Set-shaped steel mould pumping concrete ultrahigh cast-in-place vase pier and construction method

Abstract

The invention provides a set-shaped steel mold pumping concrete ultrahigh cast-in-place vase pier and a construction method. The construction method comprises the following steps that a continuous arc bending machine is used for preprocessing steel bars; designing and manufacturing a pier body reinforcing steel bar integral binding jig frame; precisely lofting the axis and the contour line of the pier body, and binding embedded steel bars of the pier body; improving an integral hoisting device of the reinforcement cage; manufacturing and mounting an assembly type ladder cage operation platform; the construction method has the characteristics that the steel bar arc bending operation is simple and convenient, the precision is high, the hoisting device is stable, the prefabricated ladder cage is convenient to assemble and disassemble, and curved section steel bars are convenient to bind. The method is suitable for ultrahigh cast-in-place vase pier engineering.

Description

Technical Field

[0001] The invention relates to the field of vase pier construction, in particular to an ultra-high cast-in-place vase pier pumped with concrete using a fixed steel mold and a construction method. Background Art

[0002] With the rapid development of highway bridge construction and coordination with the surrounding environment, the requirements for appearance are getting higher and higher. Vase piers are gradually being vigorously adopted in the design of highway bridges around cities due to their beautiful appearance. The construction speed of vase piers using traditional construction technology is slow due to the following reasons: ① The steel bar arrangement of vase piers is irregular and complex, and the traditional steel bar production method is ineffective; ② It is difficult to install steel bars on site, the installation accuracy is not easy to control, and the installation of steel bars is prone to errors; ③ The current conventional construction method for bridge piers is combined steel formwork + double-row steel pipe temporary scaffolding. Because the formwork and construction platform are independent systems, repeated installation and disassembly are required, resulting in resource waste and delayed construction period; ④ For high-height vase piers, due to the dense steel bars inside and on the top of the pier, the operators cannot enter the pier body for concrete vibration construction, and multiple casting and molding construction processes are required. This construction process is not only slow to form, but also easy to cause appearance quality defects such as concrete misalignment and color difference. Summary of the invention

[0003] The object of the present invention is to provide a super-high cast-in-place vase pier made of pumped concrete using a standardized steel mold and a construction method for solving the above-mentioned technical problems.

[0004] In order to solve the above technical problems, the present invention provides a construction method of a super-high cast-in-place vase pier using a fixed steel mold pumped concrete, comprising the following steps:

[0005] S1. Pre-processing the steel bars by using a continuous arc bending machine: placing the steel bars to be processed on a workbench, fixing the steel bars to be processed by an adjustable positioning live wheel and a positioning live wheel, and then acting on the steel bars to be processed by a first positioning roller and a second positioning roller to bend the steel bars. After reaching a given arc requirement, the steel bars to be processed are bent in the reverse direction, and the second positioning roller or the first movable positioning roller is applied to the steel bars to be processed to bend them in the reverse direction. When the required arc is reached to form a prefabricated semi-finished steel bar, the movable positioning power mechanism stops moving;

[0006] S2. Design and manufacture the integral binding frame for the pier body reinforcement: connect the prefabricated semi-finished reinforcement to the legs and the diagonal braces; connect the legs and the diagonal braces in the order of diagonal principle, and then arrange the horizontal and vertical spacing of the legs;

[0007] S3. Accurately lay out the axis and contour of the pier body, and tie the embedded steel bars of the pier body: the pier body formwork adopts an integral rigid formwork, the inside of which is covered with waterproof formwork cloth, and the front and side formworks are tightened with angle tie rods;

[0008] S4, improved steel cage overall lifting device: first, install the cable wind rope on the main body of the vase pier; the hoisting object is fixed on the lifting rod through the fixed rope and the fixed rod, and the two ends of the fixed rod and the lifting rod are connected between the two cable wind ropes through the lifting ring, so that the hoisting object can be transported along the direction of the cable wind rope; finally, the lifting rod and the lifting rope are connected to the lifting equipment for lifting operation;

[0009] S5. Fabrication and installation of assembled cage operating platform: The assembled cage operating platform is installed between the lower support and the upper support. First, the embedded parts are arranged on the lower support, and then the pier body is fixed. Then the protective plate is installed to form an assembled cage operating platform. The vertical poles, horizontal pull rods and diagonal pull rods are connected by disc-type buckles on the outer periphery of the pier body to form the skeleton of the assembled cage operating platform, and finally the erection of the assembled cage operating platform is completed.

