Construction method for casting barrel structure in situ by utilizing barrel formwork system

Abstract

The construction method for cast-in-place of the barrel structure through the barrel formwork system aims at solving the problems that when a conventional formwork system is used for constructing the barrel structure, the turnover use difficulty is large, the construction period is long, and the manpower consumption is large. The method comprises the following steps that an overall jacking steel platform jacks a cylinder formwork system to a current floor of a to-be-poured cylinder structure, a control unit drives a lead screw of a power telescopic mechanism to extend, so that a side formwork assembly and an angle formwork assembly are assembled, concrete of the cylinder structure is poured, and after the strength required by design is achieved, the control unit drives the lead screw of the power telescopic mechanism to contract, and the concrete is poured; and the operation is repeated in this way, and concrete pouring construction of the barrel structure is completed layer by layer.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering equipment, and in particular to a construction method for a cast-in-place cylinder structure using a cylinder formwork system. Background Art

[0002] At present, when constructing cylinder structures such as elevator shafts, conventional formwork systems such as loose formwork and integral lifting formwork are usually used for cast-in-place concrete construction. However, conventional formwork systems have disadvantages such as complex assembly and inability to automatically open and close the formwork during the construction of cylinder structures, which makes it difficult to use the formwork system, long construction period, and high labor consumption. Summary of the invention

[0003] The conventional formwork system is used to construct the cylindrical structure, but there are problems such as difficulty in turnover, long construction period and high manpower consumption. The purpose of the present invention is to provide a construction method for a cast-in-place cylindrical structure using a cylindrical formwork system.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a construction method for a cast-in-place cylinder structure using a cylinder formwork system, wherein the cylinder formwork system includes a support frame, a cantilever device, a demolding device, a side mold assembly, a corner mold assembly and a connecting piece; the support frame is vertically arranged and connected to the top of the integral jacking steel platform, the side mold assembly and the corner mold assembly are arranged between the cylinder structure to be cast and the support frame, and the corner mold assembly is arranged at the corner of the cylinder structure to be cast; a plurality of cantilever devices are arranged circumferentially along the support frame, one end of the cantilever device is connected to the support frame, and the other end thereof is connected to the side mold assembly; a plurality of demolding devices are vertically and spaced apart at the bottom of each cantilever device, one end of the demolding device is connected to the support frame, and the other end thereof is connected to the side mold assembly; the connecting piece includes a slide rail connected to the corner mold assembly, and two sliders connected to the ends of the side mold assemblies on both sides of the corner mold assembly, the two sliders are buckled in the slide rail and can slide in relative or opposite directions along the slide rail, so that the side mold assembly can drive the corner mold assembly to close and demold synchronously; the steps are as follows:

[0005] S1: The overall lifting steel platform lifts the cylinder formwork system to the current floor of the cylinder structure to be cast, the control unit drives the screw rod of the power telescopic mechanism of the demoulding device to extend, pushes the side form assembly and the corner form assembly to close the mold, fine-tunes the power telescopic mechanism to accurately adjust the horizontal position of the side form assembly and the corner form assembly, adjusts the cantilever beam height of the cantilever device to accurately adjust the height of the side form assembly and the corner form assembly, and casts concrete after the side form assembly and the corner form assembly are closed;

[0006] S2: After the concrete of the current floor of the cylinder structure reaches the design strength, the control unit drives the screw of the power telescopic mechanism to retract, so that the side formwork assembly drives the corner formwork assembly to withdraw synchronously;

[0007] S3: Repeat steps S1 to S2 to complete the concrete pouring construction of the cylinder structure layer by layer.

[0008] The construction method of the cast-in-place cylindrical structure using the cylindrical formwork system of the present invention comprises the following steps: first, the cylindrical formwork system is lifted by an integral jacking steel platform to the current floor where the cylindrical structure is to be cast, and a control unit drives the screw rod of the power telescopic mechanism to extend so that the side formwork assembly and the corner formwork assembly are molded together. After the concrete of the cylindrical structure is cast and reaches the strength required by the design, the control unit drives the screw rod of the power telescopic mechanism to contract so that the side formwork assembly drives the corner formwork assembly to synchronously withdraw the formwork, and this process is repeated to complete the concrete casting construction of the cylindrical structure layer by layer; the corner formwork assembly cooperates with the side formwork assembly through a slide rail and a slider structure, and the side formwork assembly drives the corner formwork assembly to synchronously open and close the formwork, and the relative movement form between the two is sliding, thereby ensuring the integrity of the formwork system; compared with the conventional relative movement mode of hard friction contact, the slide rail and the slider structure make the relative movement of the corner formwork assembly and the side formwork assembly smoother, thereby ensuring the synchronization of opening and closing of the side formwork assembly and the corner formwork assembly, and thereby helping to ensure the molding quality of the concrete casting of the cylindrical structure. The construction method can effectively save labor, greatly reduce labor intensity, and meet the goal of building industrialization.

