010440808.7A CN111705662B (en) | 2020-05-22 | 2020-05-22 | Deformable frame suitable for inclined structure construction |
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| CN111705662B (en) | 2022-03-25 |
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