CN220621034U - Circular column formwork system - Google Patents

Abstract

The utility model discloses a circular column formwork system, which comprises: the device comprises a steel bar column, a plastic pipe die, a plurality of groups of rope clamps and a pipe die support die frame. The steel bar column and the plastic pipe die are vertically supported on the structural surface respectively, the plastic pipe die is sleeved outside the steel bar column, and the plastic pipe die comprises a plurality of pipe dies which are sequentially arranged along the circumferential direction of the plastic pipe die. The outer wall of the plastic pipe die is also provided with annular grooves which are sequentially arranged along the height direction and are respectively concaved inwards to form an annular shape, and a plurality of groups of rope clamps are respectively clamped in the corresponding annular grooves and used for clamping a plurality of pipe dies inwards along the circumferential direction to seal the plastic pipe die, and the rope clamps at the top end are also connected with the steel bar columns to suspend the plastic pipe die. The pipe die supporting frame is supported on the structural surface and is arranged outside the plastic pipe die in a surrounding manner so as to be used for inwards clamping a plurality of pipe dies to seal the plastic pipe die. The novel formwork system is light in weight and difficult to deform, is convenient in transportation construction, can reduce labor and material investment simultaneously, also ensures construction safety and reliability, and greatly improves overall appearance.

Description

Circular column formwork system

Technical Field

The utility model relates to the technical field of constructional engineering, in particular to a circular column formwork system.

Background

In recent years, with rapid development of modern building design and construction level, requirements of people on use functions and visual impression of building engineering are also higher and higher, and circular columns are widely applied. The traditional circular column construction method adopts PVC mould, custom steel mould and the like for construction, and the PVC mould is convenient to transport, but adopts PVC mould, which is only suitable for columns with the thickness of 200-400 mm and is not suitable for columns with the thickness of more than 400 mm; the steel template has large weight, is inconvenient to transport, even needs vertical mechanical transportation, easily causes the problems of non-compact joints, non-vertical column molds and the like, and in the engineering for processing the template, the steel template is complex in installation and reinforcement process, and consumes more manpower and material resources, thereby seriously delaying the construction period.

When the traditional building column of building engineering field fills construction, often adopt on-the-spot mode of joining in marriage mould reinforcement, the column form formwork order is: leveling and paying off, wiping and leveling a belt, binding reinforcing steel bars, standing a formwork, correcting and tying for fixing, adjusting and aligning with a beam and roof formwork joint for reinforcement, adjusting and fixing verticality of a column formwork by adding an inclined rod, and connecting with a full framing scaffold into a whole for reinforcement. The circular column template commonly used generally adopts a shaping steel template system and a glass fiber reinforced plastic cylinder template system, which can lead to a plurality of integral joints of templates, the templates are not tightly connected, the problems of low cylindrical flatness, low smoothness, slurry leakage and the like are caused, the integral impression effect is influenced, meanwhile, the cost of the customized template is higher, more manpower is required to be consumed during installation, even vertical transportation mechanical assistance and the like are required, and the economic performance is low.

The PVC template system is adopted, the outer wall of the PVC pipe is too smooth, the column hoops cannot be fixed, the column is easy to deform, the PVC pipe is made into the whole column mould by common treatment measures, the whole column mould is not removed, but the material waste is caused, the construction cost is increased, moreover, the column mould is made of the PVC pipe, and the column mould is only suitable for the column with the thickness of 200-400 mm, and is not suitable for the construction of the larger column.

Disclosure of Invention

The utility model provides a circular column formwork system, which solves the technical problems that the prior shaping steel formwork system and PVC formwork system have more integral seams of templates, are not tightly connected with each other, cause the problems of low cylindrical flatness, low smoothness, slurry leakage and the like, influence the integral impression effect, have higher cost for customizing the templates, consume more manpower during installation, even require vertical transportation mechanical assistance and the like, have low economic performance, cannot fix a column hoop, easily cause column deformation, waste materials, increase construction cost and are not suitable for larger column construction.