[0009] Furthermore, the demolding device includes a demolding beam, a power telescopic mechanism, a connecting rod and a control unit. The power telescopic mechanism includes a driving device and a screw rod connected to each other. One end of the connecting rod is vertically connected to the vertical rod of the support frame, and the driving device is connected to the other end of the connecting rod. The screw rod is connected to the pin shaft of the demolding beam. The demolding beam is fitted on the inner side of the side mold assembly and connected to its pin shaft. The driving device is connected to the control unit signal. The driving device drives the screw rod to telescope, thereby driving multiple side mold assemblies to synchronously close and demold.

[0010] Furthermore, the cross-section of the corner mold assembly is an isosceles right triangle, and the slide rail is transversely arranged and bolted to the diagonal rod of the corner mold assembly.

[0011] Furthermore, the side mold assembly includes a standard mold unit and a bending portion with an L-shaped cross-section symmetrically arranged at both ends thereof, one end of the bending portion is bolted to the end of the standard mold unit, and the other end of the bending portion is arranged parallel to the diagonal rod of the corner mold assembly and bolted to a slider, and the sliders on the side mold assemblies on both sides of the corner mold assembly are snap-connected to the slide rails.

[0012] Furthermore, the cantilever device includes a cantilever beam, a suspension beam, a support bearing and a downward pressure bearing. The support bearing includes a base, a sleeve connected to the base, and a first bearing connected to the bottom of the sleeve with a pin shaft. One end of the cantilever beam passes through the sleeve and is supported on the first bearing. The downward pressure bearing includes a U-shaped bracket, an adjustable screw connected to the top of the bracket, a second bearing and an axis pressure block arranged at the bottom of the adjustable screw and connected to the bracket pin shaft. The other end of the cantilever beam passes through the bracket and is located at the bottom of the second bearing and the axis pressure block. The support bearing and the downward pressure bearing are both bolted to the support frame. The suspension beam is fitted and pin-connected to the side mold assembly. A pin hole 1 is provided at the end of the cantilever beam close to the side mold assembly. The cantilever beam is pin-connected to the suspension beam, and a stopper is installed in pin hole 2 at the other end of the cantilever beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a cylinder mold frame system according to an embodiment of the present invention;

[0014] Figure 2 for Figure 1 Side view of

[0015] Figure 3 A schematic diagram of a cylinder mold frame system in a mold closing state according to an embodiment of the present invention;

[0016] Figure 4 A schematic diagram of a cylinder mold frame system in a demoulding state according to an embodiment of the present invention;

[0017] Figure 5 A schematic diagram of the connection relationship between the side mold assembly and the corner mold assembly in one embodiment of the present invention;

[0018] Figure 6 for Figure 5 Side view of

[0019] Figure 7 This is a schematic structural diagram of a corner mold assembly in one embodiment of the present invention;

[0020] Figure 8 This is a schematic diagram of the structure of a connecting member in one embodiment of the present invention;

[0021] Figures 9 to 12 It is a schematic diagram of each step of the construction method of the cast-in-place cylinder structure using the cylinder formwork system of the present invention.

[0022] The numbers in the figure are as follows:

[0023] Cast cylinder structure 1; proposed cast cylinder structure 2; integral jacking steel platform 5; support frame 10; cantilever device 20; cantilever beam 21; downward pressure support 24; support support 25; suspension beam 26; demoulding device 30; demoulding beam 31; drive device 32; connecting rod 34; screw rod 35; control unit 36; side mold assembly 40; standard template unit 41; bending part 42; slider 45; corner mold assembly 50; diagonal rod 52; slide rail 54. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the drawings, but this cannot be a limitation of the technical solution of the present invention.

