The upper chamfered side formwork support system and construction method of hollow thin-wall high pier diaphragm

Abstract

The present invention provides a hollow thin-walled high pier diaphragm upper chamfer side formwork support system and construction method, which is suitable for the field of construction formwork engineering. The support system of the present invention includes a panel, a main rib, a back rib, a transverse support, a vertical support and a cross bar. The main rib is arranged on the panel parallel to the short side of the panel, and the back rib is arranged perpendicular to the main rib at the upper and lower ends of the main rib. A transverse support is arranged in the middle of the symmetrical back ribs. The transverse support is connected to the vertical support in the vertical direction. The vertical support passes through the diaphragm through a sleeve and is connected to the main distribution beam supporting the bottom formwork of the diaphragm. The cross bar is perpendicular to the transverse support and the vertical support at the same time, connecting the entire support system into one. The support system and construction method of the present invention provide effective vertical constraints and lateral constraints, and ensure that the upper chamfer is cast and formed in one time with a stable support system. By adding vibrating transmission steel bars, the concrete is vibrated and compacted to avoid subsequent repairs and reduce construction costs.

Description

Technical Field

[0001] The invention relates to a chamfered side formwork support system for an upper portion of a hollow thin-wall high pier diaphragm and a construction method, and is suitable for the field of construction formwork engineering. Background Art

[0002] Hollow thin-walled high piers are widely used in mountain bridge construction projects because they can effectively reduce the deadweight of the structure and improve the structural stability. As a transverse structure connecting the pier body, the diaphragm plays a vital role in improving the overall structural rigidity. However, the chamfer design of the diaphragm not only optimizes the structural stress, but also brings inconvenience to the construction. In particular, the chamfer of the upper part of the diaphragm has a large inclination. The concrete flow and viscosity alone cannot ensure that the concrete structure contour meets the requirements of the design drawings.

[0003] The current construction technology is to use side formwork to cover the chamfered position of the upper part of the diaphragm, and then set a transverse support in the middle of the formwork, and use the steel bars of the diaphragm to keep the formwork stable during the concrete pouring process. Since the chamfered support system on the upper part of the diaphragm lacks effective vertical and lateral constraints, the transverse support is easily displaced under the influence of vibration during the concrete pouring and vibration process, causing the formwork to be lifted or offset, affecting the quality of concrete pouring. In addition, since the side formwork completely covers the chamfered slope, it is difficult for the vibrator to extend into the chamfered position, and the concrete under the formwork is difficult to vibrate and compact, further affecting the pouring quality. Although it can be repaired after the formwork is removed, it delays the progress of the project and increases construction costs. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the traditional chamfered side formwork support system on the upper part of the diaphragm lacks effective vertical and lateral constraints and the concrete under the side formwork is difficult to vibrate and compact. A hollow thin-walled high pier diaphragm upper chamfered side formwork support system and a chamfering construction method for the upper part of the diaphragm are provided. The system has the advantages of one-time casting and forming without repair, reducing construction costs and ensuring construction progress, and can be widely used in the field of construction formwork engineering.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A hollow thin-walled high pier diaphragm upper chamfered side formwork support system, comprising a panel 7, a main rib 6, a back rib 3, a transverse support 4, a vertical support 5 and a cross bar 8, wherein the panel 7 is covered on the chamfered steel bars at the upper part of the diaphragm and is separated from the transverse steel bars 9 by a concrete pad 2, the main rib 6 is arranged on the panel 7 parallel to the short side, the back rib 3 is arranged perpendicular to the main rib 6 at the upper and lower ends of the main rib 6, the chamfer of the upper part of the diaphragm is symmetrical, the panel 7, the main rib 6 and the back rib 3 are also arranged symmetrically, a transverse support 4 is arranged in the middle of the symmetrical back rib 3, the transverse support 4 is connected to the vertical support 5 in the vertical direction, the vertical support 5 passes through the diaphragm through a sleeve 15 and is connected to the main distribution beam 13 of the diaphragm bottom formwork support, and the cross bar 8 is perpendicular to the transverse support 4 and the vertical support 5 at the same time, connecting the entire support system into one.

[0007] As a preferred technical solution of the present invention, a steel bar groove is provided at the center of one side of the concrete pad 3, and the concrete pad 2 is buckled onto the transverse steel bar 9 through the groove when in use.