The technical scheme adopted by the utility model is as follows:

a circular column formwork system comprising: binding to form a reinforced column for forming a concrete reinforced circular column with the poured concrete, a plastic pipe die for supporting the circular column, a plurality of groups of rope clamps and a pipe die supporting frame; the steel bar column and the plastic pipe die are respectively vertically supported on the structural surface, the plastic pipe die is sleeved outside the steel bar column, and the plastic pipe die comprises a plurality of pipe dies which are sequentially arranged along the circumferential direction of the plastic pipe die; the outer wall of the plastic pipe die is also provided with annular grooves which are sequentially arranged along the height direction and respectively concaved inwards to form an annular shape, a plurality of groups of rope clamps are respectively clamped in the corresponding annular grooves and used for clamping a plurality of pipe dies inwards along the circumferential direction to seal the plastic pipe die, and the rope clamps at the top end are also connected with the steel bar columns to suspend the plastic pipe die; the pipe die supporting frame is supported on the structural surface and is arranged outside the plastic pipe die in a surrounding manner so as to be used for inwards clamping a plurality of pipe dies to seal the plastic pipe die.

Further, the plastic pipe die is a corrugated pipe prepared from plastic materials; the corrugated groove on the outer wall surface of the corrugated pipe forms an annular groove; the corrugated pipe is split into two pipe mold pieces along the circumferential direction.

Further, a release agent layer formed by brushing a release agent which is easy to release is provided on the inner wall surface of the bellows.

Further, the rope clamp comprises a steel wire rope clamped in a corrugated groove of the corrugated pipe and a clamp buckle for locking the steel wire rope; the rope clamp at the uppermost end is close to the top end of the corrugated pipe, and the rope clamp is adjustably connected with a preassembled flange preset at the top end of the reinforced column through a plurality of cables and hooks which are uniformly arranged along the circumferential direction.

Further, the plurality of groups of rope clamps are uniformly arranged at intervals along the height direction of the corrugated pipe.

Further, the overlooking projection of the pipe die support die frame is in a shape of a Chinese character 'jing'; the plastic pipe die is positioned at the center of the pipe die supporting frame which is arranged in a 'well' -shaped mode, and a plurality of pipe dies are clamped inwards through the pipe die supporting frame to seal the corrugated pipe.

Further, the pipe die support frame comprises four vertical support pipes vertically arranged at four crossing angles of the cross, and multi-layer transverse support frames sequentially arranged at intervals along the height direction of the vertical support pipes; each layer of transverse support comprises transverse support pipes which are sequentially arranged between two adjacent vertical support pipes, and a lock head which is used for fixing the two crossed transverse support pipes and the vertical support pipes into a whole; the corrugated pipes are clamped relatively through the transverse bracing pipes which are arranged in a pairwise opposite mode.

Further, the circular column formwork system also comprises a floor formwork which is arranged on the structural surface; the pipe mould formwork support is connected with the floor slab formwork support to form a full-hall type formwork support.

Further, the circular column formwork system further comprises an operation frame built at the top end of the full-hall formwork frame so as to support pouring personnel to perform concrete pouring from the top of the corrugated pipe.

Further, the steel bar column comprises a backing plate fixed on the structural surface, a steel bar cage which is bound to form a hollow column and is used for forming a circular column framework, and a positioning column rib used for positioning the steel bar cage; the positioning column ribs are vertically and fixedly supported on the backing plate; the reinforcement cage is vertically supported on the backing plate and sleeved on the outer circle of the positioning column ribs; the corrugated pipes are vertically sleeved outside the reinforcement cage at intervals.

The utility model has the following beneficial effects:

the novel circular column formwork system is developed aiming at the problems in the prior art, and a plastic pipe formwork formed by splicing large-diameter steel bar columns and a plurality of pipe mold sheets, a plurality of groups of rope clamps and a formwork system with fixed pipe formwork support frame are adopted, so that the plastic pipe formwork is light in weight and not easy to deform, is very convenient to transport and construct, and has lower installation cost compared with a wood formwork; during construction, plastic pipe molds can be erected according to the lofting positions, hoops are made by rope clamps to be fixed to the annular grooves, meanwhile, pipe mold supporting frames are clamped from outside to inside, concrete pouring is performed after installation, adjustment and reinforcement are performed, and the molds can be disassembled after maintenance reaches the demolding strength, so that the overall working time of supporting and disassembling the circular concrete pillars is greatly shortened, meanwhile, labor and material investment can be reduced, construction safety and reliability are guaranteed, and overall appearance and appearance are greatly improved.