[0010] The beneficial effects of the present invention are:

[0011] (1) The present invention adopts a continuous arc bending machine during steel bar processing, which can preset the steel bar curvature. After one arc bending, the next reverse curvature can be directly set, thereby improving the steel bar processing accuracy and efficiency. At the same time, a limiting device is provided on the upper platform of the arc bending machine to prevent the steel bar from falling out during the arc bending process;

[0012] (2) The present invention solves the problem of tying steel bars in the curved section by means of a pier body integral tying frame device;

[0013] (3) The present invention adopts an improved overall lifting device for the steel cage to ensure the vertical stability of the steel cage during the lifting process, eliminating the step of manually tensioning the cable wind rope, reducing labor costs, improving wind resistance and stability, and helping to improve construction efficiency;

[0014] (4) The present invention adopts an assembled ladder cage operating platform with standardized components, which is easy to transport and manage; the assembled structure has no scattered and easily lost components and has low loss. The cost of each assembly and disassembly is 1 / 2 of other types of ladders, and it can be hoisted as a whole, which greatly improves the construction efficiency and the reuse rate, and has significant comprehensive benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a continuous arc bending machine from a top view.

[0016] Figure 2 It is a schematic diagram of the transverse cross-section structure of the overall tyre frame.

[0017] Figure 3 It is a schematic diagram of the longitudinal cross-section structure of the overall tyre frame.

[0018] Figure 4 It is a schematic diagram of the top view structure of the integral vase pier steel template.

[0019] Figure 5 This is a schematic diagram of the main perspective structure of the improved overall lifting device for the steel cage.

[0020] Figure 6 It is a schematic diagram of the side elevation structure of the assembled ladder cage operating platform.

[0021] In the figure: 1-operating platform; 2-positioning live wheel; 3-adjustable positioning live wheel; 4-first movable positioning roller; 5-second movable positioning roller; 6-bracket track; 7-movable positioning roller bracket; 8-support plate; 9-adjusting rod; 10-adjusting nut; 11-feeding roller; 12-pressing roller; 13-pressing roller bracket; 14-oil cylinder; 15-oil cylinder bracket; 16-limiting structure; 17-support leg; 18-diagonal brace; 19-support leg support; 20-integral rigid template; 21-angle pull rod; 22-vase pier panel template; 23 -vertical stiffening ribs; 24-transverse ribs; 25-guy ropes; 26-fixed rods; 27-fixed locks; 28-lifting rings; 29-counterweights; 30-lifting rods; 31-lifting ropes; 32-lifting objects; 33-safety ropes; 34-upper support; 35-lower support; 36-assembled cage operating platform; 37-ladder; 38-vertical poles; 39-horizontal pull rods; 40-diagonal pull rods; 41-buckles; 42-protective plates; 43-support guardrails; 44-horizontal connecting rods; 45-adjustable bottom support; 46-adjustable top support; 47-diagonal support. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0024] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0025] like Figure 1-Figure 6 The present invention provides a super-high cast-in-place vase pier with pumped concrete using a fixed steel mold and a construction method, comprising the following steps:

[0026] S1. Pre-process the steel bar by using a continuous arc bending machine: place the steel bar to be processed on the workbench 1, fix the steel bar to be processed by the adjustable positioning live wheel 3 and the positioning live wheel 2, and then act on the steel bar to be processed by the first positioning roller 4 and the second positioning roller 5, so that the steel bar is bent according to the original bending arc. After reaching the given arc requirement, the steel bar to be processed is reversely bent, and the second positioning roller 5 or the first movable positioning roller 4 is applied to the steel bar to be processed to bend it in the opposite direction. When the required arc is reached to form a prefabricated semi-finished steel bar, the movable positioning power mechanism stops. The automatic multi-stage bending of the steel bar is realized.