[0025] Combination Figures 1 to 12 The construction method of the cast-in-place cylinder structure using the cylinder formwork system of the present invention is described, wherein the cylinder formwork system comprises a support frame 10, a cantilever device 20, a mold withdrawal device 30, a side form assembly 40, a corner form assembly 50 and a connecting piece; an integral jacking steel platform 5 is supported on the cast cylinder structure 1, the support frame 10 is vertically arranged and connected to the top of the integral jacking steel platform 5, the side form assembly 40 and the corner form assembly 50 are arranged between the cylinder structure 2 to be cast and the support frame 10, and the corner form assembly 50 is arranged at the corner of the cylinder structure 2 to be cast; a plurality of cantilever devices 20 are arranged along the circumference of the support frame 10, such as Figure 3 As shown, two cantilever devices 20 are symmetrically arranged along the axis on each side of the support frame 10, one end of the cantilever device 20 is connected to the support frame 10, and the other end thereof is connected to the side mold assembly 40; Figure 1 As shown, a plurality of demoulding devices 30 are vertically and spaced apart at the bottom of each cantilever device 20, one end of the demoulding device 30 is connected to the support frame 10, and the other end thereof is connected to the side mold assembly 40, so that the four side mold assemblies 40 enclosed on the outside of the support frame 10 are detachably connected to the support frame 10 through the cantilever device 20 and the demoulding device 30; the connecting member includes a slide rail 54 connected to the corner mold assembly 50, and two sliders 45 connected to the ends of the side mold assemblies 40 on both sides of the corner mold assembly 50, the two sliders 45 are buckled on the slide rail 54 and can slide in relative or opposite directions along the slide rail 54, so that the side mold assembly 40 can drive the corner mold assembly 50 to close and demould synchronously;

[0026] The specific steps of the construction method are as follows:

[0027] S1: Fig. 9As shown, after checking that the lifting path is unobstructed, the integral lifting steel platform 5 lifts the barrel formwork system to the current floor of the barrel structure 2 to be cast, the control unit 36 ​​drives the screw rod 35 of the power telescopic mechanism to extend, pushes the side mold assembly 40 and the corner mold assembly 50 to close the mold, fine-tunes the power telescopic mechanism of the demoulding device 30 to ensure that the horizontal positions of the side mold assembly 40 and the corner mold assembly 50 are accurate, and adjusts the height of the cantilever beam 21 of the cantilever device 20 to ensure that the height of the side mold assembly 40 and the corner mold assembly 50 is accurate; as shown in FIG. Fig.10 As shown, hoist the steel cage or tie the steel bars, install the outer formwork of the current floor of the cylindrical structure 2 to be cast, install the transverse back ribs and tie rods, and pour the concrete after the formwork system is closed;

[0028] S2: Fig.11 As shown, after the concrete of the current floor of the cylindrical structure reaches the strength required by the design, the tie rods, the transverse back ribs and the outer formwork are removed, and the control unit 36 ​​drives the screw rod 35 of the power telescopic mechanism to contract, so that the side formwork assembly 40 drives the corner formwork assembly 50 to withdraw the form synchronously;

[0029] S3: Fig.12 As shown, the steps S1 to S2 are repeated to complete the concrete pouring construction of the cylinder structure layer by layer.

[0030] The construction method of the cast-in-place cylindrical structure using the cylindrical formwork system of the present invention is as follows: first, the integral jacking steel platform 5 jacks up the cylindrical formwork system to the current floor where the cylindrical structure 2 is to be cast, and the control unit 36 ​​drives the screw rod 35 of the power telescopic mechanism to extend so that the side form assembly 40 and the corner form assembly 50 are molded together. After the concrete of the cylindrical structure is cast and reaches the strength required by the design, the control unit 36 ​​drives the screw rod 35 of the power telescopic mechanism to contract so that the side form assembly 40 drives the corner form assembly 50 to be synchronously withdrawn, and this is repeated to complete the concrete pouring construction of the cylindrical structure layer by layer; the corner form assembly 50 is connected to the cylindrical structure through the slide rail. The structure of the slide rail 54 and the slide block 45 cooperates with the side formwork assembly 40, and the side formwork assembly 40 drives the corner formwork assembly 50 to open and close the mold synchronously. The relative movement between the two is in the form of sliding, which ensures the integrity of the formwork system. Compared with the conventional relative movement mode of hard friction contact, the structure of the slide rail 54 and the slide block 45 makes the relative movement of the corner formwork assembly 50 and the side formwork assembly 40 smoother, ensuring the synchronization of the opening and closing of the side formwork assembly 40 and the corner formwork assembly 50, which is beneficial to ensuring the molding quality of the concrete pouring of the cylindrical structure. This construction method can effectively save labor, greatly reduce labor intensity, and meet the goal of building industrialization.