The novel circular column formwork system is put into application in the construction project of China, the flatness of the concrete column surface constructed by utilizing the plastic pipe formwork is higher, complex external support is not needed, the cost is low, the dead weight is light, the effect is high, the seams are few, the stamping is not afraid, and the installation and the transportation are convenient; by utilizing the technical scheme, excessive manpower is not required, the operation is simple, and the plastic pipe die is very light and convenient to move, can be erected by a single person, can be installed by 3-4 persons, and reduces the labor intensity of operators, so that the use of a tower crane for installing and detaching is not required, and the mechanical investment is saved; the plastic pipe die can be sealed at one time, the length is not required to be increased, the working efficiency is improved, the efficiency can be improved by 3-4 times through preliminary measurement, the interface is not required to be pulled off by manpower during die stripping, the die stripping speed is obviously increased, and the turnover of the die plate is accelerated; the technology greatly shortens the construction period of template installation, saves the cost of manpower and material resources, improves the convenience of construction, accelerates the construction progress, obtains consistent and good comments of construction and establishment units, and has wide application and popularization prospects.

Compared with the existing shaping steel mould system, the novel circular column formwork system (1) can save construction period and increase efficiency: compared with the traditional building shaping steel template, when the novel formwork supporting system is constructed, the plastic pipe formwork is simple and convenient in construction process, light in material dead weight, free of mechanical hoisting during installation, and capable of improving the construction efficiency of the formwork by 3-4 times through actual measurement and calculation, accelerating the installation of the formwork, and greatly saving the construction period; (2) the cost is saved: the plastic pipe die has low cost, reduces the cost by 2/3 compared with the cost of direct material per meter of the steel large die plate, reduces the cost by 1/2 compared with the cost of the wood die plate, and greatly saves the construction cost by using the construction process in the construction process; (3) simple and convenient process and good sealing performance: the plastic pipe die is simple in structure, and the plastic pipe die is effectively prevented from leaking at joints by adopting a double-clamping sealing design of the inner rope clamp and the outer pipe die support die frame, so that the plastic pipe die meets the international sealing standard, only two vertical joints are left after construction, and no horizontal joint exists; (4) the appearance is good: the cylindrical appearance formed by using the plastic pipe die completely meets the requirements of bare concrete, and solves the quality common problem which can not be overcome by fine work.

Compared with the existing PVC pipe column formwork system, the novel circular column formwork system is wider in applicability: can be applied to the construction process of circular columns with the diameter of 400-1000 mm: (2) the deformation of the column die is small: because the rope clamp is used as the column clamp, the lateral pressure born by the column mould is larger, the deformation is smaller, and the appearance of the poured concrete column is more attractive; (3) the column die can be reused: saving materials, and being more economical and environment-friendly.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is an elevational schematic view of a circular column formwork system in accordance with a preferred embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic top view of the structure of FIG. 1;

fig. 4 is a schematic top view of a rebar column.

Description of the drawings

10. A steel bar column; 20. plastic pipe die; 30. rope clamp; 31. a wire rope; 32. a buckle; 40. a pipe die supporting frame; 41. a vertical supporting pipe; 42. a cross bracing tube; 43. a lock head; 50. structural surface.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.

Referring to fig. 1-3, a preferred embodiment of the present utility model provides a circular column formwork system comprising: the steel bar column 10, the plastic pipe die 20, the multi-group rope clamp 30 and the pipe die support die frame 40 are bound to form a concrete steel bar circular column with the poured concrete. The steel bar column 10 and the plastic pipe die 20 are vertically supported on the structural surface 50 respectively, the plastic pipe die 20 is sleeved outside the steel bar column 10, and the plastic pipe die 20 comprises a plurality of pipe dies which are sequentially arranged along the circumferential direction of the plastic pipe dies. The outer wall of the plastic pipe die 20 is also provided with annular grooves which are sequentially arranged along the height direction and respectively concaved inwards to form an annular shape, a plurality of groups of rope clamps 30 are respectively clamped in the corresponding annular grooves and used for clamping a plurality of pipe dies inwards along the circumferential direction to seal the plastic pipe die 20, and the rope clamps 30 at the top end are also connected with the reinforced bar column 10 to suspend the plastic pipe die 20. The tube die support is supported on the structural face 50 and is disposed around the exterior of the plastic tube die 20 for clamping the plurality of tube dies inwardly to seal the plastic tube die 20.