[0027] The workbench of the continuous bending machine is provided with a bracket track 6, on which there is a movable positioning roller bracket 7, and the adjustable positioning movable wheel 3 is fixed to the movable positioning roller bracket 7 by a pin shaft. The mobile positioning power mechanism includes a plurality of rotatably arranged feeding rollers 11 and pressing rollers 12, the feeding rollers 11 and pressing rollers 12 are fixed on both sides of the steel bars to be processed, the pressing rollers 12 are fixed on the pressing roller bracket 13, and the lower part of the pressing roller bracket 13 is fixed with a cylinder 14 and a cylinder bracket 15. The upper part of the platform is provided with a limiting mechanism 16 that can extend in the horizontal direction, and the limiting mechanism 16 is located on the upper side of the steel bars to be processed and is used to limit the position of the steel bars to prevent the steel bars from slipping upward.

[0028] Among them, a support plate 8 is arranged on the workbench 1 on one side of the adjustable positioning live wheel 3, and an adjusting rod 9 is movably arranged on the support plate 8. An adjusting nut 10 is sleeved on one side of the adjusting rod 9, and the adjusting rod 9 and the adjusting nut 10 are threadedly matched, so that the adjusting nut 10 positions the adjusting rod 9, thereby ensuring the stable positioning of the adjustable positioning live wheel 3 on the steel bars.

[0029] Specifically, after the adjustable positioning live wheel 3 and the positioning live wheel 2 complete the positioning of the steel bars, the first positioning roller 4 and the second positioning roller 5 move to push the steel bars so that the steel bars bend to one side, so as to control the bending angle and direction of the steel bars, wherein the first positioning roller 4 and the second positioning roller 5 can be controlled to move by a hydraulic cylinder.

[0030] S2. Design and manufacture the integral binding frame for the pier body reinforcement: Process and weld the prefabricated semi-finished reinforcement according to the drawings. First, weld the legs 17 and the diagonal braces 18, and then arrange the horizontal and vertical spacing of the legs 17, start welding the reinforcements in different directions, and the frame structure is completed.

[0031] The integral binding frame of the pier body reinforcement includes a plurality of legs 17 and diagonal braces 18. The legs 17 are evenly arranged in the horizontal and vertical directions to form a support structure. The plurality of legs are uniformly descended in the longitudinal direction, and the stroke matches the curvature of the pier column. The diagonal braces 18 are used to strengthen the fixation between the adjacent legs in the longitudinal and horizontal directions. The diagonal braces 18 are arranged crosswise, and the leg support parts 19 are provided at the intersections of the diagonal braces 18.

[0032] S3. Accurately lay out the axis and contour line of the pier body, and tie the embedded steel bars of the pier body: the pier body formwork adopts an integral rigid formwork 20, and the interior of the integral rigid formwork 20 is affixed with a waterproof formwork cloth. The front and side formworks are tightened with 32 diagonal tie rods 21; the vase pier panel formwork 22 adopts ordinary 6mm steel plate, the vertical stiffening ribs 23 adopt 12mm channel steel, and the transverse ribs 24 are 25mm channel steel.

[0033] The integral rigid formwork 20 is divided into blocks according to the cross-sectional form, and the overall structural form is a stiffened panel back truss. The upper and lower layer formworks are connected by positioning pins, and the front formwork and the side formwork are tightened by Φ32mm diagonal tie rods 21 at both ends.

[0034] S4. Improved overall lifting device for steel cage: first, install the guy rope 25 on the main body of the vase pier; fix the hoisting object 32 on the lifting rod 30 through the fixed rope 27 and the fixed rod 26, and the two ends of the fixed rod 26 and the lifting rod 30 are connected between the two guy ropes 25 through the lifting ring 28 so that the hoisting object 32 can be transported along the direction of the guy rope 25; finally, connect the lifting rod 30 and the lifting rope 31 to the lifting equipment for lifting operation.