[0008] As a preferred technical solution of the present invention, the vertical support 5 and the main distribution beam 13 supported by the bottom formwork of the diaphragm are cross-connected by setting steel pipes at the four corners. The steel pipes are connected to the vertical support 5 with double fasteners and tightly embrace the main distribution beam 13 supported by the bottom formwork of the diaphragm.

[0009] A construction method for a chamfered side formwork support system for an upper portion of a hollow thin-walled high pier diaphragm, specifically comprising the following steps:

[0010] S101 diaphragm bottom formwork and upper chamfered side formwork support design;

[0011] The support design of the bottom formwork and the upper chamfered side formwork of the diaphragm includes calculating the required thickness of the panel 7, the spacing between the main ribs 6 and the back ribs 3 before the construction section before the diaphragm begins, according to the construction load of the bottom formwork and the upper chamfered side formwork, the concrete dumping load, the concrete vibration load, the concrete deadweight and the deadweight of the support system, and then determining the specifications of the embedded parts 12 supporting the overall support system;

[0012] S102 embedded parts arrangement;

[0013] The embedded parts arrangement includes arranging the embedded parts 12 after the reinforcement of the previous construction segment of the diaphragm is tied, the embedded parts 12 are arranged on the two long sides of the cross section of the hollow thin-walled high pier, and then the mold is closed and concrete is poured. After the concrete reaches a predetermined strength, the diaphragm segment is constructed;

[0014] S103 diaphragm bottom formwork construction;

[0015] The construction of the bottom formwork of the diaphragm includes welding angle steels 11 along the two long sides of the cross section of the hollow thin-walled high pier on the embedded parts 12 buried in the previous construction section, and then erecting the main distribution beam 13 supported by the bottom formwork on the angle steels 11, and the bottom formwork support system is erected on the main distribution beam 13, and then laying the bottom formwork on the bottom formwork support system, making a hole in the bottom formwork, and setting a sleeve 15 at the position of the hole, and then the vertical support 5 of the chamfered side formwork of the upper part of the diaphragm passes through the sleeve 15 and the hole to connect with the main distribution beam 13 supported by the bottom formwork;

[0016] Construction of chamfered side formwork on the upper part of S104 transverse partition;

[0017] The construction of the chamfered side formwork at the upper part of the diaphragm includes the tying of the diaphragm reinforcement bars. After the tying of the reinforcement bars is completed, a concrete pad 2 is placed on the transverse reinforcement bars 9 on the chamfered inclined surface of the upper part of the diaphragm, and a vibrating transfer reinforcement bar 10 is arranged along the direction of the transverse reinforcement bars 9. The main ribs 6 and the back ribs 3 are arranged at intervals according to the calculation, the main ribs 6 and the panel 7 are nailed, and the back ribs 3 and the main ribs 6 are nailed, and then the panel 7 is covered on the chamfered inclined surface of the upper part of the diaphragm. A transverse support 4 is arranged between the back rib 3 and the back rib 3 of the chamfered side formwork on the other side, and the transverse support steel pipe 40 is twisted so that the transverse support 4 supports the back ribs 3 at both ends through the adjustable support 41, and then the transverse support 4 is connected to the vertical support 5 through the cross bar 8;

[0018] S105 concrete pouring and formwork removal and curing;

[0019] The concrete pouring and demolding and curing include pouring concrete after the construction of the chamfered side formwork on the upper part of the diaphragm is completed. During the pouring process, the steel bars 10 are vibrated and transferred by a vibrator. During the upper chamfering vibration process, the vibrator needs to be placed in the vibrator placement sleeve 102 to vibrate the concrete under the chamfered side formwork on the upper part of the diaphragm to make it dense. After the concrete reaches a predetermined strength, the formwork is removed and the concrete is watered and cured.

[0020] As a preferred technical solution of the present invention, in step S104, the vibration transfer steel bar 10 includes a steel bar vertical section 100, a steel bar straight section 101 and a vibrator placement sleeve 102, the vibration action range of the steel bar vertical section 100 is 8 times the steel bar diameter, the spacing between adjacent steel bar vertical sections 100 does not exceed 12 times the steel bar diameter, and the arrangement spacing of the vibration transfer steel bars 10 along the direction of the transverse steel bar 9 does not exceed 12 times the steel bar diameter.