The utility model develops a circular column formwork system aiming at the problems existing in the prior art, adopts a plastic pipe formwork 20+a plurality of groups of rope hoops 30 and a formwork system fixed by a pipe formwork support 40 formed by splicing large-diameter steel bar columns 10+a plurality of pipe formworks, and has the advantages that the plastic pipe formwork 20 is light in weight and not easy to deform, is very convenient in transportation and construction, and has lower installation cost compared with a wood formwork; during construction, the plastic pipe die 20 can be erected according to the lofting position, hoops 30 are used for hooping and fixed to the annular grooves, meanwhile, the pipe die supporting die frame 40 is clamped from outside to inside, concrete pouring is carried out after installation, adjustment and reinforcement are carried out, and the die can be disassembled after maintenance reaches the die disassembling strength, so that the overall working time of supporting and disassembling the round concrete column is greatly shortened, meanwhile, labor and material investment can be reduced, the construction safety and reliability are guaranteed, and the overall appearance and appearance are greatly improved.

The novel circular column formwork system is put into application in the construction project of China, the flatness of the concrete column surface constructed by the plastic pipe formwork 20 is higher, complex external support is not needed, the cost is low, the dead weight is light, the effect is high, the seams are few, the stamping is not afraid, and the installation and the transportation are convenient; by utilizing the technical scheme, excessive manpower is not required, the operation is simple, and the plastic pipe die 20 is very light and convenient to move, can be erected by a single person, can be installed by 3-4 persons, and reduces the labor intensity of operators, so that the use of a tower crane for mounting and dismounting is not required, and the mechanical investment is saved; the plastic pipe die 20 can be sealed at one time without lengthening, so that the working efficiency is improved, the efficiency can be improved by 3-4 times through preliminary measurement, the interface is not required to be pulled off by manpower during die stripping, the die stripping speed is obviously increased, and the turnover of the die plate is accelerated; the technology greatly shortens the construction period of template installation, saves the cost of manpower and material resources, improves the convenience of construction, accelerates the construction progress, obtains consistent and good comments of construction and establishment units, and has wide application and popularization prospects.

Compared with the existing shaping steel mould system, the novel circular column formwork system (1) can save construction period and increase efficiency: compared with the traditional building shaping steel template, when the novel formwork system is constructed, the plastic pipe formwork 20 has simple construction process and light self weight of materials, mechanical hoisting is not needed during installation, and the construction efficiency of the formwork can be improved by 3-4 times through actual measurement and calculation, the formwork installation is quickened, and the construction period is greatly saved; (2) the cost is saved: the plastic pipe die 20 has low cost, reduces the cost by 2/3 compared with the cost of direct material per meter of a steel large die plate, reduces the cost by 1/2 compared with a wood die plate, and greatly saves the construction cost by using the construction process in the construction process; (3) simple and convenient process and good sealing performance: the plastic pipe die 20 is simple in structure, and the double clamping and sealing design of the inner rope clamp 30 and the outer pipe die support die frame 40 is adopted, so that the plastic pipe die 20 is effectively prevented from leaking at joints, the international sealing standard is met, only two vertical joints are left after construction, and no horizontal joint exists; (4) the appearance is good: the cylindrical appearance formed by the plastic pipe die 20 completely meets the requirements of bare concrete, and the quality common problem which can not be overcome by fine work is solved.

Compared with the existing PVC pipe column formwork system, the novel circular column formwork system is wider in applicability: can be applied to the construction process of circular columns with the diameter of 400-1000 mm: (2) the deformation of the column die is small: because the rope clamp 30 is adopted as the column clamp, the lateral pressure born by the column mould is larger, the deformation is smaller, and the appearance of the poured concrete column is more attractive; (3) the column die can be reused: saving materials, and being more economical and environment-friendly.