[0035] The improved steel cage overall lifting device includes a cable wind rope 25, a fixed rod 26, a fixed rope 27, a lifting ring 28, a counterweight 29, a lifting rod 30 and a lifting rope 31; the upper parts of the two cable wind ropes 25 are fixed to the upper part of the vase pier, and the counterweight 29 is hung at the lower ends of the two cable wind ropes 25 to make the cable wind ropes 25 vertical; the fixed rope 27 is connected to the fixed rod 26 and the lifting rod 30 through the lifting ring 28, and the other end of the fixed rope 27 is connected to the lifting object 32 through the lifting ring 28.

[0036] The connection between the lifting rod 30 and the lifting rope 31 is connected to the connection between the fixed rope 27 and the lifting object 32 through the safety rope 33 to improve the lifting stability of the lifting object 32.

[0037] S5, fabrication and installation of assembled cage operating platform 36: the assembled cage platform is installed between the lower support 35 and the upper support 34, firstly, the embedded parts are arranged on the lower support 35, then the pier body is fixed, and then the protective plate 42 is installed to build the assembled cage operating platform 36, and the vertical rod 38, the horizontal tie rod 39 and the oblique tie rod 40 are connected to the outer periphery of the pier body through the disc-type buckle 41 to form the skeleton of the assembled cage operating platform 36. Finally, the erection of the assembled cage operating platform 36 is completed.

[0038] The lower support 35 is connected and fixed to the cantilevered bottom of the assembled ladder cage operating platform 36 by an oblique support 47; the assembled ladder cage operating platform 36 has a ladder 37 inside, and the assembled ladder cage operating platform 36 also includes a vertical pole 38 arranged on the lower support 35, and a number of mutually parallel horizontal tie rods 39 and oblique tie rods 40 are arranged between adjacent vertical poles 38, and the two ends of the oblique tie rod 40 are connected to the ends of two horizontal tie rods 39 of different heights. A protective plate 42 is arranged on the top of the vertical pole 38, and a support guardrail 43 is arranged on the upper support 34, and the support guardrail 43 is fixed to the upper support 34 by a horizontal connecting rod 44, and a number of adjustable bottom brackets 45 are arranged at the bottom of the vertical pole 38, and an adjustable top support 46 is arranged at the top of all vertical poles 38.

[0039] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. The construction method of ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold is characterized by: The following steps are involved: S1. Pre-processing the steel bar by using a continuous arc bending machine: placing the steel bar to be processed on a workbench (1), fixing the steel bar to be processed by an adjustable positioning movable wheel (3) and a positioning movable wheel (2), and then acting on the steel bar to be processed by a first positioning roller (4) and a second positioning roller (5) to bend the steel bar. After reaching a given arc requirement, the steel bar to be processed is bent in the reverse direction. The second positioning roller (5) or the first movable positioning roller (4) is applied to the steel bar to be processed to bend it in the reverse direction. When the required arc is reached to form a prefabricated semi-finished steel bar, the movable positioning power mechanism stops operating. S2. Design and manufacture the integral binding frame of the pier body reinforcement: connect the prefabricated semi-finished reinforcement to the legs (17) and the diagonal braces (18); connect the legs (17) and the diagonal braces (18) in a diagonal order, and then arrange the horizontal and vertical spacing of the legs (17); S3, accurately setting out the axis and contour of the pier body, and tying the embedded steel bars of the pier body: the pier body formwork adopts an integral steel formwork (20), the interior of the integral steel formwork (20) is pasted with a waterproof formwork cloth, and the front and side formworks are tightened by angle tie rods (21); S4, improved steel cage overall lifting device: first, the cable wind rope (25) is installed on the vase pier body; the lifting object (32) is fixed on the lifting rod (30) through the fixed rope (27) and the fixed rod (26), and the two ends of the fixed rod (26) and the lifting rod (30) are connected between the two cable wind ropes (25) through the lifting ring (28), so that the lifting object (32) can be transported along the direction of the cable wind rope (25); finally, the lifting rod (30) and the lifting rope (31) are connected to the lifting equipment to carry out the lifting operation; S5. Fabrication and installation of assembled cage operating platform (36): The assembled cage operating platform (36) is installed between the lower support (35) and the upper support (34). The embedded parts are first arranged on the lower support (35), and then the pier body is fixed. Then, the protective plate (42) is installed to build the assembled cage operating platform (36). The vertical poles (38), horizontal pull rods (39) and oblique pull rods (40) are connected to the outer periphery of the pier body through disc-type buckles (41) to form the skeleton of the assembled cage operating platform (36), and finally the erection of the assembled cage operating platform (36) is completed.