[0031] like Figure 1As shown, the cantilever device 20 includes a cantilever beam 21, a suspension beam 26, a support bracket 25 and a downward pressure bracket 24. The support bracket 25 includes a base, a sleeve connected to the base, and a first bearing connected to the bottom of the sleeve by a pin. One end of the cantilever beam 21 passes through the sleeve and is supported on the first bearing. The downward pressure bracket 24 includes a U-shaped bracket, an adjustable screw connected to the top of the bracket, a second bearing and an axial pressure block arranged at the bottom of the adjustable screw and connected to the bracket pin. The other end of the cantilever beam 21 passes through the bracket and is located between the second bearing and the axial pressure block. At the bottom of the block, the support bracket 25 and the downward pressure bracket 24 are both bolted to the support frame 10, the suspension beam 26 is fitted with the side mold assembly 40 and connected by a pin, the end of the cantilever beam 21 close to the side mold assembly 40 is provided with a pin hole 1, the cantilever beam 21 is pin-connected to the suspension beam 26, a stopper is installed in the pin hole 2 at the other end of the cantilever beam 21, and the adjustable screw is rotated downward to push the second bearing and the shaft pressure block to move along the Y-axis direction, so that the cantilever beam 21 can carry the side mold assembly 40 to rotate in the XY plane around the first bearing of the support bracket 25. The cantilever beam 21 carries the deadweight of the side mold assembly 40, and the cantilever beam 21 can be used to cooperate with the side mold assembly 40 to slide and fine-tune the height of the side mold assembly 40.

[0032] like Figure 1 As shown, the mold removal device 30 includes a mold removal beam 31, a power telescopic mechanism, a connecting rod 34 and a control unit 36. The power telescopic mechanism includes a driving device 32 and a screw rod 35 connected to each other. One end of the connecting rod 34 is vertically connected to the vertical rod of the support frame 10, and the driving device 32 is connected to the other end of the connecting rod 34. The screw rod 35 is connected to the mold removal beam 31 with a pin. The mold removal beam 31 is fitted on the inner side of the side mold assembly 40 and connected to its pin. The driving device 32 is connected to the control unit 36 ​​by signal. The driving device 32 drives the screw rod 35 to telescope, driving multiple side mold assemblies 40 to synchronously close and remove the mold. The power telescopic mechanism of this embodiment is a hydraulic cylinder or a mechanical mechanism.

[0033] like Figures 5 to 8As shown, the cross section of the corner mold assembly 50 is an isosceles right triangle, the slide rail 54 is transversely arranged and bolted to the diagonal rod 52 of the corner mold assembly 50, the side mold assembly 40 includes a standard template unit 41, and a bending portion 42 with an L-shaped cross section symmetrically arranged at both ends thereof, one end of the bending portion 42 is bolted to the end of the standard template unit 41, and the other end of the bending portion 42 is arranged parallel to the diagonal rod 52 of the corner mold assembly 50 and bolted to a slider 45, and the sliders 45 on the side mold assemblies 40 on both sides of the corner mold assembly 50 are snap-connected to the slide rail 54. The corner mold assembly 50 cooperates with the side mold assembly 40 through the slide rail 54 and the slider 45 structure, and the deadweight of the corner mold assembly 50 is transmitted to the side mold assembly 40 through the slide rail 54 and the slider 45 structure. Finally, the deadweight of the two is transmitted to the support frame 10 through the cantilever device 20, and the support frame 10 then transmits the load to the integral jacking steel platform 5 at its bottom, thereby ensuring the stability of the cylinder mold frame system. When the side mold assembly 40 moves to close or withdraw the mold, the slider 45 connected to the side mold assembly 40 slides along the slide rail 54 of the corner mold assembly 50. The corner mold assembly 50 and the side mold assembly 40 can only slide relative to each other, and other directions are constrained, so that the side mold assembly 40 can drive the corner mold assembly 50 to close or withdraw the mold synchronously, thereby realizing the automatic opening and closing of the template system.

[0034] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of the claims.