Alternatively, as shown in fig. 2 and 3, the plastic pipe die 20 is a bellows made of plastic material. In the alternative scheme, the plastic pipe die 20 is a high-wall high-strength composite plastic corrugated pipe formed by processing high-density polyethylene (HDPE) through a special process, and has the advantages of both a steel template and a wood template, so that the plastic pipe die 20 is very light and convenient to move, can be erected by a single person during installation, can be installed by 3-4 persons, reduces the labor intensity of operators, does not need to use a tower crane for installation and removal, and saves the mechanical investment; on the other hand, the corrugated pipe has low cost, the cost of direct material per meter is reduced by 2/3 compared with the steel large template, the cost is reduced by 1/2 compared with the wood template, and the corrugated pipe is used in the construction process, so that the construction cost can be greatly saved; in addition, the inner wall of the corrugated pipe is smooth and flat, so that the round column is attractive in appearance, the appearance of the round column completely meets the requirements of bare concrete, and the quality common problem which can not be overcome by fine work is solved. The corrugated groove on the outer wall surface of the corrugated pipe forms an annular groove, so that the annular groove is not required to be processed, the installation and positioning of the rope clamp 30 are facilitated while the structural strength and the rigidity are ensured, the rope clamp 30 is stably installed, and the plastic pipe die 20 is conveniently and better clamped. The corrugated pipe is split into two pipe die pieces in half along the circumferential direction, processing is simple, and the later stage of being convenient for is demolished, reduces the later stage and demolishs the degree of difficulty, and repeatedly usable after the demolding reduces construction cost, improves the efficiency of construction simultaneously.

Preferably, a release agent layer formed by brushing a release agent easy to release is arranged on the inner wall surface of the corrugated pipe, so that the later demolding and demolding are easy, and the demolding difficulty is reduced.

Alternatively, as shown in fig. 3, the rope clip 30 includes a wire rope 31 that is caught in a corrugated groove of the corrugated tube, and a catch 32 for locking the wire rope 31. The uppermost rope clip 30 is close to the top end of the corrugated pipe, and the rope clip 30 is adjustably connected with a pre-installed flange preset at the top end of the reinforcing bar column 10 through a plurality of cables and hooks uniformly arranged along the circumferential direction. In the alternative scheme, the perpendicularity of the corrugated pipe is adjusted by adjusting the tightness of the cable, so that the requirement of the perpendicularity of the template is met; meanwhile, the clamping buckles 32 can be adjusted to further adjust the tightening degree of the steel wire rope 31 on the corrugated pipe, so that the verticality of the circular column is rechecked and corrected in the pouring process and before the initial setting after the pouring is finished, and higher vertical precision is achieved. In the alternative scheme, the rope clamp 30 is adopted as the column clamp, so that the lateral pressure born by the column mould is larger, the deformation amount is smaller during concrete pouring, and the appearance of the poured concrete column is more attractive.

Preferably, the plurality of groups of rope clamps 30 are uniformly arranged at intervals along the height direction of the corrugated pipe, so that the column mould is uniformly hooped along the height direction, and the forming quality of the concrete column is further improved.

Alternatively, as shown in FIG. 3, the tube mold support 40 has a "well" shape in plan view. The plastic pipe die 20 is positioned at the center of a pipe die support 40 arranged in a 'well' shape, and a plurality of pipe dies are clamped inwards by the pipe die support 40 to seal the corrugated pipe. In this alternative, the pipe mold support 40 is not only used to clamp the pipe mold sheet inwards to further seal the corrugated pipe, preventing the joint leakage of the corrugated pipe, but also has a large bearing safety factor, and can increase the stability of the column mold system.

In this alternative, as shown in fig. 3, the pipe die support frame 40 includes four vertical supporting pipes 41 vertically disposed at four corners of the "well" shape, and multi-layer transverse supporting frames sequentially disposed at intervals along the height direction of the vertical supporting pipes 41. Each layer of transverse support comprises transverse support pipes 42 which are sequentially arranged between two adjacent vertical support pipes 41, and a lock head 43 for fixing the two transverse support pipes 42 and the vertical support pipes 41 which are intersected into a whole. The bellows are clamped against each other by means of two cross-support tubes 42 arranged in pairs. The pipe die support die frame 40 is simple in structure and easy to construct.