[0021] In summary, the beneficial effects of the present invention are:

[0022] 1. The present invention provides an effective vertical constraint for the upper chamfered side formwork support system by adding a vertical support 5 for the upper chamfered side formwork of the hollow thin-walled high pier diaphragm, connecting it with the lateral support 4 in the traditional practice, and connecting the vertical support 5 through the diaphragm and the main distribution beam 13 of the bottom formwork support, and at the same time connects the entire support system through a cross bar 8 perpendicular to the plane where the lateral support 4 and the vertical support 5 are located, providing an effective lateral constraint, ensuring that the upper chamfer is cast and formed in one time, and avoiding an increase in concrete consumption caused by the jacking or displacement of the formwork.

[0023] 2. The present invention provides a construction method for a chamfered side formwork support system on the upper part of a hollow thin-walled high pier diaphragm. By adding vibrating transfer steel bars 10, when vibrating concrete, the vibrator is placed in a vibrator placement sleeve 102 of the vibrating transfer steel bars, and then the vibrating transfer steel bars 10 are vibrated to compact the concrete under the side formwork, thereby avoiding honeycombed and rough surfaces caused by loose vibration of the concrete and subsequent repair processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the chamfered side formwork support system of the upper part of the hollow thin-wall high pier diaphragm of the present invention;

[0025] Figure 2 is a flow chart of the construction method of the present invention;

[0026] Reference numerals in the figure: 1-cross partition, 2-pad, 3-back rib, 4-lateral support, 40-steel pipe, 41-adjustable support, 5-vertical support, 6-main rib, 7-panel, 8-cross bar, 9-lateral steel bar, 10-vibration transfer steel bar, 100-vertical section of steel bar, 101-straight section of steel bar, 102-vibrator placement sleeve, 11-angle steel, 12-embedded parts, 13-main distribution beam, 14-hollow thin-walled high pier of the previous construction section, 15-casing. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention and cannot be used to limit the present invention. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention may also have other embodiments and variations thereof, and therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0028] A hollow thin-walled high pier diaphragm upper chamfered side formwork support system, characterized in that it includes a panel 7, a main rib 6, a back rib 3, a transverse support 4, a vertical support 5 and a cross bar 8. The panel 7 covers the chamfered steel bars on the upper part of the diaphragm 1 and is separated from the transverse steel bars 9 by a concrete pad 2. The main rib 6 is arranged on the panel 7 in the same inclination direction as the upper chamfer. The back rib 3 is arranged perpendicular to the main rib 6 at the upper and lower ends of the main rib 6. The upper chamfer of the diaphragm 1 is symmetrical on the left and right. The panel 7, the main rib 6 and the back rib 3 are also arranged symmetrically. A transverse support 4 is set in the middle of the symmetrical back rib 3. The transverse support 4 is connected to the vertical support 5 in the vertical direction. The vertical support 5 passes through the diaphragm 1 through a sleeve and is connected to the main distribution beam 13 of the bottom formwork support of the diaphragm 1. The cross bar 8 is perpendicular to the transverse support 4 and the vertical support 5 at the same time, connecting the entire support system into one.

[0029] In a preferred implementation manner of this embodiment, a steel bar groove is provided at the center of one side of the concrete pad 2, and when in use, the concrete pad 2 is buckled onto the transverse steel bar 9 through the groove.

[0030] In the preferred implementation manner of this embodiment, the vertical support 5 and the main distribution beam 13 supported by the bottom formwork of the diaphragm are cross-connected by setting steel pipes at four corners. The steel pipes are connected to the vertical support 5 with double fasteners and tightly embrace the main distribution beam 13 supported by the bottom formwork of the diaphragm.

[0031] The above embodiment provides effective vertical constraints for the upper chamfered side formwork support system by adding vertical supports 5 for the upper chamfered side formwork of the hollow thin-walled high pier diaphragm and connecting them with the lateral supports 4 in the traditional practice. At the same time, the entire support system is connected by a cross bar 8 perpendicular to the plane where the lateral supports 4 and the vertical supports 5 are located, providing effective lateral constraints, ensuring that the upper chamfer is cast and formed in one step, and avoiding an increase in concrete consumption caused by the lifting or displacement of the formwork.