Claims

1. A construction method for a cast-in-place cylinder structure using a cylinder formwork system, characterized in that: The cylinder formwork system comprises a support frame, a cantilever device, a demoulding device, a side mold assembly, a corner mold assembly and a connecting piece; the support frame is vertically arranged and connected to the top of the integral jacking steel platform, the side mold assembly and the corner mold assembly are arranged between the cylinder structure to be cast and the support frame, and the corner mold assembly is arranged at the corner part of the cylinder structure to be cast; a plurality of cantilever devices are arranged circumferentially along the support frame, one end of the cantilever device is connected to the support frame, and the other end thereof is connected to the side mold assembly; a plurality of demoulding devices are vertically and spaced apart at the bottom of each cantilever device, one end of the demoulding device is connected to the support frame, and the other end thereof is connected to the side mold assembly; the connecting piece comprises a slide rail connected to the corner mold assembly, and two sliders connected to the ends of the side mold assemblies on both sides of the corner mold assembly, the two sliders are buckled in the slide rail and can slide in relative or opposite directions along the slide rail, so that the side mold assembly can drive the corner mold assembly to close and demould synchronously; the steps are as follows: S1: The overall lifting steel platform lifts the cylinder formwork system to the current floor of the cylinder structure to be cast, the control unit drives the screw rod of the power telescopic mechanism of the demoulding device to extend, pushes the side form assembly and the corner form assembly to close the mold, fine-tunes the power telescopic mechanism to accurately adjust the horizontal position of the side form assembly and the corner form assembly, adjusts the cantilever beam height of the cantilever device to accurately adjust the height of the side form assembly and the corner form assembly, and casts concrete after the side form assembly and the corner form assembly are closed; S2: After the concrete of the current floor of the cylinder structure reaches the design strength, the control unit drives the screw of the power telescopic mechanism to retract, so that the side formwork assembly drives the corner formwork assembly to withdraw synchronously; S3: Repeat steps S1 to S2 to complete the concrete pouring construction of the cylinder structure layer by layer.

2. The construction method of cast-in-place cylindrical structure using a cylindrical formwork system according to claim 1 is characterized in that: The demolding device includes a demolding beam, a power telescopic mechanism, a connecting rod and a control unit. The power telescopic mechanism includes a driving device and a screw rod connected to each other. One end of the connecting rod is vertically connected to the vertical rod of the support frame, and the driving device is connected to the other end of the connecting rod. The screw rod is connected to the pin shaft of the demolding beam. The demolding beam is fitted on the inner side of the side mold assembly and connected to its pin shaft. The driving device is connected to the control unit by signal. The driving device drives the screw rod to telescope, thereby driving multiple side mold assemblies to close and demold synchronously.

3. The construction method of cast-in-place cylindrical structure using a cylindrical formwork system according to claim 1 is characterized in that: The cross section of the corner mold assembly is an isosceles right triangle, and the slide rail is transversely arranged and bolted to the diagonal rod of the corner mold assembly.

4. The construction method of cast-in-place cylindrical structure using a cylindrical formwork system according to claim 3 is characterized in that: The side mold assembly includes a standard mold unit and a bending portion with an L-shaped cross-section symmetrically arranged at both ends thereof. One end of the bending portion is bolted to the end of the standard mold unit, and the other end of the bending portion is arranged parallel to the diagonal rod of the corner mold assembly and bolted to a slider. The sliders on the side mold assemblies on both sides of the corner mold assembly are snap-connected to the slide rails.

5. The construction method of cast-in-place cylindrical structure using a cylindrical formwork system according to claim 1, characterized in that: The cantilever device includes a cantilever beam, a suspension beam, a support and a downward pressure support. The support includes a base, a sleeve connected to the base, and a first bearing connected to the bottom of the sleeve with a pin shaft. One end of the cantilever beam passes through the sleeve and is supported on the first bearing. The downward pressure support includes a U-shaped bracket, an adjustable screw connected to the top of the bracket, a second bearing and an axis pressure block arranged at the bottom of the adjustable screw and connected to the bracket pin shaft. The other end of the cantilever beam passes through the bracket and is located at the bottom of the second bearing and the axis pressure block. The support and the downward pressure support are both bolted to the support frame. The suspension beam is fitted with the side mold assembly and connected with the pin shaft. The end of the cantilever beam close to the side mold assembly is provided with a pin hole 1. The cantilever beam is connected to the suspension beam pin shaft, and a stopper is installed in pin hole 2 at the other end of the cantilever beam.

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