Preferably, the circular column formwork system further comprises a floor formwork which is laid on the structural face 50. The pipe formwork support 40 is connected with the floor slab support to form a full-hall type support, so that the bearing safety coefficient of the pipe formwork support 40 is further improved, and the column formwork system is supported more stably.

Preferably, the circular column formwork system further comprises an operation frame built at the top end of the full-hall formwork frame, so that pouring personnel can be supported to pour concrete from the top of the corrugated pipe, and pouring convenience is improved.

Alternatively, as shown in fig. 1 and 4, the reinforcement bar 10 includes a spacer plate fixed to the structural surface 50, a reinforcement cage bound to form a hollow column and used for forming a circular column skeleton, and a positioning column rib for positioning the reinforcement cage. The positioning column ribs are vertically and fixedly supported on the backing plate. The reinforcement cage is vertically supported on the backing plate and sleeved on the outer circle of the positioning column rib. The corrugated pipes are vertically sleeved outside the reinforcement cage at intervals. In this alternative, the reinforcement bar 10 is simple in structural setup and easy to erect, and the reinforcement bar 10 is used to form a concrete reinforcement bar circular column with the poured concrete.

When the circular column formwork system is adopted for pouring and forming the circular column, the method specifically comprises the following steps:

1) Binding a reinforcement cage, concealing and checking, cleaning the column roots of the plastic pipe die 20, and leveling the ground by using mortar;

2) The plastic pipe die 20 is uniformly coated with a release agent before assembly, which facilitates the disassembly process;

3) And (3) template positioning: setting a cross top die or a positioning column rib at the lower opening of the reinforcement cage according to a line, and padding a wood block under the cross top die or the positioning column rib, and ensuring the position of the template after adjustment;

4) And (3) template installation: the corrugated pipe is cut into two halves along the joint mark of the material by a cutting machine, and the two halves are respectively numbered, so that two templates are ensured to be matched for use all the time in turnover; when the template is installed, after the two semicircles are assembled, the two semicircles are arranged around the concave part of the corrugated pipe by using a steel wire rope 31 and fixed by using a buckle 32, and the inner side of the pipe die piece is brushed with a release agent;

5) And (3) adjusting the perpendicularity of the template: the method comprises the steps that a flange is preassembled at the top end of a reinforcement cage in the corrugated pipe installation process, the upper end of a steel wire cable is connected with the preassembled flange on the reinforcement cage through a hook, and if the perpendicularity of the corrugated pipe does not meet the requirement, the cable is adjusted to meet the perpendicularity requirement of the corrugated pipe;

6) Concrete pouring and correction verticality:

(1) and (3) concrete pouring: before pouring, the concrete needs to be firstly erected with an independent operation frame, when the concrete is put into a mould, the free height is less than 2m, and if the free height exceeds 2m, a string cylinder is adopted to prevent the concrete from segregation; the concrete vibrating rod cannot touch the reinforced bar column 10 and the corrugated pipe when vibrating, and the pouring height of each layer is 500-600 mm;

(2) correcting verticality: during the pouring process of the concrete and before the initial setting after the pouring is finished, the verticality of the circular column can be rechecked and corrected at any time, and higher vertical precision can be obtained by finely adjusting the flange bolts of the buckles 32;

7) Removing the die:

the column mould can be dismantled when the strength of the round column meets the standard requirement, and concrete is maintained according to the standard requirement; when the die is disassembled, column foot mortar is firstly chiseled, then the steel wire rope 31 is disassembled, after the bound steel wire rope 31 is loosened, the pipe die piece is automatically sprung from the joint, the pipe die piece is manually disassembled, and the pipe die piece with local damage can be reused after being repaired.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A circular column formwork system comprising:

binding steel bar columns (10) which are formed to form concrete steel bar round columns with poured concrete, a plastic pipe die (20) for supporting the round columns, a plurality of groups of rope clamps (30) and pipe die supporting die frames (40);