[0032] The construction method of the hollow thin-walled high pier diaphragm upper chamfered side formwork support system of the present invention is based on the Jiaozuo-Pingdingshan Expressway Xingyang-Xinmi section new construction project. The construction process of the diaphragm upper chamfered side formwork support system of the project specifically includes the following steps:

[0033] S101 diaphragm bottom formwork and upper chamfered side formwork support design;

[0034] The design of the diaphragm bottom formwork support is as follows:

[0035] ①The panel adopts wooden formwork with a thickness of 16mm;

[0036] ② The secondary distribution beam along the bridge direction is made of 60×60mm timber, with a center distance of 0.3m in the transverse direction, supported on vertical 60×60mm timber with a center distance of 0.33m in the direction of the main distribution beam;

[0037] ③ The main distribution beam 13 along the bridge is made of 100×150mm wood, with a center distance of 0.3m in the transverse direction, and is supported on the full-length L16 / 10 unequal-leg angle steels 11 on both sides along the long side direction;

[0038] ④ Each main beam in the transverse direction of the bridge adopts a single full-length L16 / 10 unequal angle steel 11, with a thickness of 10mm, welded to the embedded steel plate 12 with a side center distance of 2.4m along the long side direction;

[0039] ⑤ The embedded part 12 is made of 200×200mm 10mm thick steel plate; the anchor steel bar is made of 2 U-shaped Φ16 ribbed steel bars, each of which is 200mm long;

[0040] The design of the chamfered side formwork support on the upper part of the diaphragm is as follows:

[0041] ① Panel 7 adopts wooden template with a thickness of 16mm;

[0042] ② The main rib 6 along the bridge direction is made of 60×60mm wood, with a center distance of 0.5m in the transverse direction, and is supported on 60×60mm wood back ribs 3 with a vertical spacing of 0.5m;

[0043] ③ The back ribs 3 are made of 60×60mm wooden squares, one each at the top and bottom of the main ribs 6; the vertical spacing between each back rib 3 is 0.5m, supported at both ends of the horizontal support 4;

[0044] ④ Horizontal support 4 is adopted Steel pipe 40, with adjustable supports 41 at both ends of the steel pipe, the maximum horizontal centering distance of the lateral supports 4 is 1m, and the maximum vertical centering distance is 0.5m;

[0045] ⑤Vertical support 5 is adopted Steel pipes, vertical supports and horizontal supports are arranged at equal intervals;

[0046] ⑥ The cross bar 8 is arranged at the connection between the transverse support 4 and the vertical support 5, and the cross bar 8 is perpendicular to both the transverse support 4 and the vertical support 5;

[0047] According to the construction load of the bottom formwork and the upper chamfered side formwork, the concrete pouring load, the concrete vibration load, the concrete deadweight and the deadweight of the support system, the strength and stability of the components of the above support system are verified to meet the requirements;

[0048] S102 embedded parts arrangement;

[0049] After the reinforcement of the previous construction section of the diaphragm is tied, the embedded parts 12 are arranged. The embedded parts 12 are arranged on the two long sides of the cross section of the hollow thin-walled high pier, and then the mold is closed and concrete is poured. After the concrete reaches a predetermined strength, the diaphragm section is constructed;

[0050] S103 diaphragm bottom formwork construction;

[0051] The construction of the bottom formwork of the diaphragm includes welding angle steels 11 along the two long sides of the cross section of the hollow thin-walled high pier on the embedded parts 12 buried in the previous construction section, and then erecting the main distribution beam 13 supported by the bottom formwork on the angle steels 11, and the bottom formwork support system is erected on the main distribution beam 13, and then laying the bottom formwork on the bottom formwork support system, making a hole in the bottom formwork, and setting a sleeve 15 at the position of the hole, and then the vertical support 5 of the chamfered side formwork of the upper part of the diaphragm passes through the sleeve 15 and the hole to connect with the main distribution beam 13 supported by the bottom formwork, and the connection method is to set steel pipes at the four corners through a cross connection, and the steel pipes are connected to the vertical support 5 by double fasteners, and the four corner steel pipes hold the main distribution beam 13 tightly;