2. The construction method of the ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold according to claim 1 is characterized by: The workbench (1) is provided with a support track (6), and a movable positioning roller support (7) is arranged on the support track (6). The adjustable positioning movable wheel (3) and the movable positioning roller support (7) are fixed via a pin shaft.

3. The construction method of ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold according to claim 1 is characterized by: The mobile positioning power mechanism comprises a plurality of rotatably arranged feeding rollers (11) and pressing rollers (12), wherein the feeding rollers (11) and the pressing rollers (12) are fixed on both sides of the steel bars to be processed, the pressing rollers (12) are fixed on a pressing roller bracket (13), and a cylinder (14) and a cylinder bracket (15) are fixed at the lower part of the pressing roller bracket (13); a limiting mechanism (16) which can extend in a horizontal direction is provided at the upper part of the workbench (1), and the limiting mechanism (16) is located at the upper side of the steel bars to be processed and is used to limit the position of the steel bars.

4. The construction method of the ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold according to claim 1 is characterized by: A support plate (8) is arranged on the workbench (1) at one side of the adjustable positioning movable wheel (3), and an adjusting rod (9) is movably arranged at the support plate (8). An adjusting nut (10) is sleeved on one side of the adjusting rod (9), and the adjusting rod (9) and the adjusting nut (10) are threadedly matched so that the adjusting nut (10) can position the adjusting rod (9).

5. The construction method of ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold according to claim 1 is characterized by: Adjacent supporting legs are fixed by diagonal braces (18), the diagonal braces (18) are arranged crosswise, and supporting leg support portions (19) are provided at the intersections of the diagonal braces (18).

6. The construction method of ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold according to claim 1 is characterized by: The upper part of the wind rope (25) is fixed to the upper part of the vase pier, and a counterweight (29) is hung at the lower end of the wind rope (25) so that the wind rope (25) is vertical; the fixed rope (27) is connected to the fixed rod (26) and the lifting rod (30) through a lifting ring (28), and the other end of the fixed rope (27) is connected to the lifting object (32) through the lifting ring (28).

7. The construction method of ultra-high cast-in-place vase pier with pumped concrete using a fixed steel formwork according to claim 1 is characterized by: The connection point between the lifting rod (30) and the lifting rope (31) is connected to the connection point between the fixed rope (27) and the lifting object (32) through a safety rope (33).

8. The construction method of ultra-high cast-in-place vase pier with pumped concrete using a fixed steel mold according to claim 1 is characterized by: The lower support (35) is connected and fixed to the cantilevered bottom of the assembled ladder cage operating platform (36) through an oblique support (47); a ladder (37) is arranged inside the assembled ladder cage operating platform (36), and the two ends of the oblique pull rod (40) are connected to the ends of two horizontal pull rods (39) of different heights; a protective plate (42) is arranged on the top of the vertical pole (38), and a support guardrail (43) is arranged on the upper support (34), and the support guardrail (43) and the upper support (34) are fixed through a horizontal connecting rod (44); a plurality of adjustable bottom supports (45) are arranged at the bottom of the vertical pole (38), and an adjustable top support (46) is arranged at the top of all the vertical poles (38).

9. A super-high cast-in-place vase pier made of pumped concrete using a fixed steel formwork, characterized in that: The method for constructing ultra-high cast-in-place vase piers by pumping concrete using a standardized steel mold is adopted according to any one of claims 1 to 8.

Images