the steel bar column (10) and the plastic pipe die (20) are respectively vertically supported on the structural surface (50), the plastic pipe die (20) is sleeved outside the steel bar column (10), and the plastic pipe die (20) comprises a plurality of pipe dies which are sequentially arranged along the circumferential direction of the plastic pipe dies;

the outer wall of the plastic pipe die (20) is also provided with annular grooves which are sequentially arranged along the height direction and are respectively concaved inwards to form an annular shape, a plurality of groups of rope clamps (30) are respectively clamped in the corresponding annular grooves and are used for clamping a plurality of pipe die pieces inwards along the circumferential direction to seal the plastic pipe die (20), and the rope clamps (30) at the top end are also connected with the reinforced bar column (10) to suspend the plastic pipe die (20);

the pipe die supporting frame is supported on the structural surface (50) and is arranged outside the plastic pipe die (20) in a surrounding mode, so that a plurality of pipe die pieces are clamped inwards to seal the plastic pipe die (20).

2. A circular column formwork system as claimed in claim 1, wherein,

the plastic pipe die (20) is a corrugated pipe prepared from plastic materials;

the corrugated groove on the outer wall surface of the corrugated pipe forms the annular groove;

the corrugated pipe is split into two pipe die pieces in half along the circumferential direction.

3. A circular column formwork system as claimed in claim 2, wherein,

and a release agent layer formed by brushing a release agent easy to release is arranged on the inner wall surface of the corrugated pipe.

4. A circular column formwork system as claimed in claim 2, wherein,

the rope clamp (30) comprises a steel wire rope (31) clamped in a corrugated groove of the corrugated pipe and a buckle (32) used for locking the steel wire rope (31);

the uppermost rope clamp (30) is close to the top end of the corrugated pipe, and the rope clamp (30) is connected with a preset preassembled flange at the top end of the reinforced column (10) in an adjustable mode through a plurality of cables and hooks which are uniformly arranged along the circumferential direction.

5. A circular column formwork system as claimed in claim 2, wherein,

the plurality of groups of rope clamps (30) are uniformly arranged at intervals along the height direction of the corrugated pipe.

6. A circular column formwork system as claimed in claim 2, wherein,

the overlooking projection of the pipe die support die frame (40) is in a shape of a Chinese character 'jing';

the plastic pipe die (20) is positioned at the center of the pipe die support die frame (40) which is arranged in a 'well' -shaped mode, and a plurality of pipe die pieces are clamped inwards through the pipe die support die frame (40) to seal the corrugated pipe.

7. The circular column formwork system as in claim 6, wherein,

the pipe die support frame (40) comprises four vertical supporting pipes (41) vertically arranged at four crossing angles of the 'well' -shaped, and

multi-layer cross brackets are sequentially arranged at intervals along the height direction of the vertical supporting pipe (41);

each layer of transverse support comprises transverse support pipes (42) which are sequentially arranged between two adjacent vertical support pipes (41), and a lock head (43) for fixing the two crossed transverse support pipes (42) and the vertical support pipes (41) into a whole;

the corrugated pipes are clamped relatively by the cross brace pipes (42) which are arranged in a pairwise opposite mode.

8. A circular column formwork system as claimed in claim 2, wherein,

the circular column formwork system further comprises a floor formwork which is arranged on the structural surface (50);

and the pipe die supporting frame (40) is connected with the floor slab supporting frame to form a full-hall supporting frame.

9. The circular column formwork system as in claim 8, wherein,

the circular column formwork system further comprises an operation frame built at the top end of the full-hall formwork frame, so that pouring personnel are supported to pour concrete from the top of the corrugated pipe.

10. A circular column formwork system as claimed in claim 2, wherein,

the steel bar column (10) comprises a backing plate fixed on the structural surface (50), a steel bar cage which is bound to form a hollow column and is used for forming the circular column framework, and a positioning column rib used for positioning the steel bar cage;

the positioning column ribs are vertically and fixedly supported on the backing plate;

the steel reinforcement cage is vertically supported on the backing plate and sleeved on the outer circle of the positioning column ribs;

the corrugated pipes are vertically sleeved outside the reinforcement cage at intervals.