[0052] Construction of chamfered side formwork on the upper part of S104 transverse partition;

[0053] The construction of the chamfered side formwork at the upper part of the diaphragm includes the tying of the diaphragm reinforcement bars. After the tying of the reinforcement bars is completed, a concrete pad 2 is placed on the transverse reinforcement bars 9 on the chamfered inclined surface of the upper part of the diaphragm, and a vibrating transfer reinforcement bar 10 is arranged just below the chamfer. The diameter of the reinforcement bar section of the vibrating transfer reinforcement bar 10 is 20 mm, and a vibrator placement sleeve 102 is provided at one end. The diameter of the vibrator is 45 mm, the inner diameter of the sleeve is 50 mm, and the outer diameter of the sleeve is 56 mm. The vibration action radius of the vertical section 100 of the reinforcement bar is 8 times the diameter of the reinforcement bar, and the spacing between adjacent vertical sections 100 of the reinforcement bar is 12 times the diameter of the reinforcement bar. The vibration transfer reinforcement bar 10 is arranged along the transverse reinforcement bar 9. The arrangement spacing in the direction is also 12 times of the steel bar diameter. The main ribs 6 are arranged at a spacing of 0.5m in the long side direction of the cross section of the hollow thin-walled high pier. One back rib 3 is arranged at the top and bottom of the main rib 6. The main rib 6 is parallel to the short side of the panel 7, and the back rib 3 is parallel to the long side of the panel 7. The main rib 6 is nailed to the panel 7, and the back rib 3 is nailed to the main rib 6. Then the panel 7 is covered on the chamfered inclined surface of the upper part of the diaphragm. A transverse support 4 is arranged between the back rib 3 and the back rib 3 of the chamfered side template on the other side. The transverse support steel pipe 40 is screwed so that the transverse support 4 supports the back ribs 3 at both ends through the adjustable support 41, and then each support is connected through the cross bar 8.

[0054] S105 concrete pouring and formwork removal and curing;

[0055] The concrete pouring and demolding and curing include pouring concrete after the construction of the chamfered side formwork on the upper part of the diaphragm is completed. During the pouring process, the steel bars 10 are vibrated and transferred by a vibrator. During the upper chamfering vibration process, the vibrator needs to be placed in the vibrator placement sleeve 102 to vibrate the concrete under the chamfered side formwork on the upper part of the diaphragm to make it dense. After the concrete reaches a predetermined strength, the formwork is removed and the concrete is watered and cured.

[0056] In the above embodiment, by adding vibrating transfer steel bars, a vibrator is used to vibrate the vibrating transfer steel bars during concrete pouring and vibration, and then the vibrating transfer steel bars are used to compact the concrete below the side formwork, thereby avoiding honeycombed and rough surfaces caused by loose vibration of the concrete and subsequent repair processes.

[0057] In summary, the hollow thin-walled high pier diaphragm upper chamfered side formwork support system and construction method of the present invention have the advantages of one-time casting and forming without repair, reducing construction costs and ensuring construction progress in the field of construction formwork engineering.

[0058] It should be understood that the above-mentioned embodiments are one or more embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making pioneering innovations all fall within the scope of protection of the present invention.

Claims

1. A hollow thin-wall high pier diaphragm upper chamfered side formwork support system, characterized by: It includes a panel, main ribs, back ribs, transverse supports, vertical supports and cross bars. The panel is covered on the chamfered steel bars at the upper part of the diaphragm and separated from the transverse steel bars by concrete pads. The main ribs are arranged on the panel parallel to the short sides of the panel. The back ribs are arranged perpendicular to the main ribs at the upper and lower ends. The chamfer of the upper part of the diaphragm is symmetrical. The panel, main ribs and back ribs are also arranged symmetrically. A transverse support is set in the middle of the symmetrical back ribs. The transverse support is connected to the vertical support in the vertical direction. The vertical support passes through the diaphragm through a sleeve and is connected to the main distribution beam supporting the bottom formwork of the diaphragm. The cross bar is perpendicular to the transverse support and the vertical support at the same time, connecting the entire support system into one.

2. The chamfered side formwork support system for the upper part of the hollow thin-walled high pier diaphragm according to claim 1 is characterized in that: A steel bar groove is provided at the center of one side of the concrete pad, and the concrete pad is buckled on the transverse steel bar through the groove when in use.

3. The chamfered side formwork support system for the upper part of the hollow thin-walled high pier diaphragm according to claim 2 is characterized in that: The main distribution beam supported by the vertical support and the bottom formwork of the diaphragm is cross-connected by setting steel pipes at four corners. The steel pipes are connected to the vertical support with double fasteners and hold the main distribution beam supported by the bottom formwork of the diaphragm.

4. A construction method for a chamfered side formwork support system for the upper part of a hollow thin-walled high pier diaphragm, characterized in that: Applied to the chamfered side formwork support system for the upper part of the hollow thin-walled high pier diaphragm as claimed in claim 3, the construction method specifically comprises the following steps: S101 diaphragm bottom formwork and upper chamfered side formwork support design; The support design of the bottom formwork and the upper chamfered side formwork of the diaphragm includes calculating the required panel thickness, the spacing between the main ribs and the back ribs according to the construction loads of the bottom formwork and the upper chamfered side formwork, the concrete dumping load, the concrete vibration load, the deadweight of the concrete and the deadweight of the support system before the construction section before the diaphragm begins, and then determining the specifications of the embedded parts supporting the overall support system; S102 embedded parts arrangement; The embedded parts arrangement includes arranging the embedded parts after the reinforcement of the previous construction segment of the diaphragm is tied, the embedded parts are arranged on the two long sides of the cross section of the hollow thin-walled high pier, and then the mold is closed and concrete is poured. After the concrete reaches a predetermined strength, the diaphragm segment is constructed; S103 diaphragm bottom formwork construction; The construction of the bottom formwork of the diaphragm includes welding angle steels along the two long sides of the cross section of the hollow thin-walled high pier on the embedded parts buried in the previous construction section, and then erecting the main distribution beam supported by the bottom formwork on the angle steels, and then erecting the bottom formwork support system on the main distribution beam, and then laying the bottom formwork on the bottom formwork support system, making openings in the bottom formwork, setting sleeves at the opening positions, and then the vertical support of the chamfered side formwork of the upper part of the diaphragm passes through the sleeves and the openings to be connected with the main distribution beam supported by the bottom formwork; Construction of chamfered side formwork on the upper part of S104 transverse partition; The construction of the chamfered side formwork on the upper part of the diaphragm includes the tying of the reinforcement bars of the diaphragm. After the reinforcement tying is completed, a concrete pad is placed on the transverse reinforcement bars on the chamfered inclined surface of the upper part of the diaphragm, and vibrating transfer reinforcement bars are arranged along the direction of the transverse reinforcement bars. The main ribs and back ribs are arranged at intervals according to the calculations, the main ribs are nailed to the panel, and the back ribs are nailed to the main ribs. Then, the panel is covered on the chamfered inclined surface of the upper part of the diaphragm, and a transverse support is arranged between the back rib and the back rib of the chamfered side formwork on the other side. The transverse support steel pipe is twisted so that the transverse support supports the back ribs at both ends through the adjustable support, and then the transverse support is connected to the vertical support through a transverse rod. S105 concrete pouring and formwork removal and maintenance; The concrete pouring and formwork removal and curing include pouring concrete after the construction of the upper chamfered side formwork of the diaphragm is completed. During the pouring process, the steel bars are transferred by vibrating and tamping with a vibrator. During the upper chamfering vibration process, the vibrator needs to be placed in the vibrator placement sleeve to vibrate and compact the concrete under the upper chamfered side formwork of the diaphragm. After the concrete reaches a predetermined strength, the formwork is removed and the concrete is watered and cured.

5. The construction method of the chamfered side formwork support system for the upper part of the hollow thin-walled high pier diaphragm according to claim 4 is characterized by: In step S104, the vibrating transfer steel bars include a vertical section of the steel bars, a straight section of the steel bars and a vibrator placement sleeve. The vibration action range of the vertical section of the steel bars is 8 times the diameter of the steel bars. The spacing between adjacent vertical sections of the steel bars does not exceed 12 times the diameter of the steel bars. The spacing of the vibrating transfer steel bars along the transverse steel bar direction does not exceed 12 times the diameter of the steel bars.

Images